0.024116
0.000000
0.000000
0.000000
0.018091
0.000000
0.000000
0.000000
0.012077
0.000000
0.000000
0.000000
Klon, A.E.
Heroux, A.
Ross, L.J.
Pathak, V.
Johnson, C.A.
Piper, J.R.
Borhani, D.W.
http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic
4
90.00
90.00
90.00
41.467
55.275
82.799
C3 H7 N O2
89.093
y
ALANINE
L-peptide linking
C6 H15 N4 O2 1
175.209
y
ARGININE
L-peptide linking
C4 H8 N2 O3
132.118
y
ASPARAGINE
L-peptide linking
C4 H7 N O4
133.103
y
ASPARTIC ACID
L-peptide linking
C3 H7 N O2 S
121.158
y
CYSTEINE
L-peptide linking
C5 H10 N2 O3
146.144
y
GLUTAMINE
L-peptide linking
C5 H9 N O4
147.129
y
GLUTAMIC ACID
L-peptide linking
C2 H5 N O2
75.067
y
GLYCINE
peptide linking
C6 H10 N3 O2 1
156.162
y
HISTIDINE
L-peptide linking
H2 O
18.015
WATER
non-polymer
C6 H13 N O2
131.173
y
ISOLEUCINE
L-peptide linking
C6 H13 N O2
131.173
y
LEUCINE
L-peptide linking
C18 H17 N7
331.374
6-([5-QUINOLYLAMINO]METHYL)-2,4-DIAMINO-5-METHYLPYRIDO[2,3-D]PYRIMIDINE
SRI-9439
non-polymer
C6 H15 N2 O2 1
147.195
y
LYSINE
L-peptide linking
C5 H11 N O2 S
149.211
y
METHIONINE
L-peptide linking
C21 H30 N7 O17 P3
745.421
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
non-polymer
C9 H11 N O2
165.189
y
PHENYLALANINE
L-peptide linking
C5 H9 N O2
115.130
y
PROLINE
L-peptide linking
C3 H7 N O3
105.093
y
SERINE
L-peptide linking
O4 S -2
96.063
SULFATE ION
non-polymer
C4 H9 N O3
119.119
y
THREONINE
L-peptide linking
C11 H12 N2 O2
204.225
y
TRYPTOPHAN
L-peptide linking
C9 H11 N O3
181.189
y
TYROSINE
L-peptide linking
C5 H11 N O2
117.146
y
VALINE
L-peptide linking
N
1
N
N
N
2
S
C
N
3
N
C
N
4
N
O
N
5
N
C
N
6
N
O
N
7
N
H
N
8
N
H
N
9
N
H
N
10
N
H
N
11
N
H
N
12
N
H
N
13
N
H
N
14
N
N
N
15
S
C
N
16
N
C
N
17
N
O
N
18
N
C
N
19
N
C
N
20
N
C
N
21
N
N
N
22
N
C
N
23
N
N
N
24
N
N
N
25
N
O
N
26
N
H
N
27
N
H
N
28
N
H
N
29
N
H
N
30
N
H
N
31
N
H
N
32
N
H
N
33
N
H
N
34
N
H
N
35
N
H
N
36
N
H
N
37
N
H
N
38
N
H
N
39
N
H
N
40
N
H
N
41
N
N
N
42
S
C
N
43
N
C
N
44
N
O
N
45
N
C
N
46
N
C
N
47
N
O
N
48
N
N
N
49
N
O
N
50
N
H
N
51
N
H
N
52
N
H
N
53
N
H
N
54
N
H
N
55
N
H
N
56
N
H
N
57
N
H
N
58
N
N
N
59
S
C
N
60
N
C
N
61
N
O
N
62
N
C
N
63
N
C
N
64
N
O
N
65
N
O
N
66
N
O
N
67
N
H
N
68
N
H
N
69
N
H
N
70
N
H
N
71
N
H
N
72
N
H
N
73
N
H
N
74
N
N
N
75
R
C
N
76
N
C
N
77
N
O
N
78
N
C
N
79
N
S
N
80
N
O
N
81
N
H
N
82
N
H
N
83
N
H
N
84
N
H
N
85
N
H
N
86
N
H
N
87
N
H
N
88
N
N
N
89
S
C
N
90
N
C
N
91
N
O
N
92
N
C
N
93
N
C
N
94
N
C
N
95
N
O
N
96
N
N
N
97
N
O
N
98
N
H
N
99
N
H
N
100
N
H
N
101
N
H
N
102
N
H
N
103
N
H
N
104
N
H
N
105
N
H
N
106
N
H
N
107
N
H
N
108
N
N
N
109
S
C
N
110
N
C
N
111
N
O
N
112
N
C
N
113
N
C
N
114
N
C
N
115
N
O
N
116
N
O
N
117
N
O
N
118
N
H
N
119
N
H
N
120
N
H
N
121
N
H
N
122
N
H
N
123
N
H
N
124
N
H
N
125
N
H
N
126
N
H
N
127
N
N
N
128
N
C
N
129
N
C
N
130
N
O
N
131
N
O
N
132
N
H
N
133
N
H
N
134
N
H
N
135
N
H
N
136
N
H
N
137
N
N
N
138
S
C
N
139
N
C
N
140
N
O
N
141
N
C
Y
142
N
C
Y
143
N
N
Y
144
N
C
Y
145
N
C
Y
146
N
N
N
147
N
O
N
148
N
H
N
149
N
H
N
150
N
H
N
151
N
H
N
152
N
H
N
153
N
H
N
154
N
H
N
155
N
H
N
156
N
H
N
157
N
H
N
158
N
O
N
159
N
H
N
160
N
H
N
161
N
N
N
162
S
C
N
163
N
C
N
164
N
O
N
165
S
C
N
166
N
C
N
167
N
C
N
168
N
C
N
169
N
O
N
170
N
H
N
171
N
H
N
172
N
H
N
173
N
H
N
174
N
H
N
175
N
H
N
176
N
H
N
177
N
H
N
178
N
H
N
179
N
H
N
180
N
H
N
181
N
H
N
182
N
H
N
183
N
N
N
184
S
C
N
185
N
C
N
186
N
O
N
187
N
C
N
188
N
C
N
189
N
C
N
190
N
C
N
191
N
O
N
192
N
H
N
193
N
H
N
194
N
H
N
195
N
H
N
196
N
H
N
197
N
H
N
198
N
H
N
199
N
H
N
200
N
H
N
201
N
H
N
202
N
H
N
203
N
H
N
204
N
H
Y
205
N
C
Y
206
N
C
Y
207
N
C
Y
208
N
C
Y
209
N
C
Y
210
N
C
Y
211
N
C
N
212
N
C
Y
213
N
C
Y
214
N
C
Y
215
N
C
Y
216
N
C
N
217
N
C
Y
218
N
C
Y
219
N
C
Y
220
N
C
Y
221
N
C
Y
222
N
C
Y
223
N
N
Y
224
N
N
Y
225
N
N
Y
226
N
N
N
227
N
N
N
228
N
N
N
229
N
N
N
230
N
H
N
231
N
H
N
232
N
H
N
233
N
H
N
234
N
H
N
235
N
H
N
236
N
H
N
237
N
H
N
238
N
H
N
239
N
H
N
240
N
H
N
241
N
H
N
242
N
H
N
243
N
H
N
244
N
H
N
245
N
H
N
246
N
H
N
247
N
N
N
248
S
C
N
249
N
C
N
250
N
O
N
251
N
C
N
252
N
C
N
253
N
C
N
254
N
C
N
255
N
N
N
256
N
O
N
257
N
H
N
258
N
H
N
259
N
H
N
260
N
H
N
261
N
H
N
262
N
H
N
263
N
H
N
264
N
H
N
265
N
H
N
266
N
H
N
267
N
H
N
268
N
H
N
269
N
H
N
270
N
H
N
271
N
H
N
272
N
N
N
273
S
C
N
274
N
C
N
275
N
O
N
276
N
C
N
277
N
C
N
278
N
S
N
279
N
C
N
280
N
O
N
281
N
H
N
282
N
H
N
283
N
H
N
284
N
H
N
285
N
H
N
286
N
H
N
287
N
H
N
288
N
H
N
289
N
H
N
290
N
H
N
291
N
H
N
292
S
P
N
293
N
O
N
294
N
O
N
295
N
O
N
296
N
C
N
297
R
C
N
298
N
O
N
299
R
C
N
300
N
O
N
301
R
C
N
302
N
O
N
303
R
C
Y
304
N
N
Y
305
N
C
Y
306
N
N
Y
307
N
C
Y
308
N
C
N
309
N
N
Y
310
N
N
Y
311
N
C
Y
312
N
N
Y
313
N
C
N
314
N
O
N
315
S
P
N
316
N
O
N
317
N
O
N
318
N
O
N
319
N
C
N
320
R
C
N
321
N
O
N
322
S
C
N
323
N
O
N
324
R
C
N
325
N
O
N
326
R
C
N
327
N
N
N
328
N
C
N
329
N
C
N
330
N
C
N
331
N
O
N
332
N
N
N
333
N
C
N
334
N
C
N
335
N
C
N
336
N
P
N
337
N
O
N
338
N
O
N
339
N
O
N
340
N
H
N
341
N
H
N
342
N
H
N
343
N
H
N
344
N
H
N
345
N
H
N
346
N
H
N
347
N
H
N
348
N
H
N
349
N
H
N
350
N
H
N
351
N
H
N
352
N
H
N
353
N
H
N
354
N
H
N
355
N
H
N
356
N
H
N
357
N
H
N
358
N
H
N
359
N
H
N
360
N
H
N
361
N
H
N
362
N
H
N
363
N
H
N
364
N
H
N
365
N
H
N
366
N
H
N
367
N
H
N
368
N
H
N
369
N
H
N
370
N
N
N
371
S
C
N
372
N
C
N
373
N
O
N
374
N
C
Y
375
N
C
Y
376
N
C
Y
377
N
C
Y
378
N
C
Y
379
N
C
Y
380
N
C
N
381
N
O
N
382
N
H
N
383
N
H
N
384
N
H
N
385
N
H
N
386
N
H
N
387
N
H
N
388
N
H
N
389
N
H
N
390
N
H
N
391
N
H
N
392
N
H
N
393
N
N
N
394
S
C
N
395
N
C
N
396
N
O
N
397
N
C
N
398
N
C
N
399
N
C
N
400
N
O
N
401
N
H
N
402
N
H
N
403
N
H
N
404
N
H
N
405
N
H
N
406
N
H
N
407
N
H
N
408
N
H
N
409
N
H
N
410
N
N
N
411
S
C
N
412
N
C
N
413
N
O
N
414
N
C
N
415
N
O
N
416
N
O
N
417
N
H
N
418
N
H
N
419
N
H
N
420
N
H
N
421
N
H
N
422
N
H
N
423
N
H
N
424
N
S
N
425
N
O
N
426
N
O
N
427
N
O
N
428
N
O
N
429
N
N
N
430
S
C
N
431
N
C
N
432
N
O
N
433
R
C
N
434
N
O
N
435
N
C
N
436
N
O
N
437
N
H
N
438
N
H
N
439
N
H
N
440
N
H
N
441
N
H
N
442
N
H
N
443
N
H
N
444
N
H
N
445
N
H
N
446
N
N
N
447
S
C
N
448
N
C
N
449
N
O
N
450
N
C
Y
451
N
C
Y
452
N
C
Y
453
N
C
Y
454
N
N
Y
455
N
C
Y
456
N
C
Y
457
N
C
Y
458
N
C
Y
459
N
C
N
460
N
O
N
461
N
H
N
462
N
H
N
463
N
H
N
464
N
H
N
465
N
H
N
466
N
H
N
467
N
H
N
468
N
H
N
469
N
H
N
470
N
H
N
471
N
H
N
472
N
H
N
473
N
N
N
474
S
C
N
475
N
C
N
476
N
O
N
477
N
C
Y
478
N
C
Y
479
N
C
Y
480
N
C
Y
481
N
C
Y
482
N
C
Y
483
N
C
N
484
N
O
N
485
N
O
N
486
N
H
N
487
N
H
N
488
N
H
N
489
N
H
N
490
N
H
N
491
N
H
N
492
N
H
N
493
N
H
N
494
N
H
N
495
N
H
N
496
N
H
N
497
N
N
N
498
S
C
N
499
N
C
N
500
N
O
N
501
N
C
N
502
N
C
N
503
N
C
N
504
N
O
N
505
N
H
N
506
N
H
N
507
N
H
N
508
N
H
N
509
N
H
N
510
N
H
N
511
N
H
N
512
N
H
N
513
N
H
N
514
N
H
N
515
N
H
N
1
N
sing
N
2
N
sing
N
3
N
sing
N
4
N
sing
N
5
N
sing
N
6
N
sing
N
7
N
doub
N
8
N
sing
N
9
N
sing
N
10
N
sing
N
11
N
sing
N
12
N
sing
N
13
N
sing
N
14
N
sing
N
15
N
sing
N
16
N
sing
N
17
N
sing
N
18
N
sing
N
19
N
doub
N
20
N
sing
N
21
N
sing
N
22
N
sing
N
23
N
sing
N
24
N
sing
N
25
N
sing
N
26
N
sing
N
27
N
sing
N
28
N
sing
N
29
N
sing
N
30
N
sing
N
31
N
sing
N
32
N
sing
N
33
N
doub
N
34
N
sing
N
35
N
sing
N
36
N
sing
N
37
N
sing
N
38
N
sing
N
39
N
sing
N
40
N
sing
N
41
N
sing
N
42
N
sing
N
43
N
sing
N
44
N
sing
N
45
N
doub
N
46
N
sing
N
47
N
sing
N
48
N
sing
N
49
N
sing
N
50
N
doub
N
51
N
sing
N
52
N
sing
N
53
N
sing
N
54
N
sing
N
55
N
sing
N
56
N
sing
N
57
N
sing
N
58
N
sing
N
59
N
sing
N
60
N
sing
N
61
N
doub
N
62
N
sing
N
63
N
sing
N
64
N
sing
N
65
N
sing
N
66
N
doub
N
67
N
sing
N
68
N
sing
N
69
N
sing
N
70
N
sing
N
71
N
sing
N
72
N
sing
N
73
N
sing
N
74
N
sing
N
75
N
sing
N
76
N
doub
N
77
N
sing
N
78
N
sing
N
79
N
sing
N
80
N
sing
N
81
N
sing
N
82
N
sing
N
83
N
sing
N
84
N
sing
N
85
N
sing
N
86
N
sing
N
87
N
sing
N
88
N
sing
N
89
N
doub
N
90
N
sing
N
91
N
sing
N
92
N
sing
N
93
N
sing
N
94
N
sing
N
95
N
sing
N
96
N
sing
N
97
N
doub
N
98
N
sing
N
99
N
sing
N
100
N
sing
N
101
N
sing
N
102
N
sing
N
103
N
sing
N
104
N
sing
N
105
N
sing
N
106
N
sing
N
107
N
sing
N
108
N
doub
N
109
N
sing
N
110
N
sing
N
111
N
sing
N
112
N
sing
N
113
N
sing
N
114
N
sing
N
115
N
sing
N
116
N
doub
N
117
N
sing
N
118
N
sing
N
119
N
sing
N
120
N
sing
N
121
N
sing
N
122
N
sing
N
123
N
sing
N
124
N
sing
N
125
N
sing
N
126
N
doub
N
127
N
sing
N
128
N
sing
N
129
N
sing
N
130
N
sing
N
131
N
sing
N
132
N
sing
N
133
N
sing
N
134
N
sing
N
135
N
doub
N
136
N
sing
N
137
N
sing
N
138
N
sing
N
139
N
sing
Y
140
N
sing
Y
141
N
doub
Y
142
N
doub
N
143
N
sing
Y
144
N
sing
N
145
N
sing
Y
146
N
sing
N
147
N
sing
N
148
N
sing
N
149
N
sing
N
150
N
sing
N
151
N
sing
N
152
N
sing
N
153
N
sing
N
154
N
sing
N
155
N
sing
N
156
N
sing
N
157
N
sing
N
158
N
doub
N
159
N
sing
N
160
N
sing
N
161
N
sing
N
162
N
sing
N
163
N
sing
N
164
N
sing
N
165
N
sing
N
166
N
sing
N
167
N
sing
N
168
N
sing
N
169
N
sing
N
170
N
sing
N
171
N
sing
N
172
N
sing
N
173
N
sing
N
174
N
sing
N
175
N
sing
N
176
N
sing
N
177
N
sing
N
178
N
sing
N
179
N
doub
N
180
N
sing
N
181
N
sing
N
182
N
sing
N
183
N
sing
N
184
N
sing
N
185
N
sing
N
186
N
sing
N
187
N
sing
N
188
N
sing
N
189
N
sing
N
190
N
sing
N
191
N
sing
N
192
N
sing
N
193
N
sing
Y
194
N
doub
Y
195
N
sing
Y
196
N
sing
Y
197
N
sing
N
198
N
sing
Y
199
N
doub
Y
200
N
sing
N
201
N
sing
Y
202
N
doub
Y
203
N
sing
Y
204
N
doub
N
205
N
sing
Y
206
N
sing
N
207
N
sing
Y
208
N
doub
N
209
N
sing
N
210
N
sing
N
211
N
sing
N
212
N
sing
Y
213
N
doub
Y
214
N
sing
N
215
N
sing
Y
216
N
sing
N
217
N
sing
Y
218
N
doub
N
219
N
sing
Y
220
N
sing
N
221
N
sing
N
222
N
sing
N
223
N
sing
N
224
N
sing
Y
225
N
doub
Y
226
N
sing
N
227
N
sing
Y
228
N
sing
Y
229
N
doub
Y
230
N
doub
Y
231
N
sing
N
232
N
sing
N
233
N
sing
N
234
N
sing
N
235
N
sing
N
236
N
sing
N
237
N
sing
N
238
N
sing
N
239
N
sing
N
240
N
sing
N
241
N
sing
N
242
N
sing
N
243
N
sing
N
244
N
sing
N
245
N
doub
N
246
N
sing
N
247
N
sing
N
248
N
sing
N
249
N
sing
N
250
N
sing
N
251
N
sing
N
252
N
sing
N
253
N
sing
N
254
N
sing
N
255
N
sing
N
256
N
sing
N
257
N
sing
N
258
N
sing
N
259
N
sing
N
260
N
sing
N
261
N
sing
N
262
N
sing
N
263
N
sing
N
264
N
sing
N
265
N
sing
N
266
N
sing
N
267
N
sing
N
268
N
sing
N
269
N
doub
N
270
N
sing
N
271
N
sing
N
272
N
sing
N
273
N
sing
N
274
N
sing
N
275
N
sing
N
276
N
sing
N
277
N
sing
N
278
N
sing
N
279
N
sing
N
280
N
sing
N
281
N
sing
N
282
N
doub
N
283
N
sing
N
284
N
sing
N
285
N
sing
N
286
N
sing
N
287
N
sing
N
288
N
sing
N
289
N
sing
N
290
N
sing
N
291
N
sing
N
292
N
sing
N
293
N
sing
N
294
N
sing
N
295
N
sing
N
296
N
sing
N
297
N
sing
N
298
N
sing
N
299
N
sing
N
300
N
sing
N
301
N
sing
N
302
N
sing
N
303
N
sing
N
304
N
sing
Y
305
N
sing
Y
306
N
sing
Y
307
N
doub
N
308
N
sing
Y
309
N
sing
Y
310
N
sing
Y
311
N
doub
N
312
N
sing
Y
313
N
doub
N
314
N
sing
N
315
N
sing
Y
316
N
sing
Y
317
N
doub
N
318
N
sing
Y
319
N
sing
N
320
N
sing
N
321
N
doub
N
322
N
sing
N
323
N
sing
N
324
N
sing
N
325
N
sing
N
326
N
sing
N
327
N
sing
N
328
N
sing
N
329
N
sing
N
330
N
sing
N
331
N
sing
N
332
N
sing
N
333
N
sing
N
334
N
sing
N
335
N
sing
N
336
N
sing
N
337
N
sing
N
338
N
sing
N
339
N
sing
N
340
N
sing
N
341
N
sing
N
342
N
sing
N
343
N
sing
N
344
N
sing
N
345
N
doub
N
346
N
sing
N
347
N
sing
N
348
N
sing
N
349
N
doub
N
350
N
sing
N
351
N
sing
N
352
N
sing
N
353
N
sing
N
354
N
sing
N
355
N
sing
N
356
N
doub
N
357
N
sing
N
358
N
sing
N
359
N
doub
N
360
N
sing
N
361
N
sing
N
362
N
sing
N
363
N
sing
N
364
N
sing
N
365
N
sing
N
366
N
sing
N
367
N
sing
N
368
N
sing
N
369
N
sing
N
370
N
doub
N
371
N
sing
N
372
N
sing
N
373
N
sing
N
374
N
sing
Y
375
N
doub
Y
376
N
sing
Y
377
N
sing
N
378
N
sing
Y
379
N
doub
N
380
N
sing
Y
381
N
doub
N
382
N
sing
Y
383
N
sing
N
384
N
sing
N
385
N
sing
N
386
N
sing
N
387
N
sing
N
388
N
sing
N
389
N
sing
N
390
N
sing
N
391
N
sing
N
392
N
sing
N
393
N
doub
N
394
N
sing
N
395
N
sing
N
396
N
sing
N
397
N
sing
N
398
N
sing
N
399
N
sing
N
400
N
sing
N
401
N
sing
N
402
N
sing
N
403
N
sing
N
404
N
sing
N
405
N
sing
N
406
N
sing
N
407
N
sing
N
408
N
sing
N
409
N
sing
N
410
N
doub
N
411
N
sing
N
412
N
sing
N
413
N
sing
N
414
N
sing
N
415
N
sing
N
416
N
sing
N
417
N
doub
N
418
N
doub
N
419
N
sing
N
420
N
sing
N
421
N
sing
N
422
N
sing
N
423
N
sing
N
424
N
sing
N
425
N
sing
N
426
N
sing
N
427
N
doub
N
428
N
sing
N
429
N
sing
N
430
N
sing
N
431
N
sing
N
432
N
sing
N
433
N
sing
N
434
N
sing
N
435
N
sing
N
436
N
sing
N
437
N
sing
N
438
N
sing
N
439
N
sing
N
440
N
sing
N
441
N
sing
N
442
N
sing
N
443
N
doub
N
444
N
sing
N
445
N
sing
N
446
N
sing
N
447
N
sing
Y
448
N
doub
Y
449
N
sing
Y
450
N
sing
N
451
N
sing
Y
452
N
doub
Y
453
N
sing
Y
454
N
sing
N
455
N
sing
Y
456
N
sing
Y
457
N
doub
N
458
N
sing
Y
459
N
doub
N
460
N
sing
Y
461
N
sing
N
462
N
sing
N
463
N
sing
N
464
N
sing
N
465
N
sing
N
466
N
sing
N
467
N
sing
N
468
N
sing
N
469
N
sing
N
470
N
sing
N
471
N
doub
N
472
N
sing
N
473
N
sing
N
474
N
sing
N
475
N
sing
Y
476
N
doub
Y
477
N
sing
Y
478
N
sing
N
479
N
sing
Y
480
N
doub
N
481
N
sing
Y
482
N
doub
N
483
N
sing
Y
484
N
sing
N
485
N
sing
N
486
N
sing
N
487
N
sing
N
488
N
sing
N
489
N
sing
N
490
N
sing
N
491
N
sing
N
492
N
sing
N
493
N
sing
N
494
N
sing
N
495
N
doub
N
496
N
sing
N
497
N
sing
N
498
N
sing
N
499
N
sing
N
500
N
sing
N
501
N
sing
N
502
N
sing
N
503
N
sing
N
504
N
sing
N
505
N
sing
N
506
N
sing
UK
J.Mol.Biol.
JMOBAK
0070
0022-2836
320
677
693
10.1016/S0022-2836(02)00469-2
12096917
Atomic structures of human dihydrofolate reductase complexed with NADPH and two lipophilic antifolates at 1.09 a and 1.05 a resolution.
2002
10.2210/pdb1kms/pdb
pdb_00001kms
1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
100.0
1
PT-COATED MIRROR
IMAGE PLATE
1997-06-25
MARRESEARCH
SI (111)
SINGLE WAVELENGTH
M
x-ray
1
1.08
1.0
BL7-1
SSRL
1.08
SYNCHROTRON
SSRL BEAMLINE BL7-1
21349.525
DIHYDROFOLATE REDUCTASE
1.5.1.3
1
man
polymer
96.063
SULFATE ION
2
syn
non-polymer
331.374
6-([5-QUINOLYLAMINO]METHYL)-2,4-DIAMINO-5-METHYLPYRIDO[2,3-D]PYRIMIDINE
1
syn
non-polymer
745.421
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
1
syn
non-polymer
18.015
water
399
nat
water
DHFR
no
no
VGSLNCIVAVSQNMGIGKNGDLPWPPLRNEFRYFQRMTTTSSVEGKQNLVIMGKKTWFSIPEKNRPLKGRINLVLSRELK
EPPQGAHFLSRSLDDALKLTEQPELANKVDMVWIVGGSSVYKEAMNHPGHLKLFVTRIMQDFESDTFFPEIDLEKYKLLP
EYPGVLSDVQEEKGIKYKFEVYEKND
VGSLNCIVAVSQNMGIGKNGDLPWPPLRNEFRYFQRMTTTSSVEGKQNLVIMGKKTWFSIPEKNRPLKGRINLVLSRELK
EPPQGAHFLSRSLDDALKLTEQPELANKVDMVWIVGGSSVYKEAMNHPGHLKLFVTRIMQDFESDTFFPEIDLEKYKLLP
EYPGVLSDVQEEKGIKYKFEVYEKND
A
polypeptide(L)
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
human
Homo
Escherichia
Escherichia coli
sample
9606
Homo sapiens
CYTOPLASM
469008
Escherichia coli BL21(DE3)
BL21(DE3)
PET11A
PLASMID
PDFR
1
2.23
46
VAPOR DIFFUSION, HANGING DROP
8.00
THE TERNARY COMPLEX OF DHFR
WITH NADPH AND SRI-9439 WAS FORMED BY MIXING HUMAN DHFR
(20 MG/ML IN 25 MM KPO4 (PH 7.0), 0.1 MM EDTA, AND 3 MM
NAN3) WITH 60 MM NADPH, FOLLOWED 15 MINUTES LATER BY 60 MM
OF INHIBITOR IN DMSO (FINAL CONCENTRATIONS OF 2 MM NADPH
AND 2 MM INHIBITOR). THIS COMPLEX SOLUTION WAS MIXED WITH
AN EQUAL VOLUME OF PRECIPITANT CONTAINING 24-33% PEG 4000,
0.2 M LI2SO4, 0.1 M TRIS CL (PH 7.9-8.4), AND EQUILIBRATED
WITH THE PRECIPITANT BY HANGING DROP VAPOR DIFFUSION AT
277 K. THE CRYSTAL GREW IN ABOUT 3 WEEKS. THE CRYSTAL WAS
FLASH-COOLED DIRECTLY IN LIQUID NITROGEN AFTER HARVESTING
INTO MOTHER LIQUOR CONTAINING 10% GLYCEROL., pH 8.00, VAPOR DIFFUSION, HANGING DROP
277
chem_comp_atom
chem_comp_bond
database_2
struct_site
pdbx_initial_refinement_model
repository
Initial release
Version format compliance
Version format compliance
Data collection
Database references
Derived calculations
Refinement description
1
0
2002-07-10
1
1
2008-04-27
1
2
2011-07-13
1
3
2024-02-14
1
4
2024-04-03
_database_2.pdbx_DOI
_database_2.pdbx_database_accession
_struct_site.pdbx_auth_asym_id
_struct_site.pdbx_auth_comp_id
_struct_site.pdbx_auth_seq_id
HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH NADPH AND (Z)-6-(2-[2,5-DIMETHOXYPHENYL]ETHEN-1-YL)-2,4-DIAMINO-5-METHYLPYRIDO[2,3-D]PYRIMIDINE (SRI-9662), A LIPOPHILIC ANTIFOLATE
RCSB
Y
RCSB
2001-12-17
REL
REL
SO4
SULFATE ION
LIH
6-([5-QUINOLYLAMINO]METHYL)-2,4-DIAMINO-5-METHYLPYRIDO[2,3-D]PYRIMIDINE
NDP
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
HOH
water
UNPUBLISHED HUMAN DHFR STRUCTURE.
other
SUL
203
2
SO4
SO4
203
A
SUL
204
2
SO4
SO4
204
A
LIH
201
3
LIH
LIH
201
A
NDP
202
4
NDP
NDP
202
A
HOH
301
5
HOH
HOH
301
A
HOH
302
5
HOH
HOH
302
A
HOH
303
5
HOH
HOH
303
A
HOH
304
5
HOH
HOH
304
A
HOH
305
5
HOH
HOH
305
A
HOH
306
5
HOH
HOH
306
A
HOH
307
5
HOH
HOH
307
A
HOH
308
5
HOH
HOH
308
A
HOH
309
5
HOH
HOH
309
A
HOH
310
5
HOH
HOH
310
A
HOH
311
5
HOH
HOH
311
A
HOH
312
5
HOH
HOH
312
A
HOH
313
5
HOH
HOH
313
A
HOH
314
5
HOH
HOH
314
A
HOH
315
5
HOH
HOH
315
A
HOH
316
5
HOH
HOH
316
A
HOH
317
5
HOH
HOH
317
A
HOH
318
5
HOH
HOH
318
A
HOH
319
5
HOH
HOH
319
A
HOH
320
5
HOH
HOH
320
A
HOH
321
5
HOH
HOH
321
A
HOH
322
5
HOH
HOH
322
A
HOH
323
5
HOH
HOH
323
A
HOH
324
5
HOH
HOH
324
A
HOH
325
5
HOH
HOH
325
A
HOH
326
5
HOH
HOH
326
A
HOH
327
5
HOH
HOH
327
A
HOH
328
5
HOH
HOH
328
A
HOH
329
5
HOH
HOH
329
A
HOH
330
5
HOH
HOH
330
A
HOH
331
5
HOH
HOH
331
A
HOH
332
5
HOH
HOH
332
A
HOH
333
5
HOH
HOH
333
A
HOH
334
5
HOH
HOH
334
A
HOH
335
5
HOH
HOH
335
A
HOH
336
5
HOH
HOH
336
A
HOH
337
5
HOH
HOH
337
A
HOH
338
5
HOH
HOH
338
A
HOH
339
5
HOH
HOH
339
A
HOH
340
5
HOH
HOH
340
A
HOH
341
5
HOH
HOH
341
A
HOH
342
5
HOH
HOH
342
A
HOH
343
5
HOH
HOH
343
A
HOH
344
5
HOH
HOH
344
A
HOH
345
5
HOH
HOH
345
A
HOH
346
5
HOH
HOH
346
A
HOH
347
5
HOH
HOH
347
A
HOH
348
5
HOH
HOH
348
A
HOH
349
5
HOH
HOH
349
A
HOH
350
5
HOH
HOH
350
A
HOH
351
5
HOH
HOH
351
A
HOH
352
5
HOH
HOH
352
A
HOH
353
5
HOH
HOH
353
A
HOH
354
5
HOH
HOH
354
A
HOH
355
5
HOH
HOH
355
A
HOH
356
5
HOH
HOH
356
A
HOH
357
5
HOH
HOH
357
A
HOH
358
5
HOH
HOH
358
A
HOH
359
5
HOH
HOH
359
A
HOH
360
5
HOH
HOH
360
A
HOH
361
5
HOH
HOH
361
A
HOH
362
5
HOH
HOH
362
A
HOH
363
5
HOH
HOH
363
A
HOH
364
5
HOH
HOH
364
A
HOH
365
5
HOH
HOH
365
A
HOH
366
5
HOH
HOH
366
A
HOH
367
5
HOH
HOH
367
A
HOH
368
5
HOH
HOH
368
A
HOH
369
5
HOH
HOH
369
A
HOH
370
5
HOH
HOH
370
A
HOH
371
5
HOH
HOH
371
A
HOH
372
5
HOH
HOH
372
A
HOH
373
5
HOH
HOH
373
A
HOH
374
5
HOH
HOH
374
A
HOH
375
5
HOH
HOH
375
A
HOH
376
5
HOH
HOH
376
A
HOH
377
5
HOH
HOH
377
A
HOH
378
5
HOH
HOH
378
A
HOH
379
5
HOH
HOH
379
A
HOH
380
5
HOH
HOH
380
A
HOH
381
5
HOH
HOH
381
A
HOH
382
5
HOH
HOH
382
A
HOH
383
5
HOH
HOH
383
A
HOH
384
5
HOH
HOH
384
A
HOH
385
5
HOH
HOH
385
A
HOH
386
5
HOH
HOH
386
A
HOH
387
5
HOH
HOH
387
A
HOH
388
5
HOH
HOH
388
A
HOH
389
5
HOH
HOH
389
A
HOH
390
5
HOH
HOH
390
A
HOH
391
5
HOH
HOH
391
A
HOH
392
5
HOH
HOH
392
A
HOH
393
5
HOH
HOH
393
A
HOH
394
5
HOH
HOH
394
A
HOH
395
5
HOH
HOH
395
A
HOH
396
5
HOH
HOH
396
A
HOH
397
5
HOH
HOH
397
A
HOH
398
5
HOH
HOH
398
A
HOH
399
5
HOH
HOH
399
A
HOH
400
5
HOH
HOH
400
A
HOH
401
5
HOH
HOH
401
A
HOH
402
5
HOH
HOH
402
A
HOH
403
5
HOH
HOH
403
A
HOH
404
5
HOH
HOH
404
A
HOH
405
5
HOH
HOH
405
A
HOH
406
5
HOH
HOH
406
A
HOH
407
5
HOH
HOH
407
A
HOH
408
5
HOH
HOH
408
A
HOH
409
5
HOH
HOH
409
A
HOH
410
5
HOH
HOH
410
A
HOH
411
5
HOH
HOH
411
A
HOH
412
5
HOH
HOH
412
A
HOH
413
5
HOH
HOH
413
A
HOH
414
5
HOH
HOH
414
A
HOH
415
5
HOH
HOH
415
A
HOH
416
5
HOH
HOH
416
A
HOH
417
5
HOH
HOH
417
A
HOH
418
5
HOH
HOH
418
A
HOH
419
5
HOH
HOH
419
A
HOH
420
5
HOH
HOH
420
A
HOH
421
5
HOH
HOH
421
A
HOH
422
5
HOH
HOH
422
A
HOH
423
5
HOH
HOH
423
A
HOH
424
5
HOH
HOH
424
A
HOH
425
5
HOH
HOH
425
A
HOH
426
5
HOH
HOH
426
A
HOH
427
5
HOH
HOH
427
A
HOH
428
5
HOH
HOH
428
A
HOH
429
5
HOH
HOH
429
A
HOH
430
5
HOH
HOH
430
A
HOH
431
5
HOH
HOH
431
A
HOH
432
5
HOH
HOH
432
A
HOH
433
5
HOH
HOH
433
A
HOH
434
5
HOH
HOH
434
A
HOH
435
5
HOH
HOH
435
A
HOH
436
5
HOH
HOH
436
A
HOH
437
5
HOH
HOH
437
A
HOH
438
5
HOH
HOH
438
A
HOH
439
5
HOH
HOH
439
A
HOH
440
5
HOH
HOH
440
A
HOH
441
5
HOH
HOH
441
A
HOH
442
5
HOH
HOH
442
A
HOH
443
5
HOH
HOH
443
A
HOH
444
5
HOH
HOH
444
A
HOH
445
5
HOH
HOH
445
A
HOH
446
5
HOH
HOH
446
A
HOH
447
5
HOH
HOH
447
A
HOH
448
5
HOH
HOH
448
A
HOH
449
5
HOH
HOH
449
A
HOH
450
5
HOH
HOH
450
A
HOH
451
5
HOH
HOH
451
A
HOH
452
5
HOH
HOH
452
A
HOH
453
5
HOH
HOH
453
A
HOH
454
5
HOH
HOH
454
A
HOH
455
5
HOH
HOH
455
A
HOH
456
5
HOH
HOH
456
A
HOH
457
5
HOH
HOH
457
A
HOH
458
5
HOH
HOH
458
A
HOH
459
5
HOH
HOH
459
A
HOH
460
5
HOH
HOH
460
A
HOH
461
5
HOH
HOH
461
A
HOH
462
5
HOH
HOH
462
A
HOH
463
5
HOH
HOH
463
A
HOH
464
5
HOH
HOH
464
A
HOH
465
5
HOH
HOH
465
A
HOH
466
5
HOH
HOH
466
A
HOH
467
5
HOH
HOH
467
A
HOH
468
5
HOH
HOH
468
A
HOH
469
5
HOH
HOH
469
A
HOH
470
5
HOH
HOH
470
A
HOH
471
5
HOH
HOH
471
A
HOH
472
5
HOH
HOH
472
A
HOH
473
5
HOH
HOH
473
A
HOH
474
5
HOH
HOH
474
A
HOH
475
5
HOH
HOH
475
A
HOH
476
5
HOH
HOH
476
A
HOH
477
5
HOH
HOH
477
A
HOH
478
5
HOH
HOH
478
A
HOH
479
5
HOH
HOH
479
A
HOH
480
5
HOH
HOH
480
A
HOH
481
5
HOH
HOH
481
A
HOH
482
5
HOH
HOH
482
A
HOH
483
5
HOH
HOH
483
A
HOH
484
5
HOH
HOH
484
A
HOH
485
5
HOH
HOH
485
A
HOH
486
5
HOH
HOH
486
A
HOH
487
5
HOH
HOH
487
A
HOH
488
5
HOH
HOH
488
A
HOH
489
5
HOH
HOH
489
A
HOH
490
5
HOH
HOH
490
A
HOH
491
5
HOH
HOH
491
A
HOH
492
5
HOH
HOH
492
A
HOH
493
5
HOH
HOH
493
A
HOH
494
5
HOH
HOH
494
A
HOH
495
5
HOH
HOH
495
A
HOH
496
5
HOH
HOH
496
A
HOH
497
5
HOH
HOH
497
A
HOH
498
5
HOH
HOH
498
A
HOH
499
5
HOH
HOH
499
A
HOH
500
5
HOH
HOH
500
A
HOH
501
5
HOH
HOH
501
A
HOH
502
5
HOH
HOH
502
A
HOH
503
5
HOH
HOH
503
A
HOH
504
5
HOH
HOH
504
A
HOH
505
5
HOH
HOH
505
A
HOH
506
5
HOH
HOH
506
A
HOH
507
5
HOH
HOH
507
A
HOH
508
5
HOH
HOH
508
A
HOH
509
5
HOH
HOH
509
A
HOH
510
5
HOH
HOH
510
A
HOH
511
5
HOH
HOH
511
A
HOH
512
5
HOH
HOH
512
A
HOH
513
5
HOH
HOH
513
A
HOH
514
5
HOH
HOH
514
A
HOH
515
5
HOH
HOH
515
A
HOH
516
5
HOH
HOH
516
A
HOH
517
5
HOH
HOH
517
A
HOH
518
5
HOH
HOH
518
A
HOH
519
5
HOH
HOH
519
A
HOH
520
5
HOH
HOH
520
A
HOH
521
5
HOH
HOH
521
A
HOH
522
5
HOH
HOH
522
A
HOH
523
5
HOH
HOH
523
A
HOH
524
5
HOH
HOH
524
A
HOH
525
5
HOH
HOH
525
A
HOH
526
5
HOH
HOH
526
A
HOH
527
5
HOH
HOH
527
A
HOH
528
5
HOH
HOH
528
A
HOH
529
5
HOH
HOH
529
A
HOH
530
5
HOH
HOH
530
A
HOH
531
5
HOH
HOH
531
A
HOH
532
5
HOH
HOH
532
A
HOH
533
5
HOH
HOH
533
A
HOH
534
5
HOH
HOH
534
A
HOH
535
5
HOH
HOH
535
A
HOH
536
5
HOH
HOH
536
A
HOH
537
5
HOH
HOH
537
A
HOH
538
5
HOH
HOH
538
A
HOH
539
5
HOH
HOH
539
A
HOH
540
5
HOH
HOH
540
A
HOH
541
5
HOH
HOH
541
A
HOH
542
5
HOH
HOH
542
A
HOH
543
5
HOH
HOH
543
A
HOH
544
5
HOH
HOH
544
A
HOH
545
5
HOH
HOH
545
A
HOH
546
5
HOH
HOH
546
A
HOH
547
5
HOH
HOH
547
A
HOH
548
5
HOH
HOH
548
A
HOH
549
5
HOH
HOH
549
A
HOH
550
5
HOH
HOH
550
A
HOH
551
5
HOH
HOH
551
A
HOH
552
5
HOH
HOH
552
A
HOH
553
5
HOH
HOH
553
A
HOH
554
5
HOH
HOH
554
A
HOH
555
5
HOH
HOH
555
A
HOH
556
5
HOH
HOH
556
A
HOH
557
5
HOH
HOH
557
A
HOH
558
5
HOH
HOH
558
A
HOH
559
5
HOH
HOH
559
A
HOH
560
5
HOH
HOH
560
A
HOH
561
5
HOH
HOH
561
A
HOH
562
5
HOH
HOH
562
A
HOH
563
5
HOH
HOH
563
A
HOH
564
5
HOH
HOH
564
A
HOH
565
5
HOH
HOH
565
A
HOH
566
5
HOH
HOH
566
A
HOH
567
5
HOH
HOH
567
A
HOH
568
5
HOH
HOH
568
A
HOH
569
5
HOH
HOH
569
A
HOH
570
5
HOH
HOH
570
A
HOH
571
5
HOH
HOH
571
A
HOH
572
5
HOH
HOH
572
A
HOH
573
5
HOH
HOH
573
A
HOH
574
5
HOH
HOH
574
A
HOH
575
5
HOH
HOH
575
A
HOH
576
5
HOH
HOH
576
A
HOH
577
5
HOH
HOH
577
A
HOH
578
5
HOH
HOH
578
A
HOH
579
5
HOH
HOH
579
A
HOH
580
5
HOH
HOH
580
A
HOH
581
5
HOH
HOH
581
A
HOH
582
5
HOH
HOH
582
A
HOH
583
5
HOH
HOH
583
A
HOH
584
5
HOH
HOH
584
A
HOH
585
5
HOH
HOH
585
A
HOH
586
5
HOH
HOH
586
A
HOH
587
5
HOH
HOH
587
A
HOH
588
5
HOH
HOH
588
A
HOH
589
5
HOH
HOH
589
A
HOH
590
5
HOH
HOH
590
A
HOH
591
5
HOH
HOH
591
A
HOH
592
5
HOH
HOH
592
A
HOH
593
5
HOH
HOH
593
A
HOH
594
5
HOH
HOH
594
A
HOH
595
5
HOH
HOH
595
A
HOH
596
5
HOH
HOH
596
A
HOH
597
5
HOH
HOH
597
A
HOH
598
5
HOH
HOH
598
A
HOH
599
5
HOH
HOH
599
A
HOH
600
5
HOH
HOH
600
A
HOH
601
5
HOH
HOH
601
A
HOH
602
5
HOH
HOH
602
A
HOH
603
5
HOH
HOH
603
A
HOH
604
5
HOH
HOH
604
A
HOH
605
5
HOH
HOH
605
A
HOH
606
5
HOH
HOH
606
A
HOH
607
5
HOH
HOH
607
A
HOH
608
5
HOH
HOH
608
A
HOH
609
5
HOH
HOH
609
A
HOH
610
5
HOH
HOH
610
A
HOH
611
5
HOH
HOH
611
A
HOH
612
5
HOH
HOH
612
A
HOH
613
5
HOH
HOH
613
A
HOH
614
5
HOH
HOH
614
A
HOH
615
5
HOH
HOH
615
A
HOH
616
5
HOH
HOH
616
A
HOH
617
5
HOH
HOH
617
A
HOH
618
5
HOH
HOH
618
A
HOH
619
5
HOH
HOH
619
A
HOH
620
5
HOH
HOH
620
A
HOH
621
5
HOH
HOH
621
A
HOH
622
5
HOH
HOH
622
A
HOH
623
5
HOH
HOH
623
A
HOH
624
5
HOH
HOH
624
A
HOH
625
5
HOH
HOH
625
A
HOH
626
5
HOH
HOH
626
A
HOH
627
5
HOH
HOH
627
A
HOH
628
5
HOH
HOH
628
A
HOH
629
5
HOH
HOH
629
A
HOH
630
5
HOH
HOH
630
A
HOH
631
5
HOH
HOH
631
A
HOH
632
5
HOH
HOH
632
A
HOH
633
5
HOH
HOH
633
A
HOH
634
5
HOH
HOH
634
A
HOH
635
5
HOH
HOH
635
A
HOH
636
5
HOH
HOH
636
A
HOH
637
5
HOH
HOH
637
A
HOH
638
5
HOH
HOH
638
A
HOH
639
5
HOH
HOH
639
A
HOH
640
5
HOH
HOH
640
A
HOH
641
5
HOH
HOH
641
A
HOH
642
5
HOH
HOH
642
A
HOH
643
5
HOH
HOH
643
A
HOH
644
5
HOH
HOH
644
A
HOH
645
5
HOH
HOH
645
A
HOH
646
5
HOH
HOH
646
A
HOH
647
5
HOH
HOH
647
A
HOH
648
5
HOH
HOH
648
A
HOH
649
5
HOH
HOH
649
A
HOH
650
5
HOH
HOH
650
A
HOH
651
5
HOH
HOH
651
A
HOH
652
5
HOH
HOH
652
A
HOH
653
5
HOH
HOH
653
A
HOH
654
5
HOH
HOH
654
A
HOH
655
5
HOH
HOH
655
A
HOH
656
5
HOH
HOH
656
A
HOH
657
5
HOH
HOH
657
A
HOH
658
5
HOH
HOH
658
A
HOH
659
5
HOH
HOH
659
A
HOH
660
5
HOH
HOH
660
A
HOH
661
5
HOH
HOH
661
A
HOH
662
5
HOH
HOH
662
A
HOH
663
5
HOH
HOH
663
A
HOH
664
5
HOH
HOH
664
A
HOH
665
5
HOH
HOH
665
A
HOH
666
5
HOH
HOH
666
A
HOH
667
5
HOH
HOH
667
A
HOH
668
5
HOH
HOH
668
A
HOH
669
5
HOH
HOH
669
A
HOH
670
5
HOH
HOH
670
A
HOH
671
5
HOH
HOH
671
A
HOH
672
5
HOH
HOH
672
A
HOH
673
5
HOH
HOH
673
A
HOH
674
5
HOH
HOH
674
A
HOH
675
5
HOH
HOH
675
A
HOH
676
5
HOH
HOH
676
A
HOH
677
5
HOH
HOH
677
A
HOH
678
5
HOH
HOH
678
A
HOH
679
5
HOH
HOH
679
A
HOH
680
5
HOH
HOH
680
A
HOH
681
5
HOH
HOH
681
A
HOH
682
5
HOH
HOH
682
A
HOH
683
5
HOH
HOH
683
A
HOH
684
5
HOH
HOH
684
A
HOH
685
5
HOH
HOH
685
A
HOH
686
5
HOH
HOH
686
A
HOH
687
5
HOH
HOH
687
A
HOH
688
5
HOH
HOH
688
A
HOH
689
5
HOH
HOH
689
A
HOH
690
5
HOH
HOH
690
A
HOH
691
5
HOH
HOH
691
A
HOH
692
5
HOH
HOH
692
A
HOH
693
5
HOH
HOH
693
A
HOH
694
5
HOH
HOH
694
A
HOH
695
5
HOH
HOH
695
A
HOH
696
5
HOH
HOH
696
A
HOH
697
5
HOH
HOH
697
A
HOH
698
5
HOH
HOH
698
A
HOH
699
5
HOH
HOH
699
A
n
1
1
A
GLY
2
n
2
GLY
2
A
SER
3
n
3
SER
3
A
LEU
4
n
4
LEU
4
A
ASN
5
n
5
ASN
5
A
CYS
6
n
6
CYS
6
A
ILE
7
n
7
ILE
7
A
VAL
8
n
8
VAL
8
A
ALA
9
n
9
ALA
9
A
VAL
10
n
10
VAL
10
A
SER
11
n
11
SER
11
A
GLN
12
n
12
GLN
12
A
ASN
13
n
13
ASN
13
A
MET
14
n
14
MET
14
A
GLY
15
n
15
GLY
15
A
ILE
16
n
16
ILE
16
A
GLY
17
n
17
GLY
17
A
LYS
18
n
18
LYS
18
A
ASN
19
n
19
ASN
19
A
GLY
20
n
20
GLY
20
A
ASP
21
n
21
ASP
21
A
LEU
22
n
22
LEU
22
A
PRO
23
n
23
PRO
23
A
TRP
24
n
24
TRP
24
A
PRO
25
n
25
PRO
25
A
PRO
26
n
26
PRO
26
A
LEU
27
n
27
LEU
27
A
ARG
28
n
28
ARG
28
A
ASN
29
n
29
ASN
29
A
GLU
30
n
30
GLU
30
A
PHE
31
n
31
PHE
31
A
ARG
32
n
32
ARG
32
A
TYR
33
n
33
TYR
33
A
PHE
34
n
34
PHE
34
A
GLN
35
n
35
GLN
35
A
ARG
36
n
36
ARG
36
A
MET
37
n
37
MET
37
A
THR
38
n
38
THR
38
A
THR
39
n
39
THR
39
A
THR
40
n
40
THR
40
A
SER
41
n
41
SER
41
A
SER
42
n
42
SER
42
A
VAL
43
n
43
VAL
43
A
GLU
44
n
44
GLU
44
A
GLY
45
n
45
GLY
45
A
LYS
46
n
46
LYS
46
A
GLN
47
n
47
GLN
47
A
ASN
48
n
48
ASN
48
A
LEU
49
n
49
LEU
49
A
VAL
50
n
50
VAL
50
A
ILE
51
n
51
ILE
51
A
MET
52
n
52
MET
52
A
GLY
53
n
53
GLY
53
A
LYS
54
n
54
LYS
54
A
LYS
55
n
55
LYS
55
A
THR
56
n
56
THR
56
A
TRP
57
n
57
TRP
57
A
PHE
58
n
58
PHE
58
A
SER
59
n
59
SER
59
A
ILE
60
n
60
ILE
60
A
PRO
61
n
61
PRO
61
A
GLU
62
n
62
GLU
62
A
LYS
63
n
63
LYS
63
A
ASN
64
n
64
ASN
64
A
ARG
65
n
65
ARG
65
A
PRO
66
n
66
PRO
66
A
LEU
67
n
67
LEU
67
A
LYS
68
n
68
LYS
68
A
GLY
69
n
69
GLY
69
A
ARG
70
n
70
ARG
70
A
ILE
71
n
71
ILE
71
A
ASN
72
n
72
ASN
72
A
LEU
73
n
73
LEU
73
A
VAL
74
n
74
VAL
74
A
LEU
75
n
75
LEU
75
A
SER
76
n
76
SER
76
A
ARG
77
n
77
ARG
77
A
GLU
78
n
78
GLU
78
A
LEU
79
n
79
LEU
79
A
LYS
80
n
80
LYS
80
A
GLU
81
n
81
GLU
81
A
PRO
82
n
82
PRO
82
A
PRO
83
n
83
PRO
83
A
GLN
84
n
84
GLN
84
A
GLY
85
n
85
GLY
85
A
ALA
86
n
86
ALA
86
A
HIS
87
n
87
HIS
87
A
PHE
88
n
88
PHE
88
A
LEU
89
n
89
LEU
89
A
SER
90
n
90
SER
90
A
ARG
91
n
91
ARG
91
A
SER
92
n
92
SER
92
A
LEU
93
n
93
LEU
93
A
ASP
94
n
94
ASP
94
A
ASP
95
n
95
ASP
95
A
ALA
96
n
96
ALA
96
A
LEU
97
n
97
LEU
97
A
LYS
98
n
98
LYS
98
A
LEU
99
n
99
LEU
99
A
THR
100
n
100
THR
100
A
GLU
101
n
101
GLU
101
A
GLN
102
n
102
GLN
102
A
PRO
103
n
103
PRO
103
A
GLU
104
n
104
GLU
104
A
LEU
105
n
105
LEU
105
A
ALA
106
n
106
ALA
106
A
ASN
107
n
107
ASN
107
A
LYS
108
n
108
LYS
108
A
VAL
109
n
109
VAL
109
A
ASP
110
n
110
ASP
110
A
MET
111
n
111
MET
111
A
VAL
112
n
112
VAL
112
A
TRP
113
n
113
TRP
113
A
ILE
114
n
114
ILE
114
A
VAL
115
n
115
VAL
115
A
GLY
116
n
116
GLY
116
A
GLY
117
n
117
GLY
117
A
SER
118
n
118
SER
118
A
SER
119
n
119
SER
119
A
VAL
120
n
120
VAL
120
A
TYR
121
n
121
TYR
121
A
LYS
122
n
122
LYS
122
A
GLU
123
n
123
GLU
123
A
ALA
124
n
124
ALA
124
A
MET
125
n
125
MET
125
A
ASN
126
n
126
ASN
126
A
HIS
127
n
127
HIS
127
A
PRO
128
n
128
PRO
128
A
GLY
129
n
129
GLY
129
A
HIS
130
n
130
HIS
130
A
LEU
131
n
131
LEU
131
A
LYS
132
n
132
LYS
132
A
LEU
133
n
133
LEU
133
A
PHE
134
n
134
PHE
134
A
VAL
135
n
135
VAL
135
A
THR
136
n
136
THR
136
A
ARG
137
n
137
ARG
137
A
ILE
138
n
138
ILE
138
A
MET
139
n
139
MET
139
A
GLN
140
n
140
GLN
140
A
ASP
141
n
141
ASP
141
A
PHE
142
n
142
PHE
142
A
GLU
143
n
143
GLU
143
A
SER
144
n
144
SER
144
A
ASP
145
n
145
ASP
145
A
THR
146
n
146
THR
146
A
PHE
147
n
147
PHE
147
A
PHE
148
n
148
PHE
148
A
PRO
149
n
149
PRO
149
A
GLU
150
n
150
GLU
150
A
ILE
151
n
151
ILE
151
A
ASP
152
n
152
ASP
152
A
LEU
153
n
153
LEU
153
A
GLU
154
n
154
GLU
154
A
LYS
155
n
155
LYS
155
A
TYR
156
n
156
TYR
156
A
LYS
157
n
157
LYS
157
A
LEU
158
n
158
LEU
158
A
LEU
159
n
159
LEU
159
A
PRO
160
n
160
PRO
160
A
GLU
161
n
161
GLU
161
A
TYR
162
n
162
TYR
162
A
PRO
163
n
163
PRO
163
A
GLY
164
n
164
GLY
164
A
VAL
165
n
165
VAL
165
A
LEU
166
n
166
LEU
166
A
SER
167
n
167
SER
167
A
ASP
168
n
168
ASP
168
A
VAL
169
n
169
VAL
169
A
GLN
170
n
170
GLN
170
A
GLU
171
n
171
GLU
171
A
GLU
172
n
172
GLU
172
A
LYS
173
n
173
LYS
173
A
GLY
174
n
174
GLY
174
A
ILE
175
n
175
ILE
175
A
LYS
176
n
176
LYS
176
A
TYR
177
n
177
TYR
177
A
LYS
178
n
178
LYS
178
A
PHE
179
n
179
PHE
179
A
GLU
180
n
180
GLU
180
A
VAL
181
n
181
VAL
181
A
TYR
182
n
182
TYR
182
A
GLU
183
n
183
GLU
183
A
LYS
184
n
184
LYS
184
A
ASN
185
n
185
ASN
185
A
ASP
186
n
186
ASP
186
A
0.1226000
0.1306000
0.1618000
0.1726000
3143
3988
5.0
5.0
62954
79411
author_defined_assembly
1
monomeric
1.0000000000
0.0000000000
0.0000000000
0.0000000000
1.0000000000
0.0000000000
0.0000000000
0.0000000000
1.0000000000
1_555
x,y,z
identity operation
0.0000000000
0.0000000000
0.0000000000
A
O
PHE
88
A
O
PHE
88
A
N
VAL
74
A
N
VAL
74
A
O
ILE
71
A
O
ILE
71
A
N
VAL
50
A
N
VAL
50
A
N
LEU
49
A
N
LEU
49
A
O
TRP
113
A
O
TRP
113
A
O
ILE
114
A
O
ILE
114
A
N
ASN
5
A
N
ASN
5
A
N
CYS
6
A
N
CYS
6
A
O
PHE
134
A
O
PHE
134
A
N
ARG
137
A
N
ARG
137
A
O
LYS
178
A
O
LYS
178
A
O
GLU
183
A
O
GLU
183
A
N
LYS
157
A
N
LYS
157
A
O
PHE
88
A
O
PHE
88
A
N
VAL
74
A
N
VAL
74
A
O
ILE
71
A
O
ILE
71
A
N
VAL
50
A
N
VAL
50
A
N
LEU
49
A
N
LEU
49
A
O
TRP
113
A
O
TRP
113
A
O
ILE
114
A
O
ILE
114
A
N
ASN
5
A
N
ASN
5
A
N
CYS
6
A
N
CYS
6
A
O
PHE
134
A
O
PHE
134
A
N
ARG
137
A
N
ARG
137
A
O
LYS
178
A
O
LYS
178
A
O
TYR
177
A
O
TYR
177
A
N
GLN
170
A
N
GLN
170
A
N
GLY
17
A
N
GLY
17
A
O
THR
146
A
O
THR
146
1
A
N
GLY
2
A
N
GLY
2
1
Y
1
A
CA
GLY
2
A
CA
GLY
2
1
Y
1
A
O
GLY
2
A
O
GLY
2
1
Y
1
A
CD
GLU
101
A
CD
GLU
101
1
Y
1
A
OE1
GLU
101
A
OE1
GLU
101
1
Y
1
A
OE2
GLU
101
A
OE2
GLU
101
1
Y
1
A
NE2
GLN
102
A
NE2
GLN
102
1
Y
1
A
CD
GLU
143
A
CD
GLU
143
1
Y
1
A
OE1
GLU
143
A
OE1
GLU
143
1
Y
1
A
OE2
GLU
143
A
OE2
GLU
143
1
Y
1
A
NZ
LYS
173
A
NZ
LYS
173
1
Y
1
A
VAL
1
A
VAL
1
1
Y
1
15.41
2.30
115.30
130.71
A
A
A
CA
CB
CG
LEU
LEU
LEU
4
4
4
N
1
5.41
0.90
118.30
123.71
A
A
A
CB
CG
OD1
ASP
ASP
ASP
21
21
21
N
1
4.64
0.70
120.80
125.44
A
A
A
CB
CG
CD2
PHE
PHE
PHE
31
31
31
N
1
3.39
0.50
120.30
123.69
A
A
A
NE
CZ
NH1
ARG
ARG
ARG
32
32
32
A
A
A
N
1
-4.12
0.50
120.30
116.18
A
A
A
NE
CZ
NH2
ARG
ARG
ARG
32
32
32
A
A
A
N
1
-9.82
1.60
100.20
90.38
A
A
A
CG
SD
CE
MET
MET
MET
37
37
37
N
1
3.55
0.50
120.30
123.85
A
A
A
NE
CZ
NH1
ARG
ARG
ARG
65
65
65
N
1
A
ASP
110
-102.11
-92.78
REFINEMENT IN X-PLOR, ALTERNATED
WITH MANUAL REBUILDING IN O, RESULTING IN A FREE R-FACTOR
OF 24.0%. SRI-9439 WAS THEN ADDED TO THE MODEL IN THE
ACTIVE SITE AND THE CIS PEPTIDE BONDS BETWEEN RESIDUES
ARG-65 AND PRO-66 AND RESIDUES GLY-116 AND GLY-117 BECAME
APPARENT IN 2FO-FC AND FO-FC MAPS. REFINEMENT PROCEEDED
WITH THE ADDITION OF RIDING HYDROGEN ATOMS AND ANISOTROPIC
TEMPERATURE FACTORS IN REFMAC AND ARP, YIELDING A FREE
R-FACTOR OF 19.4%. AT THIS POINT, MOST OF THE SIDE CHAIN
ALTERNATE CONFORMATIONS WERE MODELED. ANISOTROPIC
DISPLACEMENT PARAMETERS WERE REFINED IN SHELXL AND RIDING
HYDROGEN ATOMS WERE ADDED. IN THE FINAL ROUNDS OF
REFINEMENT, RESTRAINTS FOR ALL ATOMS IN SRI-9439
EXCEPT FOR
PLANARITY RESTRAINTS ON THE 5-QUINOLYLAMINO GROUP, AND ALL
NADPH ATOMS EXCEPT FOR THOSE IN THE ADENINE RING AND ADENINE
RIBOSE-2-PHOSPHATE WERE REMOVED, GIVING THE FINAL FREE R-FACTOR
(17.3%). ATTEMPTS TO RESTRAIN THE PLANARITY OF THE
5-METHYL-5-DEAZAPTERIDINE MOIETY OF SRI-9439 RESULTED
IN LARGE DIFFERENCE ELECTRON DENSITY PEAKS FOR THE
EXOCYCLIC N4 AND C5A ATOMS, CONFIRMING THEIR OUT-OF-PLANE
POSITIONS.
0.1726000
0.1306000
1.09
20.00
18984
3988
79411
79411
23468
5.0
99.6
5% OF THE REFLECTIONS WERE RANDOMLY SELECTED FOR THE TEST SET.
1
THROUGHOUT
0.0
0.0
MOLECULAR REPLACEMENT
UNPUBLISHED HUMAN DHFR STRUCTURE.
ENGH & HUBER
MOEWS & KRETSINGER, J.MOL.BIOL.91(1973)201-228
66
1406.12
1927.22
1.09
20.00
399
2088
83
0
1606
0.013
0.032
0.000
0.0293
0.076
0.086
0.023
0.005
0.050
0.098
10.8
1.090
20.00
1KMS
79611
79611
0.000
0.000
0.0470000
0.0470000
1
9.4
3.6
99.6
0.4220000
1.09
1.15
2.3
0.4220000
3.3
99.1
phasing
AMoRE
refinement
SHELXL-97
data reduction
MOSFLM
data scaling
CCP4
(SCALA)
HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH NADPH AND 6-([5-QUINOLYLAMINO]METHYL)-2,4-DIAMINO-5-METHYLPYRIDO[2,3-D]PYRIMIDINE (SRI-9439), A LIPOPHILIC ANTIFOLATE
1
N
N
2
N
N
2
N
N
3
N
N
4
N
N
5
N
N
A
LEU
27
A
LEU
27
HELX_P
A
THR
40
A
THR
40
1
1
14
A
LYS
54
A
LYS
54
HELX_P
A
ILE
60
A
ILE
60
1
2
7
A
PRO
61
A
PRO
61
HELX_P
A
ARG
65
A
ARG
65
5
3
5
A
SER
92
A
SER
92
HELX_P
A
GLU
101
A
GLU
101
1
4
10
A
GLY
117
A
GLY
117
HELX_P
A
ASN
126
A
ASN
126
1
5
10
OXIDOREDUCTASE
OXIDOREDUCTASE, ANTIPARASITIC DRUGS, REDUCTASE, LIPOPHILIC ANTIFOLATES
A
ARG
65
A
ARG
65
1
A
PRO
66
A
PRO
66
-5.49
A
GLY
116
A
GLY
116
1
A
GLY
117
A
GLY
117
4.45
DYR_HUMAN
UNP
1
1
P00374
VGSLNCIVAVSQNMGIGKNGDLPWPPLRNEFRYFQRMTTTSSVEGKQNLVIMGKKTWFSIPEKNRPLKGRINLVLSRELK
EPPQGAHFLSRSLDDALKLTEQPELANKVDMVWIVGGSSVYKEAMNHPGHLKLFVTRIMQDFESDTFFPEIDLEKYKLLP
EYPGVLSDVQEEKGIKYKFEVYEKND
1
186
1KMS
1
186
P00374
A
1
1
186
8
8
2
parallel
parallel
parallel
parallel
parallel
anti-parallel
anti-parallel
parallel
parallel
parallel
parallel
parallel
anti-parallel
anti-parallel
anti-parallel
A
PHE
88
A
PHE
88
A
SER
90
A
SER
90
A
ILE
71
A
ILE
71
A
LEU
75
A
LEU
75
A
GLN
47
A
GLN
47
A
GLY
53
A
GLY
53
A
VAL
109
A
VAL
109
A
ILE
114
A
ILE
114
A
LEU
4
A
LEU
4
A
VAL
10
A
VAL
10
A
LEU
131
A
LEU
131
A
ILE
138
A
ILE
138
A
ILE
175
A
ILE
175
A
LYS
184
A
LYS
184
A
TYR
156
A
TYR
156
A
LEU
158
A
LEU
158
A
PHE
88
A
PHE
88
A
SER
90
A
SER
90
A
ILE
71
A
ILE
71
A
LEU
75
A
LEU
75
A
GLN
47
A
GLN
47
A
GLY
53
A
GLY
53
A
VAL
109
A
VAL
109
A
ILE
114
A
ILE
114
A
LEU
4
A
LEU
4
A
VAL
10
A
VAL
10
A
LEU
131
A
LEU
131
A
ILE
138
A
ILE
138
A
ILE
175
A
ILE
175
A
LYS
184
A
LYS
184
A
GLN
170
A
GLN
170
A
GLU
172
A
GLU
172
A
GLY
15
A
GLY
15
A
GLY
17
A
GLY
17
A
THR
146
A
THR
146
A
PHE
147
A
PHE
147
BINDING SITE FOR RESIDUE SO4 A 203
A
SO4
203
Software
4
BINDING SITE FOR RESIDUE SO4 A 204
A
SO4
204
Software
7
BINDING SITE FOR RESIDUE LIH A 201
A
LIH
201
Software
12
BINDING SITE FOR RESIDUE NDP A 202
A
NDP
202
Software
38
A
PRO
61
A
PRO
61
4
1_555
A
GLU
62
A
GLU
62
4
1_555
A
HOH
500
F
HOH
4
1_555
A
HOH
524
F
HOH
4
1_555
A
ARG
28
A
ARG
28
7
4_556
A
LYS
68
A
LYS
68
7
1_555
A
GLY
69
A
GLY
69
7
1_555
A
HOH
375
F
HOH
7
1_555
A
HOH
608
F
HOH
7
1_555
A
HOH
658
F
HOH
7
4_556
A
HOH
695
F
HOH
7
1_555
A
ILE
7
A
ILE
7
12
1_555
A
VAL
8
A
VAL
8
12
1_555
A
GLU
30
A
GLU
30
12
1_555
A
PHE
31
A
PHE
31
12
1_555
A
PHE
34
A
PHE
34
12
1_555
A
PRO
61
A
PRO
61
12
1_555
A
VAL
115
A
VAL
115
12
1_555
A
TYR
121
A
TYR
121
12
1_555
A
NDP
202
E
NDP
12
1_555
A
HOH
302
F
HOH
12
1_555
A
HOH
343
F
HOH
12
1_555
A
HOH
401
F
HOH
12
1_555
A
VAL
8
A
VAL
8
38
1_555
A
ALA
9
A
ALA
9
38
1_555
A
ILE
16
A
ILE
16
38
1_555
A
GLY
17
A
GLY
17
38
1_555
A
LYS
18
A
LYS
18
38
1_555
A
GLY
20
A
GLY
20
38
1_555
A
ASP
21
A
ASP
21
38
1_555
A
LEU
22
A
LEU
22
38
1_555
A
TRP
24
A
TRP
24
38
1_555
A
GLY
53
A
GLY
53
38
1_555
A
LYS
54
A
LYS
54
38
1_555
A
LYS
55
A
LYS
55
38
1_555
A
THR
56
A
THR
56
38
1_555
A
LEU
75
A
LEU
75
38
1_555
A
SER
76
A
SER
76
38
1_555
A
ARG
77
A
ARG
77
38
1_555
A
GLU
78
A
GLU
78
38
1_555
A
ARG
91
A
ARG
91
38
1_555
A
LYS
98
A
LYS
98
38
4_466
A
VAL
115
A
VAL
115
38
1_555
A
GLY
117
A
GLY
117
38
1_555
A
SER
118
A
SER
118
38
1_555
A
SER
119
A
SER
119
38
1_555
A
VAL
120
A
VAL
120
38
1_555
A
TYR
121
A
TYR
121
38
1_555
A
GLU
123
A
GLU
123
38
1_555
A
THR
146
A
THR
146
38
1_555
A
LIH
201
D
LIH
38
1_555
A
HOH
317
F
HOH
38
1_555
A
HOH
339
F
HOH
38
1_555
A
HOH
389
F
HOH
38
1_555
A
HOH
400
F
HOH
38
1_555
A
HOH
401
F
HOH
38
1_555
A
HOH
435
F
HOH
38
1_555
A
HOH
581
F
HOH
38
1_555
A
HOH
584
F
HOH
38
1_555
A
HOH
643
F
HOH
38
1_555
A
HOH
689
F
HOH
38
1_555
19
P 21 21 21