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
C5 H10 N2 O3
146.144
y
GLUTAMINE
L-peptide linking
C5 H9 N O4
147.129
y
GLUTAMIC ACID
L-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
H O -1
17.007
HYDROXIDE ION
non-polymer
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
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
NE
J.BIOMOL.NMR
JBNME9
0800
0925-2738
14
141
148
10.1023/A:1008391823293
Dilute Spin-Exchange Assignment of Solid-State NMR Spectra of Oriented Proteins: Acetylcholine M2 in Bilayers
1999
10.2210/pdb1eq8/pdb
pdb_00001eq8
1.000000
0.000000
0.000000
0.000000
1.000000
0.000000
0.000000
0.000000
1.000000
0.00000
0.00000
0.00000
2522.013
ACETYLCHOLINE RECEPTOR PROTEIN
M2 SEGMENT
5
man
polymer
17.007
HYDROXIDE ION
1
syn
non-polymer
ACHR M2
no
no
EKMSTAISVLLAQAVFLLLTSQR
EKMSTAISVLLAQAVFLLLTSQR
A,B,C,D,E
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
Pacific electric ray
Torpedo
Escherichia
Escherichia coli
sample
NEURON
POST-SYNAPTIC MEMBRANE
7787
BRAIN
Torpedo californica
511693
Escherichia coli BL21
BL21
PMAL
database_2
pdbx_nmr_software
pdbx_struct_assembly
pdbx_struct_oper_list
struct_conn
struct_site
repository
Initial release
Version format compliance
Version format compliance
Data collection
Database references
Derived calculations
1
0
2000-04-26
1
1
2008-04-27
1
2
2011-07-13
1
3
2022-02-16
_database_2.pdbx_DOI
_database_2.pdbx_database_accession
_pdbx_nmr_software.name
_struct_conn.pdbx_leaving_atom_flag
_struct_site.pdbx_auth_asym_id
_struct_site.pdbx_auth_comp_id
_struct_site.pdbx_auth_seq_id
SOLUTION NMR COORDINATES OF THE MONOMERIC ACHR M2 HELIX
SOLID-STATE NMR COORDINATES OF THE MONOMERIC ACHR M2 HELIX IN THE MEMBRANE
RCSB
Y
RCSB
2000-04-03
REL
OH
HYDROXIDE ION
The orientation of each monomer in the pentameric bundle was obtained from the combination of the solution NMR (PDB file 1a11) and solid-state NMR (PDB file 1cek) structures
structures with favorable non-bond energy
30
1
HSQC; HNCA; HNCOCA; 3D 15N- and 13C-edited NOESY; 3D 15N- and 13C-edited TOCSY; 3D HNHA
1D CPMOIST; 2D 1H/1H-15N PISEMA; 2D 1H/15N HETCOR;
5.5
ambient
303
K
5.5
ambient
298
K
The backbone coordinates obtained from solution NMR were superimposed on the coordinates obtained from solid-state NMR to fix the helix orientation and rotation in the membrane. The pentameric array was then optimized using molecular dynamics. Pore contours were calculated with the program HOLE.
X-PLOR 3.1, distance geometry, simulated annealing, molecular dynamics, FISI, FINGERPRINT, HOLE
minimized average structure
1mM M2 U-15N; 350mM DPC; pH5.5;
90% H2O/10% D2O
20mg M2 U-15N; 40mg DMPC;
DMPC bilayers in H2O;
Brunger
refinement
X-PLOR
3.01
Marassi
structure solution
FISI
1.01
Smart, Goodfellow, Wallace
structure solution
HOLE
data analysis
Felix
95
750
Bruker
DMX
600
Bruker
DMX
400
Chemagnetics
CMX
OH
24
2
OH
OH
24
E
GLU
1
n
1
GLU
1
A
LYS
2
n
2
LYS
2
A
MET
3
n
3
MET
3
A
SER
4
n
4
SER
4
A
THR
5
n
5
THR
5
A
ALA
6
n
6
ALA
6
A
ILE
7
n
7
ILE
7
A
SER
8
n
8
SER
8
A
VAL
9
n
9
VAL
9
A
LEU
10
n
10
LEU
10
A
LEU
11
n
11
LEU
11
A
ALA
12
n
12
ALA
12
A
GLN
13
n
13
GLN
13
A
ALA
14
n
14
ALA
14
A
VAL
15
n
15
VAL
15
A
PHE
16
n
16
PHE
16
A
LEU
17
n
17
LEU
17
A
LEU
18
n
18
LEU
18
A
LEU
19
n
19
LEU
19
A
THR
20
n
20
THR
20
A
SER
21
n
21
SER
21
A
GLN
22
n
22
GLN
22
A
ARG
23
n
23
ARG
23
A
GLU
1
n
1
GLU
1
B
LYS
2
n
2
LYS
2
B
MET
3
n
3
MET
3
B
SER
4
n
4
SER
4
B
THR
5
n
5
THR
5
B
ALA
6
n
6
ALA
6
B
ILE
7
n
7
ILE
7
B
SER
8
n
8
SER
8
B
VAL
9
n
9
VAL
9
B
LEU
10
n
10
LEU
10
B
LEU
11
n
11
LEU
11
B
ALA
12
n
12
ALA
12
B
GLN
13
n
13
GLN
13
B
ALA
14
n
14
ALA
14
B
VAL
15
n
15
VAL
15
B
PHE
16
n
16
PHE
16
B
LEU
17
n
17
LEU
17
B
LEU
18
n
18
LEU
18
B
LEU
19
n
19
LEU
19
B
THR
20
n
20
THR
20
B
SER
21
n
21
SER
21
B
GLN
22
n
22
GLN
22
B
ARG
23
n
23
ARG
23
B
GLU
1
n
1
GLU
1
C
LYS
2
n
2
LYS
2
C
MET
3
n
3
MET
3
C
SER
4
n
4
SER
4
C
THR
5
n
5
THR
5
C
ALA
6
n
6
ALA
6
C
ILE
7
n
7
ILE
7
C
SER
8
n
8
SER
8
C
VAL
9
n
9
VAL
9
C
LEU
10
n
10
LEU
10
C
LEU
11
n
11
LEU
11
C
ALA
12
n
12
ALA
12
C
GLN
13
n
13
GLN
13
C
ALA
14
n
14
ALA
14
C
VAL
15
n
15
VAL
15
C
PHE
16
n
16
PHE
16
C
LEU
17
n
17
LEU
17
C
LEU
18
n
18
LEU
18
C
LEU
19
n
19
LEU
19
C
THR
20
n
20
THR
20
C
SER
21
n
21
SER
21
C
GLN
22
n
22
GLN
22
C
ARG
23
n
23
ARG
23
C
GLU
1
n
1
GLU
1
D
LYS
2
n
2
LYS
2
D
MET
3
n
3
MET
3
D
SER
4
n
4
SER
4
D
THR
5
n
5
THR
5
D
ALA
6
n
6
ALA
6
D
ILE
7
n
7
ILE
7
D
SER
8
n
8
SER
8
D
VAL
9
n
9
VAL
9
D
LEU
10
n
10
LEU
10
D
LEU
11
n
11
LEU
11
D
ALA
12
n
12
ALA
12
D
GLN
13
n
13
GLN
13
D
ALA
14
n
14
ALA
14
D
VAL
15
n
15
VAL
15
D
PHE
16
n
16
PHE
16
D
LEU
17
n
17
LEU
17
D
LEU
18
n
18
LEU
18
D
LEU
19
n
19
LEU
19
D
THR
20
n
20
THR
20
D
SER
21
n
21
SER
21
D
GLN
22
n
22
GLN
22
D
ARG
23
n
23
ARG
23
D
GLU
1
n
1
GLU
1
E
LYS
2
n
2
LYS
2
E
MET
3
n
3
MET
3
E
SER
4
n
4
SER
4
E
THR
5
n
5
THR
5
E
ALA
6
n
6
ALA
6
E
ILE
7
n
7
ILE
7
E
SER
8
n
8
SER
8
E
VAL
9
n
9
VAL
9
E
LEU
10
n
10
LEU
10
E
LEU
11
n
11
LEU
11
E
ALA
12
n
12
ALA
12
E
GLN
13
n
13
GLN
13
E
ALA
14
n
14
ALA
14
E
VAL
15
n
15
VAL
15
E
PHE
16
n
16
PHE
16
E
LEU
17
n
17
LEU
17
E
LEU
18
n
18
LEU
18
E
LEU
19
n
19
LEU
19
E
THR
20
n
20
THR
20
E
SER
21
n
21
SER
21
E
GLN
22
n
22
GLN
22
E
ARG
23
n
23
ARG
23
E
author_defined_assembly
5
pentameric
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
3.82
0.50
120.30
124.12
A
A
A
NE
CZ
NH1
ARG
ARG
ARG
23
23
23
N
1
3.84
0.50
120.30
124.14
B
B
B
NE
CZ
NH1
ARG
ARG
ARG
23
23
23
N
1
3.81
0.50
120.30
124.11
C
C
C
NE
CZ
NH1
ARG
ARG
ARG
23
23
23
N
1
3.80
0.50
120.30
124.10
D
D
D
NE
CZ
NH1
ARG
ARG
ARG
23
23
23
N
1
3.80
0.50
120.30
124.10
E
E
E
NE
CZ
NH1
ARG
ARG
ARG
23
23
23
N
1
E
E
C
O
ARG
ARG
23
23
0.150
0.019
1.229
1.379
N
THREE-DIMENSIONAL STRUCTURE OF THE PENTAMERIC HELICAL BUNDLE OF THE ACETYLCHOLINE RECEPTOR M2 TRANSMEMBRANE SEGMENT
1
N
N
1
N
N
1
N
N
1
N
N
1
N
N
2
N
N
A
GLU
1
A
GLU
1
HELX_P
A
ARG
23
A
ARG
23
1
1
23
B
GLU
1
B
GLU
1
HELX_P
B
ARG
23
B
ARG
23
1
2
23
C
GLU
1
C
GLU
1
HELX_P
C
ARG
23
C
ARG
23
1
3
23
D
GLU
1
D
GLU
1
HELX_P
D
ARG
23
D
ARG
23
1
4
23
E
GLU
1
E
GLU
1
HELX_P
E
ARG
23
E
ARG
23
1
5
23
covale
1.230
one
E
ARG
23
E
C
ARG
23
1_555
E
OH
24
F
O
OH
1_555
SIGNALING PROTEIN
NEUROTRANSMITTER RECEPTOR, M2, LIPID BILAYERS, ION-CHANNEL, HELICAL BUNDLE, PENTAMERIC BUNDLE, SIGNALING PROTEIN
ACHD_TORCA
UNP
1
P02718
276
298
1EQ8
1
23
P02718
A
1
1
23
276
298
1EQ8
1
23
P02718
B
1
1
23
276
298
1EQ8
1
23
P02718
C
1
1
23
276
298
1EQ8
1
23
P02718
D
1
1
23
276
298
1EQ8
1
23
P02718
E
1
1
23
BINDING SITE FOR RESIDUE OH E 24
E
OH
24
Software
3
E
LEU
19
E
LEU
19
3
1_555
E
THR
20
E
THR
20
3
1_555
E
ARG
23
E
ARG
23
3
1_555
1
P 1