0.032835
0.000000
0.006399
0.000000
0.013752
0.000000
0.000000
0.000000
0.032720
0.00000
0.00000
0.00000
Ng, K.K.
Petersen, J.F.
Cherney, M.M.
Garen, C.
James, M.N.
http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic
2
90.00
101.03
90.00
30.455
72.717
31.137
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
US
Nat.Struct.Biol.
NSBIEW
2024
1072-8368
7
653
657
10.1038/77950
10932249
Structural basis for the inhibition of porcine pepsin by Ascaris pepsin inhibitor-3.
2000
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
IMAGE PLATE
1997-10-03
MAC Science DIP-2030B
SINGLE WAVELENGTH
M
x-ray
1
1.5418
1.0
1.5418
ROTATING ANODE
RIGAKU RU200
16411.689
MAJOR PEPSIN INHIBITOR PI-3
1
man
polymer
18.015
water
136
nat
water
no
no
QFLFSMSTGPFICTVKDNQVFVANLPWTMLEGDDIQVGKEFAARVEDCTNVKHDMAPTCTKPPPFCGPQDMKMFNFVGCS
VLGNKLFIDQKYVRDLTAKDHAEVQTFREKIAAFEEQQENQPPSSGMPHGAVPAGGLSPPPPPSFCTVQ
QFLFSMSTGPFICTVKDNQVFVANLPWTMLEGDDIQVGKEFAARVEDCTNVKHDMAPTCTKPPPFCGPQDMKMFNFVGCS
VLGNKLFIDQKYVRDLTAKDHAEVQTFREKIAAFEEQQENQPPSSGMPHGAVPAGGLSPPPPPSFCTVQ
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
pig roundworm
Ascaris
Escherichia
sample
6253
Ascaris suum
562
Escherichia coli
PET-3D
1
2.06
40.29
VAPOR DIFFUSION, HANGING DROP
7.0
PEG 4000, potassium fluoride, spermidine-HCl, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K
298
diffrn_source
repository
Initial release
Version format compliance
Version format compliance
Data collection
1
0
2001-02-01
1
1
2008-04-27
1
2
2011-07-13
1
3
2018-04-04
_diffrn_source.type
scaris pepsin inhibitor-3 bound to porcine pepsin
RCSB
Y
RCSB
2000-05-31
REL
REL
HOH
water
HOH
1
2
HOH
HOH
149
A
HOH
2
2
HOH
HOH
150
A
HOH
3
2
HOH
HOH
151
A
HOH
4
2
HOH
HOH
152
A
HOH
5
2
HOH
HOH
153
A
HOH
6
2
HOH
HOH
154
A
HOH
7
2
HOH
HOH
155
A
HOH
8
2
HOH
HOH
156
A
HOH
9
2
HOH
HOH
157
A
HOH
10
2
HOH
HOH
158
A
HOH
11
2
HOH
HOH
159
A
HOH
12
2
HOH
HOH
160
A
HOH
13
2
HOH
HOH
161
A
HOH
14
2
HOH
HOH
162
A
HOH
15
2
HOH
HOH
163
A
HOH
16
2
HOH
HOH
164
A
HOH
17
2
HOH
HOH
165
A
HOH
18
2
HOH
HOH
166
A
HOH
19
2
HOH
HOH
167
A
HOH
20
2
HOH
HOH
168
A
HOH
21
2
HOH
HOH
169
A
HOH
22
2
HOH
HOH
170
A
HOH
23
2
HOH
HOH
171
A
HOH
24
2
HOH
HOH
172
A
HOH
25
2
HOH
HOH
173
A
HOH
26
2
HOH
HOH
174
A
HOH
27
2
HOH
HOH
175
A
HOH
28
2
HOH
HOH
176
A
HOH
29
2
HOH
HOH
177
A
HOH
30
2
HOH
HOH
178
A
HOH
31
2
HOH
HOH
179
A
HOH
32
2
HOH
HOH
180
A
HOH
33
2
HOH
HOH
181
A
HOH
34
2
HOH
HOH
182
A
HOH
35
2
HOH
HOH
183
A
HOH
36
2
HOH
HOH
184
A
HOH
37
2
HOH
HOH
185
A
HOH
38
2
HOH
HOH
186
A
HOH
39
2
HOH
HOH
187
A
HOH
40
2
HOH
HOH
188
A
HOH
41
2
HOH
HOH
189
A
HOH
42
2
HOH
HOH
190
A
HOH
43
2
HOH
HOH
191
A
HOH
44
2
HOH
HOH
192
A
HOH
45
2
HOH
HOH
193
A
HOH
46
2
HOH
HOH
194
A
HOH
47
2
HOH
HOH
195
A
HOH
48
2
HOH
HOH
196
A
HOH
49
2
HOH
HOH
197
A
HOH
50
2
HOH
HOH
198
A
HOH
51
2
HOH
HOH
199
A
HOH
52
2
HOH
HOH
200
A
HOH
53
2
HOH
HOH
201
A
HOH
54
2
HOH
HOH
202
A
HOH
55
2
HOH
HOH
203
A
HOH
56
2
HOH
HOH
204
A
HOH
57
2
HOH
HOH
205
A
HOH
58
2
HOH
HOH
206
A
HOH
59
2
HOH
HOH
207
A
HOH
60
2
HOH
HOH
208
A
HOH
61
2
HOH
HOH
209
A
HOH
62
2
HOH
HOH
210
A
HOH
63
2
HOH
HOH
211
A
HOH
64
2
HOH
HOH
212
A
HOH
65
2
HOH
HOH
213
A
HOH
66
2
HOH
HOH
214
A
HOH
67
2
HOH
HOH
215
A
HOH
68
2
HOH
HOH
216
A
HOH
69
2
HOH
HOH
217
A
HOH
70
2
HOH
HOH
218
A
HOH
71
2
HOH
HOH
219
A
HOH
72
2
HOH
HOH
220
A
HOH
73
2
HOH
HOH
221
A
HOH
74
2
HOH
HOH
222
A
HOH
75
2
HOH
HOH
223
A
HOH
76
2
HOH
HOH
224
A
HOH
77
2
HOH
HOH
225
A
HOH
78
2
HOH
HOH
226
A
HOH
79
2
HOH
HOH
227
A
HOH
80
2
HOH
HOH
228
A
HOH
81
2
HOH
HOH
229
A
HOH
82
2
HOH
HOH
230
A
HOH
83
2
HOH
HOH
231
A
HOH
84
2
HOH
HOH
232
A
HOH
85
2
HOH
HOH
233
A
HOH
86
2
HOH
HOH
234
A
HOH
87
2
HOH
HOH
235
A
HOH
88
2
HOH
HOH
236
A
HOH
89
2
HOH
HOH
237
A
HOH
90
2
HOH
HOH
238
A
HOH
91
2
HOH
HOH
239
A
HOH
92
2
HOH
HOH
240
A
HOH
93
2
HOH
HOH
241
A
HOH
94
2
HOH
HOH
242
A
HOH
95
2
HOH
HOH
243
A
HOH
96
2
HOH
HOH
244
A
HOH
97
2
HOH
HOH
245
A
HOH
98
2
HOH
HOH
246
A
HOH
99
2
HOH
HOH
247
A
HOH
100
2
HOH
HOH
248
A
HOH
101
2
HOH
HOH
249
A
HOH
102
2
HOH
HOH
250
A
HOH
103
2
HOH
HOH
251
A
HOH
104
2
HOH
HOH
252
A
HOH
105
2
HOH
HOH
253
A
HOH
106
2
HOH
HOH
254
A
HOH
107
2
HOH
HOH
255
A
HOH
108
2
HOH
HOH
256
A
HOH
109
2
HOH
HOH
257
A
HOH
110
2
HOH
HOH
258
A
HOH
111
2
HOH
HOH
259
A
HOH
112
2
HOH
HOH
260
A
HOH
113
2
HOH
HOH
261
A
HOH
114
2
HOH
HOH
262
A
HOH
115
2
HOH
HOH
263
A
HOH
116
2
HOH
HOH
264
A
HOH
117
2
HOH
HOH
265
A
HOH
118
2
HOH
HOH
266
A
HOH
119
2
HOH
HOH
267
A
HOH
120
2
HOH
HOH
268
A
HOH
121
2
HOH
HOH
269
A
HOH
122
2
HOH
HOH
270
A
HOH
123
2
HOH
HOH
271
A
HOH
124
2
HOH
HOH
272
A
HOH
125
2
HOH
HOH
273
A
HOH
126
2
HOH
HOH
274
A
HOH
127
2
HOH
HOH
275
A
HOH
128
2
HOH
HOH
276
A
HOH
129
2
HOH
HOH
277
A
HOH
130
2
HOH
HOH
278
A
HOH
131
2
HOH
HOH
279
A
HOH
132
2
HOH
HOH
280
A
HOH
133
2
HOH
HOH
281
A
HOH
134
2
HOH
HOH
282
A
HOH
135
2
HOH
HOH
283
A
HOH
136
2
HOH
HOH
284
A
n
1
1
A
PHE
2
n
2
PHE
2
A
LEU
3
n
3
LEU
3
A
PHE
4
n
4
PHE
4
A
SER
5
n
5
SER
5
A
MET
6
n
6
MET
6
A
SER
7
n
7
SER
7
A
THR
8
n
8
THR
8
A
GLY
9
n
9
GLY
9
A
PRO
10
n
10
PRO
10
A
PHE
11
n
11
PHE
11
A
ILE
12
n
12
ILE
12
A
CYS
13
n
13
CYS
13
A
THR
14
n
14
THR
14
A
VAL
15
n
15
VAL
15
A
LYS
16
n
16
LYS
16
A
ASP
17
n
17
ASP
17
A
ASN
18
n
18
ASN
18
A
GLN
19
n
19
GLN
19
A
VAL
20
n
20
VAL
20
A
PHE
21
n
21
PHE
21
A
VAL
22
n
22
VAL
22
A
ALA
23
n
23
ALA
23
A
ASN
24
n
24
ASN
24
A
LEU
25
n
25
LEU
25
A
PRO
26
n
26
PRO
26
A
TRP
27
n
27
TRP
27
A
THR
28
n
28
THR
28
A
MET
29
n
29
MET
29
A
LEU
30
n
30
LEU
30
A
GLU
31
n
31
GLU
31
A
GLY
32
n
32
GLY
32
A
ASP
33
n
33
ASP
33
A
ASP
34
n
34
ASP
34
A
ILE
35
n
35
ILE
35
A
GLN
36
n
36
GLN
36
A
VAL
37
n
37
VAL
37
A
GLY
38
n
38
GLY
38
A
LYS
39
n
39
LYS
39
A
GLU
40
n
40
GLU
40
A
PHE
41
n
41
PHE
41
A
ALA
42
n
42
ALA
42
A
ALA
43
n
43
ALA
43
A
ARG
44
n
44
ARG
44
A
VAL
45
n
45
VAL
45
A
GLU
46
n
46
GLU
46
A
ASP
47
n
47
ASP
47
A
CYS
48
n
48
CYS
48
A
THR
49
n
49
THR
49
A
ASN
50
n
50
ASN
50
A
VAL
51
n
51
VAL
51
A
LYS
52
n
52
LYS
52
A
HIS
53
n
53
HIS
53
A
ASP
54
n
54
ASP
54
A
MET
55
n
55
MET
55
A
ALA
56
n
56
ALA
56
A
PRO
57
n
57
PRO
57
A
THR
58
n
58
THR
58
A
CYS
59
n
59
CYS
59
A
THR
60
n
60
THR
60
A
LYS
61
n
61
LYS
61
A
PRO
62
n
62
PRO
62
A
PRO
63
n
63
PRO
63
A
PRO
64
n
64
PRO
64
A
PHE
65
n
65
PHE
65
A
CYS
66
n
66
CYS
66
A
GLY
67
n
67
GLY
67
A
PRO
68
n
68
PRO
68
A
GLN
69
n
69
GLN
69
A
ASP
70
n
70
ASP
70
A
MET
71
n
71
MET
71
A
LYS
72
n
72
LYS
72
A
MET
73
n
73
MET
73
A
PHE
74
n
74
PHE
74
A
ASN
75
n
75
ASN
75
A
PHE
76
n
76
PHE
76
A
VAL
77
n
77
VAL
77
A
GLY
78
n
78
GLY
78
A
CYS
79
n
79
CYS
79
A
SER
80
n
80
SER
80
A
VAL
81
n
81
VAL
81
A
LEU
82
n
82
LEU
82
A
GLY
83
n
83
GLY
83
A
ASN
84
n
84
ASN
84
A
LYS
85
n
85
LYS
85
A
LEU
86
n
86
LEU
86
A
PHE
87
n
87
PHE
87
A
ILE
88
n
88
ILE
88
A
ASP
89
n
89
ASP
89
A
GLN
90
n
90
GLN
90
A
LYS
91
n
91
LYS
91
A
TYR
92
n
92
TYR
92
A
VAL
93
n
93
VAL
93
A
ARG
94
n
94
ARG
94
A
ASP
95
n
95
ASP
95
A
LEU
96
n
96
LEU
96
A
THR
97
n
97
THR
97
A
ALA
98
n
98
ALA
98
A
LYS
99
n
99
LYS
99
A
ASP
100
n
100
ASP
100
A
HIS
101
n
101
HIS
101
A
ALA
102
n
102
ALA
102
A
GLU
103
n
103
GLU
103
A
VAL
104
n
104
VAL
104
A
GLN
105
n
105
GLN
105
A
THR
106
n
106
THR
106
A
PHE
107
n
107
PHE
107
A
ARG
108
n
108
ARG
108
A
GLU
109
n
109
GLU
109
A
LYS
110
n
110
LYS
110
A
ILE
111
n
111
ILE
111
A
ALA
112
n
112
ALA
112
A
ALA
113
n
113
ALA
113
A
PHE
114
n
114
PHE
114
A
GLU
115
n
115
GLU
115
A
GLU
116
n
116
GLU
116
A
GLN
117
n
117
GLN
117
A
n
118
118
A
n
119
119
A
n
120
120
A
n
121
121
A
n
122
122
A
n
123
123
A
n
124
124
A
n
125
125
A
n
126
126
A
n
127
127
A
n
128
128
A
n
129
129
A
n
130
130
A
n
131
131
A
n
132
132
A
n
133
133
A
n
134
134
A
n
135
135
A
n
136
136
A
n
137
137
A
SER
138
n
138
SER
138
A
PRO
139
n
139
PRO
139
A
PRO
140
n
140
PRO
140
A
PRO
141
n
141
PRO
141
A
PRO
142
n
142
PRO
142
A
PRO
143
n
143
PRO
143
A
SER
144
n
144
SER
144
A
PHE
145
n
145
PHE
145
A
CYS
146
n
146
CYS
146
A
THR
147
n
147
THR
147
A
VAL
148
n
148
VAL
148
A
n
149
149
A
author_defined_assembly
1
monomeric
1.0000000000
0.0000000000
0.0000000000
0.0000000000
1.0000000000
0.0000000000
0.0000000000
0.0000000000
1.0000000000
1_555
x,y,z
identity operation
0.0000000000
0.0000000000
0.0000000000
A
O
SER
7
A
O
SER
7
A
N
MET
73
A
N
MET
73
A
N
PHE
76
A
N
PHE
76
A
O
CYS
79
A
O
CYS
79
A
N
LEU
82
A
N
LEU
82
A
O
LYS
85
A
O
LYS
85
A
N
ILE
88
A
N
ILE
88
A
O
LYS
91
A
O
LYS
91
A
N
LYS
16
A
N
LYS
16
A
O
GLN
19
A
O
GLN
19
A
N
VAL
22
A
N
VAL
22
A
O
LEU
25
A
O
LEU
25
1
A
GLN
1
A
GLN
1
1
Y
1
A
GLN
118
A
GLN
118
1
Y
1
A
GLU
119
A
GLU
119
1
Y
1
A
ASN
120
A
ASN
120
1
Y
1
A
GLN
121
A
GLN
121
1
Y
1
A
PRO
122
A
PRO
122
1
Y
1
A
PRO
123
A
PRO
123
1
Y
1
A
SER
124
A
SER
124
1
Y
1
A
SER
125
A
SER
125
1
Y
1
A
GLY
126
A
GLY
126
1
Y
1
A
MET
127
A
MET
127
1
Y
1
A
PRO
128
A
PRO
128
1
Y
1
A
HIS
129
A
HIS
129
1
Y
1
A
GLY
130
A
GLY
130
1
Y
1
A
ALA
131
A
ALA
131
1
Y
1
A
VAL
132
A
VAL
132
1
Y
1
A
PRO
133
A
PRO
133
1
Y
1
A
ALA
134
A
ALA
134
1
Y
1
A
GLY
135
A
GLY
135
1
Y
1
A
GLY
136
A
GLY
136
1
Y
1
A
LEU
137
A
LEU
137
1
Y
1
A
GLN
149
A
GLN
149
1
Y
1
A
ASN
18
75.37
-9.75
PROTEIN_REP.PARAM
PROTEIN_PI3.TOP
WATER_REP.PARAM
WATER.TOP
24.9
5.76
0.00
0.99
-2.71
0.00
-3.05
0.255
0.007
0.211
1.75
19.58
1362
13394
13394
10.2
99.5
RANDOM
578945.70
0.00
1
RESTRAINED
THROUGHOUT
0.0
Engh & Huber
FLAT MODEL
64.74
0.431
0.26
0.21
5.00
0.23
0.21
1.75
19.58
136
1131
0
0
995
0.010
1.4
23.9
1.02
1.49
1.50
2.21
2.00
2.38
2.00
3.38
2.50
0.327
0.023
0.291
1.86
200
1985
6
9.2
98.1
22.3
1.75
20.0
1F32
13394
13394
0.0
0.0
0.058
1
20.7
3.0
99.6
0.263
1.75
1.78
644
2.5
97.6
data reduction
DENZO
data scaling
SCALEPACK
phasing
SOLVE
refinement
CNS
1.0
MAJOR PEPSIN INHIBITOR PI-3
CRYSTAL STRUCTURE OF ASCARIS PEPSIN INHIBITOR-3
1
N
N
2
N
N
A
GLU
31
A
GLU
31
HELX_P
A
ASP
33
A
ASP
33
5
1
3
A
ASP
34
A
ASP
34
HELX_P
A
VAL
51
A
VAL
51
1
2
18
A
ALA
56
A
ALA
56
HELX_P
A
LYS
61
A
LYS
61
1
3
6
A
PRO
63
A
PRO
63
HELX_P
A
GLY
67
A
GLY
67
5
4
5
A
THR
97
A
THR
97
HELX_P
A
GLN
117
A
GLN
117
1
5
21
A
PRO
143
A
PRO
143
HELX_P
A
THR
147
A
THR
147
5
6
5
disulf
2.030
A
CYS
13
A
SG
CYS
13
1_555
A
CYS
66
A
SG
CYS
66
1_555
disulf
2.031
A
CYS
48
A
SG
CYS
48
1_555
A
CYS
59
A
SG
CYS
59
1_555
disulf
2.030
A
CYS
79
A
SG
CYS
79
1_555
A
CYS
146
A
SG
CYS
146
1_555
HYDROLASE INHIBITOR
proteinase inhibitor, HYDROLASE INHIBITOR
A
GLY
9
A
GLY
9
1
A
PRO
10
A
PRO
10
0.07
API3_ASCSU
UNP
1
21
P19400
QFLFSMSTGPFICTVKDNQVFVANLPWTMLEGDDIQVGKEFAARVEDCTNVKHDMAPTCTKPPPFCGPQDMKMFNFVGCS
VLGNKLFIDQKYVRDLTAKDHAEVQTFREKIAAFEEQQENQPPSSGMPHGAVPAGGLSPPPPPSFCTVQ
21
169
1F32
1
149
P19400
A
1
1
149
5
3
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
A
SER
5
A
SER
5
A
THR
8
A
THR
8
A
LYS
72
A
LYS
72
A
PHE
76
A
PHE
76
A
CYS
79
A
CYS
79
A
LEU
82
A
LEU
82
A
LYS
85
A
LYS
85
A
ILE
88
A
ILE
88
A
LYS
91
A
LYS
91
A
ASP
95
A
ASP
95
A
CYS
13
A
CYS
13
A
LYS
16
A
LYS
16
A
GLN
19
A
GLN
19
A
VAL
22
A
VAL
22
A
LEU
25
A
LEU
25
A
MET
29
A
MET
29
4
P 1 21 1