0.010741
0.006201
0.000000
0.000000
0.012403
0.000000
0.000000
0.000000
0.016000
0.00000
0.00000
0.00000
Perona, J.J.
Fletterick, R.J.
http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic
6
90.00
90.00
120.00
93.100
93.100
62.500
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
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
UK
J.Mol.Biol.
JMOBAK
0070
0022-2836
230
934
949
10.1006/jmbi.1993.1211
8478942
Relocating a negative charge in the binding pocket of trypsin.
1993
UK
J.Mol.Biol.
JMOBAK
0070
0022-2836
230
919
Crystal Structures of Rat Anionic Trypsin Complexed with the Protein Inhibitors Appi and Bpti
1993
US
Biochemistry
BICHAW
0033
0006-2960
29
10018
X-Ray Crystal Structure of the Protease Inhibitor Domain of Alzheimer'S Amyloid Beta-Protein Precursor
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
x-ray
1
1.0
23814.838
TRYPSIN
3.4.21.4
1
man
polymer
6261.992
AMYLOID BETA-PROTEIN PRECURSOR INHIBITOR DOMAIN (APPI)
1
man
polymer
18.015
water
141
nat
water
no
no
IVGGYTCQENSVPYQVSLNSGYHFCGGSLINDQWVVSAAHCYKSRIQVRLGEHNINVLEGNEQFVNAAKIIKHPNFDRKT
LNNDIMLIKLSSPVKLNARVATVALPSSCAPAGTQCLISGWGNTLSSGVNEPDLLQCLDAPLLPQADCEASYPGKITDNM
VCVGFLEGGKGSCQGDSGGPVVCNGELQGIVSWGYGCALPDNPDVYTKVCNYVDWIQDTIAAN
IVGGYTCQENSVPYQVSLNSGYHFCGGSLINDQWVVSAAHCYKSRIQVRLGEHNINVLEGNEQFVNAAKIIKHPNFDRKT
LNNDIMLIKLSSPVKLNARVATVALPSSCAPAGTQCLISGWGNTLSSGVNEPDLLQCLDAPLLPQADCEASYPGKITDNM
VCVGFLEGGKGSCQGDSGGPVVCNGELQGIVSWGYGCALPDNPDVYTKVCNYVDWIQDTIAAN
E
polypeptide(L)
no
no
VREVCSEQAETGPCRAMISRWYFDVTEGKCAPFFYGGCGGNRNNFDTEEYCMAVCG
VREVCSEQAETGPCRAMISRWYFDVTEGKCAPFFYGGCGGNRNNFDTEEYCMAVCG
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
Norway rat
Rattus
sample
10116
Rattus norvegicus
32644
unidentified
2.60
52.66
pdbx_database_status
struct_conf
struct_conf_type
repository
Initial release
Version format compliance
Version format compliance
Derived calculations
Other
1
0
1994-05-31
1
1
2008-03-03
1
2
2011-07-13
1
3
2017-11-29
_pdbx_database_status.process_site
Y
BNL
1992-12-17
REL
HOH
water
THE APPI INHIBITOR REPRESENTS A KUNITZ-TYPE (BPTI-LIKE)
SERINE PROTEASE INHIBITOR WHICH POSSESSES 45 PER CENT
SEQUENCE IDENTITY AND A HIGH DEGREE OF STRUCTURAL
SIMILARITY WITH BPTI. THIS INHIBITOR DOMAIN IS DERIVED
FROM THE AMYLOID BETA-PROTEIN PRECURSOR POLYPEPTIDE, AND IS
INVOLVED IN THE ABNORMAL DEPOSITION OF CEREBRAL AMYLOID
DEPOSITS IN INDIVIDUALS WITH ALZHEIMER'S DISEASE.
SEQUENCE ADVISORY NOTICE
DIFFERENCE BETWEEN SWISS-PROT AND PDB SEQUENCE.
SWISS-PROT ENTRY NAME: TRY2_RAT
SWISS-PROT RESIDUE PDB SEQRES
NAME NUMBER NAME CHAIN SEQ/INSERT CODE
ASP 84 ASN E 79
ILE 88 VAL E 83
THE SEQUENCE FOR TRYPSIN IN THIS STRUCTURE WAS TAKEN FROM
GENEMBL WHICH DIFFERS FROM THE SWISSPROT SEQUENCE.
HOH
248
3
HOH
HOH
248
E
HOH
249
3
HOH
HOH
249
E
HOH
250
3
HOH
HOH
250
E
HOH
251
3
HOH
HOH
251
E
HOH
252
3
HOH
HOH
252
E
HOH
253
3
HOH
HOH
253
E
HOH
254
3
HOH
HOH
254
E
HOH
255
3
HOH
HOH
255
E
HOH
256
3
HOH
HOH
256
E
HOH
258
3
HOH
HOH
258
E
HOH
259
3
HOH
HOH
259
E
HOH
261
3
HOH
HOH
261
E
HOH
262
3
HOH
HOH
262
E
HOH
263
3
HOH
HOH
263
E
HOH
265
3
HOH
HOH
265
E
HOH
266
3
HOH
HOH
266
E
HOH
267
3
HOH
HOH
267
E
HOH
268
3
HOH
HOH
268
E
HOH
269
3
HOH
HOH
269
E
HOH
271
3
HOH
HOH
271
E
HOH
272
3
HOH
HOH
272
E
HOH
273
3
HOH
HOH
273
E
HOH
274
3
HOH
HOH
274
E
HOH
275
3
HOH
HOH
275
E
HOH
277
3
HOH
HOH
277
E
HOH
278
3
HOH
HOH
278
E
HOH
279
3
HOH
HOH
279
E
HOH
282
3
HOH
HOH
282
E
HOH
285
3
HOH
HOH
285
E
HOH
287
3
HOH
HOH
287
E
HOH
290
3
HOH
HOH
290
E
HOH
291
3
HOH
HOH
291
E
HOH
294
3
HOH
HOH
294
E
HOH
298
3
HOH
HOH
298
E
HOH
299
3
HOH
HOH
299
E
HOH
301
3
HOH
HOH
301
E
HOH
304
3
HOH
HOH
304
E
HOH
306
3
HOH
HOH
306
E
HOH
307
3
HOH
HOH
307
E
HOH
308
3
HOH
HOH
308
E
HOH
310
3
HOH
HOH
310
E
HOH
311
3
HOH
HOH
311
E
HOH
312
3
HOH
HOH
312
E
HOH
315
3
HOH
HOH
315
E
HOH
317
3
HOH
HOH
317
E
HOH
318
3
HOH
HOH
318
E
HOH
320
3
HOH
HOH
320
E
HOH
323
3
HOH
HOH
323
E
HOH
325
3
HOH
HOH
325
E
HOH
328
3
HOH
HOH
328
E
HOH
329
3
HOH
HOH
329
E
HOH
332
3
HOH
HOH
332
E
HOH
333
3
HOH
HOH
333
E
HOH
334
3
HOH
HOH
334
E
HOH
335
3
HOH
HOH
335
E
HOH
336
3
HOH
HOH
336
E
HOH
339
3
HOH
HOH
339
E
HOH
340
3
HOH
HOH
340
E
HOH
342
3
HOH
HOH
342
E
HOH
344
3
HOH
HOH
344
E
HOH
346
3
HOH
HOH
346
E
HOH
348
3
HOH
HOH
348
E
HOH
349
3
HOH
HOH
349
E
HOH
350
3
HOH
HOH
350
E
HOH
354
3
HOH
HOH
354
E
HOH
355
3
HOH
HOH
355
E
HOH
371
3
HOH
HOH
371
E
HOH
387
3
HOH
HOH
387
E
HOH
395
3
HOH
HOH
395
E
HOH
403
3
HOH
HOH
403
E
HOH
409
3
HOH
HOH
409
E
HOH
416
3
HOH
HOH
416
E
HOH
417
3
HOH
HOH
417
E
HOH
419
3
HOH
HOH
419
E
HOH
420
3
HOH
HOH
420
E
HOH
422
3
HOH
HOH
422
E
HOH
423
3
HOH
HOH
423
E
HOH
424
3
HOH
HOH
424
E
HOH
425
3
HOH
HOH
425
E
HOH
427
3
HOH
HOH
427
E
HOH
428
3
HOH
HOH
428
E
HOH
429
3
HOH
HOH
429
E
HOH
430
3
HOH
HOH
430
E
HOH
431
3
HOH
HOH
431
E
HOH
432
3
HOH
HOH
432
E
HOH
433
3
HOH
HOH
433
E
HOH
434
3
HOH
HOH
434
E
HOH
435
3
HOH
HOH
435
E
HOH
436
3
HOH
HOH
436
E
HOH
437
3
HOH
HOH
437
E
HOH
438
3
HOH
HOH
438
E
HOH
439
3
HOH
HOH
439
E
HOH
440
3
HOH
HOH
440
E
HOH
441
3
HOH
HOH
441
E
HOH
442
3
HOH
HOH
442
E
HOH
443
3
HOH
HOH
443
E
HOH
444
3
HOH
HOH
444
E
HOH
445
3
HOH
HOH
445
E
HOH
446
3
HOH
HOH
446
E
HOH
447
3
HOH
HOH
447
E
HOH
448
3
HOH
HOH
448
E
HOH
453
3
HOH
HOH
453
E
HOH
455
3
HOH
HOH
455
E
HOH
456
3
HOH
HOH
456
E
HOH
458
3
HOH
HOH
458
E
HOH
460
3
HOH
HOH
460
E
HOH
461
3
HOH
HOH
461
E
HOH
462
3
HOH
HOH
462
E
HOH
463
3
HOH
HOH
463
E
HOH
464
3
HOH
HOH
464
E
HOH
465
3
HOH
HOH
465
E
HOH
466
3
HOH
HOH
466
E
HOH
467
3
HOH
HOH
467
E
HOH
468
3
HOH
HOH
468
E
HOH
469
3
HOH
HOH
469
E
HOH
470
3
HOH
HOH
470
E
HOH
471
3
HOH
HOH
471
E
HOH
472
3
HOH
HOH
472
E
HOH
477
3
HOH
HOH
477
E
HOH
479
3
HOH
HOH
479
E
HOH
480
3
HOH
HOH
480
E
HOH
481
3
HOH
HOH
481
E
HOH
257
3
HOH
HOH
257
I
HOH
331
3
HOH
HOH
331
I
HOH
363
3
HOH
HOH
363
I
HOH
364
3
HOH
HOH
364
I
HOH
365
3
HOH
HOH
365
I
HOH
370
3
HOH
HOH
370
I
HOH
375
3
HOH
HOH
375
I
HOH
381
3
HOH
HOH
381
I
HOH
382
3
HOH
HOH
382
I
HOH
383
3
HOH
HOH
383
I
HOH
386
3
HOH
HOH
386
I
HOH
400
3
HOH
HOH
400
I
HOH
404
3
HOH
HOH
404
I
HOH
407
3
HOH
HOH
407
I
HOH
408
3
HOH
HOH
408
I
HOH
415
3
HOH
HOH
415
I
HOH
418
3
HOH
HOH
418
I
HOH
473
3
HOH
HOH
473
I
HOH
475
3
HOH
HOH
475
I
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
GLN
23
n
8
GLN
23
E
GLU
24
n
9
GLU
24
E
ASN
25
n
10
ASN
25
E
SER
26
n
11
SER
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
ASP
49
n
32
ASP
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
ARG
62
n
45
ARG
62
E
ILE
63
n
46
ILE
63
E
GLN
64
n
47
GLN
64
E
VAL
66
n
48
VAL
66
E
ARG
67
n
49
ARG
67
E
LEU
68
n
50
LEU
68
E
GLY
69
n
51
GLY
69
E
GLU
70
n
52
GLU
70
E
HIS
71
n
53
HIS
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
LEU
76
n
58
LEU
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
VAL
83
n
65
VAL
83
E
ASN
84
n
66
ASN
84
E
ALA
85
n
67
ALA
85
E
ALA
86
n
68
ALA
86
E
LYS
87
n
69
LYS
87
E
ILE
88
n
70
ILE
88
E
ILE
89
n
71
ILE
89
E
LYS
90
n
72
LYS
90
E
HIS
91
n
73
HIS
91
E
PRO
92
n
74
PRO
92
E
ASN
93
n
75
ASN
93
E
PHE
94
n
76
PHE
94
E
ASP
95
n
77
ASP
95
E
ARG
96
n
78
ARG
96
E
LYS
97
n
79
LYS
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
SER
109
n
91
SER
109
E
SER
110
n
92
SER
110
E
PRO
111
n
93
PRO
111
E
VAL
112
n
94
VAL
112
E
LYS
113
n
95
LYS
113
E
LEU
114
n
96
LEU
114
E
ASN
115
n
97
ASN
115
E
ALA
116
n
98
ALA
116
E
ARG
117
n
99
ARG
117
E
VAL
118
n
100
VAL
118
E
ALA
119
n
101
ALA
119
E
THR
120
n
102
THR
120
E
VAL
121
n
103
VAL
121
E
ALA
122
n
104
ALA
122
E
LEU
123
n
105
LEU
123
E
PRO
124
n
106
PRO
124
E
SER
125
n
107
SER
125
E
SER
127
n
108
SER
127
E
CYS
128
n
109
CYS
128
E
ALA
129
n
110
ALA
129
E
PRO
130
n
111
PRO
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
LEU
145
n
125
LEU
145
E
SER
146
n
126
SER
146
E
SER
147
n
127
SER
147
E
GLY
148
n
128
GLY
148
E
VAL
149
n
129
VAL
149
E
ASN
150
n
130
ASN
150
E
GLU
151
n
131
GLU
151
E
PRO
152
n
132
PRO
152
E
ASP
153
n
133
ASP
153
E
LEU
154
n
134
LEU
154
E
LEU
155
n
135
LEU
155
E
GLN
156
n
136
GLN
156
E
CYS
157
n
137
CYS
157
E
LEU
158
n
138
LEU
158
E
ASP
159
n
139
ASP
159
E
ALA
160
n
140
ALA
160
E
PRO
161
n
141
PRO
161
E
LEU
162
n
142
LEU
162
E
LEU
163
n
143
LEU
163
E
PRO
164
n
144
PRO
164
E
GLN
165
n
145
GLN
165
E
ALA
166
n
146
ALA
166
E
ASP
167
n
147
ASP
167
E
CYS
168
n
148
CYS
168
E
GLU
169
n
149
GLU
169
E
ALA
170
n
150
ALA
170
E
SER
171
n
151
SER
171
E
TYR
172
n
152
TYR
172
E
PRO
173
n
153
PRO
173
E
GLY
174
n
154
GLY
174
E
LYS
175
n
155
LYS
175
E
ILE
176
n
156
ILE
176
E
THR
177
n
157
THR
177
E
ASP
178
n
158
ASP
178
E
ASN
179
n
159
ASN
179
E
MET
180
n
160
MET
180
E
VAL
181
n
161
VAL
181
E
CYS
182
n
162
CYS
182
E
VAL
183
n
163
VAL
183
E
GLY
184
n
164
GLY
184
E
PHE
184
n
165
A
PHE
184
E
LEU
185
n
166
LEU
185
E
GLU
186
n
167
GLU
186
E
GLY
187
n
168
GLY
187
E
GLY
188
n
169
GLY
188
E
LYS
188
n
170
A
LYS
188
E
GLY
189
n
171
GLY
189
E
SER
190
n
172
SER
190
E
CYS
191
n
173
CYS
191
E
GLN
192
n
174
GLN
192
E
GLY
193
n
175
GLY
193
E
ASP
194
n
176
ASP
194
E
SER
195
n
177
SER
195
E
GLY
196
n
178
GLY
196
E
GLY
197
n
179
GLY
197
E
PRO
198
n
180
PRO
198
E
VAL
199
n
181
VAL
199
E
VAL
200
n
182
VAL
200
E
CYS
201
n
183
CYS
201
E
ASN
202
n
184
ASN
202
E
GLY
203
n
185
GLY
203
E
GLU
204
n
186
GLU
204
E
LEU
209
n
187
LEU
209
E
GLN
210
n
188
GLN
210
E
GLY
211
n
189
GLY
211
E
ILE
212
n
190
ILE
212
E
VAL
213
n
191
VAL
213
E
SER
214
n
192
SER
214
E
TRP
215
n
193
TRP
215
E
GLY
216
n
194
GLY
216
E
TYR
217
n
195
TYR
217
E
GLY
219
n
196
GLY
219
E
CYS
220
n
197
CYS
220
E
ALA
221
n
198
ALA
221
E
LEU
221
n
199
A
LEU
221
E
PRO
222
n
200
PRO
222
E
ASP
223
n
201
ASP
223
E
ASN
224
n
202
ASN
224
E
PRO
225
n
203
PRO
225
E
ASP
226
n
204
ASP
226
E
VAL
227
n
205
VAL
227
E
TYR
228
n
206
TYR
228
E
THR
229
n
207
THR
229
E
LYS
230
n
208
LYS
230
E
VAL
231
n
209
VAL
231
E
CYS
232
n
210
CYS
232
E
ASN
233
n
211
ASN
233
E
TYR
234
n
212
TYR
234
E
VAL
235
n
213
VAL
235
E
ASP
236
n
214
ASP
236
E
TRP
237
n
215
TRP
237
E
ILE
238
n
216
ILE
238
E
GLN
239
n
217
GLN
239
E
ASP
240
n
218
ASP
240
E
THR
241
n
219
THR
241
E
ILE
242
n
220
ILE
242
E
ALA
243
n
221
ALA
243
E
ALA
244
n
222
ALA
244
E
ASN
245
n
223
ASN
245
E
VAL
1
n
1
VAL
1
I
ARG
2
n
2
ARG
2
I
GLU
3
n
3
GLU
3
I
VAL
4
n
4
VAL
4
I
CYS
5
n
5
CYS
5
I
SER
6
n
6
SER
6
I
GLU
7
n
7
GLU
7
I
GLN
8
n
8
GLN
8
I
ALA
9
n
9
ALA
9
I
GLU
10
n
10
GLU
10
I
THR
11
n
11
THR
11
I
GLY
12
n
12
GLY
12
I
PRO
13
n
13
PRO
13
I
CYS
14
n
14
CYS
14
I
ARG
15
n
15
ARG
15
I
ALA
16
n
16
ALA
16
I
MET
17
n
17
MET
17
I
ILE
18
n
18
ILE
18
I
SER
19
n
19
SER
19
I
ARG
20
n
20
ARG
20
I
TRP
21
n
21
TRP
21
I
TYR
22
n
22
TYR
22
I
PHE
23
n
23
PHE
23
I
ASP
24
n
24
ASP
24
I
VAL
25
n
25
VAL
25
I
THR
26
n
26
THR
26
I
GLU
27
n
27
GLU
27
I
GLY
28
n
28
GLY
28
I
LYS
29
n
29
LYS
29
I
CYS
30
n
30
CYS
30
I
ALA
31
n
31
ALA
31
I
PRO
32
n
32
PRO
32
I
PHE
33
n
33
PHE
33
I
PHE
34
n
34
PHE
34
I
TYR
35
n
35
TYR
35
I
GLY
36
n
36
GLY
36
I
GLY
37
n
37
GLY
37
I
CYS
38
n
38
CYS
38
I
GLY
39
n
39
GLY
39
I
GLY
40
n
40
GLY
40
I
ASN
41
n
41
ASN
41
I
ARG
42
n
42
ARG
42
I
ASN
43
n
43
ASN
43
I
ASN
44
n
44
ASN
44
I
PHE
45
n
45
PHE
45
I
ASP
46
n
46
ASP
46
I
THR
47
n
47
THR
47
I
GLU
48
n
48
GLU
48
I
GLU
49
n
49
GLU
49
I
TYR
50
n
50
TYR
50
I
CYS
51
n
51
CYS
51
I
MET
52
n
52
MET
52
I
ALA
53
n
53
ALA
53
I
VAL
54
n
54
VAL
54
I
CYS
55
n
55
CYS
55
I
GLY
56
n
56
GLY
56
I
author_and_software_defined_assembly
PISA
2
dimeric
1320
-9
11660
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
N
TYR
20
A
N
TYR
5
E
O
CYS
157
A
O
CYS
137
E
N
ALA
160
A
N
ALA
140
E
O
CYS
136
A
O
CYS
116
E
O
LEU
137
A
O
LEU
117
E
N
VAL
200
A
N
VAL
182
E
O
GLY
197
A
O
GLY
179
E
N
VAL
213
A
N
VAL
191
E
O
TRP
215
A
O
TRP
193
E
N
VAL
227
A
N
VAL
205
E
O
ASP
226
A
O
ASP
204
E
N
VAL
183
A
N
VAL
163
E
O
SER
45
A
O
SER
28
E
N
VAL
53
A
N
VAL
36
E
N
SER
54
A
N
SER
37
E
O
MET
104
A
O
MET
86
E
O
ILE
103
A
O
ILE
85
E
N
HIS
91
A
N
HIS
73
E
O
VAL
66
A
O
VAL
48
E
N
GLN
81
A
N
GLN
63
I
O
TYR
35
B
O
TYR
35
I
N
ILE
18
B
N
ILE
18
I
O
TRP
21
B
O
TRP
21
I
N
PHE
45
B
N
PHE
45
1
E
CG
ARG
96
A
CG
ARG
78
1
Y
1
E
CD
ARG
96
A
CD
ARG
78
1
Y
1
E
NE
ARG
96
A
NE
ARG
78
1
Y
1
E
CZ
ARG
96
A
CZ
ARG
78
1
Y
1
E
NH1
ARG
96
A
NH1
ARG
78
1
Y
1
E
NH2
ARG
96
A
NH2
ARG
78
1
Y
1
E
CG
LYS
97
A
CG
LYS
79
1
Y
1
E
CD
LYS
97
A
CD
LYS
79
1
Y
1
E
CE
LYS
97
A
CE
LYS
79
1
Y
1
E
NZ
LYS
97
A
NZ
LYS
79
1
Y
1
E
CG
GLU
151
A
CG
GLU
131
1
Y
1
E
CD
GLU
151
A
CD
GLU
131
1
Y
1
E
OE1
GLU
151
A
OE1
GLU
131
1
Y
1
E
OE2
GLU
151
A
OE2
GLU
131
1
Y
1
E
CG
GLN
165
A
CG
GLN
145
1
Y
1
E
CD
GLN
165
A
CD
GLN
145
1
Y
1
E
OE1
GLN
165
A
OE1
GLN
145
1
Y
1
E
NE2
GLN
165
A
NE2
GLN
145
1
Y
1
E
CG
GLN
239
A
CG
GLN
217
1
Y
1
E
CD
GLN
239
A
CD
GLN
217
1
Y
1
E
OE1
GLN
239
A
OE1
GLN
217
1
Y
1
E
NE2
GLN
239
A
NE2
GLN
217
1
Y
1
I
CG
GLN
8
B
CG
GLN
8
1
Y
1
I
CD
GLN
8
B
CD
GLN
8
1
Y
1
I
OE1
GLN
8
B
OE1
GLN
8
1
Y
1
I
NE2
GLN
8
B
NE2
GLN
8
1
Y
1
I
CG
GLU
10
B
CG
GLU
10
1
Y
1
I
CD
GLU
10
B
CD
GLU
10
1
Y
1
I
OE1
GLU
10
B
OE1
GLU
10
1
Y
1
I
OE2
GLU
10
B
OE2
GLU
10
1
Y
1
I
CG
GLU
27
B
CG
GLU
27
1
Y
1
I
CD
GLU
27
B
CD
GLU
27
1
Y
1
I
OE1
GLU
27
B
OE1
GLU
27
1
Y
1
I
OE2
GLU
27
B
OE2
GLU
27
1
Y
1
I
CG
ARG
42
B
CG
ARG
42
1
Y
1
I
CD
ARG
42
B
CD
ARG
42
1
Y
1
I
NE
ARG
42
B
NE
ARG
42
1
Y
1
I
CZ
ARG
42
B
CZ
ARG
42
1
Y
1
I
NH1
ARG
42
B
NH1
ARG
42
1
Y
1
I
NH2
ARG
42
B
NH2
ARG
42
1
Y
1
I
CG
GLU
49
B
CG
GLU
49
1
Y
1
I
CD
GLU
49
B
CD
GLU
49
1
Y
1
I
OE1
GLU
49
B
OE1
GLU
49
1
Y
1
I
OE2
GLU
49
B
OE2
GLU
49
1
Y
1
6.34
0.80
106.30
112.64
E
E
E
CD1
CG
CD2
TRP
TRP
TRP
51
51
51
N
1
-7.89
1.30
127.00
119.11
E
E
E
CB
CG
CD1
TRP
TRP
TRP
51
51
51
N
1
-6.13
0.80
107.30
101.17
E
E
E
CE2
CD2
CG
TRP
TRP
TRP
51
51
51
N
1
6.17
0.90
133.90
140.07
E
E
E
CG
CD2
CE3
TRP
TRP
TRP
51
51
51
N
1
-10.62
1.60
110.90
100.28
E
E
E
CG1
CB
CG2
VAL
VAL
VAL
183
183
183
N
1
6.88
0.80
106.30
113.18
E
E
E
CD1
CG
CD2
TRP
TRP
TRP
215
215
215
N
1
-6.29
1.00
110.10
103.81
E
E
E
CG
CD1
NE1
TRP
TRP
TRP
215
215
215
N
1
-5.79
0.80
107.30
101.51
E
E
E
CE2
CD2
CG
TRP
TRP
TRP
215
215
215
N
1
5.98
0.80
106.30
112.28
E
E
E
CD1
CG
CD2
TRP
TRP
TRP
237
237
237
N
1
-5.39
0.80
107.30
101.91
E
E
E
CE2
CD2
CG
TRP
TRP
TRP
237
237
237
N
1
6.80
0.80
106.30
113.10
I
I
I
CD1
CG
CD2
TRP
TRP
TRP
21
21
21
N
1
-6.05
0.80
107.30
101.25
I
I
I
CE2
CD2
CG
TRP
TRP
TRP
21
21
21
N
1
7.12
1.10
114.20
121.32
I
I
I
CA
CB
SG
CYS
CYS
CYS
38
38
38
N
1
E
E
NE2
CD2
HIS
HIS
91
91
-0.068
0.011
1.373
1.305
N
1
E
VAL
27
-111.51
69.41
1
E
ASP
49
-32.04
-29.90
1
E
HIS
71
-125.51
-56.80
1
E
ASN
115
-170.15
-166.73
1
E
SER
214
-127.56
-71.15
1
I
ARG
2
41.95
-65.05
0.168
0.168
2.5
1
2.5
141
2195
0
0
2054
0.011
2.8
model building
X-PLOR
refinement
X-PLOR
phasing
X-PLOR
TRYPSIN (E.C.3.4.21.4) VARIANT (D189G,G226D) COMPLEXED WITH AMYLOID BETA-PROTEIN PRECURSOR INHIBITOR DOMAIN (APPI)
RELOCATING A NEGATIVE CHARGE IN THE BINDING POCKET OF TRYPSIN
1
N
N
2
N
N
3
N
N
3
N
N
E
PRO
164
A
PRO
144
HELX_P
IRREGULAR AFTER CYS 168
E
TYR
172
A
TYR
152
1
SHA
9
E
LYS
230
A
LYS
208
HELX_P
LEADS INTO TERMINAL ALPHA-HLX
E
VAL
235
A
VAL
213
5
31A
6
E
TYR
234
A
TYR
212
HELX_P
C-TERMINAL HELIX
E
ASN
245
A
ASN
223
1
TEA
12
I
THR
47
B
THR
47
HELX_P
I
GLY
56
B
GLY
56
1
H2
10
disulf
2.019
E
CYS
22
A
SG
CYS
7
1_555
E
CYS
157
A
SG
CYS
137
1_555
disulf
2.024
E
CYS
42
A
SG
CYS
25
1_555
E
CYS
58
A
SG
CYS
41
1_555
disulf
2.020
E
CYS
128
A
SG
CYS
109
1_555
E
CYS
232
A
SG
CYS
210
1_555
disulf
2.009
E
CYS
136
A
SG
CYS
116
1_555
E
CYS
201
A
SG
CYS
183
1_555
disulf
2.004
E
CYS
168
A
SG
CYS
148
1_555
E
CYS
182
A
SG
CYS
162
1_555
disulf
2.022
E
CYS
191
A
SG
CYS
173
1_555
E
CYS
220
A
SG
CYS
197
1_555
disulf
2.022
I
CYS
5
B
SG
CYS
5
1_555
I
CYS
55
B
SG
CYS
55
1_555
disulf
2.016
I
CYS
14
B
SG
CYS
14
1_555
I
CYS
38
B
SG
CYS
38
1_555
disulf
2.008
I
CYS
30
B
SG
CYS
30
1_555
I
CYS
51
B
SG
CYS
51
1_555
HYDROLASE/HYDROLASE INHIBITOR
PROTEINASE, HYDROLASE-HYDROLASE INHIBITOR COMPLEX
TRY2_RAT
UNP
1
1
P00763
MRALLFLALVGAAVAFPVDDDDKIVGGYTCQENSVPYQVSLNSGYHFCGGSLINDQWVVSAAHCYKSRIQVRLGEHNINV
LEGNEQFVNAAKIIKHPNFDRKTLNNDIMLIKLSSPVKLNARVATVALPSSCAPAGTQCLISGWGNTLSSGVNEPDLLQC
LDAPLLPQADCEASYPGKITDNMVCVGFLEGGKDSCQGDSGGPVVCNGELQGIVSWGYGCALPDNPGVYTKVCNYVDWIQ
DTIAAN
A4_HUMAN
UNP
2
1
P05067
MLPSLALLLLAAWTVRALEVPTDGNAGLLAEPQIAMFCGKLNMHMNVQNGKWESDPSGTKTCIGTKEGILQYCQEVYPEL
QITNVVEANQPVTIQNWCKRGRKQCKTHTHIVIPYRCLVGEFVSDALLVPDKCKFLHQERMDVCETHLHWHTVAKETCSE
KSTNLHDYGMLLPCGIDKFRGVEFVCCPLAEESDSIDSADAEEDDSDVWWGGADTDYADGGEDKVVEVAEEEEVADVEEE
EAEDDEDVEDGDEVEEEAEEPYEEATERTTSIATTTTTTTESVEEVVREVCSEQAETGPCRAMISRWYFDVTEGKCAPFF
YGGCGGNRNNFDTEEYCMAVCGSVSSQSLLKTTSEPLPQDPVKLPTTAASTPDAVDKYLETPGDENEHAHFQKAKERLEA
KHRERMSQVMREWEEAERQAKNLPKADKKAVIQHFQEKVESLEQEAANERQQLVETHMARVEAMLNDRRRLALENYITAL
QAVPPRPHHVFNMLKKYVRAEQKDRQHTLKHFEHVRMVDPKKAAQIRSQVMTHLRVIYERMNQSLSLLYNVPAVAEEIQD
EVDELLQKEQNYSDDVLANMISEPRISYGNDALMPSLTETKTTVELLPVNGEFSLDDLQPWHPFGVDSVPANTENEVEPV
DARPAADRGLTTRPGSGLTNIKTEEISEVKMDAEFGHDSGFEVRHQKLVFFAEDVGSNKGAIIGLMVGGVVIATVIVITL
VMLKKKQYTSIHHGVVEVDAAVTPEERHLSKMQQNGYENPTYKFFEQMQN
24
246
1BRC
16
245
P00763
E
1
1
223
287
342
1BRC
1
56
P05067
I
2
1
56
1
ASP
CONFLICT
GLY
189
1BRC
E
P00763
UNP
194
171
1
GLY
CONFLICT
ASP
226
1BRC
E
P00763
UNP
227
204
7
4
2
3
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
TYR
20
A
TYR
5
E
TYR
20
A
TYR
5
E
GLN
156
A
GLN
136
E
PRO
161
A
PRO
141
E
CYS
136
A
CYS
116
E
GLY
140
A
GLY
120
E
GLY
197
A
GLY
179
E
CYS
201
A
CYS
183
E
GLU
204
A
GLU
186
E
TRP
215
A
TRP
193
E
ASP
226
A
ASP
204
E
VAL
231
A
VAL
209
E
ASN
179
A
ASN
159
E
VAL
183
A
VAL
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
VAL
66
A
VAL
48
E
GLN
81
A
GLN
63
E
ALA
85
A
ALA
67
I
LYS
29
B
LYS
29
I
TYR
35
B
TYR
35
I
ILE
18
B
ILE
18
I
ASP
24
B
ASP
24
I
PHE
45
B
PHE
45
I
PHE
45
B
PHE
45
CATALYTIC TRIAD RESIDUES, CONSERVED IN ALL SERINE PROTEASES OF THE TRYPSIN AND SUBTILISIN STRUCTURAL CLASSES
Author
3
E
HIS
57
A
HIS
40
3
1_555
E
ASP
102
A
ASP
84
3
1_555
E
SER
195
A
SER
177
3
1_555
154
P 32 2 1