1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
1.000000
0.00000
0.00000
0.00000
Marassi, F.M.
Gesell, J.J.
Kim, Y.
Valente, A.P.
Oblatt-Montal, M.
Montal, M.
Opella, S.J.
http://mmcif.pdb.org/dictionaries/ascii/mmcif_pdbx.dic
1
90.00
90.00
90.00
1.000
1.000
1.000
C3 H7 N O2
89.093
y
ALANINE
L-peptide linking
C6 H15 N4 O2 1
175.209
y
ARGININE
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 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
C3 H7 N O3
105.093
y
SERINE
L-peptide linking
C4 H9 N O3
119.119
y
THREONINE
L-peptide linking
C5 H11 N O2
117.146
y
VALINE
L-peptide linking
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
R
C
N
43
N
C
N
44
N
O
N
45
N
C
N
46
N
S
N
47
N
O
N
48
N
H
N
49
N
H
N
50
N
H
N
51
N
H
N
52
N
H
N
53
N
H
N
54
N
H
N
55
N
N
N
56
S
C
N
57
N
C
N
58
N
O
N
59
N
C
N
60
N
C
N
61
N
C
N
62
N
O
N
63
N
N
N
64
N
O
N
65
N
H
N
66
N
H
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
H
N
75
N
N
N
76
S
C
N
77
N
C
N
78
N
O
N
79
N
C
N
80
N
C
N
81
N
C
N
82
N
O
N
83
N
O
N
84
N
O
N
85
N
H
N
86
N
H
N
87
N
H
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
N
N
95
N
C
N
96
N
C
N
97
N
O
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
N
N
105
S
C
N
106
N
C
N
107
N
O
N
108
S
C
N
109
N
C
N
110
N
C
N
111
N
C
N
112
N
O
N
113
N
H
N
114
N
H
N
115
N
H
N
116
N
H
N
117
N
H
N
118
N
H
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
N
N
127
S
C
N
128
N
C
N
129
N
O
N
130
N
C
N
131
N
C
N
132
N
C
N
133
N
C
N
134
N
O
N
135
N
H
N
136
N
H
N
137
N
H
N
138
N
H
N
139
N
H
N
140
N
H
N
141
N
H
N
142
N
H
N
143
N
H
N
144
N
H
N
145
N
H
N
146
N
H
N
147
N
H
N
148
N
N
N
149
S
C
N
150
N
C
N
151
N
O
N
152
N
C
N
153
N
C
N
154
N
C
N
155
N
C
N
156
N
N
N
157
N
O
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
H
N
166
N
H
N
167
N
H
N
168
N
H
N
169
N
H
N
170
N
H
N
171
N
H
N
172
N
H
N
173
N
N
N
174
S
C
N
175
N
C
N
176
N
O
N
177
N
C
N
178
N
C
N
179
N
S
N
180
N
C
N
181
N
O
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
H
N
191
N
H
N
192
N
H
N
193
N
N
N
194
S
C
N
195
N
C
N
196
N
O
N
197
N
C
Y
198
N
C
Y
199
N
C
Y
200
N
C
Y
201
N
C
Y
202
N
C
Y
203
N
C
N
204
N
O
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
H
N
214
N
H
N
215
N
H
N
216
N
N
N
217
S
C
N
218
N
C
N
219
N
O
N
220
N
C
N
221
N
O
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
N
N
231
S
C
N
232
N
C
N
233
N
O
N
234
R
C
N
235
N
O
N
236
N
C
N
237
N
O
N
238
N
H
N
239
N
H
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
N
N
248
S
C
N
249
N
C
N
250
N
O
N
251
N
C
N
252
N
C
N
253
N
C
N
254
N
O
N
255
N
H
N
256
N
H
N
257
N
H
N
258
N
H
N
259
N
H
N
260
N
H
N
261
N
H
N
262
N
H
N
263
N
H
N
264
N
H
N
265
N
H
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
sing
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
doub
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
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
sing
N
77
N
doub
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
doub
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
sing
N
104
N
doub
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
sing
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
sing
N
123
N
sing
N
124
N
sing
N
125
N
doub
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
sing
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
sing
N
142
N
sing
N
143
N
sing
N
144
N
sing
N
145
N
sing
N
146
N
doub
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
sing
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
doub
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
sing
N
186
N
sing
N
187
N
sing
N
188
N
sing
N
189
N
doub
N
190
N
sing
N
191
N
sing
N
192
N
sing
N
193
N
sing
Y
194
N
doub
Y
195
N
sing
Y
196
N
sing
N
197
N
sing
Y
198
N
doub
N
199
N
sing
Y
200
N
doub
N
201
N
sing
Y
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
doub
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
doub
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
doub
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
sing
N
250
N
sing
N
251
N
sing
N
252
N
sing
US
Nat.Struct.Biol.
NSBIEW
2024
1072-8368
6
374
379
10.1038/7610
10201407
Structures of the M2 channel-lining segments from nicotinic acetylcholine and NMDA receptors by NMR spectroscopy.
1999
To be Published
0353
Dilute Spin-Exchange Assignment of Solid-State NMR Spectra of Oriented Proteins: Acetylcholine Receptor M2 Peptide in Bilayers
10.2210/pdb1cek/pdb
pdb_00001cek
1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
1.000000
0.00000
0.00000
0.00000
2666.143
PROTEIN (ACETYLCHOLINE RECEPTOR M2)
M2 DOMAIN
1
man
polymer
ACHR M2
no
no
GSEKMSTAISVLLAQAVFLLLTSQR
GSEKMSTAISVLLAQAVFLLLTSQR
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
Norway rat
Rattus
Escherichia
Escherichia coli
sample
NEURON
POST-SYNAPTIC MEMBRANE
10116
BRAIN
Rattus norvegicus
511693
Escherichia coli BL21
BL21
BACTERIAL
PGEX FUSION
database_2
pdbx_struct_assembly
pdbx_struct_oper_list
struct_ref_seq_dif
chem_comp_atom
chem_comp_bond
repository
Initial release
Version format compliance
Version format compliance
Database references
Derived calculations
Data collection
1
0
1999-03-11
1
1
2008-04-26
1
2
2011-07-13
1
3
2022-02-16
1
4
2023-12-27
_database_2.pdbx_DOI
_database_2.pdbx_database_accession
_struct_ref_seq_dif.details
BNL
Y
RCSB
1999-03-09
REL
LOWEST ENERGY. SAMPLE: DMPC BILAYERS ORIENTED ON GLASS SLIDES 15N CHEMICAL SHIFT, 1H CHEMICAL SHIFT AND 1H-15N DIPOLAR COUPLING FREQUENCIES WERE MEASURED FROM PISEMA AND
LOWEST ENERGY
24
1
15N SHIFT/1H-15N DIPOLAR COUPLING PISEMA
15N SHIFT/15N SHIFT HETCOR
1H SHIFT/15N SHIFT/1H-15N DIPOLAR COUPLING CORRELATION
6.0
295
K
ORIENTATIONAL CONSTRAINTS
DMPC
structure solution
FISI
structure solution
BACKTOR
structure solution
RESTRICT
refinement
RESTRICT
400
Home-built
HOMEBUILT
550
CHEMAGNETICS
CMX400
n
1
1
A
n
2
2
A
n
3
3
A
n
4
4
A
n
5
5
A
n
6
6
A
THR
7
n
7
THR
7
A
ALA
8
n
8
ALA
8
A
ILE
9
n
9
ILE
9
A
SER
10
n
10
SER
10
A
VAL
11
n
11
VAL
11
A
LEU
12
n
12
LEU
12
A
LEU
13
n
13
LEU
13
A
ALA
14
n
14
ALA
14
A
GLN
15
n
15
GLN
15
A
ALA
16
n
16
ALA
16
A
VAL
17
n
17
VAL
17
A
PHE
18
n
18
PHE
18
A
LEU
19
n
19
LEU
19
A
LEU
20
n
20
LEU
20
A
LEU
21
n
21
LEU
21
A
n
22
22
A
n
23
23
A
n
24
24
A
n
25
25
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
1
A
N
THR
7
A
N
THR
7
1
Y
1
A
CB
THR
7
A
CB
THR
7
1
Y
1
A
OG1
THR
7
A
OG1
THR
7
1
Y
1
A
CG2
THR
7
A
CG2
THR
7
1
Y
1
A
CB
ALA
8
A
CB
ALA
8
1
Y
1
A
CB
ILE
9
A
CB
ILE
9
1
Y
1
A
CG1
ILE
9
A
CG1
ILE
9
1
Y
1
A
CG2
ILE
9
A
CG2
ILE
9
1
Y
1
A
CD1
ILE
9
A
CD1
ILE
9
1
Y
1
A
CB
SER
10
A
CB
SER
10
1
Y
1
A
OG
SER
10
A
OG
SER
10
1
Y
1
A
CB
VAL
11
A
CB
VAL
11
1
Y
1
A
CG1
VAL
11
A
CG1
VAL
11
1
Y
1
A
CG2
VAL
11
A
CG2
VAL
11
1
Y
1
A
CB
LEU
12
A
CB
LEU
12
1
Y
1
A
CG
LEU
12
A
CG
LEU
12
1
Y
1
A
CD1
LEU
12
A
CD1
LEU
12
1
Y
1
A
CD2
LEU
12
A
CD2
LEU
12
1
Y
1
A
CB
LEU
13
A
CB
LEU
13
1
Y
1
A
CG
LEU
13
A
CG
LEU
13
1
Y
1
A
CD1
LEU
13
A
CD1
LEU
13
1
Y
1
A
CD2
LEU
13
A
CD2
LEU
13
1
Y
1
A
CB
ALA
14
A
CB
ALA
14
1
Y
1
A
CB
GLN
15
A
CB
GLN
15
1
Y
1
A
CG
GLN
15
A
CG
GLN
15
1
Y
1
A
CD
GLN
15
A
CD
GLN
15
1
Y
1
A
OE1
GLN
15
A
OE1
GLN
15
1
Y
1
A
NE2
GLN
15
A
NE2
GLN
15
1
Y
1
A
CB
ALA
16
A
CB
ALA
16
1
Y
1
A
CB
VAL
17
A
CB
VAL
17
1
Y
1
A
CG1
VAL
17
A
CG1
VAL
17
1
Y
1
A
CG2
VAL
17
A
CG2
VAL
17
1
Y
1
A
CB
PHE
18
A
CB
PHE
18
1
Y
1
A
CG
PHE
18
A
CG
PHE
18
1
Y
1
A
CD1
PHE
18
A
CD1
PHE
18
1
Y
1
A
CD2
PHE
18
A
CD2
PHE
18
1
Y
1
A
CE1
PHE
18
A
CE1
PHE
18
1
Y
1
A
CE2
PHE
18
A
CE2
PHE
18
1
Y
1
A
CZ
PHE
18
A
CZ
PHE
18
1
Y
1
A
CB
LEU
19
A
CB
LEU
19
1
Y
1
A
CG
LEU
19
A
CG
LEU
19
1
Y
1
A
CD1
LEU
19
A
CD1
LEU
19
1
Y
1
A
CD2
LEU
19
A
CD2
LEU
19
1
Y
1
A
CB
LEU
20
A
CB
LEU
20
1
Y
1
A
CG
LEU
20
A
CG
LEU
20
1
Y
1
A
CD1
LEU
20
A
CD1
LEU
20
1
Y
1
A
CD2
LEU
20
A
CD2
LEU
20
1
Y
1
A
C
LEU
21
A
C
LEU
21
1
Y
1
A
O
LEU
21
A
O
LEU
21
1
Y
1
A
CB
LEU
21
A
CB
LEU
21
1
Y
1
A
CG
LEU
21
A
CG
LEU
21
1
Y
1
A
CD1
LEU
21
A
CD1
LEU
21
1
Y
1
A
CD2
LEU
21
A
CD2
LEU
21
1
Y
1
A
GLY
1
A
GLY
1
1
Y
1
A
SER
2
A
SER
2
1
Y
1
A
GLU
3
A
GLU
3
1
Y
1
A
LYS
4
A
LYS
4
1
Y
1
A
MET
5
A
MET
5
1
Y
1
A
SER
6
A
SER
6
1
Y
1
A
THR
22
A
THR
22
1
Y
1
A
SER
23
A
SER
23
1
Y
1
A
GLN
24
A
GLN
24
1
Y
1
A
ARG
25
A
ARG
25
1
Y
THREE-DIMENSIONAL STRUCTURE OF THE MEMBRANE-EMBEDDED M2 CHANNEL-LINING SEGMENT FROM THE NICOTINIC ACETYLCHOLINE RECEPTOR BY SOLID-STATE NMR SPECTROSCOPY
1
N
N
A
THR
7
A
THR
7
HELX_P
SEE REMARK 650
A
LEU
21
A
LEU
21
1
1
15
ACETYLCHOLINE RECEPTOR
ACETYLCHOLINE RECEPTOR, M2, LIPID BILAYERS, ION-CHANNEL
ACHD_RAT
UNP
1
P25110
274
298
1CEK
1
25
P25110
A
1
1
25
1
CYS
cloning artifact
GLY
1
1CEK
A
P25110
UNP
274
1
1
GLY
cloning artifact
SER
2
1CEK
A
P25110
UNP
275
2
1
THR
conflict
MET
5
1CEK
A
P25110
UNP
278
5
1
VAL
conflict
THR
7
1CEK
A
P25110
UNP
280
7
1
SER
conflict
ALA
16
1CEK
A
P25110
UNP
289
16
1
ILE
conflict
THR
22
1CEK
A
P25110
UNP
295
22
1
LYS
conflict
GLN
24
1CEK
A
P25110
UNP
297
24
1
P 1