0.019372
0.011184
0.000000
0.000000
0.022368
0.000000
0.000000
0.000000
0.008971
0.00000
0.00000
0.00000
Wong, M.V.
Jiang, S.
Palasingam, P.
Kolatkar, P.R.
http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic
12
90.00
90.00
120.00
51.622
51.622
111.474
C2 H3 O2 -1
59.044
ACETATE ION
non-polymer
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
K 1
39.098
POTASSIUM ION
non-polymer
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
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
C
N
2
N
O
N
3
N
O
N
4
N
C
N
5
N
H
N
6
N
H
N
7
N
H
N
8
N
N
N
9
S
C
N
10
N
C
N
11
N
O
N
12
N
C
N
13
N
O
N
14
N
H
N
15
N
H
N
16
N
H
N
17
N
H
N
18
N
H
N
19
N
H
N
20
N
H
N
21
N
N
N
22
S
C
N
23
N
C
N
24
N
O
N
25
N
C
N
26
N
C
N
27
N
C
N
28
N
N
N
29
N
C
N
30
N
N
N
31
N
N
N
32
N
O
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
H
N
42
N
H
N
43
N
H
N
44
N
H
N
45
N
H
N
46
N
H
N
47
N
H
N
48
N
N
N
49
S
C
N
50
N
C
N
51
N
O
N
52
N
C
N
53
N
C
N
54
N
O
N
55
N
N
N
56
N
O
N
57
N
H
N
58
N
H
N
59
N
H
N
60
N
H
N
61
N
H
N
62
N
H
N
63
N
H
N
64
N
H
N
65
N
N
N
66
S
C
N
67
N
C
N
68
N
O
N
69
N
C
N
70
N
C
N
71
N
O
N
72
N
O
N
73
N
O
N
74
N
H
N
75
N
H
N
76
N
H
N
77
N
H
N
78
N
H
N
79
N
H
N
80
N
H
N
81
N
N
N
82
R
C
N
83
N
C
N
84
N
O
N
85
N
C
N
86
N
S
N
87
N
O
N
88
N
H
N
89
N
H
N
90
N
H
N
91
N
H
N
92
N
H
N
93
N
H
N
94
N
H
N
95
N
N
N
96
S
C
N
97
N
C
N
98
N
O
N
99
N
C
N
100
N
C
N
101
N
C
N
102
N
O
N
103
N
N
N
104
N
O
N
105
N
H
N
106
N
H
N
107
N
H
N
108
N
H
N
109
N
H
N
110
N
H
N
111
N
H
N
112
N
H
N
113
N
H
N
114
N
H
N
115
N
N
N
116
S
C
N
117
N
C
N
118
N
O
N
119
N
C
N
120
N
C
N
121
N
C
N
122
N
O
N
123
N
O
N
124
N
O
N
125
N
H
N
126
N
H
N
127
N
H
N
128
N
H
N
129
N
H
N
130
N
H
N
131
N
H
N
132
N
H
N
133
N
H
N
134
N
N
N
135
N
C
N
136
N
C
N
137
N
O
N
138
N
O
N
139
N
H
N
140
N
H
N
141
N
H
N
142
N
H
N
143
N
H
N
144
N
N
N
145
S
C
N
146
N
C
N
147
N
O
N
148
N
C
Y
149
N
C
Y
150
N
N
Y
151
N
C
Y
152
N
C
Y
153
N
N
N
154
N
O
N
155
N
H
N
156
N
H
N
157
N
H
N
158
N
H
N
159
N
H
N
160
N
H
N
161
N
H
N
162
N
H
N
163
N
H
N
164
N
H
N
165
N
O
N
166
N
H
N
167
N
H
N
168
N
N
N
169
S
C
N
170
N
C
N
171
N
O
N
172
S
C
N
173
N
C
N
174
N
C
N
175
N
C
N
176
N
O
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
H
N
185
N
H
N
186
N
H
N
187
N
H
N
188
N
H
N
189
N
H
N
190
N
K
N
191
N
N
N
192
S
C
N
193
N
C
N
194
N
O
N
195
N
C
N
196
N
C
N
197
N
C
N
198
N
C
N
199
N
O
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
H
N
207
N
H
N
208
N
H
N
209
N
H
N
210
N
H
N
211
N
H
N
212
N
H
N
213
N
N
N
214
S
C
N
215
N
C
N
216
N
O
N
217
N
C
N
218
N
C
N
219
N
C
N
220
N
C
N
221
N
N
N
222
N
O
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
H
N
232
N
H
N
233
N
H
N
234
N
H
N
235
N
H
N
236
N
H
N
237
N
H
N
238
N
N
N
239
S
C
N
240
N
C
N
241
N
O
N
242
N
C
N
243
N
C
N
244
N
S
N
245
N
C
N
246
N
O
N
247
N
H
N
248
N
H
N
249
N
H
N
250
N
H
N
251
N
H
N
252
N
H
N
253
N
H
N
254
N
H
N
255
N
H
N
256
N
H
N
257
N
H
N
258
N
N
N
259
S
C
N
260
N
C
N
261
N
O
N
262
N
C
Y
263
N
C
Y
264
N
C
Y
265
N
C
Y
266
N
C
Y
267
N
C
Y
268
N
C
N
269
N
O
N
270
N
H
N
271
N
H
N
272
N
H
N
273
N
H
N
274
N
H
N
275
N
H
N
276
N
H
N
277
N
H
N
278
N
H
N
279
N
H
N
280
N
H
N
281
N
N
N
282
S
C
N
283
N
C
N
284
N
O
N
285
N
C
N
286
N
C
N
287
N
C
N
288
N
O
N
289
N
H
N
290
N
H
N
291
N
H
N
292
N
H
N
293
N
H
N
294
N
H
N
295
N
H
N
296
N
H
N
297
N
H
N
298
N
N
N
299
S
C
N
300
N
C
N
301
N
O
N
302
N
C
N
303
N
O
N
304
N
O
N
305
N
H
N
306
N
H
N
307
N
H
N
308
N
H
N
309
N
H
N
310
N
H
N
311
N
H
N
312
N
N
N
313
S
C
N
314
N
C
N
315
N
O
N
316
R
C
N
317
N
O
N
318
N
C
N
319
N
O
N
320
N
H
N
321
N
H
N
322
N
H
N
323
N
H
N
324
N
H
N
325
N
H
N
326
N
H
N
327
N
H
N
328
N
H
N
329
N
N
N
330
S
C
N
331
N
C
N
332
N
O
N
333
N
C
Y
334
N
C
Y
335
N
C
Y
336
N
C
Y
337
N
C
Y
338
N
C
Y
339
N
C
N
340
N
O
N
341
N
O
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
H
N
350
N
H
N
351
N
H
N
352
N
H
N
353
N
N
N
354
S
C
N
355
N
C
N
356
N
O
N
357
N
C
N
358
N
C
N
359
N
C
N
360
N
O
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
H
N
370
N
H
N
371
N
H
N
1
N
doub
N
2
N
sing
N
3
N
sing
N
4
N
sing
N
5
N
sing
N
6
N
sing
N
7
N
sing
N
8
N
sing
N
9
N
sing
N
10
N
sing
N
11
N
sing
N
12
N
sing
N
13
N
doub
N
14
N
sing
N
15
N
sing
N
16
N
sing
N
17
N
sing
N
18
N
sing
N
19
N
sing
N
20
N
sing
N
21
N
sing
N
22
N
sing
N
23
N
sing
N
24
N
sing
N
25
N
doub
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
sing
N
34
N
sing
N
35
N
sing
N
36
N
sing
N
37
N
sing
N
38
N
sing
N
39
N
doub
N
40
N
sing
N
41
N
sing
N
42
N
sing
N
43
N
sing
N
44
N
sing
N
45
N
sing
N
46
N
sing
N
47
N
sing
N
48
N
sing
N
49
N
sing
N
50
N
sing
N
51
N
doub
N
52
N
sing
N
53
N
sing
N
54
N
sing
N
55
N
sing
N
56
N
doub
N
57
N
sing
N
58
N
sing
N
59
N
sing
N
60
N
sing
N
61
N
sing
N
62
N
sing
N
63
N
sing
N
64
N
sing
N
65
N
sing
N
66
N
sing
N
67
N
doub
N
68
N
sing
N
69
N
sing
N
70
N
sing
N
71
N
sing
N
72
N
doub
N
73
N
sing
N
74
N
sing
N
75
N
sing
N
76
N
sing
N
77
N
sing
N
78
N
sing
N
79
N
sing
N
80
N
sing
N
81
N
sing
N
82
N
doub
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
sing
N
90
N
sing
N
91
N
sing
N
92
N
sing
N
93
N
sing
N
94
N
sing
N
95
N
doub
N
96
N
sing
N
97
N
sing
N
98
N
sing
N
99
N
sing
N
100
N
sing
N
101
N
sing
N
102
N
sing
N
103
N
doub
N
104
N
sing
N
105
N
sing
N
106
N
sing
N
107
N
sing
N
108
N
sing
N
109
N
sing
N
110
N
sing
N
111
N
sing
N
112
N
sing
N
113
N
sing
N
114
N
doub
N
115
N
sing
N
116
N
sing
N
117
N
sing
N
118
N
sing
N
119
N
sing
N
120
N
sing
N
121
N
sing
N
122
N
doub
N
123
N
sing
N
124
N
sing
N
125
N
sing
N
126
N
sing
N
127
N
sing
N
128
N
sing
N
129
N
sing
N
130
N
sing
N
131
N
sing
N
132
N
doub
N
133
N
sing
N
134
N
sing
N
135
N
sing
N
136
N
sing
N
137
N
sing
N
138
N
sing
N
139
N
sing
N
140
N
sing
N
141
N
doub
N
142
N
sing
N
143
N
sing
N
144
N
sing
N
145
N
sing
Y
146
N
sing
Y
147
N
doub
Y
148
N
doub
N
149
N
sing
Y
150
N
sing
N
151
N
sing
Y
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
sing
N
159
N
sing
N
160
N
sing
N
161
N
sing
N
162
N
sing
N
163
N
sing
N
164
N
doub
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
sing
N
180
N
sing
N
181
N
sing
N
182
N
sing
N
183
N
sing
N
184
N
sing
N
185
N
doub
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
sing
N
201
N
sing
N
202
N
sing
N
203
N
sing
N
204
N
sing
N
205
N
sing
N
206
N
doub
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
sing
N
225
N
sing
N
226
N
sing
N
227
N
sing
N
228
N
sing
N
229
N
sing
N
230
N
doub
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
sing
N
244
N
sing
N
245
N
sing
N
246
N
sing
N
247
N
sing
N
248
N
sing
N
249
N
doub
N
250
N
sing
N
251
N
sing
N
252
N
sing
N
253
N
sing
Y
254
N
doub
Y
255
N
sing
Y
256
N
sing
N
257
N
sing
Y
258
N
doub
N
259
N
sing
Y
260
N
doub
N
261
N
sing
Y
262
N
sing
N
263
N
sing
N
264
N
sing
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
doub
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
sing
N
284
N
sing
N
285
N
sing
N
286
N
sing
N
287
N
sing
N
288
N
sing
N
289
N
doub
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
sing
N
297
N
sing
N
298
N
sing
N
299
N
sing
N
300
N
sing
N
301
N
sing
N
302
N
doub
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
sing
N
313
N
sing
N
314
N
sing
N
315
N
sing
N
316
N
sing
N
317
N
sing
N
318
N
doub
N
319
N
sing
N
320
N
sing
N
321
N
sing
N
322
N
sing
Y
323
N
doub
Y
324
N
sing
Y
325
N
sing
N
326
N
sing
Y
327
N
doub
N
328
N
sing
Y
329
N
doub
N
330
N
sing
Y
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
sing
N
341
N
sing
N
342
N
doub
N
343
N
sing
N
344
N
sing
N
345
N
sing
N
346
N
sing
N
347
N
sing
N
348
N
sing
N
349
N
sing
N
350
N
sing
N
351
N
sing
N
352
N
sing
N
353
N
sing
US
Plos One
1932-6203
7
48591
10.1371/JOURNAL.PONE.0048591
23119064
A Divalent Ion is Crucial in the Structure and Dominant-Negative Function of Id Proteins, a Class of Helix-Loop-Helix Transcription Regulators.
2012
10.2210/pdb4aya/pdb
pdb_00004aya
1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
1.000000
0.00000
0.00000
0.00000
103
1
CCD
2009-06-29
ADSC CCD
SINGLE WAVELENGTH
M
x-ray
1
1.080900
1.0
X29A
NSLS
1.080900
SYNCHROTRON
NSLS BEAMLINE X29A
10844.563
DNA-BINDING PROTEIN INHIBITOR ID-2
HELIX-LOOP-HELIX DOMAIN, RESIDUES 1-82
2
man
polymer
39.098
POTASSIUM ION
2
syn
non-polymer
59.044
ACETATE ION
1
syn
non-polymer
18.015
water
24
nat
water
CLASS D BASIC HELIX-LOOP-HELIX PROTEIN 26, CLASS B BASIC HELIX-LOOP-HELIX PROTEIN 26, BHLHB26, INHIBITOR OF DNA BINDING 2
no
no
GMKAFSPVRSVRKNSLSDHSLGISRSKTPVDDPMSLLYNMNDCYSKLKELVPSIPQNKKVSKMEILQHVIDYILDLQIAL
DSHLKPSFLVQSGDIAS
GMKAFSPVRSVRKNSLSDHSLGISRSKTPVDDPMSLLYNMNDCYSKLKELVPSIPQNKKVSKMEILQHVIDYILDLQIAL
DSHLKPSFLVQSGDIAS
A,B
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
HUMAN
sample
9606
HOMO SAPIENS
469008
ESCHERICHIA COLI
BL21(DE3)
PLASMID
PDEST-565
1
1.98
37.8
6.5
PROTEIN WAS CRYSTALLIZED FROM 0.1 M MES PH6.5, 2.0 M POTASSIUM ACETATE
chem_comp_atom
chem_comp_bond
database_2
pdbx_database_status
pdbx_initial_refinement_model
pdbx_struct_conn_angle
struct_conn
struct_site
repository
Initial release
Data collection
Database references
Derived calculations
Other
Refinement description
1
0
2012-11-14
1
1
2024-05-01
_database_2.pdbx_DOI
_database_2.pdbx_database_accession
_pdbx_database_status.status_code_sf
_pdbx_struct_conn_angle.ptnr1_auth_comp_id
_pdbx_struct_conn_angle.ptnr1_auth_seq_id
_pdbx_struct_conn_angle.ptnr1_label_asym_id
_pdbx_struct_conn_angle.ptnr1_label_atom_id
_pdbx_struct_conn_angle.ptnr1_label_comp_id
_pdbx_struct_conn_angle.ptnr1_label_seq_id
_pdbx_struct_conn_angle.ptnr3_auth_comp_id
_pdbx_struct_conn_angle.ptnr3_auth_seq_id
_pdbx_struct_conn_angle.ptnr3_label_asym_id
_pdbx_struct_conn_angle.ptnr3_label_atom_id
_pdbx_struct_conn_angle.ptnr3_label_comp_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_site.pdbx_auth_asym_id
_struct_site.pdbx_auth_comp_id
_struct_site.pdbx_auth_seq_id
PDBE
Y
PDBE
2012-06-19
REL
REL
K
POTASSIUM ION
ACT
ACETATE ION
HOH
water
FIRST RESIDUE IN SEQUENCE AFTER TEV CLEAVAGE IS A GLYCINE.
ID2 SEQUENCE NUMBERING STARTS FROM SECOND RESIDUE,
METHIONINE. RESIDUE 83 ONWARDS CONTAINS THE C-TERMINAL
STABILIZER POLYPEPTIDE.
INTERNAL SELENOMETHIONINE-SUBSTITUTED ID2 STRUCTURE AT 3.0A
Other
experimental model
K
1089
2
K
K
1089
A
ACT
1090
3
ACT
ACT
1090
A
K
1083
2
K
K
1083
B
HOH
2001
4
HOH
HOH
2001
A
HOH
2002
4
HOH
HOH
2002
A
HOH
2003
4
HOH
HOH
2003
A
HOH
2004
4
HOH
HOH
2004
A
HOH
2005
4
HOH
HOH
2005
A
HOH
2006
4
HOH
HOH
2006
A
HOH
2007
4
HOH
HOH
2007
A
HOH
2001
4
HOH
HOH
2001
B
HOH
2002
4
HOH
HOH
2002
B
HOH
2003
4
HOH
HOH
2003
B
HOH
2004
4
HOH
HOH
2004
B
HOH
2005
4
HOH
HOH
2005
B
HOH
2006
4
HOH
HOH
2006
B
HOH
2007
4
HOH
HOH
2007
B
HOH
2008
4
HOH
HOH
2008
B
HOH
2009
4
HOH
HOH
2009
B
HOH
2010
4
HOH
HOH
2010
B
HOH
2011
4
HOH
HOH
2011
B
HOH
2012
4
HOH
HOH
2012
B
HOH
2013
4
HOH
HOH
2013
B
HOH
2014
4
HOH
HOH
2014
B
HOH
2015
4
HOH
HOH
2015
B
HOH
2016
4
HOH
HOH
2016
B
HOH
2017
4
HOH
HOH
2017
B
n
1
0
A
n
2
1
A
n
3
2
A
n
4
3
A
n
5
4
A
n
6
5
A
n
7
6
A
n
8
7
A
n
9
8
A
n
10
9
A
n
11
10
A
n
12
11
A
n
13
12
A
n
14
13
A
n
15
14
A
n
16
15
A
n
17
16
A
n
18
17
A
n
19
18
A
n
20
19
A
n
21
20
A
n
22
21
A
n
23
22
A
n
24
23
A
n
25
24
A
n
26
25
A
n
27
26
A
n
28
27
A
n
29
28
A
n
30
29
A
ASP
30
n
31
ASP
30
A
ASP
31
n
32
ASP
31
A
PRO
32
n
33
PRO
32
A
MET
33
n
34
MET
33
A
SER
34
n
35
SER
34
A
LEU
35
n
36
LEU
35
A
LEU
36
n
37
LEU
36
A
TYR
37
n
38
TYR
37
A
ASN
38
n
39
ASN
38
A
MET
39
n
40
MET
39
A
ASN
40
n
41
ASN
40
A
ASP
41
n
42
ASP
41
A
CYS
42
n
43
CYS
42
A
TYR
43
n
44
TYR
43
A
SER
44
n
45
SER
44
A
LYS
45
n
46
LYS
45
A
LEU
46
n
47
LEU
46
A
LYS
47
n
48
LYS
47
A
GLU
48
n
49
GLU
48
A
LEU
49
n
50
LEU
49
A
VAL
50
n
51
VAL
50
A
PRO
51
n
52
PRO
51
A
SER
52
n
53
SER
52
A
ILE
53
n
54
ILE
53
A
PRO
54
n
55
PRO
54
A
GLN
55
n
56
GLN
55
A
ASN
56
n
57
ASN
56
A
LYS
57
n
58
LYS
57
A
LYS
58
n
59
LYS
58
A
VAL
59
n
60
VAL
59
A
SER
60
n
61
SER
60
A
LYS
61
n
62
LYS
61
A
MET
62
n
63
MET
62
A
GLU
63
n
64
GLU
63
A
ILE
64
n
65
ILE
64
A
LEU
65
n
66
LEU
65
A
GLN
66
n
67
GLN
66
A
HIS
67
n
68
HIS
67
A
VAL
68
n
69
VAL
68
A
ILE
69
n
70
ILE
69
A
ASP
70
n
71
ASP
70
A
TYR
71
n
72
TYR
71
A
ILE
72
n
73
ILE
72
A
LEU
73
n
74
LEU
73
A
ASP
74
n
75
ASP
74
A
LEU
75
n
76
LEU
75
A
GLN
76
n
77
GLN
76
A
ILE
77
n
78
ILE
77
A
ALA
78
n
79
ALA
78
A
LEU
79
n
80
LEU
79
A
ASP
80
n
81
ASP
80
A
SER
81
n
82
SER
81
A
HIS
82
n
83
HIS
82
A
LEU
83
n
84
LEU
83
A
LYS
84
n
85
LYS
84
A
PRO
85
n
86
PRO
85
A
SER
86
n
87
SER
86
A
PHE
87
n
88
PHE
87
A
LEU
88
n
89
LEU
88
A
n
90
89
A
n
91
90
A
n
92
91
A
n
93
92
A
n
94
93
A
n
95
94
A
n
96
95
A
n
97
96
A
n
1
0
B
n
2
1
B
n
3
2
B
n
4
3
B
n
5
4
B
n
6
5
B
n
7
6
B
n
8
7
B
n
9
8
B
n
10
9
B
n
11
10
B
n
12
11
B
n
13
12
B
n
14
13
B
n
15
14
B
n
16
15
B
n
17
16
B
n
18
17
B
n
19
18
B
n
20
19
B
n
21
20
B
n
22
21
B
n
23
22
B
n
24
23
B
n
25
24
B
n
26
25
B
n
27
26
B
n
28
27
B
n
29
28
B
n
30
29
B
n
31
30
B
n
32
31
B
n
33
32
B
n
34
33
B
n
35
34
B
LEU
35
n
36
LEU
35
B
LEU
36
n
37
LEU
36
B
TYR
37
n
38
TYR
37
B
ASN
38
n
39
ASN
38
B
MET
39
n
40
MET
39
B
ASN
40
n
41
ASN
40
B
ASP
41
n
42
ASP
41
B
CYS
42
n
43
CYS
42
B
TYR
43
n
44
TYR
43
B
SER
44
n
45
SER
44
B
LYS
45
n
46
LYS
45
B
LEU
46
n
47
LEU
46
B
LYS
47
n
48
LYS
47
B
GLU
48
n
49
GLU
48
B
LEU
49
n
50
LEU
49
B
VAL
50
n
51
VAL
50
B
PRO
51
n
52
PRO
51
B
SER
52
n
53
SER
52
B
ILE
53
n
54
ILE
53
B
PRO
54
n
55
PRO
54
B
GLN
55
n
56
GLN
55
B
ASN
56
n
57
ASN
56
B
LYS
57
n
58
LYS
57
B
LYS
58
n
59
LYS
58
B
VAL
59
n
60
VAL
59
B
SER
60
n
61
SER
60
B
LYS
61
n
62
LYS
61
B
MET
62
n
63
MET
62
B
GLU
63
n
64
GLU
63
B
ILE
64
n
65
ILE
64
B
LEU
65
n
66
LEU
65
B
GLN
66
n
67
GLN
66
B
HIS
67
n
68
HIS
67
B
VAL
68
n
69
VAL
68
B
ILE
69
n
70
ILE
69
B
ASP
70
n
71
ASP
70
B
TYR
71
n
72
TYR
71
B
ILE
72
n
73
ILE
72
B
LEU
73
n
74
LEU
73
B
ASP
74
n
75
ASP
74
B
LEU
75
n
76
LEU
75
B
GLN
76
n
77
GLN
76
B
ILE
77
n
78
ILE
77
B
ALA
78
n
79
ALA
78
B
LEU
79
n
80
LEU
79
B
ASP
80
n
81
ASP
80
B
SER
81
n
82
SER
81
B
HIS
82
n
83
HIS
82
B
n
84
83
B
n
85
84
B
n
86
85
B
n
87
86
B
n
88
87
B
n
89
88
B
n
90
89
B
n
91
90
B
n
92
91
B
n
93
92
B
n
94
93
B
n
95
94
B
n
96
95
B
n
97
96
B
author_and_software_defined_assembly
PISA
2
dimeric
2350
-30.1
7350
A
LYS
47
A
O
LYS
48
1_555
A
K
1089
C
K
K
1_555
A
VAL
50
A
O
VAL
51
1_555
85.1
A
LYS
47
A
O
LYS
48
1_555
A
K
1089
C
K
K
1_555
A
ILE
53
A
O
ILE
54
1_555
98.2
A
VAL
50
A
O
VAL
51
1_555
A
K
1089
C
K
K
1_555
A
ILE
53
A
O
ILE
54
1_555
88.7
A
LYS
47
A
O
LYS
48
1_555
A
K
1089
C
K
K
1_555
A
GLN
55
A
OE1
GLN
56
1_555
85.7
A
VAL
50
A
O
VAL
51
1_555
A
K
1089
C
K
K
1_555
A
GLN
55
A
OE1
GLN
56
1_555
161.2
A
ILE
53
A
O
ILE
54
1_555
A
K
1089
C
K
K
1_555
A
GLN
55
A
OE1
GLN
56
1_555
108.9
A
LYS
47
A
O
LYS
48
1_555
A
K
1089
C
K
K
1_555
A
HOH
2001
F
O
HOH
1_555
105.7
A
VAL
50
A
O
VAL
51
1_555
A
K
1089
C
K
K
1_555
A
HOH
2001
F
O
HOH
1_555
82.4
A
ILE
53
A
O
ILE
54
1_555
A
K
1089
C
K
K
1_555
A
HOH
2001
F
O
HOH
1_555
153.6
A
GLN
55
A
OE1
GLN
56
1_555
A
K
1089
C
K
K
1_555
A
HOH
2001
F
O
HOH
1_555
84.3
B
LYS
47
B
O
LYS
48
1_555
B
K
1083
E
K
K
1_555
B
VAL
50
B
O
VAL
51
1_555
82.6
B
LYS
47
B
O
LYS
48
1_555
B
K
1083
E
K
K
1_555
B
ILE
53
B
O
ILE
54
1_555
87.6
B
VAL
50
B
O
VAL
51
1_555
B
K
1083
E
K
K
1_555
B
ILE
53
B
O
ILE
54
1_555
91.5
B
LYS
47
B
O
LYS
48
1_555
B
K
1083
E
K
K
1_555
B
GLN
55
B
OE1
GLN
56
1_555
78.5
B
VAL
50
B
O
VAL
51
1_555
B
K
1083
E
K
K
1_555
B
GLN
55
B
OE1
GLN
56
1_555
152.1
B
ILE
53
B
O
ILE
54
1_555
B
K
1083
E
K
K
1_555
B
GLN
55
B
OE1
GLN
56
1_555
107.9
B
LYS
47
B
O
LYS
48
1_555
B
K
1083
E
K
K
1_555
B
HOH
2007
G
O
HOH
1_555
141.4
B
VAL
50
B
O
VAL
51
1_555
B
K
1083
E
K
K
1_555
B
HOH
2007
G
O
HOH
1_555
118.3
B
ILE
53
B
O
ILE
54
1_555
B
K
1083
E
K
K
1_555
B
HOH
2007
G
O
HOH
1_555
61.6
B
GLN
55
B
OE1
GLN
56
1_555
B
K
1083
E
K
K
1_555
B
HOH
2007
G
O
HOH
1_555
89.0
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
1
A
GLY
0
A
GLY
1
1
Y
1
A
MET
1
A
MET
2
1
Y
1
A
LYS
2
A
LYS
3
1
Y
1
A
ALA
3
A
ALA
4
1
Y
1
A
PHE
4
A
PHE
5
1
Y
1
A
SER
5
A
SER
6
1
Y
1
A
PRO
6
A
PRO
7
1
Y
1
A
VAL
7
A
VAL
8
1
Y
1
A
ARG
8
A
ARG
9
1
Y
1
A
SER
9
A
SER
10
1
Y
1
A
VAL
10
A
VAL
11
1
Y
1
A
ARG
11
A
ARG
12
1
Y
1
A
LYS
12
A
LYS
13
1
Y
1
A
ASN
13
A
ASN
14
1
Y
1
A
SER
14
A
SER
15
1
Y
1
A
LEU
15
A
LEU
16
1
Y
1
A
SER
16
A
SER
17
1
Y
1
A
ASP
17
A
ASP
18
1
Y
1
A
HIS
18
A
HIS
19
1
Y
1
A
SER
19
A
SER
20
1
Y
1
A
LEU
20
A
LEU
21
1
Y
1
A
GLY
21
A
GLY
22
1
Y
1
A
ILE
22
A
ILE
23
1
Y
1
A
SER
23
A
SER
24
1
Y
1
A
ARG
24
A
ARG
25
1
Y
1
A
SER
25
A
SER
26
1
Y
1
A
LYS
26
A
LYS
27
1
Y
1
A
THR
27
A
THR
28
1
Y
1
A
PRO
28
A
PRO
29
1
Y
1
A
VAL
29
A
VAL
30
1
Y
1
A
VAL
89
A
VAL
90
1
Y
1
A
GLN
90
A
GLN
91
1
Y
1
A
SER
91
A
SER
92
1
Y
1
A
GLY
92
A
GLY
93
1
Y
1
A
ASP
93
A
ASP
94
1
Y
1
A
ILE
94
A
ILE
95
1
Y
1
A
ALA
95
A
ALA
96
1
Y
1
A
SER
96
A
SER
97
1
Y
1
B
GLY
0
B
GLY
1
1
Y
1
B
MET
1
B
MET
2
1
Y
1
B
LYS
2
B
LYS
3
1
Y
1
B
ALA
3
B
ALA
4
1
Y
1
B
PHE
4
B
PHE
5
1
Y
1
B
SER
5
B
SER
6
1
Y
1
B
PRO
6
B
PRO
7
1
Y
1
B
VAL
7
B
VAL
8
1
Y
1
B
ARG
8
B
ARG
9
1
Y
1
B
SER
9
B
SER
10
1
Y
1
B
VAL
10
B
VAL
11
1
Y
1
B
ARG
11
B
ARG
12
1
Y
1
B
LYS
12
B
LYS
13
1
Y
1
B
ASN
13
B
ASN
14
1
Y
1
B
SER
14
B
SER
15
1
Y
1
B
LEU
15
B
LEU
16
1
Y
1
B
SER
16
B
SER
17
1
Y
1
B
ASP
17
B
ASP
18
1
Y
1
B
HIS
18
B
HIS
19
1
Y
1
B
SER
19
B
SER
20
1
Y
1
B
LEU
20
B
LEU
21
1
Y
1
B
GLY
21
B
GLY
22
1
Y
1
B
ILE
22
B
ILE
23
1
Y
1
B
SER
23
B
SER
24
1
Y
1
B
ARG
24
B
ARG
25
1
Y
1
B
SER
25
B
SER
26
1
Y
1
B
LYS
26
B
LYS
27
1
Y
1
B
THR
27
B
THR
28
1
Y
1
B
PRO
28
B
PRO
29
1
Y
1
B
VAL
29
B
VAL
30
1
Y
1
B
ASP
30
B
ASP
31
1
Y
1
B
ASP
31
B
ASP
32
1
Y
1
B
PRO
32
B
PRO
33
1
Y
1
B
MET
33
B
MET
34
1
Y
1
B
SER
34
B
SER
35
1
Y
1
B
LEU
83
B
LEU
84
1
Y
1
B
LYS
84
B
LYS
85
1
Y
1
B
PRO
85
B
PRO
86
1
Y
1
B
SER
86
B
SER
87
1
Y
1
B
PHE
87
B
PHE
88
1
Y
1
B
LEU
88
B
LEU
89
1
Y
1
B
VAL
89
B
VAL
90
1
Y
1
B
GLN
90
B
GLN
91
1
Y
1
B
SER
91
B
SER
92
1
Y
1
B
GLY
92
B
GLY
93
1
Y
1
B
ASP
93
B
ASP
94
1
Y
1
B
ILE
94
B
ILE
95
1
Y
1
B
ALA
95
B
ALA
96
1
Y
1
B
SER
96
B
SER
97
1
Y
1
A
ASN
56
-85.06
39.03
1
A
SER
81
-116.19
-72.41
54.4
RESIDUES 1-29 ARE MISSING IN CHAIN A. RESIDUES 1-34 ARE MISSING IN CHAIN B.
0.2497
0.2246
0.2271
2.103
44.706
987
10026
9.8
95.20
0.23
1
0.65
MOLECULAR REPLACEMENT
27.31
0.90
1.11
INTERNAL SELENOMETHIONINE-SUBSTITUTED ID2 STRUCTURE AT 3.0A
ML
FLAT BULK SOLVENT MODEL
0
0
2.103
44.706
24
900
6
0
870
0.007
888
1.071
1198
13.029
346
0.059
141
0.004
149
0.3049
0.2513
2.2139
129
1147
88.00
0.3124
0.2351
2.3526
136
1228
91.00
0.3081
0.2357
2.5343
133
1229
94.00
0.2775
0.2585
2.7893
140
1300
97.00
0.3268
0.2613
3.1928
148
1335
98.00
0.2479
0.2096
4.0222
148
1356
100.00
0.1968
0.2091
44.7160
153
1444
99.00
41.98
2.10
50.00
4AYA
10569
0.0
0.06
1
40.60
11.9
100.0
0.42
2.10
2.18
4.20
1
10.2
100.0
refinement
PHENIX
(PHENIX.REFINE)
data reduction
HKL-2000
data scaling
SCALEPACK
phasing
PHENIX
Crystal structure of ID2 HLH homodimer at 2.1A resolution
1
N
N
1
N
N
2
N
N
3
N
N
2
N
N
4
N
N
4
N
N
A
ASP
31
A
ASP
32
HELX_P
A
VAL
50
A
VAL
51
1
1
20
A
SER
60
A
SER
61
HELX_P
A
SER
81
A
SER
82
1
2
22
B
ASN
38
B
ASN
39
HELX_P
B
VAL
50
B
VAL
51
1
3
13
B
SER
60
B
SER
61
HELX_P
B
SER
81
B
SER
82
1
4
22
metalc
2.703
A
LYS
47
A
O
LYS
48
1_555
A
K
1089
C
K
K
1_555
metalc
2.680
A
VAL
50
A
O
VAL
51
1_555
A
K
1089
C
K
K
1_555
metalc
2.631
A
ILE
53
A
O
ILE
54
1_555
A
K
1089
C
K
K
1_555
metalc
3.029
A
GLN
55
A
OE1
GLN
56
1_555
A
K
1089
C
K
K
1_555
metalc
3.060
A
K
1089
C
K
K
1_555
A
HOH
2001
F
O
HOH
1_555
metalc
2.602
B
LYS
47
B
O
LYS
48
1_555
B
K
1083
E
K
K
1_555
metalc
2.604
B
VAL
50
B
O
VAL
51
1_555
B
K
1083
E
K
K
1_555
metalc
2.703
B
ILE
53
B
O
ILE
54
1_555
B
K
1083
E
K
K
1_555
metalc
2.884
B
GLN
55
B
OE1
GLN
56
1_555
B
K
1083
E
K
K
1_555
metalc
2.837
B
K
1083
E
K
K
1_555
B
HOH
2007
G
O
HOH
1_555
CELL CYCLE
CELL CYCLE
ID2_HUMAN
UNP
1
Q02363
1
82
4AYA
1
82
Q02363
A
1
2
83
1
82
4AYA
1
82
Q02363
B
1
2
83
1
cloning artifact
GLY
0
4AYA
A
Q02363
UNP
1
1
SEE REMARK 999
LEU
83
4AYA
A
Q02363
UNP
84
1
SEE REMARK 999
LYS
84
4AYA
A
Q02363
UNP
85
1
SEE REMARK 999
PRO
85
4AYA
A
Q02363
UNP
86
1
SEE REMARK 999
SER
86
4AYA
A
Q02363
UNP
87
1
SEE REMARK 999
PHE
87
4AYA
A
Q02363
UNP
88
1
SEE REMARK 999
LEU
88
4AYA
A
Q02363
UNP
89
1
SEE REMARK 999
VAL
89
4AYA
A
Q02363
UNP
90
1
SEE REMARK 999
GLN
90
4AYA
A
Q02363
UNP
91
1
SEE REMARK 999
SER
91
4AYA
A
Q02363
UNP
92
1
SEE REMARK 999
GLY
92
4AYA
A
Q02363
UNP
93
1
SEE REMARK 999
ASP
93
4AYA
A
Q02363
UNP
94
1
SEE REMARK 999
ILE
94
4AYA
A
Q02363
UNP
95
1
SEE REMARK 999
ALA
95
4AYA
A
Q02363
UNP
96
1
SEE REMARK 999
SER
96
4AYA
A
Q02363
UNP
97
2
cloning artifact
GLY
0
4AYA
B
Q02363
UNP
1
2
SEE REMARK 999
LEU
83
4AYA
B
Q02363
UNP
84
2
SEE REMARK 999
LYS
84
4AYA
B
Q02363
UNP
85
2
SEE REMARK 999
PRO
85
4AYA
B
Q02363
UNP
86
2
SEE REMARK 999
SER
86
4AYA
B
Q02363
UNP
87
2
SEE REMARK 999
PHE
87
4AYA
B
Q02363
UNP
88
2
SEE REMARK 999
LEU
88
4AYA
B
Q02363
UNP
89
2
SEE REMARK 999
VAL
89
4AYA
B
Q02363
UNP
90
2
SEE REMARK 999
GLN
90
4AYA
B
Q02363
UNP
91
2
SEE REMARK 999
SER
91
4AYA
B
Q02363
UNP
92
2
SEE REMARK 999
GLY
92
4AYA
B
Q02363
UNP
93
2
SEE REMARK 999
ASP
93
4AYA
B
Q02363
UNP
94
2
SEE REMARK 999
ILE
94
4AYA
B
Q02363
UNP
95
2
SEE REMARK 999
ALA
95
4AYA
B
Q02363
UNP
96
2
SEE REMARK 999
SER
96
4AYA
B
Q02363
UNP
97
BINDING SITE FOR RESIDUE K A 1089
A
K
1089
Software
6
BINDING SITE FOR RESIDUE ACT A 1090
A
ACT
1090
Software
4
BINDING SITE FOR RESIDUE K B 1083
B
K
1083
Software
6
A
LYS
47
A
LYS
48
6
1_555
A
VAL
50
A
VAL
51
6
1_555
A
PRO
51
A
PRO
52
6
1_555
A
ILE
53
A
ILE
54
6
1_555
A
GLN
55
A
GLN
56
6
1_555
A
HOH
2001
F
HOH
6
1_555
A
MET
39
A
MET
40
4
1_555
A
LYS
61
A
LYS
62
4
1_555
B
TYR
43
B
TYR
44
4
1_555
B
LYS
61
B
LYS
62
4
1_555
B
LYS
47
B
LYS
48
6
1_555
B
VAL
50
B
VAL
51
6
1_555
B
PRO
51
B
PRO
52
6
1_555
B
ILE
53
B
ILE
54
6
1_555
B
GLN
55
B
GLN
56
6
1_555
B
HOH
2007
G
HOH
6
1_555
154
P 32 2 1