0.011441
0.000000
0.000000
0.000000
0.011374
0.000000
0.000000
0.000000
0.010823
0.00000
0.00000
0.00000
Buchini, S.
Gallat, F.-X.
Greig, I.R.
Kim, J.-H.
Wakatsuki, S.
Chavas, L.M.G.
Withers, S.G.
http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic
8
90.00
90.00
90.00
87.408
87.916
92.394
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
C11 H18 F N O9
327.260
n
5-acetamido-3,5-dideoxy-3-fluoro-D-erythro-alpha-L-manno-non-2-ulopyranosonic acid
5-(acetylamino)-3,5-dideoxy-3-fluoro-D-erythro-alpha-L-manno-non-2-ulopyranosonic acid; 3-FLUOROSIALIC ACID; 5-acetamido-3,5-dideoxy-3-fluoro-D-erythro-alpha-L-manno-non-2-ulosonic acid; 5-acetamido-3,5-dideoxy-3-fluoro-D-erythro-L-manno-non-2-ulosonic acid; 5-acetamido-3,5-dideoxy-3-fluoro-D-erythro-manno-non-2-ulosonic acid
D-saccharide, beta 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
C6 H15 N2 O2 1
147.195
y
LYSINE
L-peptide linking
C5 H11 N O2 S
149.211
y
METHIONINE
L-peptide linking
C9 H11 N O2
165.189
y
PHENYLALANINE
L-peptide linking
O4 P -3
94.971
PHOSPHATE ION
non-polymer
C5 H9 N O2
115.130
y
PROLINE
L-peptide linking
C3 H7 N O3
105.093
y
SERINE
L-peptide linking
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
O
N
89
N
C
N
90
N
F
N
91
R
C
N
92
R
C
N
93
R
C
N
94
N
O
N
95
R
C
N
96
N
N
N
97
R
C
N
98
N
O
N
99
R
C
N
100
N
O
N
101
R
C
N
102
N
O
N
103
N
C
N
104
N
O
N
105
N
C
N
106
N
O
N
107
N
C
N
108
N
O
N
109
N
O
N
110
N
H
N
111
N
H
N
112
N
H
N
113
N
H
N
114
N
H
N
115
N
H
N
116
N
H
N
117
N
H
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
H
N
128
N
N
N
129
S
C
N
130
N
C
N
131
N
O
N
132
N
C
N
133
N
C
N
134
N
C
N
135
N
O
N
136
N
N
N
137
N
O
N
138
N
H
N
139
N
H
N
140
N
H
N
141
N
H
N
142
N
H
N
143
N
H
N
144
N
H
N
145
N
H
N
146
N
H
N
147
N
H
N
148
N
N
N
149
S
C
N
150
N
C
N
151
N
O
N
152
N
C
N
153
N
C
N
154
N
C
N
155
N
O
N
156
N
O
N
157
N
O
N
158
N
H
N
159
N
H
N
160
N
H
N
161
N
H
N
162
N
H
N
163
N
H
N
164
N
H
N
165
N
H
N
166
N
H
N
167
N
N
N
168
N
C
N
169
N
C
N
170
N
O
N
171
N
O
N
172
N
H
N
173
N
H
N
174
N
H
N
175
N
H
N
176
N
H
N
177
N
N
N
178
S
C
N
179
N
C
N
180
N
O
N
181
N
C
Y
182
N
C
Y
183
N
N
Y
184
N
C
Y
185
N
C
Y
186
N
N
N
187
N
O
N
188
N
H
N
189
N
H
N
190
N
H
N
191
N
H
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
O
N
199
N
H
N
200
N
H
N
201
N
N
N
202
S
C
N
203
N
C
N
204
N
O
N
205
S
C
N
206
N
C
N
207
N
C
N
208
N
C
N
209
N
O
N
210
N
H
N
211
N
H
N
212
N
H
N
213
N
H
N
214
N
H
N
215
N
H
N
216
N
H
N
217
N
H
N
218
N
H
N
219
N
H
N
220
N
H
N
221
N
H
N
222
N
H
N
223
N
N
N
224
S
C
N
225
N
C
N
226
N
O
N
227
N
C
N
228
N
C
N
229
N
C
N
230
N
C
N
231
N
O
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
N
N
246
S
C
N
247
N
C
N
248
N
O
N
249
N
C
N
250
N
C
N
251
N
C
N
252
N
C
N
253
N
N
N
254
N
O
N
255
N
H
N
256
N
H
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
N
N
271
S
C
N
272
N
C
N
273
N
O
N
274
N
C
N
275
N
C
N
276
N
S
N
277
N
C
N
278
N
O
N
279
N
H
N
280
N
H
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
N
N
291
S
C
N
292
N
C
N
293
N
O
N
294
N
C
Y
295
N
C
Y
296
N
C
Y
297
N
C
Y
298
N
C
Y
299
N
C
Y
300
N
C
N
301
N
O
N
302
N
H
N
303
N
H
N
304
N
H
N
305
N
H
N
306
N
H
N
307
N
H
N
308
N
H
N
309
N
H
N
310
N
H
N
311
N
H
N
312
N
H
N
313
N
P
N
314
N
O
N
315
N
O
N
316
N
O
N
317
N
O
N
318
N
N
N
319
S
C
N
320
N
C
N
321
N
O
N
322
N
C
N
323
N
C
N
324
N
C
N
325
N
O
N
326
N
H
N
327
N
H
N
328
N
H
N
329
N
H
N
330
N
H
N
331
N
H
N
332
N
H
N
333
N
H
N
334
N
H
N
335
N
N
N
336
S
C
N
337
N
C
N
338
N
O
N
339
N
C
N
340
N
O
N
341
N
O
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
N
N
350
S
C
N
351
N
C
N
352
N
O
N
353
R
C
N
354
N
O
N
355
N
C
N
356
N
O
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
N
N
367
S
C
N
368
N
C
N
369
N
O
N
370
N
C
Y
371
N
C
Y
372
N
C
Y
373
N
C
Y
374
N
N
Y
375
N
C
Y
376
N
C
Y
377
N
C
Y
378
N
C
Y
379
N
C
N
380
N
O
N
381
N
H
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
Y
398
N
C
Y
399
N
C
Y
400
N
C
Y
401
N
C
Y
402
N
C
Y
403
N
C
N
404
N
O
N
405
N
O
N
406
N
H
N
407
N
H
N
408
N
H
N
409
N
H
N
410
N
H
N
411
N
H
N
412
N
H
N
413
N
H
N
414
N
H
N
415
N
H
N
416
N
H
N
417
N
N
N
418
S
C
N
419
N
C
N
420
N
O
N
421
N
C
N
422
N
C
N
423
N
C
N
424
N
O
N
425
N
H
N
426
N
H
N
427
N
H
N
428
N
H
N
429
N
H
N
430
N
H
N
431
N
H
N
432
N
H
N
433
N
H
N
434
N
H
N
435
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
doub
N
86
N
sing
N
87
N
sing
N
88
N
sing
N
89
N
sing
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
sing
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
sing
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
sing
N
117
N
doub
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
sing
N
127
N
sing
N
128
N
sing
N
129
N
doub
N
130
N
sing
N
131
N
sing
N
132
N
sing
N
133
N
sing
N
134
N
sing
N
135
N
sing
N
136
N
sing
N
137
N
doub
N
138
N
sing
N
139
N
sing
N
140
N
sing
N
141
N
sing
N
142
N
sing
N
143
N
sing
N
144
N
sing
N
145
N
sing
N
146
N
sing
N
147
N
sing
N
148
N
doub
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
doub
N
157
N
sing
N
158
N
sing
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
doub
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
doub
N
176
N
sing
N
177
N
sing
N
178
N
sing
N
179
N
sing
Y
180
N
sing
Y
181
N
doub
Y
182
N
doub
N
183
N
sing
Y
184
N
sing
N
185
N
sing
Y
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
N
194
N
sing
N
195
N
sing
N
196
N
sing
N
197
N
sing
N
198
N
doub
N
199
N
sing
N
200
N
sing
N
201
N
sing
N
202
N
sing
N
203
N
sing
N
204
N
sing
N
205
N
sing
N
206
N
sing
N
207
N
sing
N
208
N
sing
N
209
N
sing
N
210
N
sing
N
211
N
sing
N
212
N
sing
N
213
N
sing
N
214
N
sing
N
215
N
sing
N
216
N
sing
N
217
N
sing
N
218
N
sing
N
219
N
doub
N
220
N
sing
N
221
N
sing
N
222
N
sing
N
223
N
sing
N
224
N
sing
N
225
N
sing
N
226
N
sing
N
227
N
sing
N
228
N
sing
N
229
N
sing
N
230
N
sing
N
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
doub
N
241
N
sing
N
242
N
sing
N
243
N
sing
N
244
N
sing
N
245
N
sing
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
doub
N
265
N
sing
N
266
N
sing
N
267
N
sing
N
268
N
sing
N
269
N
sing
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
sing
N
283
N
doub
N
284
N
sing
N
285
N
sing
N
286
N
sing
N
287
N
sing
Y
288
N
doub
Y
289
N
sing
Y
290
N
sing
N
291
N
sing
Y
292
N
doub
N
293
N
sing
Y
294
N
doub
N
295
N
sing
Y
296
N
sing
N
297
N
sing
N
298
N
sing
N
299
N
sing
N
300
N
doub
N
301
N
sing
N
302
N
sing
N
303
N
sing
N
304
N
sing
N
305
N
sing
N
306
N
sing
N
307
N
sing
N
308
N
sing
N
309
N
sing
N
310
N
doub
N
311
N
sing
N
312
N
sing
N
313
N
sing
N
314
N
sing
N
315
N
sing
N
316
N
sing
N
317
N
sing
N
318
N
sing
N
319
N
sing
N
320
N
sing
N
321
N
sing
N
322
N
sing
N
323
N
sing
N
324
N
sing
N
325
N
sing
N
326
N
sing
N
327
N
doub
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
doub
N
341
N
sing
N
342
N
sing
N
343
N
sing
N
344
N
sing
N
345
N
sing
N
346
N
sing
N
347
N
sing
N
348
N
sing
N
349
N
sing
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
sing
N
360
N
sing
Y
361
N
doub
Y
362
N
sing
Y
363
N
sing
N
364
N
sing
Y
365
N
doub
Y
366
N
sing
Y
367
N
sing
N
368
N
sing
Y
369
N
sing
Y
370
N
doub
N
371
N
sing
Y
372
N
doub
N
373
N
sing
Y
374
N
sing
N
375
N
sing
N
376
N
sing
N
377
N
sing
N
378
N
sing
N
379
N
sing
N
380
N
sing
N
381
N
sing
N
382
N
sing
N
383
N
sing
N
384
N
doub
N
385
N
sing
N
386
N
sing
N
387
N
sing
N
388
N
sing
Y
389
N
doub
Y
390
N
sing
Y
391
N
sing
N
392
N
sing
Y
393
N
doub
N
394
N
sing
Y
395
N
doub
N
396
N
sing
Y
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
doub
N
409
N
sing
N
410
N
sing
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
sing
N
418
N
sing
N
419
N
sing
GE
Angew.Chem.Int.Ed.Engl.
9999
1433-7851
53
3382
3386
10.1002/anie.201309675
24591206
Tuning mechanism-based inactivators of neuraminidases: mechanistic and structural insights.
2014
10.2210/pdb4nc5/pdb
pdb_00004nc5
1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
1.000000
0.00000
0.00000
0.00000
100
1
CCD
2010-11-09
ADSC QUANTUM 210r
SI(111)
SINGLE WAVELENGTH
M
x-ray
1
1
1.0
AR-NW12A
Photon Factory
1
SYNCHROTRON
PHOTON FACTORY BEAMLINE AR-NW12A
42375.586
Sialidase-2
3.2.1.18
D46A,H168N
1
man
polymer
327.260
5-acetamido-3,5-dideoxy-3-fluoro-D-erythro-alpha-L-manno-non-2-ulopyranosonic acid
1
man
non-polymer
94.971
PHOSPHATE ION
2
syn
non-polymer
18.015
water
103
nat
water
NEU2, Cytosolic sialidase, N-acetyl-alpha-neuraminidase 2
no
no
GSMASLPVLQKESVFQSGAHAYRIPALLYLPGQQSLLAFAEQRASKKAEHAELIVLRRGDYDAPTHQVQWQAQEVVAQAR
LDGHRSMNPCPLYDAQTGTLFLFFIAIPGQVTEQQQLQTRANVTRLCQVTSTDHGRTWSSPRDLTDAAIGPAYREWSTFA
VGPGHCLQLNDRARSLVVPAYAYRKLHPIQRPIPSAFCFLSHDHGRTWARGHFVAQDTLECQVAEVETGEQRVVTLNARS
HLRARVQAQSTNDGLDFQESQLVKKLVEPPPQGCQGSVISFPSPRSGPGSPAQWLLYTHPTHSWQRADLGAYLNPRPPAP
EAWSEPVLLAKGSCAYSDLQSMGTGPDGSPLFGCLYEANDYEEIVFLMFTLKQAFPAEYLPQ
GSMASLPVLQKESVFQSGAHAYRIPALLYLPGQQSLLAFAEQRASKKAEHAELIVLRRGDYDAPTHQVQWQAQEVVAQAR
LDGHRSMNPCPLYDAQTGTLFLFFIAIPGQVTEQQQLQTRANVTRLCQVTSTDHGRTWSSPRDLTDAAIGPAYREWSTFA
VGPGHCLQLNDRARSLVVPAYAYRKLHPIQRPIPSAFCFLSHDHGRTWARGHFVAQDTLECQVAEVETGEQRVVTLNARS
HLRARVQAQSTNDGLDFQESQLVKKLVEPPPQGCQGSVISFPSPRSGPGSPAQWLLYTHPTHSWQRADLGAYLNPRPPAP
EAWSEPVLLAKGSCAYSDLQSMGTGPDGSPLFGCLYEANDYEEIVFLMFTLKQAFPAEYLPQ
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
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
n
n
n
n
n
n
n
n
n
n
human
sample
NEU2
9606
Homo sapiens
562
Escherichia coli
BL21
PLASMID
PGEX-2T
1
2.09
41.21
VAPOR DIFFUSION, HANGING DROP
8
SODIUM/POTASSIUM PHOSPHATE BUFFER, pH 8, VAPOR DIFFUSION, HANGING DROP, temperature 289K
289
software
chem_comp
entity
pdbx_chem_comp_identifier
pdbx_entity_nonpoly
struct_conn
struct_ref_seq_dif
struct_site
struct_site_gen
chem_comp
chem_comp_atom
chem_comp_bond
database_2
pdbx_initial_refinement_model
repository
Initial release
Carbohydrate remediation
repository
Remediation
Database references
Refinement description
Data collection
Database references
Derived calculations
Structure summary
Data collection
Database references
Refinement description
Structure summary
1
0
2013-11-06
1
1
2014-04-02
1
2
2017-11-15
1
3
2020-07-29
1
4
2023-09-20
_chem_comp.mon_nstd_flag
_chem_comp.name
_chem_comp.type
_entity.pdbx_description
_pdbx_entity_nonpoly.name
_struct_conn.pdbx_leaving_atom_flag
_struct_ref_seq_dif.details
_chem_comp.pdbx_synonyms
_database_2.pdbx_DOI
_database_2.pdbx_database_accession
b-D-Neup5Ac3fluoro
Trypanosoma rangeli Sialidase In Complex With 2,3- Difluorosialic Acid (Covalent Intermediate)
Crystal structure of Trypanosoma cruzi trans-sialidase in complex with 2,3-difluorosialic acid (covalent intermediate)
RCSB
Y
RCSB
2013-10-24
REL
REL
FSI
5-acetamido-3,5-dideoxy-3-fluoro-D-erythro-alpha-L-manno-non-2-ulopyranosonic acid
PO4
PHOSPHATE ION
HOH
water
1VCU
PDB ENTRY 1VCU
PDB
experimental model
FSI
400
2
FSI
FSI
401
A
PO4
1
3
PO4
PO4
402
A
PO4
2
3
PO4
PO4
403
A
HOH
1
4
HOH
HOH
501
A
HOH
2
4
HOH
HOH
502
A
HOH
3
4
HOH
HOH
503
A
HOH
4
4
HOH
HOH
504
A
HOH
5
4
HOH
HOH
505
A
HOH
6
4
HOH
HOH
506
A
HOH
7
4
HOH
HOH
507
A
HOH
8
4
HOH
HOH
508
A
HOH
9
4
HOH
HOH
509
A
HOH
10
4
HOH
HOH
510
A
HOH
11
4
HOH
HOH
511
A
HOH
12
4
HOH
HOH
512
A
HOH
13
4
HOH
HOH
513
A
HOH
14
4
HOH
HOH
514
A
HOH
15
4
HOH
HOH
515
A
HOH
16
4
HOH
HOH
516
A
HOH
17
4
HOH
HOH
517
A
HOH
18
4
HOH
HOH
518
A
HOH
19
4
HOH
HOH
519
A
HOH
20
4
HOH
HOH
520
A
HOH
21
4
HOH
HOH
521
A
HOH
22
4
HOH
HOH
522
A
HOH
23
4
HOH
HOH
523
A
HOH
24
4
HOH
HOH
524
A
HOH
25
4
HOH
HOH
525
A
HOH
26
4
HOH
HOH
526
A
HOH
27
4
HOH
HOH
527
A
HOH
28
4
HOH
HOH
528
A
HOH
29
4
HOH
HOH
529
A
HOH
30
4
HOH
HOH
530
A
HOH
31
4
HOH
HOH
531
A
HOH
32
4
HOH
HOH
532
A
HOH
33
4
HOH
HOH
533
A
HOH
34
4
HOH
HOH
534
A
HOH
35
4
HOH
HOH
535
A
HOH
36
4
HOH
HOH
536
A
HOH
37
4
HOH
HOH
537
A
HOH
38
4
HOH
HOH
538
A
HOH
39
4
HOH
HOH
539
A
HOH
40
4
HOH
HOH
540
A
HOH
41
4
HOH
HOH
541
A
HOH
42
4
HOH
HOH
542
A
HOH
43
4
HOH
HOH
543
A
HOH
44
4
HOH
HOH
544
A
HOH
45
4
HOH
HOH
545
A
HOH
46
4
HOH
HOH
546
A
HOH
47
4
HOH
HOH
547
A
HOH
48
4
HOH
HOH
548
A
HOH
49
4
HOH
HOH
549
A
HOH
50
4
HOH
HOH
550
A
HOH
51
4
HOH
HOH
551
A
HOH
52
4
HOH
HOH
552
A
HOH
53
4
HOH
HOH
553
A
HOH
54
4
HOH
HOH
554
A
HOH
55
4
HOH
HOH
555
A
HOH
56
4
HOH
HOH
556
A
HOH
57
4
HOH
HOH
557
A
HOH
58
4
HOH
HOH
558
A
HOH
59
4
HOH
HOH
559
A
HOH
60
4
HOH
HOH
560
A
HOH
61
4
HOH
HOH
561
A
HOH
62
4
HOH
HOH
562
A
HOH
63
4
HOH
HOH
563
A
HOH
64
4
HOH
HOH
564
A
HOH
65
4
HOH
HOH
565
A
HOH
66
4
HOH
HOH
566
A
HOH
67
4
HOH
HOH
567
A
HOH
68
4
HOH
HOH
568
A
HOH
69
4
HOH
HOH
569
A
HOH
70
4
HOH
HOH
570
A
HOH
71
4
HOH
HOH
571
A
HOH
72
4
HOH
HOH
572
A
HOH
73
4
HOH
HOH
573
A
HOH
74
4
HOH
HOH
574
A
HOH
75
4
HOH
HOH
575
A
HOH
76
4
HOH
HOH
576
A
HOH
77
4
HOH
HOH
577
A
HOH
78
4
HOH
HOH
578
A
HOH
79
4
HOH
HOH
579
A
HOH
80
4
HOH
HOH
580
A
HOH
81
4
HOH
HOH
581
A
HOH
82
4
HOH
HOH
582
A
HOH
83
4
HOH
HOH
583
A
HOH
84
4
HOH
HOH
584
A
HOH
85
4
HOH
HOH
585
A
HOH
87
4
HOH
HOH
586
A
HOH
88
4
HOH
HOH
587
A
HOH
89
4
HOH
HOH
588
A
HOH
90
4
HOH
HOH
589
A
HOH
91
4
HOH
HOH
590
A
HOH
92
4
HOH
HOH
591
A
HOH
94
4
HOH
HOH
592
A
HOH
95
4
HOH
HOH
593
A
HOH
96
4
HOH
HOH
594
A
HOH
97
4
HOH
HOH
595
A
HOH
98
4
HOH
HOH
596
A
HOH
99
4
HOH
HOH
597
A
HOH
100
4
HOH
HOH
598
A
HOH
105
4
HOH
HOH
599
A
HOH
106
4
HOH
HOH
600
A
HOH
110
4
HOH
HOH
601
A
HOH
112
4
HOH
HOH
602
A
HOH
113
4
HOH
HOH
603
A
n
1
-1
A
n
2
0
A
n
3
1
A
n
4
2
A
SER
3
n
5
SER
3
A
LEU
4
n
6
LEU
4
A
PRO
5
n
7
PRO
5
A
VAL
6
n
8
VAL
6
A
LEU
7
n
9
LEU
7
A
GLN
8
n
10
GLN
8
A
LYS
9
n
11
LYS
9
A
GLU
10
n
12
GLU
10
A
SER
11
n
13
SER
11
A
VAL
12
n
14
VAL
12
A
PHE
13
n
15
PHE
13
A
GLN
14
n
16
GLN
14
A
SER
15
n
17
SER
15
A
GLY
16
n
18
GLY
16
A
ALA
17
n
19
ALA
17
A
HIS
18
n
20
HIS
18
A
ALA
19
n
21
ALA
19
A
TYR
20
n
22
TYR
20
A
ARG
21
n
23
ARG
21
A
ILE
22
n
24
ILE
22
A
PRO
23
n
25
PRO
23
A
ALA
24
n
26
ALA
24
A
LEU
25
n
27
LEU
25
A
LEU
26
n
28
LEU
26
A
TYR
27
n
29
TYR
27
A
LEU
28
n
30
LEU
28
A
PRO
29
n
31
PRO
29
A
GLY
30
n
32
GLY
30
A
GLN
31
n
33
GLN
31
A
GLN
32
n
34
GLN
32
A
SER
33
n
35
SER
33
A
LEU
34
n
36
LEU
34
A
LEU
35
n
37
LEU
35
A
ALA
36
n
38
ALA
36
A
PHE
37
n
39
PHE
37
A
ALA
38
n
40
ALA
38
A
GLU
39
n
41
GLU
39
A
GLN
40
n
42
GLN
40
A
ARG
41
n
43
ARG
41
A
ALA
42
n
44
ALA
42
A
n
45
43
A
n
46
44
A
n
47
45
A
n
48
46
A
n
49
47
A
n
50
48
A
ALA
49
n
51
ALA
49
A
GLU
50
n
52
GLU
50
A
LEU
51
n
53
LEU
51
A
ILE
52
n
54
ILE
52
A
VAL
53
n
55
VAL
53
A
LEU
54
n
56
LEU
54
A
ARG
55
n
57
ARG
55
A
ARG
56
n
58
ARG
56
A
GLY
57
n
59
GLY
57
A
ASP
58
n
60
ASP
58
A
TYR
59
n
61
TYR
59
A
ASP
60
n
62
ASP
60
A
ALA
61
n
63
ALA
61
A
PRO
62
n
64
PRO
62
A
THR
63
n
65
THR
63
A
HIS
64
n
66
HIS
64
A
GLN
65
n
67
GLN
65
A
VAL
66
n
68
VAL
66
A
GLN
67
n
69
GLN
67
A
TRP
68
n
70
TRP
68
A
GLN
69
n
71
GLN
69
A
ALA
70
n
72
ALA
70
A
GLN
71
n
73
GLN
71
A
GLU
72
n
74
GLU
72
A
VAL
73
n
75
VAL
73
A
VAL
74
n
76
VAL
74
A
ALA
75
n
77
ALA
75
A
GLN
76
n
78
GLN
76
A
ALA
77
n
79
ALA
77
A
ARG
78
n
80
ARG
78
A
LEU
79
n
81
LEU
79
A
ASP
80
n
82
ASP
80
A
GLY
81
n
83
GLY
81
A
HIS
82
n
84
HIS
82
A
ARG
83
n
85
ARG
83
A
SER
84
n
86
SER
84
A
MET
85
n
87
MET
85
A
ASN
86
n
88
ASN
86
A
PRO
87
n
89
PRO
87
A
CYS
88
n
90
CYS
88
A
PRO
89
n
91
PRO
89
A
LEU
90
n
92
LEU
90
A
TYR
91
n
93
TYR
91
A
ASP
92
n
94
ASP
92
A
ALA
93
n
95
ALA
93
A
GLN
94
n
96
GLN
94
A
THR
95
n
97
THR
95
A
GLY
96
n
98
GLY
96
A
THR
97
n
99
THR
97
A
LEU
98
n
100
LEU
98
A
PHE
99
n
101
PHE
99
A
LEU
100
n
102
LEU
100
A
PHE
101
n
103
PHE
101
A
PHE
102
n
104
PHE
102
A
ILE
103
n
105
ILE
103
A
ALA
104
n
106
ALA
104
A
ILE
105
n
107
ILE
105
A
PRO
106
n
108
PRO
106
A
GLY
107
n
109
GLY
107
A
GLN
108
n
110
GLN
108
A
VAL
109
n
111
VAL
109
A
n
112
110
A
n
113
111
A
n
114
112
A
n
115
113
A
n
116
114
A
n
117
115
A
n
118
116
A
n
119
117
A
ARG
118
n
120
ARG
118
A
ALA
119
n
121
ALA
119
A
ASN
120
n
122
ASN
120
A
VAL
121
n
123
VAL
121
A
THR
122
n
124
THR
122
A
ARG
123
n
125
ARG
123
A
LEU
124
n
126
LEU
124
A
CYS
125
n
127
CYS
125
A
GLN
126
n
128
GLN
126
A
VAL
127
n
129
VAL
127
A
THR
128
n
130
THR
128
A
SER
129
n
131
SER
129
A
THR
130
n
132
THR
130
A
ASP
131
n
133
ASP
131
A
HIS
132
n
134
HIS
132
A
GLY
133
n
135
GLY
133
A
ARG
134
n
136
ARG
134
A
THR
135
n
137
THR
135
A
TRP
136
n
138
TRP
136
A
SER
137
n
139
SER
137
A
SER
138
n
140
SER
138
A
PRO
139
n
141
PRO
139
A
ARG
140
n
142
ARG
140
A
ASP
141
n
143
ASP
141
A
LEU
142
n
144
LEU
142
A
THR
143
n
145
THR
143
A
ASP
144
n
146
ASP
144
A
ALA
145
n
147
ALA
145
A
ALA
146
n
148
ALA
146
A
ILE
147
n
149
ILE
147
A
GLY
148
n
150
GLY
148
A
PRO
149
n
151
PRO
149
A
ALA
150
n
152
ALA
150
A
TYR
151
n
153
TYR
151
A
ARG
152
n
154
ARG
152
A
GLU
153
n
155
GLU
153
A
TRP
154
n
156
TRP
154
A
SER
155
n
157
SER
155
A
THR
156
n
158
THR
156
A
PHE
157
n
159
PHE
157
A
ALA
158
n
160
ALA
158
A
VAL
159
n
161
VAL
159
A
GLY
160
n
162
GLY
160
A
PRO
161
n
163
PRO
161
A
GLY
162
n
164
GLY
162
A
HIS
163
n
165
HIS
163
A
CYS
164
n
166
CYS
164
A
LEU
165
n
167
LEU
165
A
GLN
166
n
168
GLN
166
A
LEU
167
n
169
LEU
167
A
ASN
168
n
170
ASN
168
A
ASP
169
n
171
ASP
169
A
ARG
170
n
172
ARG
170
A
ALA
171
n
173
ALA
171
A
ARG
172
n
174
ARG
172
A
SER
173
n
175
SER
173
A
LEU
174
n
176
LEU
174
A
VAL
175
n
177
VAL
175
A
VAL
176
n
178
VAL
176
A
PRO
177
n
179
PRO
177
A
ALA
178
n
180
ALA
178
A
TYR
179
n
181
TYR
179
A
ALA
180
n
182
ALA
180
A
TYR
181
n
183
TYR
181
A
ARG
182
n
184
ARG
182
A
LYS
183
n
185
LYS
183
A
LEU
184
n
186
LEU
184
A
HIS
185
n
187
HIS
185
A
PRO
186
n
188
PRO
186
A
ILE
187
n
189
ILE
187
A
GLN
188
n
190
GLN
188
A
ARG
189
n
191
ARG
189
A
PRO
190
n
192
PRO
190
A
ILE
191
n
193
ILE
191
A
PRO
192
n
194
PRO
192
A
SER
193
n
195
SER
193
A
ALA
194
n
196
ALA
194
A
PHE
195
n
197
PHE
195
A
CYS
196
n
198
CYS
196
A
PHE
197
n
199
PHE
197
A
LEU
198
n
200
LEU
198
A
SER
199
n
201
SER
199
A
HIS
200
n
202
HIS
200
A
ASP
201
n
203
ASP
201
A
HIS
202
n
204
HIS
202
A
GLY
203
n
205
GLY
203
A
ARG
204
n
206
ARG
204
A
THR
205
n
207
THR
205
A
TRP
206
n
208
TRP
206
A
ALA
207
n
209
ALA
207
A
ARG
208
n
210
ARG
208
A
GLY
209
n
211
GLY
209
A
HIS
210
n
212
HIS
210
A
PHE
211
n
213
PHE
211
A
VAL
212
n
214
VAL
212
A
ALA
213
n
215
ALA
213
A
GLN
214
n
216
GLN
214
A
ASP
215
n
217
ASP
215
A
THR
216
n
218
THR
216
A
LEU
217
n
219
LEU
217
A
GLU
218
n
220
GLU
218
A
CYS
219
n
221
CYS
219
A
GLN
220
n
222
GLN
220
A
VAL
221
n
223
VAL
221
A
ALA
222
n
224
ALA
222
A
GLU
223
n
225
GLU
223
A
VAL
224
n
226
VAL
224
A
GLU
225
n
227
GLU
225
A
THR
226
n
228
THR
226
A
n
229
227
A
n
230
228
A
GLN
229
n
231
GLN
229
A
ARG
230
n
232
ARG
230
A
VAL
231
n
233
VAL
231
A
VAL
232
n
234
VAL
232
A
THR
233
n
235
THR
233
A
LEU
234
n
236
LEU
234
A
ASN
235
n
237
ASN
235
A
ALA
236
n
238
ALA
236
A
ARG
237
n
239
ARG
237
A
SER
238
n
240
SER
238
A
HIS
239
n
241
HIS
239
A
LEU
240
n
242
LEU
240
A
ARG
241
n
243
ARG
241
A
ALA
242
n
244
ALA
242
A
ARG
243
n
245
ARG
243
A
VAL
244
n
246
VAL
244
A
GLN
245
n
247
GLN
245
A
ALA
246
n
248
ALA
246
A
GLN
247
n
249
GLN
247
A
SER
248
n
250
SER
248
A
THR
249
n
251
THR
249
A
ASN
250
n
252
ASN
250
A
ASP
251
n
253
ASP
251
A
GLY
252
n
254
GLY
252
A
LEU
253
n
255
LEU
253
A
ASP
254
n
256
ASP
254
A
PHE
255
n
257
PHE
255
A
GLN
256
n
258
GLN
256
A
GLU
257
n
259
GLU
257
A
SER
258
n
260
SER
258
A
GLN
259
n
261
GLN
259
A
LEU
260
n
262
LEU
260
A
VAL
261
n
263
VAL
261
A
LYS
262
n
264
LYS
262
A
LYS
263
n
265
LYS
263
A
LEU
264
n
266
LEU
264
A
VAL
265
n
267
VAL
265
A
GLU
266
n
268
GLU
266
A
PRO
267
n
269
PRO
267
A
PRO
268
n
270
PRO
268
A
PRO
269
n
271
PRO
269
A
GLN
270
n
272
GLN
270
A
GLY
271
n
273
GLY
271
A
CYS
272
n
274
CYS
272
A
GLN
273
n
275
GLN
273
A
GLY
274
n
276
GLY
274
A
SER
275
n
277
SER
275
A
VAL
276
n
278
VAL
276
A
ILE
277
n
279
ILE
277
A
SER
278
n
280
SER
278
A
PHE
279
n
281
PHE
279
A
PRO
280
n
282
PRO
280
A
SER
281
n
283
SER
281
A
PRO
282
n
284
PRO
282
A
ARG
283
n
285
ARG
283
A
n
286
284
A
n
287
285
A
n
288
286
A
n
289
287
A
n
290
288
A
n
291
289
A
ALA
290
n
292
ALA
290
A
GLN
291
n
293
GLN
291
A
TRP
292
n
294
TRP
292
A
LEU
293
n
295
LEU
293
A
LEU
294
n
296
LEU
294
A
TYR
295
n
297
TYR
295
A
THR
296
n
298
THR
296
A
HIS
297
n
299
HIS
297
A
PRO
298
n
300
PRO
298
A
THR
299
n
301
THR
299
A
HIS
300
n
302
HIS
300
A
SER
301
n
303
SER
301
A
TRP
302
n
304
TRP
302
A
GLN
303
n
305
GLN
303
A
ARG
304
n
306
ARG
304
A
ALA
305
n
307
ALA
305
A
ASP
306
n
308
ASP
306
A
LEU
307
n
309
LEU
307
A
GLY
308
n
310
GLY
308
A
ALA
309
n
311
ALA
309
A
TYR
310
n
312
TYR
310
A
LEU
311
n
313
LEU
311
A
ASN
312
n
314
ASN
312
A
PRO
313
n
315
PRO
313
A
ARG
314
n
316
ARG
314
A
PRO
315
n
317
PRO
315
A
PRO
316
n
318
PRO
316
A
ALA
317
n
319
ALA
317
A
PRO
318
n
320
PRO
318
A
GLU
319
n
321
GLU
319
A
ALA
320
n
322
ALA
320
A
TRP
321
n
323
TRP
321
A
SER
322
n
324
SER
322
A
GLU
323
n
325
GLU
323
A
PRO
324
n
326
PRO
324
A
VAL
325
n
327
VAL
325
A
LEU
326
n
328
LEU
326
A
LEU
327
n
329
LEU
327
A
ALA
328
n
330
ALA
328
A
LYS
329
n
331
LYS
329
A
GLY
330
n
332
GLY
330
A
SER
331
n
333
SER
331
A
CYS
332
n
334
CYS
332
A
ALA
333
n
335
ALA
333
A
TYR
334
n
336
TYR
334
A
SER
335
n
337
SER
335
A
ASP
336
n
338
ASP
336
A
LEU
337
n
339
LEU
337
A
GLN
338
n
340
GLN
338
A
SER
339
n
341
SER
339
A
MET
340
n
342
MET
340
A
GLY
341
n
343
GLY
341
A
THR
342
n
344
THR
342
A
GLY
343
n
345
GLY
343
A
PRO
344
n
346
PRO
344
A
ASP
345
n
347
ASP
345
A
GLY
346
n
348
GLY
346
A
SER
347
n
349
SER
347
A
PRO
348
n
350
PRO
348
A
LEU
349
n
351
LEU
349
A
PHE
350
n
352
PHE
350
A
GLY
351
n
353
GLY
351
A
CYS
352
n
354
CYS
352
A
LEU
353
n
355
LEU
353
A
TYR
354
n
356
TYR
354
A
GLU
355
n
357
GLU
355
A
ALA
356
n
358
ALA
356
A
ASN
357
n
359
ASN
357
A
ASP
358
n
360
ASP
358
A
TYR
359
n
361
TYR
359
A
GLU
360
n
362
GLU
360
A
GLU
361
n
363
GLU
361
A
ILE
362
n
364
ILE
362
A
VAL
363
n
365
VAL
363
A
PHE
364
n
366
PHE
364
A
LEU
365
n
367
LEU
365
A
MET
366
n
368
MET
366
A
PHE
367
n
369
PHE
367
A
THR
368
n
370
THR
368
A
LEU
369
n
371
LEU
369
A
LYS
370
n
372
LYS
370
A
GLN
371
n
373
GLN
371
A
ALA
372
n
374
ALA
372
A
PHE
373
n
375
PHE
373
A
PRO
374
n
376
PRO
374
A
ALA
375
n
377
ALA
375
A
GLU
376
n
378
GLU
376
A
TYR
377
n
379
TYR
377
A
LEU
378
n
380
LEU
378
A
n
381
379
A
n
382
380
A
author_and_software_defined_assembly
PISA
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
N
GLU
10
A
N
GLU
12
A
O
PHE
364
A
O
PHE
366
A
O
LEU
365
A
O
LEU
367
A
N
CYS
352
A
N
CYS
354
A
O
LEU
349
A
O
LEU
351
A
N
GLY
341
A
N
GLY
343
A
O
GLY
330
A
O
GLY
332
A
N
ASP
306
A
N
ASP
308
A
O
ASN
312
A
O
ASN
314
A
N
LEU
293
A
N
LEU
295
A
O
LEU
294
A
O
LEU
296
A
N
ILE
277
A
N
ILE
279
A
N
ALA
24
A
N
ALA
26
A
O
PHE
37
A
O
PHE
39
A
N
ALA
36
A
N
ALA
38
A
O
ARG
55
A
O
ARG
57
A
N
ASP
60
A
N
ASP
62
A
O
GLN
65
A
O
GLN
67
A
N
ALA
24
A
N
ALA
26
A
O
PHE
37
A
O
PHE
39
A
N
ALA
36
A
N
ALA
38
A
O
ARG
55
A
O
ARG
57
A
N
LEU
54
A
N
LEU
56
A
O
GLU
72
A
O
GLU
74
A
N
ARG
83
A
N
ARG
85
A
O
ILE
105
A
O
ILE
107
A
N
ALA
104
A
N
ALA
106
A
O
ARG
123
A
O
ARG
125
A
N
GLN
126
A
N
GLN
128
A
O
ARG
140
A
O
ARG
142
A
N
THR
156
A
N
THR
158
A
O
TYR
181
A
O
TYR
183
A
O
VAL
175
A
O
VAL
177
A
N
LEU
165
A
N
LEU
167
A
N
THR
156
A
N
THR
158
A
O
TYR
181
A
O
TYR
183
A
N
ARG
182
A
N
ARG
184
A
O
ILE
191
A
O
ILE
193
A
N
LEU
198
A
N
LEU
200
A
O
ALA
207
A
O
ALA
209
A
N
ALA
222
A
N
ALA
224
A
O
THR
233
A
O
THR
235
A
N
ALA
236
A
N
ALA
238
A
O
VAL
244
A
O
VAL
246
A
N
GLN
245
A
N
GLN
247
A
O
GLN
259
A
O
GLN
261
1
A
O
LEU
378
A
O
LEU
380
1
Y
1
A
GLY
-1
A
GLY
1
1
Y
1
A
SER
0
A
SER
2
1
Y
1
A
MET
1
A
MET
3
1
Y
1
A
ALA
2
A
ALA
4
1
Y
1
A
SER
43
A
SER
45
1
Y
1
A
LYS
44
A
LYS
46
1
Y
1
A
LYS
45
A
LYS
47
1
Y
1
A
ALA
46
A
ALA
48
1
Y
1
A
GLU
47
A
GLU
49
1
Y
1
A
HIS
48
A
HIS
50
1
Y
1
A
THR
110
A
THR
112
1
Y
1
A
GLU
111
A
GLU
113
1
Y
1
A
GLN
112
A
GLN
114
1
Y
1
A
GLN
113
A
GLN
115
1
Y
1
A
GLN
114
A
GLN
116
1
Y
1
A
LEU
115
A
LEU
117
1
Y
1
A
GLN
116
A
GLN
118
1
Y
1
A
THR
117
A
THR
119
1
Y
1
A
GLY
227
A
GLY
229
1
Y
1
A
GLU
228
A
GLU
230
1
Y
1
A
SER
284
A
SER
286
1
Y
1
A
GLY
285
A
GLY
287
1
Y
1
A
PRO
286
A
PRO
288
1
Y
1
A
GLY
287
A
GLY
289
1
Y
1
A
SER
288
A
SER
290
1
Y
1
A
PRO
289
A
PRO
291
1
Y
1
A
PRO
379
A
PRO
381
1
Y
1
A
GLN
380
A
GLN
382
1
Y
1
A
A
PRO
PRO
268
269
-123.81
1
7.62
1.10
114.20
121.82
A
A
A
CA
CB
SG
CYS
CYS
CYS
164
164
164
N
1
11.41
1.50
119.30
130.71
A
A
A
C
N
CA
PRO
PRO
PRO
267
268
268
Y
1
-13.13
2.10
128.40
115.27
A
A
A
C
N
CD
PRO
PRO
PRO
268
269
269
Y
1
A
A
OD2
OE2
ASP
GLU
144
376
2.10
1_555
6_555
1
A
LEU
4
-38.79
146.49
1
A
ILE
22
71.73
76.02
1
A
GLN
32
39.92
32.67
1
A
GLU
50
20.15
-102.15
1
A
GLN
108
-61.38
26.64
1
A
TYR
151
-37.55
-37.31
1
A
CYS
164
-106.40
-165.60
1
A
ASN
168
-99.44
30.76
1
A
ALA
213
174.21
153.24
1
A
LEU
217
-119.16
-133.74
1
A
PHE
255
-106.83
69.74
1
A
PRO
268
-39.17
-178.51
1
A
PRO
269
22.33
-82.61
1
A
GLN
270
-151.19
43.05
1
A
HIS
297
-177.37
149.25
1
A
ASP
306
72.68
71.68
1
A
ALA
317
-39.42
117.42
1
A
ALA
333
-132.12
-119.37
1
A
ALA
333
-125.51
-119.37
1
A
TYR
359
59.17
19.60
1
A
TYR
377
55.45
-162.97
37.561
0.58
0.00
0.00
0.81
0.00
-1.39
0.953
0.891
0.26311
0.17408
0.17840
2.513
46.20
597
11940
11706
4.9
98.82
11.023
0.247
RANDOM
1
THROUGHOUT
0
0
MOLECULAR REPLACEMENT
0.338
0.80
0.80
1.20
PDB ENTRY 1VCU
MAXIMUM LIKELIHOOD
MASK
2.513
46.20
103
2919
31
0
2785
0.012
0.019
2913
1.722
1.959
3979
8.069
5.000
355
37.023
23.165
139
18.281
15.000
433
18.874
15.000
24
0.096
0.200
431
0.009
0.021
2279
2.565
3.568
1422
4.120
5.324
1773
3.203
3.878
1491
8.201
30.482
4431
0.347
0.230
2.578
40
791
20
91.42
2.513
46.20
4NC5
11940
11706
0
0
1
98.8
2.513
2.578
1
91.4
phasing
MOLREP
refinement
REFMAC
5.7.32
data reduction
HKL-2000
data scaling
SCALEPACK
Human sialidase 2 in complex with 2,3-difluorosialic acid (covalent intermediate)
1
N
N
2
N
N
3
N
N
3
N
N
4
N
N
A
PRO
29
A
PRO
31
HELX_P
A
GLN
31
A
GLN
33
5
1
3
A
ALA
61
A
ALA
63
HELX_P
A
HIS
64
A
HIS
66
5
2
4
A
LEU
142
A
LEU
144
HELX_P
A
GLY
148
A
GLY
150
1
3
7
A
PRO
149
A
PRO
151
HELX_P
A
ARG
152
A
ARG
154
5
4
4
A
ALA
317
A
ALA
319
HELX_P
A
TRP
321
A
TRP
323
5
5
5
A
LEU
369
A
LEU
371
HELX_P
A
PHE
373
A
PHE
375
1
6
5
A
PRO
374
A
PRO
376
HELX_P
A
TYR
377
A
TYR
379
5
7
4
disulf
2.077
A
A
CYS
88
A
SG
CYS
90
1_555
A
CYS
164
A
SG
CYS
166
1_555
covale
2.115
one
A
TYR
334
A
OH
TYR
336
1_555
A
FSI
401
B
C2
FSI
1_555
HYDROLASE
Human neuraminidase, sialidase, HYDROLASE
A
GLY
160
A
GLY
162
1
A
PRO
161
A
PRO
163
1.57
A
PRO
315
A
PRO
317
1
A
PRO
316
A
PRO
318
0.20
NEUR2_HUMAN
UNP
1
1
Q9Y3R4
MASLPVLQKESVFQSGAHAYRIPALLYLPGQQSLLAFAEQRASKKDEHAELIVLRRGDYDAPTHQVQWQAQEVVAQARLD
GHRSMNPCPLYDAQTGTLFLFFIAIPGQVTEQQQLQTRANVTRLCQVTSTDHGRTWSSPRDLTDAAIGPAYREWSTFAVG
PGHCLQLHDRARSLVVPAYAYRKLHPIQRPIPSAFCFLSHDHGRTWARGHFVAQDTLECQVAEVETGEQRVVTLNARSHL
RARVQAQSTNDGLDFQESQLVKKLVEPPPQGCQGSVISFPSPRSGPGSPAQWLLYTHPTHSWQRADLGAYLNPRPPAPEA
WSEPVLLAKGSCAYSDLQSMGTGPDGSPLFGCLYEANDYEEIVFLMFTLKQAFPAEYLPQ
1
380
4NC5
1
380
Q9Y3R4
A
1
3
382
1
expression tag
GLY
-1
4NC5
A
Q9Y3R4
UNP
1
1
expression tag
SER
0
4NC5
A
Q9Y3R4
UNP
2
1
ASP
engineered mutation
ALA
46
4NC5
A
Q9Y3R4
UNP
46
48
1
HIS
engineered mutation
ASN
168
4NC5
A
Q9Y3R4
UNP
168
170
7
4
4
4
3
4
4
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
A
GLN
8
A
GLN
10
A
GLN
14
A
GLN
16
A
GLU
361
A
GLU
363
A
THR
368
A
THR
370
A
PRO
348
A
PRO
350
A
ALA
356
A
ALA
358
A
VAL
325
A
VAL
327
A
THR
342
A
THR
344
A
ALA
305
A
ALA
307
A
ASN
312
A
ASN
314
A
GLN
291
A
GLN
293
A
PRO
298
A
PRO
300
A
SER
275
A
SER
277
A
PRO
280
A
PRO
282
A
ALA
19
A
ALA
21
A
LEU
28
A
LEU
30
A
SER
33
A
SER
35
A
ARG
41
A
ARG
43
A
LEU
51
A
LEU
53
A
ASP
60
A
ASP
62
A
GLN
65
A
GLN
67
A
TRP
68
A
TRP
70
A
ALA
19
A
ALA
21
A
LEU
28
A
LEU
30
A
SER
33
A
SER
35
A
ARG
41
A
ARG
43
A
LEU
51
A
LEU
53
A
ASP
60
A
ASP
62
A
GLU
72
A
GLU
74
A
VAL
73
A
VAL
75
A
HIS
82
A
HIS
84
A
ASP
92
A
ASP
94
A
THR
97
A
THR
99
A
PRO
106
A
PRO
108
A
ARG
123
A
ARG
125
A
SER
129
A
SER
131
A
ARG
140
A
ARG
142
A
ASP
141
A
ASP
143
A
TRP
154
A
TRP
156
A
VAL
159
A
VAL
161
A
LEU
174
A
LEU
176
A
ARG
182
A
ARG
184
A
LEU
165
A
LEU
167
A
GLN
166
A
GLN
168
A
TRP
154
A
TRP
156
A
VAL
159
A
VAL
161
A
LEU
174
A
LEU
176
A
ARG
182
A
ARG
184
A
ILE
191
A
ILE
193
A
SER
199
A
SER
201
A
ALA
207
A
ALA
209
A
ARG
208
A
ARG
210
A
THR
216
A
THR
218
A
VAL
224
A
VAL
226
A
VAL
231
A
VAL
233
A
SER
238
A
SER
240
A
ALA
242
A
ALA
244
A
SER
248
A
SER
250
A
GLU
257
A
GLU
259
A
VAL
265
A
VAL
267
20
C 2 2 21