0.009017
0.000000
0.000000
0.000000
0.008562
0.000000
0.000000
0.000000
0.015552
0.00000
0.00000
0.00000
PRO I 37 IS A CIS PROLINE.
Mitsui, Y.
Takeuchi, Y.
Nonaka, T.
Nakamura, K.T.
http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic
8
90.00
90.00
90.00
110.900
116.800
64.300
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
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
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
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
N
N
159
S
C
N
160
N
C
N
161
N
O
N
162
S
C
N
163
N
C
N
164
N
C
N
165
N
C
N
166
N
O
N
167
N
H
N
168
N
H
N
169
N
H
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
N
N
181
S
C
N
182
N
C
N
183
N
O
N
184
N
C
N
185
N
C
N
186
N
C
N
187
N
C
N
188
N
O
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
H
N
199
N
H
N
200
N
H
N
201
N
H
N
202
N
N
N
203
S
C
N
204
N
C
N
205
N
O
N
206
N
C
N
207
N
C
N
208
N
C
N
209
N
C
N
210
N
N
N
211
N
O
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
H
N
224
N
H
N
225
N
H
N
226
N
H
N
227
N
N
N
228
S
C
N
229
N
C
N
230
N
O
N
231
N
C
N
232
N
C
N
233
N
S
N
234
N
C
N
235
N
O
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
Y
252
N
C
Y
253
N
C
Y
254
N
C
Y
255
N
C
Y
256
N
C
Y
257
N
C
N
258
N
O
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
C
N
277
N
O
N
278
N
H
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
N
N
288
S
C
N
289
N
C
N
290
N
O
N
291
N
C
N
292
N
O
N
293
N
O
N
294
N
H
N
295
N
H
N
296
N
H
N
297
N
H
N
298
N
H
N
299
N
H
N
300
N
H
N
301
N
N
N
302
S
C
N
303
N
C
N
304
N
O
N
305
R
C
N
306
N
O
N
307
N
C
N
308
N
O
N
309
N
H
N
310
N
H
N
311
N
H
N
312
N
H
N
313
N
H
N
314
N
H
N
315
N
H
N
316
N
H
N
317
N
H
N
318
N
N
N
319
S
C
N
320
N
C
N
321
N
O
N
322
N
C
Y
323
N
C
Y
324
N
C
Y
325
N
C
Y
326
N
N
Y
327
N
C
Y
328
N
C
Y
329
N
C
Y
330
N
C
Y
331
N
C
N
332
N
O
N
333
N
H
N
334
N
H
N
335
N
H
N
336
N
H
N
337
N
H
N
338
N
H
N
339
N
H
N
340
N
H
N
341
N
H
N
342
N
H
N
343
N
H
N
344
N
H
N
345
N
N
N
346
S
C
N
347
N
C
N
348
N
O
N
349
N
C
Y
350
N
C
Y
351
N
C
Y
352
N
C
Y
353
N
C
Y
354
N
C
Y
355
N
C
N
356
N
O
N
357
N
O
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
N
N
370
S
C
N
371
N
C
N
372
N
O
N
373
N
C
N
374
N
C
N
375
N
C
N
376
N
O
N
377
N
H
N
378
N
H
N
379
N
H
N
380
N
H
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
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
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
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
doub
N
178
N
sing
N
179
N
sing
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
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
sing
N
220
N
sing
N
221
N
sing
N
222
N
doub
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
sing
N
241
N
doub
N
242
N
sing
N
243
N
sing
N
244
N
sing
N
245
N
sing
Y
246
N
doub
Y
247
N
sing
Y
248
N
sing
N
249
N
sing
Y
250
N
doub
N
251
N
sing
Y
252
N
doub
N
253
N
sing
Y
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
doub
N
282
N
sing
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
doub
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
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
Y
315
N
doub
Y
316
N
sing
Y
317
N
sing
N
318
N
sing
Y
319
N
doub
Y
320
N
sing
Y
321
N
sing
N
322
N
sing
Y
323
N
sing
Y
324
N
doub
N
325
N
sing
Y
326
N
doub
N
327
N
sing
Y
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
doub
N
339
N
sing
N
340
N
sing
N
341
N
sing
N
342
N
sing
Y
343
N
doub
Y
344
N
sing
Y
345
N
sing
N
346
N
sing
Y
347
N
doub
N
348
N
sing
Y
349
N
doub
N
350
N
sing
Y
351
N
sing
N
352
N
sing
N
353
N
sing
N
354
N
sing
N
355
N
sing
N
356
N
sing
N
357
N
sing
N
358
N
sing
N
359
N
sing
N
360
N
sing
N
361
N
sing
N
362
N
doub
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
sing
N
371
N
sing
N
372
N
sing
N
373
N
sing
US
Proc.Natl.Acad.Sci.USA
PNASA6
0040
0027-8424
89
4407
4411
10.1073/pnas.89.10.4407
1584773
Crystal structure of an engineered subtilisin inhibitor complexed with bovine trypsin.
1992
UK
J.Mol.Biol.
JMOBAK
0070
0022-2836
221
309
Refined Crystal Structure of the Complex of Subtilisin Bpn' and Streptomyces Subtilisin Inhibitor at 1.8 Angstroms Resolution
1991
10.2210/pdb2tld/pdb
pdb_00002tld
1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
1.000000
0.00000
0.00000
0.00000
1
x-ray
1
1.0
22903.805
TRYPSIN
3.4.21.4
1
man
polymer
11135.486
STREPTOMYCES SUBTILISIN INHIBITOR (SSI)
1
man
polymer
no
no
IVGGYTCGANTVPYQVSLNSGYHFCGGSLINSQWVVSAAHCYKSGIQVRLGEDNINVVEGNEQFISASKSIVHPSYNSNT
LNNDIMLIKLKSAASLNSRVASISLPTSCASAGTQCLISGWGNTKSSGTSYPDVLKCLKAPILSDSSCKSAYPGQITSNM
FCAGLEGGDSCQGDSGGPVVCSGKLQGIVSWGSGCAKNKPGVYTKVCNYVSWIKQTIASN
IVGGYTCGANTVPYQVSLNSGYHFCGGSLINSQWVVSAAHCYKSGIQVRLGEDNINVVEGNEQFISASKSIVHPSYNSNT
LNNDIMLIKLKSAASLNSRVASISLPTSCASAGTQCLISGWGNTKSSGTSYPDVLKCLKAPILSDSSCKSAYPGQITSNM
FCAGLEGGDSCQGDSGGPVVCSGKLQGIVSWGSGCAKNKPGVYTKVCNYVSWIKQTIASN
E
polypeptide(L)
no
no
SALYAPSALVLTVGKGVSATTAAPERAVTLTCAPGPSGTHPAAGSACADLAAVGGDLNALTRGEDVGCPKVYDPVLLTVD
GVWQGKRVSYERVFSNECEMNAHGSSVFAF
SALYAPSALVLTVGKGVSATTAAPERAVTLTCAPGPSGTHPAAGSACADLAAVGGDLNALTRGEDVGCPKVYDPVLLTVD
GVWQGKRVSYERVFSNECEMNAHGSSVFAF
I
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
cattle
Bos
sample
9913
Bos taurus
3.06
59.77
chem_comp_atom
chem_comp_bond
database_2
pdbx_database_status
struct_ref_seq_dif
repository
Initial release
Version format compliance
Version format compliance
Data collection
Database references
Other
1
0
1992-07-15
1
1
2008-03-03
1
2
2011-07-13
1
3
2024-02-21
_database_2.pdbx_DOI
_database_2.pdbx_database_accession
_pdbx_database_status.process_site
_struct_ref_seq_dif.details
CA ATOMS ONLY
CA ATOMS ONLY
COMPLEX OF SUBTILISIN BPN WITH WILD STRETOMYCES SUBTILISIN INHIBITOR
Y
BNL
1991-09-16
REL
ILE
16
n
1
ILE
16
E
VAL
17
n
2
VAL
17
E
GLY
18
n
3
GLY
18
E
GLY
19
n
4
GLY
19
E
TYR
20
n
5
TYR
20
E
THR
21
n
6
THR
21
E
CYS
22
n
7
CYS
22
E
GLY
23
n
8
GLY
23
E
ALA
24
n
9
ALA
24
E
ASN
25
n
10
ASN
25
E
THR
26
n
11
THR
26
E
VAL
27
n
12
VAL
27
E
PRO
28
n
13
PRO
28
E
TYR
29
n
14
TYR
29
E
GLN
30
n
15
GLN
30
E
VAL
31
n
16
VAL
31
E
SER
32
n
17
SER
32
E
LEU
33
n
18
LEU
33
E
ASN
34
n
19
ASN
34
E
SER
37
n
20
SER
37
E
GLY
38
n
21
GLY
38
E
TYR
39
n
22
TYR
39
E
HIS
40
n
23
HIS
40
E
PHE
41
n
24
PHE
41
E
CYS
42
n
25
CYS
42
E
GLY
43
n
26
GLY
43
E
GLY
44
n
27
GLY
44
E
SER
45
n
28
SER
45
E
LEU
46
n
29
LEU
46
E
ILE
47
n
30
ILE
47
E
ASN
48
n
31
ASN
48
E
SER
49
n
32
SER
49
E
GLN
50
n
33
GLN
50
E
TRP
51
n
34
TRP
51
E
VAL
52
n
35
VAL
52
E
VAL
53
n
36
VAL
53
E
SER
54
n
37
SER
54
E
ALA
55
n
38
ALA
55
E
ALA
56
n
39
ALA
56
E
HIS
57
n
40
HIS
57
E
CYS
58
n
41
CYS
58
E
TYR
59
n
42
TYR
59
E
LYS
60
n
43
LYS
60
E
SER
61
n
44
SER
61
E
GLY
62
n
45
GLY
62
E
ILE
63
n
46
ILE
63
E
GLN
64
n
47
GLN
64
E
VAL
65
n
48
VAL
65
E
ARG
66
n
49
ARG
66
E
LEU
67
n
50
LEU
67
E
GLY
69
n
51
GLY
69
E
GLU
70
n
52
GLU
70
E
ASP
71
n
53
ASP
71
E
ASN
72
n
54
ASN
72
E
ILE
73
n
55
ILE
73
E
ASN
74
n
56
ASN
74
E
VAL
75
n
57
VAL
75
E
VAL
76
n
58
VAL
76
E
GLU
77
n
59
GLU
77
E
GLY
78
n
60
GLY
78
E
ASN
79
n
61
ASN
79
E
GLU
80
n
62
GLU
80
E
GLN
81
n
63
GLN
81
E
PHE
82
n
64
PHE
82
E
ILE
83
n
65
ILE
83
E
SER
84
n
66
SER
84
E
ALA
85
n
67
ALA
85
E
SER
86
n
68
SER
86
E
LYS
87
n
69
LYS
87
E
SER
88
n
70
SER
88
E
ILE
89
n
71
ILE
89
E
VAL
90
n
72
VAL
90
E
HIS
91
n
73
HIS
91
E
PRO
92
n
74
PRO
92
E
SER
93
n
75
SER
93
E
TYR
94
n
76
TYR
94
E
ASN
95
n
77
ASN
95
E
SER
96
n
78
SER
96
E
ASN
97
n
79
ASN
97
E
THR
98
n
80
THR
98
E
LEU
99
n
81
LEU
99
E
ASN
100
n
82
ASN
100
E
ASN
101
n
83
ASN
101
E
ASP
102
n
84
ASP
102
E
ILE
103
n
85
ILE
103
E
MET
104
n
86
MET
104
E
LEU
105
n
87
LEU
105
E
ILE
106
n
88
ILE
106
E
LYS
107
n
89
LYS
107
E
LEU
108
n
90
LEU
108
E
LYS
109
n
91
LYS
109
E
SER
110
n
92
SER
110
E
ALA
111
n
93
ALA
111
E
ALA
112
n
94
ALA
112
E
SER
113
n
95
SER
113
E
LEU
114
n
96
LEU
114
E
ASN
115
n
97
ASN
115
E
SER
116
n
98
SER
116
E
ARG
117
n
99
ARG
117
E
VAL
118
n
100
VAL
118
E
ALA
119
n
101
ALA
119
E
SER
120
n
102
SER
120
E
ILE
121
n
103
ILE
121
E
SER
122
n
104
SER
122
E
LEU
123
n
105
LEU
123
E
PRO
124
n
106
PRO
124
E
THR
125
n
107
THR
125
E
SER
127
n
108
SER
127
E
CYS
128
n
109
CYS
128
E
ALA
129
n
110
ALA
129
E
SER
130
n
111
SER
130
E
ALA
132
n
112
ALA
132
E
GLY
133
n
113
GLY
133
E
THR
134
n
114
THR
134
E
GLN
135
n
115
GLN
135
E
CYS
136
n
116
CYS
136
E
LEU
137
n
117
LEU
137
E
ILE
138
n
118
ILE
138
E
SER
139
n
119
SER
139
E
GLY
140
n
120
GLY
140
E
TRP
141
n
121
TRP
141
E
GLY
142
n
122
GLY
142
E
ASN
143
n
123
ASN
143
E
THR
144
n
124
THR
144
E
LYS
145
n
125
LYS
145
E
SER
146
n
126
SER
146
E
SER
147
n
127
SER
147
E
GLY
148
n
128
GLY
148
E
THR
149
n
129
THR
149
E
SER
150
n
130
SER
150
E
TYR
151
n
131
TYR
151
E
PRO
152
n
132
PRO
152
E
ASP
153
n
133
ASP
153
E
VAL
154
n
134
VAL
154
E
LEU
155
n
135
LEU
155
E
LYS
156
n
136
LYS
156
E
CYS
157
n
137
CYS
157
E
LEU
158
n
138
LEU
158
E
LYS
159
n
139
LYS
159
E
ALA
160
n
140
ALA
160
E
PRO
161
n
141
PRO
161
E
ILE
162
n
142
ILE
162
E
LEU
163
n
143
LEU
163
E
SER
164
n
144
SER
164
E
ASP
165
n
145
ASP
165
E
SER
166
n
146
SER
166
E
SER
167
n
147
SER
167
E
CYS
168
n
148
CYS
168
E
LYS
169
n
149
LYS
169
E
SER
170
n
150
SER
170
E
ALA
171
n
151
ALA
171
E
TYR
172
n
152
TYR
172
E
PRO
173
n
153
PRO
173
E
GLY
174
n
154
GLY
174
E
GLN
175
n
155
GLN
175
E
ILE
176
n
156
ILE
176
E
THR
177
n
157
THR
177
E
SER
178
n
158
SER
178
E
ASN
179
n
159
ASN
179
E
MET
180
n
160
MET
180
E
PHE
181
n
161
PHE
181
E
CYS
182
n
162
CYS
182
E
ALA
183
n
163
ALA
183
E
GLY
184
n
164
GLY
184
E
LEU
185
n
165
LEU
185
E
GLU
186
n
166
GLU
186
E
GLY
187
n
167
GLY
187
E
GLY
188
n
168
GLY
188
E
ASP
189
n
169
ASP
189
E
SER
190
n
170
SER
190
E
CYS
191
n
171
CYS
191
E
GLN
192
n
172
GLN
192
E
GLY
193
n
173
GLY
193
E
ASP
194
n
174
ASP
194
E
SER
195
n
175
SER
195
E
GLY
196
n
176
GLY
196
E
GLY
197
n
177
GLY
197
E
PRO
198
n
178
PRO
198
E
VAL
199
n
179
VAL
199
E
VAL
200
n
180
VAL
200
E
CYS
201
n
181
CYS
201
E
SER
202
n
182
SER
202
E
GLY
203
n
183
GLY
203
E
LYS
204
n
184
LYS
204
E
LEU
209
n
185
LEU
209
E
GLN
210
n
186
GLN
210
E
GLY
211
n
187
GLY
211
E
ILE
212
n
188
ILE
212
E
VAL
213
n
189
VAL
213
E
SER
214
n
190
SER
214
E
TRP
215
n
191
TRP
215
E
GLY
216
n
192
GLY
216
E
SER
217
n
193
SER
217
E
GLY
219
n
194
GLY
219
E
CYS
220
n
195
CYS
220
E
ALA
221
n
196
ALA
221
E
LYS
222
n
197
LYS
222
E
ASN
223
n
198
ASN
223
E
LYS
224
n
199
LYS
224
E
PRO
225
n
200
PRO
225
E
GLY
226
n
201
GLY
226
E
VAL
227
n
202
VAL
227
E
TYR
228
n
203
TYR
228
E
THR
229
n
204
THR
229
E
LYS
230
n
205
LYS
230
E
VAL
231
n
206
VAL
231
E
CYS
232
n
207
CYS
232
E
ASN
233
n
208
ASN
233
E
TYR
234
n
209
TYR
234
E
VAL
235
n
210
VAL
235
E
SER
236
n
211
SER
236
E
TRP
237
n
212
TRP
237
E
ILE
238
n
213
ILE
238
E
LYS
239
n
214
LYS
239
E
GLN
240
n
215
GLN
240
E
THR
241
n
216
THR
241
E
ILE
242
n
217
ILE
242
E
ALA
243
n
218
ALA
243
E
SER
244
n
219
SER
244
E
ASN
245
n
220
ASN
245
E
SER
4
n
1
SER
4
I
ALA
5
n
2
ALA
5
I
LEU
6
n
3
LEU
6
I
TYR
7
n
4
TYR
7
I
ALA
8
n
5
ALA
8
I
PRO
9
n
6
PRO
9
I
SER
10
n
7
SER
10
I
ALA
11
n
8
ALA
11
I
LEU
12
n
9
LEU
12
I
VAL
13
n
10
VAL
13
I
LEU
14
n
11
LEU
14
I
THR
15
n
12
THR
15
I
VAL
16
n
13
VAL
16
I
GLY
17
n
14
GLY
17
I
LYS
18
n
15
LYS
18
I
GLY
19
n
16
GLY
19
I
VAL
20
n
17
VAL
20
I
SER
21
n
18
SER
21
I
ALA
22
n
19
ALA
22
I
THR
23
n
20
THR
23
I
THR
24
n
21
THR
24
I
ALA
25
n
22
ALA
25
I
ALA
26
n
23
ALA
26
I
PRO
27
n
24
PRO
27
I
GLU
28
n
25
GLU
28
I
ARG
29
n
26
ARG
29
I
ALA
30
n
27
ALA
30
I
VAL
31
n
28
VAL
31
I
THR
32
n
29
THR
32
I
LEU
33
n
30
LEU
33
I
THR
34
n
31
THR
34
I
CYS
35
n
32
CYS
35
I
ALA
36
n
33
ALA
36
I
PRO
37
n
34
PRO
37
I
GLY
38
n
35
GLY
38
I
PRO
39
n
36
PRO
39
I
SER
40
n
37
SER
40
I
GLY
41
n
38
GLY
41
I
THR
42
n
39
THR
42
I
HIS
43
n
40
HIS
43
I
PRO
44
n
41
PRO
44
I
ALA
45
n
42
ALA
45
I
ALA
46
n
43
ALA
46
I
GLY
47
n
44
GLY
47
I
SER
48
n
45
SER
48
I
ALA
49
n
46
ALA
49
I
CYS
50
n
47
CYS
50
I
ALA
51
n
48
ALA
51
I
ASP
52
n
49
ASP
52
I
LEU
53
n
50
LEU
53
I
ALA
54
n
51
ALA
54
I
ALA
55
n
52
ALA
55
I
VAL
56
n
53
VAL
56
I
GLY
57
n
54
GLY
57
I
GLY
58
n
55
GLY
58
I
ASP
59
n
56
ASP
59
I
LEU
60
n
57
LEU
60
I
ASN
61
n
58
ASN
61
I
ALA
62
n
59
ALA
62
I
LEU
63
n
60
LEU
63
I
THR
64
n
61
THR
64
I
ARG
65
n
62
ARG
65
I
GLY
66
n
63
GLY
66
I
GLU
67
n
64
GLU
67
I
ASP
68
n
65
ASP
68
I
VAL
69
n
66
VAL
69
I
GLY
70
n
67
GLY
70
I
CYS
71
n
68
CYS
71
I
PRO
72
n
69
PRO
72
I
LYS
73
n
70
LYS
73
I
VAL
74
n
71
VAL
74
I
TYR
75
n
72
TYR
75
I
ASP
76
n
73
ASP
76
I
PRO
77
n
74
PRO
77
I
VAL
78
n
75
VAL
78
I
LEU
79
n
76
LEU
79
I
LEU
80
n
77
LEU
80
I
THR
81
n
78
THR
81
I
VAL
82
n
79
VAL
82
I
ASP
83
n
80
ASP
83
I
GLY
84
n
81
GLY
84
I
VAL
85
n
82
VAL
85
I
TRP
86
n
83
TRP
86
I
GLN
87
n
84
GLN
87
I
GLY
88
n
85
GLY
88
I
LYS
89
n
86
LYS
89
I
ARG
90
n
87
ARG
90
I
VAL
91
n
88
VAL
91
I
SER
92
n
89
SER
92
I
TYR
93
n
90
TYR
93
I
GLU
94
n
91
GLU
94
I
ARG
95
n
92
ARG
95
I
VAL
96
n
93
VAL
96
I
PHE
97
n
94
PHE
97
I
SER
98
n
95
SER
98
I
ASN
99
n
96
ASN
99
I
GLU
100
n
97
GLU
100
I
CYS
101
n
98
CYS
101
I
GLU
102
n
99
GLU
102
I
MET
103
n
100
MET
103
I
ASN
104
n
101
ASN
104
I
ALA
105
n
102
ALA
105
I
HIS
106
n
103
HIS
106
I
GLY
107
n
104
GLY
107
I
SER
108
n
105
SER
108
I
SER
109
n
106
SER
109
I
VAL
110
n
107
VAL
110
I
PHE
111
n
108
PHE
111
I
ALA
112
n
109
ALA
112
I
PHE
113
n
110
PHE
113
I
author_defined_assembly
2
dimeric
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
0.173
2.6
8.0
6166
1
2.6
8.0
0
330
0
0
330
0.020
4.3
refinement
X-PLOR
CRYSTAL STRUCTURE OF AN ENGINEERED SUBTILISIN INHIBITOR COMPLEXED WITH BOVINE TRYPSIN
1
N
N
2
N
N
SSI IS A DIMERIC MOLECULE (I2) CONSISTING OF TWO IDENTICAL
SUBUNITS. IT BINDS TWO TRYPSIN MOLECULES (2E) TO
FORM A DIMERIC COMPLEX E2I2. THE CRYSTALLOGRAPHIC
ASYMMETRIC UNIT CORRESPONDS TO HALF THE COMPLEX MOLECULE
(EI). IN THIS ENTRY COORDINATES FOR ALPHA-CARBON ATOMS
ARE PROVIDED FOR ONE CHAIN OF TRYPSIN USING THE CHAIN
IDENTIFIER *E* AND FOR ONE CHAIN OF MODIFIED SSI USING
THE CHAIN IDENTIFIER *I*.
COORDINATES FOR THE OTHER EI COMPLEX CAN BE GENERATED FROM
THE COORDINATES IN THIS ENTRY USING THE FOLLOWING
TRANSFORMATION:
-1.0 0.0 0.0
0.0 -1.0 0.0
0.0 0.0 1.0
E
SER
164
A
SER
144
HELX_P
SINGLE ALPHA TURN,REST IRREG.
E
TYR
172
A
TYR
152
1
H1
9
E
LYS
230
A
LYS
205
HELX_P
CONTIGUOUS WITH H3
E
VAL
235
A
VAL
210
5
H2
6
E
SER
236
A
SER
211
HELX_P
CONTIGUOUS WITH H2
E
ASN
245
A
ASN
220
1
H3
10
I
ALA
46
B
ALA
43
HELX_P
I
VAL
56
B
VAL
53
1
H4
11
I
ASN
99
B
ASN
96
HELX_P
I
HIS
106
B
HIS
103
1
H5
8
HYDROLASE/HYDROLASE INHIBITOR
PROTEINASE, HYDROLASE-HYDROLASE INHIBITOR COMPLEX, TRYPSIN)
TRY1_BOVIN
UNP
1
1
P00760
FIFLALLGAAVAFPVDDDDKIVGGYTCGANTVPYQVSLNSGYHFCGGSLINSQWVVSAAHCYKSGIQVRLGEDNINVVEG
NEQFISASKSIVHPSYNSNTLNNDIMLIKLKSAASLNSRVASISLPTSCASAGTQCLISGWGNTKSSGTSYPDVLKCLKA
PILSDSSCKSAYPGQITSNMFCAGYLEGGKDSCQGDSGGPVVCSGKLQGIVSWGSGCAQKNKPGVYTKVCNYVSWIKQTI
ASN
SSI_STRAO
UNP
2
1
P01006
MRNTGAGPSPSVSRPPPSAAPLSGAALAAPGDAPSALYAPSALVLTVGKGVSATTAAPERAVTLTCAPGPSGTHPAAGSA
CADLAAVGGDLNALTRGEDVMCPMVYDPVLLTVDGVWQGKRVSYERVFSNECEMNAHGSSVFAF
21
243
2TLD
16
245
P00760
E
1
1
220
35
144
2TLD
4
113
P01006
I
2
1
110
1
TYR
deletion
2TLD
E
P00760
UNP
185
1
LYS
deletion
2TLD
E
P00760
UNP
190
1
GLN
deletion
2TLD
E
P00760
UNP
219
2
MET
conflict
GLY
70
2TLD
I
P01006
UNP
101
67
2
MET
conflict
LYS
73
2TLD
I
P01006
UNP
104
70
6
4
2
5
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
E
LYS
156
A
LYS
136
E
PRO
161
A
PRO
141
E
CYS
136
A
CYS
116
E
GLY
140
A
GLY
120
E
GLY
197
A
GLY
177
E
CYS
201
A
CYS
181
E
LYS
204
A
LYS
184
E
TRP
215
A
TRP
191
E
GLY
226
A
GLY
201
E
VAL
231
A
VAL
206
E
ASN
179
A
ASN
159
E
ALA
183
A
ALA
163
E
GLY
43
A
GLY
26
E
SER
45
A
SER
28
E
VAL
52
A
VAL
35
E
ALA
55
A
ALA
38
E
ILE
103
A
ILE
85
E
LYS
107
A
LYS
89
E
LYS
87
A
LYS
69
E
HIS
91
A
HIS
73
E
ILE
63
A
ILE
46
E
LEU
67
A
LEU
50
E
GLN
81
A
GLN
63
E
ALA
85
A
ALA
67
I
SER
40
B
SER
37
I
THR
42
B
THR
39
I
ARG
29
B
ARG
26
I
CYS
35
B
CYS
32
I
SER
10
B
SER
7
I
GLY
19
B
GLY
16
I
PRO
77
B
PRO
74
I
GLN
87
B
GLN
84
I
LYS
89
B
LYS
86
I
PHE
97
B
PHE
94
RESIDUES FORMING THE CATALYTIC TRIAD IN TRYPSIN
Author
3
A THREE-RESIDUE POLYPEPTIDE SEGMENT OF SUBTILISIN CAPABLE OF FORMING AN ANTIPARALLEL BETA SHEET WITH THE P1, P2 AND P3 RESIDUES OF A LIGAND
Author
3
RESIDUES OF SSI CONNECTED THROUGH A REACTIVE SITE PEPTIDE BOND (OR A SCISSIBLE BOND) WHICH IS POTENTIALLY CLEAVED BY TARGET ENZYMES INCLUDING TRYPSIN AND SUBTILISIN.
Author
2
E
ASP
102
A
ASP
84
3
1_555
E
HIS
57
A
HIS
40
3
1_555
E
SER
195
A
SER
175
3
1_555
E
SER
214
A
SER
190
3
1_555
E
TRP
215
A
TRP
191
3
1_555
E
GLY
216
A
GLY
192
3
1_555
I
LYS
73
B
LYS
70
2
1_555
I
VAL
74
B
VAL
71
2
1_555
23
I 2 2 2