2XYS: Aplysia californica AChBP

Name: PDB 2XYS: Crystal structure of Aplysia californica AChBP in complex with strychnine
Published: 2011-03-23
License: https://creativecommons.org/publicdomain/zero/1.0/
Keywords: receptor

Crystal structure of Aplysia californica AChBP in complex with strychnine. Determined by X-ray diffraction at 1.91 Å resolution. Released 23 Mar 2011.

Method: X-ray diffraction
Resolution: 1.91 Å
Organism: APLYSIA CALIFORNICA
Chains: 5
Atoms: 9,639
Mol. weight: 125.45 kDa
Ligands: SY9
Released: 23 Mar 2011

Explore 2XYS in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

2XYS contains 25 α-helices and 77 β-strands across 5 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chain A: 5 helices, 15 β-strands

Element	Residues	Length	Sheet
α-helix	2-12	11
α-helix	16-18	3
β-strand	27-42	16	1
β-strand	47-64	18	1
α-helix	67-69	3
β-strand	75-79	5	1
α-helix	80-82	3
β-strand	88-90	3	2
β-strand	93	1	1
β-strand	98-99	2	1
β-strand	104-108	5	1
β-strand	110-115	6	1
β-strand	118-124	7	1
β-strand	136-144	9	2
β-strand	152-155	4	1
β-strand	160	1	2
α-helix	161	1
β-strand	162	1	1
β-strand	172-184	13	2
β-strand	193-204	12	2

Chain B: 6 helices, 17 β-strands

Element	Residues	Length	Sheet
α-helix	2-12	11
α-helix	16-18	3
β-strand	22	1	3
β-strand	25	1	3
β-strand	27-42	16	4
β-strand	47-64	18	4
α-helix	67-69	3
β-strand	75-79	5	4
α-helix	80-82	3
β-strand	88-90	3	5
β-strand	93	1	4
α-helix	96-97	2
β-strand	98-99	2	4
β-strand	104-108	5	4
β-strand	110-115	6	4
β-strand	118-124	7	4
β-strand	136-144	9	5
β-strand	152-156	5	4
β-strand	160	1	5
α-helix	161	1
β-strand	162	1	4
β-strand	172-184	13	5
β-strand	193-204	12	5

Chain C: 5 helices, 15 β-strands

Element	Residues	Length	Sheet
α-helix	2-8	7
α-helix	9-13	5
α-helix	16-18	3
β-strand	27-42	16	6
β-strand	47-64	18	6
α-helix	67-69	3
β-strand	75-79	5	6
α-helix	80-82	3
β-strand	88-90	3	7
β-strand	93	1	6
β-strand	98-99	2	6
β-strand	104-108	5	6
β-strand	110-115	6	6
β-strand	118-124	7	6
β-strand	136-144	9	7
β-strand	152-155	4	6
β-strand	160	1	7
β-strand	162	1	6
β-strand	172-184	13	7
β-strand	193-204	12	7

Chain D: 4 helices, 15 β-strands

Element	Residues	Length	Sheet
α-helix	2-12	11
α-helix	16-18	3
β-strand	27-42	16	8
β-strand	47-64	18	8
α-helix	67-69	3
β-strand	75-79	5	8
α-helix	80-82	3
β-strand	88-90	3	9
β-strand	93	1	8
β-strand	98-99	2	8
β-strand	104-108	5	8
β-strand	110-115	6	8
β-strand	118-124	7	8
β-strand	136-144	9	9
β-strand	152-155	4	8
β-strand	160	1	9
β-strand	162	1	8
β-strand	172-184	13	9
β-strand	193-204	12	9

Chain E: 5 helices, 15 β-strands

Element	Residues	Length	Sheet
α-helix	2-8	7
α-helix	9-13	5
α-helix	16-18	3
β-strand	27-42	16	10
β-strand	47-64	18	10
α-helix	67-70	4
β-strand	75-79	5	10
α-helix	80-82	3
β-strand	88-90	3	11
β-strand	93	1	10
β-strand	98-99	2	10
β-strand	104-108	5	10
β-strand	110-115	6	10
β-strand	118-124	7	10
β-strand	136-144	9	11
β-strand	152-155	4	10
β-strand	160	1	11
β-strand	162	1	10
β-strand	172-184	13	11
β-strand	193-204	12	11

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Soluble acetylcholine receptor	A, B, C, D, E	protein	217	APLYSIA CALIFORNICA	Q8WSF8 (AlphaFold model)

Sequence of entity 1 (A, B, C, D, E), FASTA

>2XYS_1 SOLUBLE ACETYLCHOLINE RECEPTOR (chains A, B, C, D, E)
QANLMRLKSDLFNRSPMYPGPTKDDPLTVTLGFTLQDIVKVDSSTNEVDLVYYEQQRWKL
NSLMWDPNEYGNITDFRTSAADIWTPDITAYSSTRPVQVLSPQIAVVTHDGSVMFIPAQR
LSFMCDPTGVDSEEGVTCAVKFGSWVYSGFEIDLKTDTDQVDLSSYYASSKYEILSATQT
RQVQHYSCCPEPYIDVNLVVKFRERRAGNGFFRNLFD

Ligands and cofactors

ID	Name	Formula	Copies
SY9	Strychnine	C21 H22 N2 O2	6

Primary citation

A Structural and Mutagenic Blueprint for Molecular Recognition of Strychnine and D-Tubocurarine by Different Cys-Loop Receptors. Brams, M., Pandya, A., Kuzmin, D. et al. PLoS Biol (2011) 9:01034. DOI 10.1371/JOURNAL.PBIO.1001034 · PubMed

Other PDB entries of the same protein (UniProt Q8WSF8 (AlphaFold model), which also has an AlphaFold model), best resolution first:

6T9R 1.72 Å, Aplysia californica AChBP in complex with a cytisine derivative
2WN9 1.75 Å, Crystal structure of Aplysia ACHBP in complex with 4-0H-DMXBA
2PGZ 1.76 Å, Crystal structure of Cocaine bound to an ACh-Binding Protein
2WNJ 1.8 Å, Crystal structure of aplysia achbp in complex with dmxba
8QTL 1.85 Å, Aplysia californica acetylcholine-binding protein in complex with Spiroimine (-)-4 S
2Y7Y 1.9 Å, Aplysia californica achbp in apo state
4XHE 1.9 Å, Crystal Structure of A-AChBP in complex with pinnatoxin A
4ZK4 1.9 Å, Crystal structure of a chimeric acetylcholine binding protein from Aplysia californica…
5TVC 1.93 Å, Crystal structure of a chimeric acetylcholine binding protein from Aplysia californica…
3C84 1.94 Å, Crystal structure of a complex of AChBP from aplysia californica and the neonicotinoid…
2YMD 1.96 Å, Crystal structure of a mutant binding protein (5HTBP-AChBP) in complex with serotonin…
4WV9 2.0 Å, Crystal structure of acetylcholine binding protein (AChBP) from Aplysia Californica in…

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