0.013876
0.000000
0.000000
0.000000
0.006624
0.000000
0.000000
0.000000
0.024477
0.00000
0.00000
0.00000
CIS PROLINE - PRO E 23
Fujinaga, M.
Chernaia, M.M.
Tarasova, N.
Mosimann, S.C.
James, M.N.G.
http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic
4
90.00
90.00
90.00
72.068
150.972
40.854
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
C5 H10 O2
102.132
ISOVALERIC ACID
non-polymer
C6 H13 N O2
131.173
y
LEUCINE
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
C8 H17 N O3
175.225
STATINE
peptide-like
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
US
Protein Sci.
PRCIEI
0795
0961-8368
4
960
972
7663352
Crystal structure of human pepsin and its complex with pepstatin.
1995
UK
J.Mol.Biol.
JMOBAK
0070
0022-2836
214
143
Molecular and Crystal Structures of Monoclinic Porcine Pepsin Refined at 1.8 Angstroms Resolution
1990
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
AREA DETECTOR
1994-06-17
SAN DIEGO MULTIWIRE DETECTION SYSTEM
x-ray
1
1.5418
1.0
1.5418
ROTATING ANODE
34631.887
PEPSIN 3A
3.4.23.1
1
man
polymer
685.891
PEPSTATIN
1
man
polymer
18.015
water
234
nat
water
no
no
VDEQPLENYLDMEYFGTIGIGTPAQDFTVVFDTGSSNLWVPSVYCSSLACTNHNRFNPEDSSTYQSTSETVSITYGTGSM
TGILGYDTVQVGGISDTNQIFGLSETEPGSFLYYAPFDGILGLAYPSISSSGATPVFDNIWNQGLVSQDLFSVYLSADDQ
SGSVVIFGGIDSSYYTGSLNWVPVTVEGYWQITVDSITMNGEAIACAEGCQAIVDTGTSLLTGPTSPIANIQSDIGASEN
SDGDMVVSCSAISSLPDIVFTINGVQYPVPPSAYILQSEGSCISGFQGMNLPTESGELWILGDVFIRQYFTVFDRANNQV
GLAPVA
VDEQPLENYLDMEYFGTIGIGTPAQDFTVVFDTGSSNLWVPSVYCSSLACTNHNRFNPEDSSTYQSTSETVSITYGTGSM
TGILGYDTVQVGGISDTNQIFGLSETEPGSFLYYAPFDGILGLAYPSISSSGATPVFDNIWNQGLVSQDLFSVYLSADDQ
SGSVVIFGGIDSSYYTGSLNWVPVTVEGYWQITVDSITMNGEAIACAEGCQAIVDTGTSLLTGPTSPIANIQSDIGASEN
SDGDMVVSCSAISSLPDIVFTINGVQYPVPPSAYILQSEGSCISGFQGMNLPTESGELWILGDVFIRQYFTVFDRANNQV
GLAPVA
E
polypeptide(L)
no
yes
(IVA)VV(STA)A(STA)
XVVXAX
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
n
n
human
sample
9606
Homo sapiens
sample
285516
Streptomyces argenteolus subsp. toyonakensis
1
3.24
59.7
repository
Initial release
Version format compliance
Atomic model
Database references
Derived calculations
Non-polymer description
Structure summary
Version format compliance
Other
1
0
1995-04-20
1
1
2008-03-24
1
2
2011-07-13
1
3
2013-02-27
Y
1995-01-23
REL
REL
HOH
water
Enzyme inhibitor
Pepstatin
Oligopeptide
HOH
1
3
HOH
HOH
327
E
HOH
2
3
HOH
HOH
328
E
HOH
3
3
HOH
HOH
329
E
HOH
4
3
HOH
HOH
330
E
HOH
5
3
HOH
HOH
331
E
HOH
6
3
HOH
HOH
332
E
HOH
7
3
HOH
HOH
333
E
HOH
8
3
HOH
HOH
334
E
HOH
9
3
HOH
HOH
335
E
HOH
10
3
HOH
HOH
336
E
HOH
11
3
HOH
HOH
337
E
HOH
12
3
HOH
HOH
338
E
HOH
13
3
HOH
HOH
339
E
HOH
14
3
HOH
HOH
340
E
HOH
15
3
HOH
HOH
341
E
HOH
16
3
HOH
HOH
342
E
HOH
17
3
HOH
HOH
343
E
HOH
18
3
HOH
HOH
344
E
HOH
19
3
HOH
HOH
345
E
HOH
20
3
HOH
HOH
346
E
HOH
21
3
HOH
HOH
347
E
HOH
22
3
HOH
HOH
348
E
HOH
23
3
HOH
HOH
349
E
HOH
24
3
HOH
HOH
350
E
HOH
25
3
HOH
HOH
351
E
HOH
26
3
HOH
HOH
352
E
HOH
27
3
HOH
HOH
353
E
HOH
28
3
HOH
HOH
354
E
HOH
29
3
HOH
HOH
355
E
HOH
30
3
HOH
HOH
356
E
HOH
31
3
HOH
HOH
357
E
HOH
32
3
HOH
HOH
358
E
HOH
33
3
HOH
HOH
359
E
HOH
34
3
HOH
HOH
360
E
HOH
35
3
HOH
HOH
361
E
HOH
36
3
HOH
HOH
362
E
HOH
37
3
HOH
HOH
363
E
HOH
38
3
HOH
HOH
364
E
HOH
39
3
HOH
HOH
365
E
HOH
40
3
HOH
HOH
366
E
HOH
41
3
HOH
HOH
367
E
HOH
42
3
HOH
HOH
368
E
HOH
43
3
HOH
HOH
369
E
HOH
44
3
HOH
HOH
370
E
HOH
45
3
HOH
HOH
371
E
HOH
46
3
HOH
HOH
372
E
HOH
47
3
HOH
HOH
373
E
HOH
48
3
HOH
HOH
374
E
HOH
49
3
HOH
HOH
375
E
HOH
50
3
HOH
HOH
376
E
HOH
51
3
HOH
HOH
377
E
HOH
52
3
HOH
HOH
378
E
HOH
53
3
HOH
HOH
379
E
HOH
54
3
HOH
HOH
380
E
HOH
55
3
HOH
HOH
381
E
HOH
56
3
HOH
HOH
382
E
HOH
57
3
HOH
HOH
383
E
HOH
58
3
HOH
HOH
384
E
HOH
59
3
HOH
HOH
385
E
HOH
60
3
HOH
HOH
386
E
HOH
61
3
HOH
HOH
387
E
HOH
62
3
HOH
HOH
388
E
HOH
63
3
HOH
HOH
389
E
HOH
64
3
HOH
HOH
390
E
HOH
65
3
HOH
HOH
391
E
HOH
66
3
HOH
HOH
392
E
HOH
67
3
HOH
HOH
393
E
HOH
68
3
HOH
HOH
394
E
HOH
69
3
HOH
HOH
395
E
HOH
70
3
HOH
HOH
396
E
HOH
71
3
HOH
HOH
397
E
HOH
72
3
HOH
HOH
398
E
HOH
73
3
HOH
HOH
399
E
HOH
74
3
HOH
HOH
400
E
HOH
75
3
HOH
HOH
401
E
HOH
76
3
HOH
HOH
402
E
HOH
77
3
HOH
HOH
403
E
HOH
78
3
HOH
HOH
404
E
HOH
79
3
HOH
HOH
405
E
HOH
80
3
HOH
HOH
406
E
HOH
81
3
HOH
HOH
407
E
HOH
82
3
HOH
HOH
408
E
HOH
83
3
HOH
HOH
409
E
HOH
84
3
HOH
HOH
410
E
HOH
85
3
HOH
HOH
411
E
HOH
86
3
HOH
HOH
412
E
HOH
87
3
HOH
HOH
413
E
HOH
88
3
HOH
HOH
414
E
HOH
89
3
HOH
HOH
415
E
HOH
90
3
HOH
HOH
416
E
HOH
91
3
HOH
HOH
417
E
HOH
92
3
HOH
HOH
418
E
HOH
93
3
HOH
HOH
419
E
HOH
94
3
HOH
HOH
420
E
HOH
95
3
HOH
HOH
421
E
HOH
96
3
HOH
HOH
422
E
HOH
97
3
HOH
HOH
423
E
HOH
98
3
HOH
HOH
424
E
HOH
99
3
HOH
HOH
425
E
HOH
100
3
HOH
HOH
426
E
HOH
101
3
HOH
HOH
427
E
HOH
102
3
HOH
HOH
428
E
HOH
103
3
HOH
HOH
429
E
HOH
104
3
HOH
HOH
430
E
HOH
105
3
HOH
HOH
431
E
HOH
106
3
HOH
HOH
432
E
HOH
107
3
HOH
HOH
433
E
HOH
108
3
HOH
HOH
434
E
HOH
109
3
HOH
HOH
435
E
HOH
110
3
HOH
HOH
436
E
HOH
111
3
HOH
HOH
437
E
HOH
112
3
HOH
HOH
438
E
HOH
113
3
HOH
HOH
439
E
HOH
114
3
HOH
HOH
440
E
HOH
115
3
HOH
HOH
441
E
HOH
116
3
HOH
HOH
442
E
HOH
117
3
HOH
HOH
443
E
HOH
118
3
HOH
HOH
444
E
HOH
119
3
HOH
HOH
445
E
HOH
120
3
HOH
HOH
446
E
HOH
121
3
HOH
HOH
447
E
HOH
122
3
HOH
HOH
448
E
HOH
123
3
HOH
HOH
449
E
HOH
124
3
HOH
HOH
450
E
HOH
125
3
HOH
HOH
451
E
HOH
126
3
HOH
HOH
452
E
HOH
127
3
HOH
HOH
453
E
HOH
128
3
HOH
HOH
454
E
HOH
129
3
HOH
HOH
455
E
HOH
130
3
HOH
HOH
456
E
HOH
131
3
HOH
HOH
457
E
HOH
132
3
HOH
HOH
458
E
HOH
133
3
HOH
HOH
459
E
HOH
134
3
HOH
HOH
460
E
HOH
135
3
HOH
HOH
461
E
HOH
136
3
HOH
HOH
462
E
HOH
137
3
HOH
HOH
463
E
HOH
138
3
HOH
HOH
464
E
HOH
139
3
HOH
HOH
465
E
HOH
140
3
HOH
HOH
466
E
HOH
141
3
HOH
HOH
467
E
HOH
142
3
HOH
HOH
468
E
HOH
143
3
HOH
HOH
469
E
HOH
144
3
HOH
HOH
470
E
HOH
145
3
HOH
HOH
471
E
HOH
146
3
HOH
HOH
472
E
HOH
147
3
HOH
HOH
473
E
HOH
148
3
HOH
HOH
474
E
HOH
149
3
HOH
HOH
475
E
HOH
150
3
HOH
HOH
476
E
HOH
151
3
HOH
HOH
477
E
HOH
152
3
HOH
HOH
478
E
HOH
153
3
HOH
HOH
479
E
HOH
154
3
HOH
HOH
480
E
HOH
155
3
HOH
HOH
481
E
HOH
157
3
HOH
HOH
482
E
HOH
158
3
HOH
HOH
483
E
HOH
159
3
HOH
HOH
484
E
HOH
160
3
HOH
HOH
485
E
HOH
161
3
HOH
HOH
486
E
HOH
162
3
HOH
HOH
487
E
HOH
163
3
HOH
HOH
488
E
HOH
164
3
HOH
HOH
489
E
HOH
165
3
HOH
HOH
490
E
HOH
166
3
HOH
HOH
491
E
HOH
167
3
HOH
HOH
492
E
HOH
168
3
HOH
HOH
493
E
HOH
169
3
HOH
HOH
494
E
HOH
170
3
HOH
HOH
495
E
HOH
171
3
HOH
HOH
496
E
HOH
172
3
HOH
HOH
497
E
HOH
173
3
HOH
HOH
498
E
HOH
174
3
HOH
HOH
499
E
HOH
175
3
HOH
HOH
500
E
HOH
176
3
HOH
HOH
501
E
HOH
177
3
HOH
HOH
502
E
HOH
178
3
HOH
HOH
503
E
HOH
179
3
HOH
HOH
504
E
HOH
180
3
HOH
HOH
505
E
HOH
181
3
HOH
HOH
506
E
HOH
182
3
HOH
HOH
507
E
HOH
183
3
HOH
HOH
508
E
HOH
184
3
HOH
HOH
509
E
HOH
185
3
HOH
HOH
510
E
HOH
186
3
HOH
HOH
511
E
HOH
187
3
HOH
HOH
512
E
HOH
188
3
HOH
HOH
513
E
HOH
189
3
HOH
HOH
514
E
HOH
190
3
HOH
HOH
515
E
HOH
191
3
HOH
HOH
516
E
HOH
192
3
HOH
HOH
517
E
HOH
193
3
HOH
HOH
518
E
HOH
194
3
HOH
HOH
519
E
HOH
195
3
HOH
HOH
520
E
HOH
196
3
HOH
HOH
521
E
HOH
197
3
HOH
HOH
522
E
HOH
198
3
HOH
HOH
523
E
HOH
199
3
HOH
HOH
524
E
HOH
200
3
HOH
HOH
525
E
HOH
201
3
HOH
HOH
526
E
HOH
202
3
HOH
HOH
527
E
HOH
203
3
HOH
HOH
528
E
HOH
204
3
HOH
HOH
529
E
HOH
205
3
HOH
HOH
530
E
HOH
206
3
HOH
HOH
531
E
HOH
207
3
HOH
HOH
532
E
HOH
208
3
HOH
HOH
533
E
HOH
209
3
HOH
HOH
534
E
HOH
210
3
HOH
HOH
535
E
HOH
211
3
HOH
HOH
536
E
HOH
212
3
HOH
HOH
537
E
HOH
213
3
HOH
HOH
538
E
HOH
214
3
HOH
HOH
539
E
HOH
215
3
HOH
HOH
540
E
HOH
216
3
HOH
HOH
541
E
HOH
217
3
HOH
HOH
542
E
HOH
218
3
HOH
HOH
543
E
HOH
219
3
HOH
HOH
544
E
HOH
220
3
HOH
HOH
545
E
HOH
221
3
HOH
HOH
546
E
HOH
222
3
HOH
HOH
547
E
HOH
223
3
HOH
HOH
548
E
HOH
224
3
HOH
HOH
549
E
HOH
225
3
HOH
HOH
550
E
HOH
226
3
HOH
HOH
551
E
HOH
227
3
HOH
HOH
552
E
HOH
228
3
HOH
HOH
553
E
HOH
229
3
HOH
HOH
554
E
HOH
230
3
HOH
HOH
555
E
HOH
231
3
HOH
HOH
556
E
HOH
232
3
HOH
HOH
557
E
HOH
233
3
HOH
HOH
558
E
HOH
234
3
HOH
HOH
559
E
HOH
156
3
HOH
HOH
156
I
VAL
1
n
1
VAL
1
E
ASP
2
n
2
ASP
2
E
GLU
3
n
3
GLU
3
E
GLN
4
n
4
GLN
4
E
PRO
5
n
5
PRO
5
E
LEU
6
n
6
LEU
6
E
GLU
7
n
7
GLU
7
E
ASN
8
n
8
ASN
8
E
TYR
9
n
9
TYR
9
E
LEU
10
n
10
LEU
10
E
ASP
11
n
11
ASP
11
E
MET
12
n
12
MET
12
E
GLU
13
n
13
GLU
13
E
TYR
14
n
14
TYR
14
E
PHE
15
n
15
PHE
15
E
GLY
16
n
16
GLY
16
E
THR
17
n
17
THR
17
E
ILE
18
n
18
ILE
18
E
GLY
19
n
19
GLY
19
E
ILE
20
n
20
ILE
20
E
GLY
21
n
21
GLY
21
E
THR
22
n
22
THR
22
E
PRO
23
n
23
PRO
23
E
ALA
24
n
24
ALA
24
E
GLN
25
n
25
GLN
25
E
ASP
26
n
26
ASP
26
E
PHE
27
n
27
PHE
27
E
THR
28
n
28
THR
28
E
VAL
29
n
29
VAL
29
E
VAL
30
n
30
VAL
30
E
PHE
31
n
31
PHE
31
E
ASP
32
n
32
ASP
32
E
THR
33
n
33
THR
33
E
GLY
34
n
34
GLY
34
E
SER
35
n
35
SER
35
E
SER
36
n
36
SER
36
E
ASN
37
n
37
ASN
37
E
LEU
38
n
38
LEU
38
E
TRP
39
n
39
TRP
39
E
VAL
40
n
40
VAL
40
E
PRO
41
n
41
PRO
41
E
SER
42
n
42
SER
42
E
VAL
43
n
43
VAL
43
E
TYR
44
n
44
TYR
44
E
CYS
45
n
45
CYS
45
E
SER
46
n
46
SER
46
E
SER
47
n
47
SER
47
E
LEU
48
n
48
LEU
48
E
ALA
49
n
49
ALA
49
E
CYS
50
n
50
CYS
50
E
THR
51
n
51
THR
51
E
ASN
52
n
52
ASN
52
E
HIS
53
n
53
HIS
53
E
ASN
54
n
54
ASN
54
E
ARG
55
n
55
ARG
55
E
PHE
56
n
56
PHE
56
E
ASN
57
n
57
ASN
57
E
PRO
58
n
58
PRO
58
E
GLU
59
n
59
GLU
59
E
ASP
60
n
60
ASP
60
E
SER
61
n
61
SER
61
E
SER
62
n
62
SER
62
E
THR
63
n
63
THR
63
E
TYR
64
n
64
TYR
64
E
GLN
65
n
65
GLN
65
E
SER
66
n
66
SER
66
E
THR
67
n
67
THR
67
E
SER
68
n
68
SER
68
E
GLU
69
n
69
GLU
69
E
THR
70
n
70
THR
70
E
VAL
71
n
71
VAL
71
E
SER
72
n
72
SER
72
E
ILE
73
n
73
ILE
73
E
THR
74
n
74
THR
74
E
TYR
75
n
75
TYR
75
E
GLY
76
n
76
GLY
76
E
THR
77
n
77
THR
77
E
GLY
78
n
78
GLY
78
E
SER
79
n
79
SER
79
E
MET
80
n
80
MET
80
E
THR
81
n
81
THR
81
E
GLY
82
n
82
GLY
82
E
ILE
83
n
83
ILE
83
E
LEU
84
n
84
LEU
84
E
GLY
85
n
85
GLY
85
E
TYR
86
n
86
TYR
86
E
ASP
87
n
87
ASP
87
E
THR
88
n
88
THR
88
E
VAL
89
n
89
VAL
89
E
GLN
90
n
90
GLN
90
E
VAL
91
n
91
VAL
91
E
GLY
92
n
92
GLY
92
E
GLY
93
n
93
GLY
93
E
ILE
94
n
94
ILE
94
E
SER
95
n
95
SER
95
E
ASP
96
n
96
ASP
96
E
THR
97
n
97
THR
97
E
ASN
98
n
98
ASN
98
E
GLN
99
n
99
GLN
99
E
ILE
100
n
100
ILE
100
E
PHE
101
n
101
PHE
101
E
GLY
102
n
102
GLY
102
E
LEU
103
n
103
LEU
103
E
SER
104
n
104
SER
104
E
GLU
105
n
105
GLU
105
E
THR
106
n
106
THR
106
E
GLU
107
n
107
GLU
107
E
PRO
108
n
108
PRO
108
E
GLY
109
n
109
GLY
109
E
SER
110
n
110
SER
110
E
PHE
111
n
111
PHE
111
E
LEU
112
n
112
LEU
112
E
TYR
113
n
113
TYR
113
E
TYR
114
n
114
TYR
114
E
ALA
115
n
115
ALA
115
E
PRO
116
n
116
PRO
116
E
PHE
117
n
117
PHE
117
E
ASP
118
n
118
ASP
118
E
GLY
119
n
119
GLY
119
E
ILE
120
n
120
ILE
120
E
LEU
121
n
121
LEU
121
E
GLY
122
n
122
GLY
122
E
LEU
123
n
123
LEU
123
E
ALA
124
n
124
ALA
124
E
TYR
125
n
125
TYR
125
E
PRO
126
n
126
PRO
126
E
SER
127
n
127
SER
127
E
ILE
128
n
128
ILE
128
E
SER
129
n
129
SER
129
E
SER
130
n
130
SER
130
E
SER
131
n
131
SER
131
E
GLY
132
n
132
GLY
132
E
ALA
133
n
133
ALA
133
E
THR
134
n
134
THR
134
E
PRO
135
n
135
PRO
135
E
VAL
136
n
136
VAL
136
E
PHE
137
n
137
PHE
137
E
ASP
138
n
138
ASP
138
E
ASN
139
n
139
ASN
139
E
ILE
140
n
140
ILE
140
E
TRP
141
n
141
TRP
141
E
ASN
142
n
142
ASN
142
E
GLN
143
n
143
GLN
143
E
GLY
144
n
144
GLY
144
E
LEU
145
n
145
LEU
145
E
VAL
146
n
146
VAL
146
E
SER
147
n
147
SER
147
E
GLN
148
n
148
GLN
148
E
ASP
149
n
149
ASP
149
E
LEU
150
n
150
LEU
150
E
PHE
151
n
151
PHE
151
E
SER
152
n
152
SER
152
E
VAL
153
n
153
VAL
153
E
TYR
154
n
154
TYR
154
E
LEU
155
n
155
LEU
155
E
SER
156
n
156
SER
156
E
ALA
157
n
157
ALA
157
E
ASP
158
n
158
ASP
158
E
ASP
159
n
159
ASP
159
E
GLN
160
n
160
GLN
160
E
SER
161
n
161
SER
161
E
GLY
162
n
162
GLY
162
E
SER
163
n
163
SER
163
E
VAL
164
n
164
VAL
164
E
VAL
165
n
165
VAL
165
E
ILE
166
n
166
ILE
166
E
PHE
167
n
167
PHE
167
E
GLY
168
n
168
GLY
168
E
GLY
169
n
169
GLY
169
E
ILE
170
n
170
ILE
170
E
ASP
171
n
171
ASP
171
E
SER
172
n
172
SER
172
E
SER
173
n
173
SER
173
E
TYR
174
n
174
TYR
174
E
TYR
175
n
175
TYR
175
E
THR
176
n
176
THR
176
E
GLY
177
n
177
GLY
177
E
SER
178
n
178
SER
178
E
LEU
179
n
179
LEU
179
E
ASN
180
n
180
ASN
180
E
TRP
181
n
181
TRP
181
E
VAL
182
n
182
VAL
182
E
PRO
183
n
183
PRO
183
E
VAL
184
n
184
VAL
184
E
THR
185
n
185
THR
185
E
VAL
186
n
186
VAL
186
E
GLU
187
n
187
GLU
187
E
GLY
188
n
188
GLY
188
E
TYR
189
n
189
TYR
189
E
TRP
190
n
190
TRP
190
E
GLN
191
n
191
GLN
191
E
ILE
192
n
192
ILE
192
E
THR
193
n
193
THR
193
E
VAL
194
n
194
VAL
194
E
ASP
195
n
195
ASP
195
E
SER
196
n
196
SER
196
E
ILE
197
n
197
ILE
197
E
THR
198
n
198
THR
198
E
MET
199
n
199
MET
199
E
ASN
200
n
200
ASN
200
E
GLY
201
n
201
GLY
201
E
GLU
202
n
202
GLU
202
E
ALA
203
n
203
ALA
203
E
ILE
204
n
204
ILE
204
E
ALA
205
n
205
ALA
205
E
CYS
206
n
206
CYS
206
E
ALA
207
n
207
ALA
207
E
GLU
208
n
208
GLU
208
E
GLY
209
n
209
GLY
209
E
CYS
210
n
210
CYS
210
E
GLN
211
n
211
GLN
211
E
ALA
212
n
212
ALA
212
E
ILE
213
n
213
ILE
213
E
VAL
214
n
214
VAL
214
E
ASP
215
n
215
ASP
215
E
THR
216
n
216
THR
216
E
GLY
217
n
217
GLY
217
E
THR
218
n
218
THR
218
E
SER
219
n
219
SER
219
E
LEU
220
n
220
LEU
220
E
LEU
221
n
221
LEU
221
E
THR
222
n
222
THR
222
E
GLY
223
n
223
GLY
223
E
PRO
224
n
224
PRO
224
E
THR
225
n
225
THR
225
E
SER
226
n
226
SER
226
E
PRO
227
n
227
PRO
227
E
ILE
228
n
228
ILE
228
E
ALA
229
n
229
ALA
229
E
ASN
230
n
230
ASN
230
E
ILE
231
n
231
ILE
231
E
GLN
232
n
232
GLN
232
E
SER
233
n
233
SER
233
E
ASP
234
n
234
ASP
234
E
ILE
235
n
235
ILE
235
E
GLY
236
n
236
GLY
236
E
ALA
237
n
237
ALA
237
E
SER
238
n
238
SER
238
E
GLU
239
n
239
GLU
239
E
ASN
240
n
240
ASN
240
E
SER
241
n
241
SER
241
E
ASP
242
n
242
ASP
242
E
GLY
243
n
243
GLY
243
E
ASP
244
n
244
ASP
244
E
MET
245
n
245
MET
245
E
VAL
246
n
246
VAL
246
E
VAL
247
n
247
VAL
247
E
SER
248
n
248
SER
248
E
CYS
249
n
249
CYS
249
E
SER
250
n
250
SER
250
E
ALA
251
n
251
ALA
251
E
ILE
252
n
252
ILE
252
E
SER
253
n
253
SER
253
E
SER
254
n
254
SER
254
E
LEU
255
n
255
LEU
255
E
PRO
256
n
256
PRO
256
E
ASP
257
n
257
ASP
257
E
ILE
258
n
258
ILE
258
E
VAL
259
n
259
VAL
259
E
PHE
260
n
260
PHE
260
E
THR
261
n
261
THR
261
E
ILE
262
n
262
ILE
262
E
ASN
263
n
263
ASN
263
E
GLY
264
n
264
GLY
264
E
VAL
265
n
265
VAL
265
E
GLN
266
n
266
GLN
266
E
TYR
267
n
267
TYR
267
E
PRO
268
n
268
PRO
268
E
VAL
269
n
269
VAL
269
E
PRO
270
n
270
PRO
270
E
PRO
271
n
271
PRO
271
E
SER
272
n
272
SER
272
E
ALA
273
n
273
ALA
273
E
TYR
274
n
274
TYR
274
E
ILE
275
n
275
ILE
275
E
LEU
276
n
276
LEU
276
E
GLN
277
n
277
GLN
277
E
SER
278
n
278
SER
278
E
GLU
279
n
279
GLU
279
E
GLY
280
n
280
GLY
280
E
SER
281
n
281
SER
281
E
CYS
282
n
282
CYS
282
E
ILE
283
n
283
ILE
283
E
SER
284
n
284
SER
284
E
GLY
285
n
285
GLY
285
E
PHE
286
n
286
PHE
286
E
GLN
287
n
287
GLN
287
E
GLY
288
n
288
GLY
288
E
MET
289
n
289
MET
289
E
ASN
290
n
290
ASN
290
E
LEU
291
n
291
LEU
291
E
PRO
292
n
292
PRO
292
E
THR
293
n
293
THR
293
E
GLU
294
n
294
GLU
294
E
SER
295
n
295
SER
295
E
GLY
296
n
296
GLY
296
E
GLU
297
n
297
GLU
297
E
LEU
298
n
298
LEU
298
E
TRP
299
n
299
TRP
299
E
ILE
300
n
300
ILE
300
E
LEU
301
n
301
LEU
301
E
GLY
302
n
302
GLY
302
E
ASP
303
n
303
ASP
303
E
VAL
304
n
304
VAL
304
E
PHE
305
n
305
PHE
305
E
ILE
306
n
306
ILE
306
E
ARG
307
n
307
ARG
307
E
GLN
308
n
308
GLN
308
E
TYR
309
n
309
TYR
309
E
PHE
310
n
310
PHE
310
E
THR
311
n
311
THR
311
E
VAL
312
n
312
VAL
312
E
PHE
313
n
313
PHE
313
E
ASP
314
n
314
ASP
314
E
ARG
315
n
315
ARG
315
E
ALA
316
n
316
ALA
316
E
ASN
317
n
317
ASN
317
E
ASN
318
n
318
ASN
318
E
GLN
319
n
319
GLN
319
E
VAL
320
n
320
VAL
320
E
GLY
321
n
321
GLY
321
E
LEU
322
n
322
LEU
322
E
ALA
323
n
323
ALA
323
E
PRO
324
n
324
PRO
324
E
VAL
325
n
325
VAL
325
E
ALA
326
n
326
ALA
326
E
IVA
1
n
1
IVA
1
I
VAL
2
n
2
VAL
2
I
VAL
3
n
3
VAL
3
I
STA
4
n
4
STA
4
I
ALA
5
n
5
ALA
5
I
STA
6
n
6
STA
6
I
author_and_software_defined_assembly
PISA
2
dimeric
1360
-11
13010
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
E
O
ASP
2
A
O
ASP
2
E
N
PHE
167
A
N
PHE
167
E
O
VAL
164
A
O
VAL
164
E
N
TYR
154
A
N
TYR
154
E
O
PHE
151
A
O
PHE
151
E
N
PHE
313
A
N
PHE
313
E
O
PHE
310
A
O
PHE
310
E
N
ALA
323
A
N
ALA
323
E
O
VAL
320
A
O
VAL
320
E
N
VAL
182
A
N
VAL
182
E
O
GLU
7
A
O
GLU
7
E
N
PHE
15
A
N
PHE
15
E
O
GLY
16
A
O
GLY
16
E
N
VAL
29
A
N
VAL
29
E
O
VAL
30
A
O
VAL
30
E
N
GLY
119
A
N
GLY
119
E
O
VAL
40
A
O
VAL
40
E
N
GLY
102
A
N
GLY
102
E
O
GLN
99
A
O
GLN
99
E
N
ASP
87
A
N
ASP
87
E
O
MET
80
A
O
MET
80
E
N
ILE
73
A
N
ILE
73
E
O
VAL
89
A
O
VAL
89
E
N
ASP
96
A
N
ASP
96
E
O
ILE
192
A
O
ILE
192
E
N
ALA
212
A
N
ALA
212
E
O
ILE
213
A
O
ILE
213
E
N
TRP
299
A
N
TRP
299
E
O
VAL
265
A
O
VAL
265
E
N
ILE
262
A
N
ILE
262
E
O
VAL
259
A
O
VAL
259
E
N
THR
198
A
N
THR
198
E
O
ILE
197
A
O
ILE
197
E
N
ALA
205
A
N
ALA
205
E
O
LEU
221
A
O
LEU
221
E
N
GLN
287
A
N
GLN
287
E
O
LEU
276
A
O
LEU
276
E
N
ILE
283
A
N
ILE
283
1
E
N
SER
295
A
N
SER
295
0
Y
1
E
VAL
1
A
VAL
1
0
Y
1
E
GLU
239
A
GLU
239
0
Y
1
E
ASN
240
A
ASN
240
0
Y
1
E
SER
241
A
SER
241
0
Y
1
E
ASP
242
A
ASP
242
0
Y
1
E
GLY
243
A
GLY
243
0
Y
1
E
GLU
294
A
GLU
294
0
Y
1
E
GLY
169
10.04
1
E
SER
281
12.66
1
I
STA
4
28.40
1
I
I
STA
ALA
4
5
-132.11
1
E
PHE
111
0.079
SIDE CHAIN
1
E
TYR
113
0.066
SIDE CHAIN
1
3.92
0.50
120.30
124.22
E
E
E
NE
CZ
NH1
ARG
ARG
ARG
55
55
55
N
1
-4.09
0.60
121.00
116.91
E
E
E
CB
CG
CD2
TYR
TYR
TYR
189
189
189
N
1
-3.96
0.60
121.00
117.04
E
E
E
CB
CG
CD2
TYR
TYR
TYR
267
267
267
N
1
E
ASP
159
56.38
17.74
1
E
GLU
279
35.95
41.20
23.0
RESIDUES WITH ZERO OCCUPANCIES AND NEGATIVE B-FACTORS
ARE DISORDERED AND THEIR POSITIONS ARE NOT CONSIDERED
TO HAVE BEEN DETERMINED.
0.185
2.0
30.0
30584
98.6
1
0.0
2.0
30.0
234
2720
0
0
2486
0.011
2.46
2.75
1PSO
31184
0.0
1
97.0
refinement
GROMOS
data reduction
SAN
DIEGO SOFTWARE
PEPSIN 3A (E.C.3.4.23.1) COMPLEXED WITH PEPSTATIN
The crystal structure of human pepsin and its complex with pepstatin
1
N
N
2
N
N
3
N
N
3
N
N
E
LEU
48
A
LEU
48
HELX_P
E
ASN
52
A
ASN
52
1
1
5
E
PRO
58
A
PRO
58
HELX_P
E
ASP
60
A
ASP
60
5
2
3
E
PHE
111
A
PHE
111
HELX_P
E
TYR
114
A
TYR
114
1
3
4
E
PRO
126
A
PRO
126
HELX_P
E
ILE
128
A
ILE
128
5
4
3
E
SER
130
A
SER
130
HELX_P
E
GLY
132
A
GLY
132
5
5
3
E
VAL
136
A
VAL
136
HELX_P
E
ASN
142
A
ASN
142
1
6
7
E
SER
172
A
SER
172
HELX_P
E
TYR
174
A
TYR
174
5
7
3
E
THR
225
A
THR
225
HELX_P
E
ASP
234
A
ASP
234
1
8
10
E
CYS
249
A
CYS
249
HELX_P
E
SER
254
A
SER
254
5
9
6
E
PRO
271
A
PRO
271
HELX_P
E
TYR
274
A
TYR
274
1
10
4
E
ASP
303
A
ASP
303
HELX_P
E
ILE
306
A
ILE
306
1
11
4
disulf
2.019
E
CYS
45
A
SG
CYS
45
1_555
E
CYS
50
A
SG
CYS
50
1_555
disulf
2.051
E
CYS
206
A
SG
CYS
206
1_555
E
CYS
210
A
SG
CYS
210
1_555
disulf
2.049
E
CYS
249
A
SG
CYS
249
1_555
E
CYS
282
A
SG
CYS
282
1_555
covale
1.311
I
IVA
1
B
C
IVA
1
1_555
I
VAL
2
B
N
VAL
2
1_555
covale
1.319
I
VAL
3
B
C
VAL
3
1_555
I
STA
4
B
N
STA
4
1_555
covale
1.326
I
STA
4
B
C
STA
4
1_555
I
ALA
5
B
N
ALA
5
1_555
covale
1.336
I
ALA
5
B
C
ALA
5
1_555
I
STA
6
B
N
STA
6
1_555
HYDROLASE/HYDROLASE INHIBITOR
ACID PROTEINASE, HYDROLASE-HYDROLASE INHIBITOR complex
E
THR
22
A
THR
22
1
E
PRO
23
A
PRO
23
-2.96
PEPA_HUMAN
UNP
1
1
P00790
MKWLLLLGLVALSECIMYKVPLIRKKSLRRTLSERGLLKDFLKKHNLNPARKYFPQWEAPTLVDEQPLENYLDMEYFGTI
GIGTPAQDFTVVFDTGSSNLWVPSVYCSSLACTNHNRFNPEDSSTYQSTSETVSITYGTGSMTGILGYDTVQVGGISDTN
QIFGLSETEPGSFLYYAPFDGILGLAYPSISSSGATPVFDNIWNQGLVSQDLFSVYLSADDQSGSVVIFGGIDSSYYTGS
LNWVPVTVEGYWQITVDSITMNGEAIACAEGCQAIVDTGTSLLTGPTSPIANIQSDIGASENSDGDMVVSCSAISSLPDI
VFTINGVQYPVPPSAYILQSEGSCISGFQGMNLPTESGELWILGDVFIRQYFTVFDRANNQVGLAPVA
1PSO
PDB
2
1PSO
63
388
1PSO
1
326
P00790
E
1
1
326
1
6
1PSO
1
6
1PSO
I
2
1
6
6
4
4
2
3
4
2
2
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
parallel
parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
parallel
anti-parallel
anti-parallel
anti-parallel
parallel
anti-parallel
E
ASP
2
A
ASP
2
E
PRO
5
A
PRO
5
E
VAL
164
A
VAL
164
E
PHE
167
A
PHE
167
E
LEU
150
A
LEU
150
E
TYR
154
A
TYR
154
E
TYR
309
A
TYR
309
E
ASP
314
A
ASP
314
E
GLN
319
A
GLN
319
E
PRO
324
A
PRO
324
E
ASN
180
A
ASN
180
E
PRO
183
A
PRO
183
E
GLU
7
A
GLU
7
E
TYR
9
A
TYR
9
E
GLU
13
A
GLU
13
E
ILE
20
A
ILE
20
E
GLN
25
A
GLN
25
E
ASP
32
A
ASP
32
E
GLY
119
A
GLY
119
E
GLY
122
A
GLY
122
E
TRP
39
A
TRP
39
E
PRO
41
A
PRO
41
E
GLN
99
A
GLN
99
E
THR
106
A
THR
106
E
SER
79
A
SER
79
E
ASP
87
A
ASP
87
E
THR
70
A
THR
70
E
THR
74
A
THR
74
E
VAL
89
A
VAL
89
E
VAL
91
A
VAL
91
E
ILE
94
A
ILE
94
E
ASP
96
A
ASP
96
E
GLN
191
A
GLN
191
E
VAL
194
A
VAL
194
E
CYS
210
A
CYS
210
E
VAL
214
A
VAL
214
E
TRP
299
A
TRP
299
E
LEU
301
A
LEU
301
E
VAL
265
A
VAL
265
E
VAL
269
A
VAL
269
E
ILE
258
A
ILE
258
E
ILE
262
A
ILE
262
E
SER
196
A
SER
196
E
MET
199
A
MET
199
E
GLU
202
A
GLU
202
E
ALA
205
A
ALA
205
E
LEU
221
A
LEU
221
E
GLY
223
A
GLY
223
E
PHE
286
A
PHE
286
E
GLY
288
A
GLY
288
E
ILE
275
A
ILE
275
E
SER
278
A
SER
278
E
SER
281
A
SER
281
E
SER
284
A
SER
284
BINDING SITE FOR CHAIN I OF PEPSTATIN
Software
16
E
MET
12
A
MET
12
16
1_555
E
ASP
32
A
ASP
32
16
1_555
E
GLY
34
A
GLY
34
16
1_555
E
THR
74
A
THR
74
16
1_555
E
TYR
75
A
TYR
75
16
1_555
E
GLY
76
A
GLY
76
16
1_555
E
THR
77
A
THR
77
16
1_555
E
PHE
111
A
PHE
111
16
1_555
E
TYR
189
A
TYR
189
16
1_555
E
ASP
215
A
ASP
215
16
1_555
E
GLY
217
A
GLY
217
16
1_555
E
THR
218
A
THR
218
16
1_555
E
SER
219
A
SER
219
16
1_555
E
GLN
287
A
GLN
287
16
1_555
E
HOH
343
C
HOH
16
1_555
E
HOH
382
C
HOH
16
1_555
19
P 21 21 21