0.023392
-0.000001
0.006123
0.000000
0.023993
-0.000001
0.000000
0.000000
0.014169
0.00000
0.00000
0.00000
Fisher, Z.
Hernandez Prada, J.A.
Tu, C.
Duda, D.
Yoshioka, C.
An, H.
Govindasamy, L.
Silverman, D.N.
McKenna, R.
http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic
2
90.00
104.67
90.00
42.750
41.678
72.956
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
Cl -1
35.453
CHLORIDE ION
non-polymer
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
Zn 2
65.409
ZINC ION
non-polymer
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
CL
N
75
N
N
N
76
R
C
N
77
N
C
N
78
N
O
N
79
N
C
N
80
N
S
N
81
N
O
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
H
N
89
N
N
N
90
S
C
N
91
N
C
N
92
N
O
N
93
N
C
N
94
N
C
N
95
N
C
N
96
N
O
N
97
N
N
N
98
N
O
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
H
N
109
N
N
N
110
S
C
N
111
N
C
N
112
N
O
N
113
N
C
N
114
N
C
N
115
N
C
N
116
N
O
N
117
N
O
N
118
N
O
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
N
C
N
130
N
C
N
131
N
O
N
132
N
O
N
133
N
H
N
134
N
H
N
135
N
H
N
136
N
H
N
137
N
H
N
138
N
N
N
139
S
C
N
140
N
C
N
141
N
O
N
142
N
C
Y
143
N
C
Y
144
N
N
Y
145
N
C
Y
146
N
C
Y
147
N
N
N
148
N
O
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
H
N
159
N
O
N
160
N
H
N
161
N
H
N
162
N
N
N
163
S
C
N
164
N
C
N
165
N
O
N
166
S
C
N
167
N
C
N
168
N
C
N
169
N
C
N
170
N
O
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
H
N
181
N
H
N
182
N
H
N
183
N
H
N
184
N
N
N
185
S
C
N
186
N
C
N
187
N
O
N
188
N
C
N
189
N
C
N
190
N
C
N
191
N
C
N
192
N
O
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
H
N
203
N
H
N
204
N
H
N
205
N
H
N
206
N
N
N
207
S
C
N
208
N
C
N
209
N
O
N
210
N
C
N
211
N
C
N
212
N
C
N
213
N
C
N
214
N
N
N
215
N
O
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
H
N
228
N
H
N
229
N
H
N
230
N
H
N
231
N
N
N
232
S
C
N
233
N
C
N
234
N
O
N
235
N
C
N
236
N
C
N
237
N
S
N
238
N
C
N
239
N
O
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
H
N
248
N
H
N
249
N
H
N
250
N
H
N
251
N
N
N
252
S
C
N
253
N
C
N
254
N
O
N
255
N
C
Y
256
N
C
Y
257
N
C
Y
258
N
C
Y
259
N
C
Y
260
N
C
Y
261
N
C
N
262
N
O
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
H
N
271
N
H
N
272
N
H
N
273
N
H
N
274
N
N
N
275
S
C
N
276
N
C
N
277
N
O
N
278
N
C
N
279
N
C
N
280
N
C
N
281
N
O
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
H
N
291
N
N
N
292
S
C
N
293
N
C
N
294
N
O
N
295
N
C
N
296
N
O
N
297
N
O
N
298
N
H
N
299
N
H
N
300
N
H
N
301
N
H
N
302
N
H
N
303
N
H
N
304
N
H
N
305
N
N
N
306
S
C
N
307
N
C
N
308
N
O
N
309
R
C
N
310
N
O
N
311
N
C
N
312
N
O
N
313
N
H
N
314
N
H
N
315
N
H
N
316
N
H
N
317
N
H
N
318
N
H
N
319
N
H
N
320
N
H
N
321
N
H
N
322
N
N
N
323
S
C
N
324
N
C
N
325
N
O
N
326
N
C
Y
327
N
C
Y
328
N
C
Y
329
N
C
Y
330
N
N
Y
331
N
C
Y
332
N
C
Y
333
N
C
Y
334
N
C
Y
335
N
C
N
336
N
O
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
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
N
C
Y
354
N
C
Y
355
N
C
Y
356
N
C
Y
357
N
C
Y
358
N
C
Y
359
N
C
N
360
N
O
N
361
N
O
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
H
N
370
N
H
N
371
N
H
N
372
N
H
N
373
N
N
N
374
S
C
N
375
N
C
N
376
N
O
N
377
N
C
N
378
N
C
N
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
ZN
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
sing
N
157
N
sing
N
158
N
doub
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
sing
N
178
N
sing
N
179
N
doub
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
sing
N
199
N
sing
N
200
N
doub
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
sing
N
223
N
sing
N
224
N
doub
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
sing
N
242
N
sing
N
243
N
doub
N
244
N
sing
N
245
N
sing
N
246
N
sing
N
247
N
sing
Y
248
N
doub
Y
249
N
sing
Y
250
N
sing
N
251
N
sing
Y
252
N
doub
N
253
N
sing
Y
254
N
doub
N
255
N
sing
Y
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
sing
N
265
N
sing
N
266
N
doub
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
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
sing
N
295
N
sing
N
296
N
doub
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
sing
N
311
N
sing
N
312
N
doub
N
313
N
sing
N
314
N
sing
N
315
N
sing
N
316
N
sing
Y
317
N
doub
Y
318
N
sing
Y
319
N
sing
N
320
N
sing
Y
321
N
doub
Y
322
N
sing
Y
323
N
sing
N
324
N
sing
Y
325
N
sing
Y
326
N
doub
N
327
N
sing
Y
328
N
doub
N
329
N
sing
Y
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
Y
345
N
doub
Y
346
N
sing
Y
347
N
sing
N
348
N
sing
Y
349
N
doub
N
350
N
sing
Y
351
N
doub
N
352
N
sing
Y
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
sing
N
363
N
sing
N
364
N
doub
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
N
374
N
sing
N
375
N
sing
US
Biochemistry
BICHAW
0033
0006-2960
44
1097
1105
10.1021/bi0480279
15667203
Structural and kinetic characterization of active-site histidine as a proton shuttle in catalysis by human carbonic anhydrase II.
2005
10.2210/pdb1tb0/pdb
pdb_00001tb0
1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
1.000000
0.00000
0.00000
0.00000
293
1
Osmic Mirror
IMAGE PLATE
RIGAKU RAXIS IV
SINGLE WAVELENGTH
M
x-ray
1
1.54
1.0
1.54
ROTATING ANODE
RIGAKU RU200
29289.062
Carbonic anhydrase II
4.2.1.1
1
man
polymer
65.409
ZINC ION
1
syn
non-polymer
35.453
CHLORIDE ION
1
syn
non-polymer
18.015
water
91
nat
water
Carbonate dehydratase II, CA-II, Carbonic anhydrase C
no
no
MSHHWGYGKHNGPEHWHKDFPIAKGERQSPVDIDTHTAKYDPSLKPLSVSYDQATSLRILNNGHAFNVEFDDSQDKAVLK
GGPLDGTYRLIQFHFHWGSLDGQGSEHTVDKKKYAAELHLVHWNTKYGDFGKAVQQPDGLAVLGIFLKVGSAKPGLQKVV
DVLDSIKTKGKSADFTNFDPRGLLPESLDYWTYPGSLTTPPLLECVTWIVLKEPISVSSEQVLKFRKLNFNGEGEPEELM
VDNWRPAQPLKNRQIKASFK
MSHHWGYGKHNGPEHWHKDFPIAKGERQSPVDIDTHTAKYDPSLKPLSVSYDQATSLRILNNGHAFNVEFDDSQDKAVLK
GGPLDGTYRLIQFHFHWGSLDGQGSEHTVDKKKYAAELHLVHWNTKYGDFGKAVQQPDGLAVLGIFLKVGSAKPGLQKVV
DVLDSIKTKGKSADFTNFDPRGLLPESLDYWTYPGSLTTPPLLECVTWIVLKEPISVSSEQVLKFRKLNFNGEGEPEELM
VDNWRPAQPLKNRQIKASFK
X
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
human
Homo
Escherichia
Escherichia coli
sample
CA2
9606
Homo sapiens
469008
Escherichia coli BL21(DE3)
BL21 DE3
plasmid
pET31
1
2.15
42.70
VAPOR DIFFUSION, HANGING DROP
6.1
50 mM MES, 2.5 M ammonium sulfate, pH 6.1, VAPOR DIFFUSION, HANGING DROP, temperature 277K
277
pdbx_unobs_or_zero_occ_residues
software
chem_comp_atom
chem_comp_bond
database_2
pdbx_initial_refinement_model
pdbx_struct_conn_angle
pdbx_unobs_or_zero_occ_residues
struct_conn
struct_ref_seq_dif
struct_site
repository
Initial release
Version format compliance
Version format compliance
Advisory
Refinement description
Advisory
Data collection
Database references
Derived calculations
Refinement description
1
0
2005-01-25
1
1
2008-04-30
1
2
2011-07-13
1
3
2017-10-11
1
4
2023-08-23
_database_2.pdbx_DOI
_database_2.pdbx_database_accession
_pdbx_struct_conn_angle.ptnr1_auth_seq_id
_pdbx_struct_conn_angle.ptnr1_label_atom_id
_pdbx_struct_conn_angle.ptnr1_label_seq_id
_pdbx_struct_conn_angle.ptnr3_auth_seq_id
_pdbx_struct_conn_angle.ptnr3_label_atom_id
_pdbx_struct_conn_angle.ptnr3_label_seq_id
_pdbx_struct_conn_angle.value
_struct_conn.pdbx_dist_value
_struct_conn.ptnr1_auth_comp_id
_struct_conn.ptnr1_auth_seq_id
_struct_conn.ptnr1_label_asym_id
_struct_conn.ptnr1_label_atom_id
_struct_conn.ptnr1_label_comp_id
_struct_conn.ptnr1_label_seq_id
_struct_conn.ptnr2_auth_comp_id
_struct_conn.ptnr2_auth_seq_id
_struct_conn.ptnr2_label_asym_id
_struct_conn.ptnr2_label_atom_id
_struct_conn.ptnr2_label_comp_id
_struct_conn.ptnr2_label_seq_id
_struct_ref_seq_dif.details
_struct_site.pdbx_auth_asym_id
_struct_site.pdbx_auth_comp_id
_struct_site.pdbx_auth_seq_id
RCSB
Y
RCSB
2004-05-19
REL
REL
ZN
ZINC ION
CL
CHLORIDE ION
HOH
water
2CBA
pdb ENTRY 2CBA
PDB
experimental model
ZN
262
2
ZN
ZN
262
X
CL
264
3
CL
CL
264
X
HOH
263
4
HOH
HOH
265
X
HOH
1
4
HOH
HOH
266
X
HOH
2
4
HOH
HOH
267
X
HOH
3
4
HOH
HOH
268
X
HOH
4
4
HOH
HOH
269
X
HOH
5
4
HOH
HOH
270
X
HOH
6
4
HOH
HOH
271
X
HOH
7
4
HOH
HOH
272
X
HOH
8
4
HOH
HOH
273
X
HOH
9
4
HOH
HOH
274
X
HOH
10
4
HOH
HOH
275
X
HOH
11
4
HOH
HOH
276
X
HOH
12
4
HOH
HOH
277
X
HOH
13
4
HOH
HOH
278
X
HOH
14
4
HOH
HOH
279
X
HOH
15
4
HOH
HOH
280
X
HOH
16
4
HOH
HOH
281
X
HOH
17
4
HOH
HOH
282
X
HOH
18
4
HOH
HOH
283
X
HOH
19
4
HOH
HOH
284
X
HOH
20
4
HOH
HOH
285
X
HOH
21
4
HOH
HOH
286
X
HOH
22
4
HOH
HOH
287
X
HOH
23
4
HOH
HOH
288
X
HOH
24
4
HOH
HOH
289
X
HOH
25
4
HOH
HOH
290
X
HOH
26
4
HOH
HOH
291
X
HOH
27
4
HOH
HOH
292
X
HOH
28
4
HOH
HOH
293
X
HOH
29
4
HOH
HOH
294
X
HOH
30
4
HOH
HOH
295
X
HOH
31
4
HOH
HOH
296
X
HOH
32
4
HOH
HOH
297
X
HOH
33
4
HOH
HOH
298
X
HOH
34
4
HOH
HOH
299
X
HOH
35
4
HOH
HOH
300
X
HOH
36
4
HOH
HOH
301
X
HOH
37
4
HOH
HOH
302
X
HOH
38
4
HOH
HOH
303
X
HOH
39
4
HOH
HOH
304
X
HOH
40
4
HOH
HOH
305
X
HOH
41
4
HOH
HOH
306
X
HOH
42
4
HOH
HOH
307
X
HOH
43
4
HOH
HOH
308
X
HOH
44
4
HOH
HOH
309
X
HOH
45
4
HOH
HOH
310
X
HOH
46
4
HOH
HOH
311
X
HOH
47
4
HOH
HOH
312
X
HOH
48
4
HOH
HOH
313
X
HOH
50
4
HOH
HOH
314
X
HOH
51
4
HOH
HOH
315
X
HOH
52
4
HOH
HOH
316
X
HOH
54
4
HOH
HOH
317
X
HOH
55
4
HOH
HOH
318
X
HOH
56
4
HOH
HOH
319
X
HOH
57
4
HOH
HOH
320
X
HOH
58
4
HOH
HOH
321
X
HOH
59
4
HOH
HOH
322
X
HOH
60
4
HOH
HOH
323
X
HOH
61
4
HOH
HOH
324
X
HOH
62
4
HOH
HOH
325
X
HOH
63
4
HOH
HOH
326
X
HOH
64
4
HOH
HOH
327
X
HOH
65
4
HOH
HOH
328
X
HOH
66
4
HOH
HOH
329
X
HOH
67
4
HOH
HOH
330
X
HOH
69
4
HOH
HOH
331
X
HOH
70
4
HOH
HOH
332
X
HOH
71
4
HOH
HOH
333
X
HOH
72
4
HOH
HOH
334
X
HOH
73
4
HOH
HOH
335
X
HOH
74
4
HOH
HOH
336
X
HOH
75
4
HOH
HOH
337
X
HOH
76
4
HOH
HOH
338
X
HOH
78
4
HOH
HOH
339
X
HOH
79
4
HOH
HOH
340
X
HOH
80
4
HOH
HOH
341
X
HOH
81
4
HOH
HOH
342
X
HOH
82
4
HOH
HOH
343
X
HOH
83
4
HOH
HOH
344
X
HOH
84
4
HOH
HOH
345
X
HOH
86
4
HOH
HOH
346
X
HOH
87
4
HOH
HOH
347
X
HOH
88
4
HOH
HOH
348
X
HOH
89
4
HOH
HOH
349
X
HOH
90
4
HOH
HOH
350
X
HOH
91
4
HOH
HOH
351
X
HOH
92
4
HOH
HOH
352
X
HOH
93
4
HOH
HOH
353
X
HOH
94
4
HOH
HOH
354
X
HOH
95
4
HOH
HOH
355
X
n
1
1
X
n
2
2
X
HIS
3
n
3
HIS
3
X
HIS
4
n
4
HIS
4
X
TRP
5
n
5
TRP
5
X
GLY
6
n
6
GLY
6
X
TYR
7
n
7
TYR
7
X
GLY
8
n
8
GLY
8
X
LYS
9
n
9
LYS
9
X
HIS
10
n
10
HIS
10
X
ASN
11
n
11
ASN
11
X
GLY
12
n
12
GLY
12
X
PRO
13
n
13
PRO
13
X
GLU
14
n
14
GLU
14
X
HIS
15
n
15
HIS
15
X
TRP
16
n
16
TRP
16
X
HIS
17
n
17
HIS
17
X
LYS
18
n
18
LYS
18
X
ASP
19
n
19
ASP
19
X
PHE
20
n
20
PHE
20
X
PRO
21
n
21
PRO
21
X
ILE
22
n
22
ILE
22
X
ALA
23
n
23
ALA
23
X
LYS
24
n
24
LYS
24
X
GLY
25
n
25
GLY
25
X
GLU
26
n
26
GLU
26
X
ARG
27
n
27
ARG
27
X
GLN
28
n
28
GLN
28
X
SER
29
n
29
SER
29
X
PRO
30
n
30
PRO
30
X
VAL
31
n
31
VAL
31
X
ASP
32
n
32
ASP
32
X
ILE
33
n
33
ILE
33
X
ASP
34
n
34
ASP
34
X
THR
35
n
35
THR
35
X
HIS
36
n
36
HIS
36
X
THR
37
n
37
THR
37
X
ALA
38
n
38
ALA
38
X
LYS
39
n
39
LYS
39
X
TYR
40
n
40
TYR
40
X
ASP
41
n
41
ASP
41
X
PRO
42
n
42
PRO
42
X
SER
43
n
43
SER
43
X
LEU
44
n
44
LEU
44
X
LYS
45
n
45
LYS
45
X
PRO
46
n
46
PRO
46
X
LEU
47
n
47
LEU
47
X
SER
48
n
48
SER
48
X
VAL
49
n
49
VAL
49
X
SER
50
n
50
SER
50
X
TYR
51
n
51
TYR
51
X
ASP
52
n
52
ASP
52
X
GLN
53
n
53
GLN
53
X
ALA
54
n
54
ALA
54
X
THR
55
n
55
THR
55
X
SER
56
n
56
SER
56
X
LEU
57
n
57
LEU
57
X
ARG
58
n
58
ARG
58
X
ILE
59
n
59
ILE
59
X
LEU
60
n
60
LEU
60
X
ASN
61
n
61
ASN
61
X
ASN
62
n
62
ASN
62
X
GLY
63
n
63
GLY
63
X
HIS
64
n
64
HIS
64
X
ALA
65
n
65
ALA
65
X
PHE
66
n
66
PHE
66
X
ASN
67
n
67
ASN
67
X
VAL
68
n
68
VAL
68
X
GLU
69
n
69
GLU
69
X
PHE
70
n
70
PHE
70
X
ASP
71
n
71
ASP
71
X
ASP
72
n
72
ASP
72
X
SER
73
n
73
SER
73
X
GLN
74
n
74
GLN
74
X
ASP
75
n
75
ASP
75
X
LYS
76
n
76
LYS
76
X
ALA
77
n
77
ALA
77
X
VAL
78
n
78
VAL
78
X
LEU
79
n
79
LEU
79
X
LYS
80
n
80
LYS
80
X
GLY
81
n
81
GLY
81
X
GLY
82
n
82
GLY
82
X
PRO
83
n
83
PRO
83
X
LEU
84
n
84
LEU
84
X
ASP
85
n
85
ASP
85
X
GLY
86
n
86
GLY
86
X
THR
87
n
87
THR
87
X
TYR
88
n
88
TYR
88
X
ARG
89
n
89
ARG
89
X
LEU
90
n
90
LEU
90
X
ILE
91
n
91
ILE
91
X
GLN
92
n
92
GLN
92
X
PHE
93
n
93
PHE
93
X
HIS
94
n
94
HIS
94
X
PHE
95
n
95
PHE
95
X
HIS
96
n
96
HIS
96
X
TRP
97
n
97
TRP
97
X
GLY
98
n
98
GLY
98
X
SER
99
n
99
SER
99
X
LEU
100
n
100
LEU
100
X
ASP
101
n
101
ASP
101
X
GLY
102
n
102
GLY
102
X
GLN
103
n
103
GLN
103
X
GLY
104
n
104
GLY
104
X
SER
105
n
105
SER
105
X
GLU
106
n
106
GLU
106
X
HIS
107
n
107
HIS
107
X
THR
108
n
108
THR
108
X
VAL
109
n
109
VAL
109
X
ASP
110
n
110
ASP
110
X
LYS
111
n
111
LYS
111
X
LYS
112
n
112
LYS
112
X
LYS
113
n
113
LYS
113
X
TYR
114
n
114
TYR
114
X
ALA
115
n
115
ALA
115
X
ALA
116
n
116
ALA
116
X
GLU
117
n
117
GLU
117
X
LEU
118
n
118
LEU
118
X
HIS
119
n
119
HIS
119
X
LEU
120
n
120
LEU
120
X
VAL
121
n
121
VAL
121
X
HIS
122
n
122
HIS
122
X
TRP
123
n
123
TRP
123
X
ASN
124
n
124
ASN
124
X
THR
125
n
125
THR
125
X
LYS
127
n
126
LYS
127
X
TYR
128
n
127
TYR
128
X
GLY
129
n
128
GLY
129
X
ASP
130
n
129
ASP
130
X
PHE
131
n
130
PHE
131
X
GLY
132
n
131
GLY
132
X
LYS
133
n
132
LYS
133
X
ALA
134
n
133
ALA
134
X
VAL
135
n
134
VAL
135
X
GLN
136
n
135
GLN
136
X
GLN
137
n
136
GLN
137
X
PRO
138
n
137
PRO
138
X
ASP
139
n
138
ASP
139
X
GLY
140
n
139
GLY
140
X
LEU
141
n
140
LEU
141
X
ALA
142
n
141
ALA
142
X
VAL
143
n
142
VAL
143
X
LEU
144
n
143
LEU
144
X
GLY
145
n
144
GLY
145
X
ILE
146
n
145
ILE
146
X
PHE
147
n
146
PHE
147
X
LEU
148
n
147
LEU
148
X
LYS
149
n
148
LYS
149
X
VAL
150
n
149
VAL
150
X
GLY
151
n
150
GLY
151
X
SER
152
n
151
SER
152
X
ALA
153
n
152
ALA
153
X
LYS
154
n
153
LYS
154
X
PRO
155
n
154
PRO
155
X
GLY
156
n
155
GLY
156
X
LEU
157
n
156
LEU
157
X
GLN
158
n
157
GLN
158
X
LYS
159
n
158
LYS
159
X
VAL
160
n
159
VAL
160
X
VAL
161
n
160
VAL
161
X
ASP
162
n
161
ASP
162
X
VAL
163
n
162
VAL
163
X
LEU
164
n
163
LEU
164
X
ASP
165
n
164
ASP
165
X
SER
166
n
165
SER
166
X
ILE
167
n
166
ILE
167
X
LYS
168
n
167
LYS
168
X
THR
169
n
168
THR
169
X
LYS
170
n
169
LYS
170
X
GLY
171
n
170
GLY
171
X
LYS
172
n
171
LYS
172
X
SER
173
n
172
SER
173
X
ALA
174
n
173
ALA
174
X
ASP
175
n
174
ASP
175
X
PHE
176
n
175
PHE
176
X
THR
177
n
176
THR
177
X
ASN
178
n
177
ASN
178
X
PHE
179
n
178
PHE
179
X
ASP
180
n
179
ASP
180
X
PRO
181
n
180
PRO
181
X
ARG
182
n
181
ARG
182
X
GLY
183
n
182
GLY
183
X
LEU
184
n
183
LEU
184
X
LEU
185
n
184
LEU
185
X
PRO
186
n
185
PRO
186
X
GLU
187
n
186
GLU
187
X
SER
188
n
187
SER
188
X
LEU
189
n
188
LEU
189
X
ASP
190
n
189
ASP
190
X
TYR
191
n
190
TYR
191
X
TRP
192
n
191
TRP
192
X
THR
193
n
192
THR
193
X
TYR
194
n
193
TYR
194
X
PRO
195
n
194
PRO
195
X
GLY
196
n
195
GLY
196
X
SER
197
n
196
SER
197
X
LEU
198
n
197
LEU
198
X
THR
199
n
198
THR
199
X
THR
200
n
199
THR
200
X
PRO
201
n
200
PRO
201
X
PRO
202
n
201
PRO
202
X
LEU
203
n
202
LEU
203
X
LEU
204
n
203
LEU
204
X
GLU
205
n
204
GLU
205
X
CYS
206
n
205
CYS
206
X
VAL
207
n
206
VAL
207
X
THR
208
n
207
THR
208
X
TRP
209
n
208
TRP
209
X
ILE
210
n
209
ILE
210
X
VAL
211
n
210
VAL
211
X
LEU
212
n
211
LEU
212
X
LYS
213
n
212
LYS
213
X
GLU
214
n
213
GLU
214
X
PRO
215
n
214
PRO
215
X
ILE
216
n
215
ILE
216
X
SER
217
n
216
SER
217
X
VAL
218
n
217
VAL
218
X
SER
219
n
218
SER
219
X
SER
220
n
219
SER
220
X
GLU
221
n
220
GLU
221
X
GLN
222
n
221
GLN
222
X
VAL
223
n
222
VAL
223
X
LEU
224
n
223
LEU
224
X
LYS
225
n
224
LYS
225
X
PHE
226
n
225
PHE
226
X
ARG
227
n
226
ARG
227
X
LYS
228
n
227
LYS
228
X
LEU
229
n
228
LEU
229
X
ASN
230
n
229
ASN
230
X
PHE
231
n
230
PHE
231
X
ASN
232
n
231
ASN
232
X
GLY
233
n
232
GLY
233
X
GLU
234
n
233
GLU
234
X
GLY
235
n
234
GLY
235
X
GLU
236
n
235
GLU
236
X
PRO
237
n
236
PRO
237
X
GLU
238
n
237
GLU
238
X
GLU
239
n
238
GLU
239
X
LEU
240
n
239
LEU
240
X
MET
241
n
240
MET
241
X
VAL
242
n
241
VAL
242
X
ASP
243
n
242
ASP
243
X
ASN
244
n
243
ASN
244
X
TRP
245
n
244
TRP
245
X
ARG
246
n
245
ARG
246
X
PRO
247
n
246
PRO
247
X
ALA
248
n
247
ALA
248
X
GLN
249
n
248
GLN
249
X
PRO
250
n
249
PRO
250
X
LEU
251
n
250
LEU
251
X
LYS
252
n
251
LYS
252
X
ASN
253
n
252
ASN
253
X
ARG
254
n
253
ARG
254
X
GLN
255
n
254
GLN
255
X
ILE
256
n
255
ILE
256
X
LYS
257
n
256
LYS
257
X
ALA
258
n
257
ALA
258
X
SER
259
n
258
SER
259
X
PHE
260
n
259
PHE
260
X
LYS
261
n
260
LYS
261
X
author_defined_assembly
1
monomeric
X
HIS
94
A
NE2
HIS
94
1_555
X
ZN
262
B
ZN
ZN
1_555
X
HIS
96
A
NE2
HIS
96
1_555
106.6
X
HIS
94
A
NE2
HIS
94
1_555
X
ZN
262
B
ZN
ZN
1_555
X
HIS
119
A
ND1
HIS
119
1_555
117.8
X
HIS
96
A
NE2
HIS
96
1_555
X
ZN
262
B
ZN
ZN
1_555
X
HIS
119
A
ND1
HIS
119
1_555
98.3
X
HIS
94
A
NE2
HIS
94
1_555
X
ZN
262
B
ZN
ZN
1_555
X
HOH
265
D
O
HOH
1_555
108.3
X
HIS
96
A
NE2
HIS
96
1_555
X
ZN
262
B
ZN
ZN
1_555
X
HOH
265
D
O
HOH
1_555
108.9
X
HIS
119
A
ND1
HIS
119
1_555
X
ZN
262
B
ZN
ZN
1_555
X
HOH
265
D
O
HOH
1_555
115.9
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
X
N
ILE
33
A
N
ILE
33
X
O
THR
108
A
O
THR
108
X
N
LYS
39
A
N
LYS
39
X
O
ALA
258
A
O
ALA
257
X
O
LYS
257
A
O
LYS
256
X
N
THR
193
A
N
THR
192
X
N
GLY
196
A
N
GLY
195
X
O
VAL
207
A
O
VAL
206
X
O
ILE
210
A
O
ILE
209
X
N
GLY
145
A
N
GLY
144
X
O
ILE
146
A
O
ILE
145
X
N
LEU
118
A
N
LEU
118
X
O
VAL
121
A
O
VAL
121
X
N
GLN
92
A
N
GLN
92
X
O
PHE
93
A
O
PHE
93
X
N
VAL
68
A
N
VAL
68
X
O
GLU
69
A
O
GLU
69
X
N
LEU
57
A
N
LEU
57
X
N
ILE
59
A
N
ILE
59
X
O
ALA
174
A
O
ALA
173
X
N
SER
50
A
N
SER
50
X
O
VAL
78
A
O
VAL
78
X
N
LEU
79
A
N
LEU
79
X
O
TYR
88
A
O
TYR
88
X
N
GLN
92
A
N
GLN
92
X
O
VAL
121
A
O
VAL
121
X
N
LEU
118
A
N
LEU
118
X
O
ILE
146
A
O
ILE
145
X
N
GLY
151
A
N
GLY
150
X
O
VAL
218
A
O
VAL
217
1
X
MET
1
A
MET
1
1
Y
1
X
SER
2
A
SER
2
1
Y
1
X
CL
264
C
CL
0
N
1
X
X
GLU
GLY
234
235
-63.74
1
3.23
0.50
120.30
123.53
X
X
X
NE
CZ
NH1
ARG
ARG
ARG
89
89
89
N
1
-3.97
0.50
120.30
116.33
X
X
X
NE
CZ
NH2
ARG
ARG
ARG
89
89
89
N
1
6.92
0.90
118.30
125.22
X
X
X
CB
CG
OD2
ASP
ASP
ASP
130
130
130
N
1
6.80
0.90
118.30
125.10
X
X
X
CB
CG
OD1
ASP
ASP
ASP
139
139
139
N
1
6.69
0.90
118.30
124.99
X
X
X
CB
CG
OD2
ASP
ASP
ASP
175
175
175
N
1
X
X
CD1
CE1
TYR
TYR
51
51
0.101
0.015
1.389
1.490
N
1
X
X
CA
CB
ALA
ALA
116
116
0.131
0.021
1.520
1.651
N
1
X
X
CB
CG2
VAL
VAL
242
242
0.160
0.021
1.524
1.684
N
1
X
ASN
11
-141.11
15.45
1
X
GLU
205
-102.12
66.24
1
X
LYS
252
53.91
-141.38
0.205
0.144
2.0
20.0
1
Random
MOLECULAR REPLACEMENT
pdb ENTRY 2CBA
Engh & Huber
2.0
20.0
91
2163
2
0
2070
0.029
2.154
2.0
20.0
1TB0
16365
0.12
1
2.0
2.07
0.447
95.9
data scaling
SCALEPACK
phasing
AMoRE
refinement
REFMAC
5.0
Effect of Shuttle Location and pH Environment on H+ Transfer in Human Carbonic Anhydrase II
1
N
N
2
N
N
3
N
N
4
N
N
X
HIS
15
A
HIS
15
HELX_P
X
ASP
19
A
ASP
19
5
1
5
X
PHE
20
A
PHE
20
HELX_P
X
GLY
25
A
GLY
25
5
2
6
X
LYS
127
A
LYS
126
HELX_P
X
GLY
129
A
GLY
128
5
3
3
X
ASP
130
A
ASP
129
HELX_P
X
VAL
135
A
VAL
134
1
4
6
X
LYS
154
A
LYS
153
HELX_P
X
GLY
156
A
GLY
155
5
5
3
X
LEU
157
A
LEU
156
HELX_P
X
LEU
164
A
LEU
163
1
6
8
X
ASP
165
A
ASP
164
HELX_P
X
LYS
168
A
LYS
167
5
7
4
X
ASP
180
A
ASP
179
HELX_P
X
LEU
185
A
LEU
184
5
8
6
X
SER
220
A
SER
219
HELX_P
X
ARG
227
A
ARG
226
1
9
8
metalc
1.981
X
HIS
94
A
NE2
HIS
94
1_555
X
ZN
262
B
ZN
ZN
1_555
metalc
1.929
X
HIS
96
A
NE2
HIS
96
1_555
X
ZN
262
B
ZN
ZN
1_555
metalc
1.947
X
HIS
119
A
ND1
HIS
119
1_555
X
ZN
262
B
ZN
ZN
1_555
metalc
2.009
X
ZN
262
B
ZN
ZN
1_555
X
HOH
265
D
O
HOH
1_555
LYASE
proton shuttle carbonic anhydrase metalloenzyme, LYASE
X
SER
29
A
SER
29
1
X
PRO
30
A
PRO
30
-1.83
X
PRO
201
A
PRO
200
1
X
PRO
202
A
PRO
201
9.78
CAH2_HUMAN
UNP
1
1
P00918
SHHWGYGKHNGPEHWHKDFPIAKGERQSPVDIDTHTAKYDPSLKPLSVSYDQATSLRILNNGHAFNVEFDDSQDKAVLKG
GPLDGTYRLIQFHFHWGSLDGQGSEHTVDKKKYAAELHLVHWNTKYGDFGKAVQQPDGLAVLGIFLKVGSAKPGLQKVVD
VLDSIKTKGKSADFTNFDPRGLLPESLDYWTYPGSLTTPPLLECVTWIVLKEPISVSSEQVLKFRKLNFNGEGEPEELMV
DNWRPAQPLKNRQIKASFK
1
259
1TB0
2
260
P00918
X
1
2
259
1
initiating methionine
MET
1
1TB0
X
P00918
UNP
1
2
10
6
parallel
parallel
anti-parallel
anti-parallel
parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
anti-parallel
parallel
X
ASP
32
A
ASP
32
X
ILE
33
A
ILE
33
X
THR
108
A
THR
108
X
VAL
109
A
VAL
109
X
LYS
39
A
LYS
39
X
TYR
40
A
TYR
40
X
LYS
257
A
LYS
256
X
ALA
258
A
ALA
257
X
TYR
191
A
TYR
190
X
GLY
196
A
GLY
195
X
VAL
207
A
VAL
206
X
LEU
212
A
LEU
211
X
LEU
141
A
LEU
140
X
GLY
151
A
GLY
150
X
ALA
116
A
ALA
116
X
ASN
124
A
ASN
124
X
TYR
88
A
TYR
88
X
TRP
97
A
TRP
97
X
PHE
66
A
PHE
66
X
PHE
70
A
PHE
70
X
SER
56
A
SER
56
X
ASN
61
A
ASN
61
X
SER
173
A
SER
172
X
ASP
175
A
ASP
174
X
LEU
47
A
LEU
47
X
SER
50
A
SER
50
X
VAL
78
A
VAL
78
X
GLY
81
A
GLY
81
X
TYR
88
A
TYR
88
X
TRP
97
A
TRP
97
X
ALA
116
A
ALA
116
X
ASN
124
A
ASN
124
X
LEU
141
A
LEU
140
X
GLY
151
A
GLY
150
X
ILE
216
A
ILE
215
X
SER
219
A
SER
218
BINDING SITE FOR RESIDUE ZN X 262
X
ZN
262
Software
4
X
HIS
94
A
HIS
94
4
1_555
X
HIS
96
A
HIS
96
4
1_555
X
HIS
119
A
HIS
119
4
1_555
X
HOH
265
D
HOH
4
1_555
4
P 1 21 1