1I9B	Ligand Binding Protein	date	Mar 18, 2001
title	X-Ray Structure Of Acetylcholine Binding Protein (Achbp)
authors	K.Brejc, W.J.Van Dijk, R.Klaassen, M.Schuurmans, J.Van Der Oost, T.K.Sixma
compound		source
Molecule: Acetylcholine Binding Protein Chain: A, B, C, D, E Synonym: Achbp Engineered: Yes Mutation: Yes		Organism_scientific: Lymnaea Stagnalis Organism_common: Great Pond Snail Organism_taxid: 6523 Expression_system: Pichia Pastoris Expression_system_taxid: 4922 Expression_system_strain: Gs 115 Expression_system_vector_type: Plasmid Expression_system_plasmid: Ppic9
symmetry	Space Group: P 42 21 2	R_factor 0.260 R_Free 0.297
crystal cell	length a length b length c angle alpha angle beta angle gamma 141.660 141.660 120.870 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.70 Å
ligand	CA, EPE	enzyme
related structures	by homologous chain: 1UV6
Gene Ontology	Chain Function Process Component A, D, C, E, B
Primary reference	Crystal structure of an ACh-binding protein reveals the ligand-binding domain of nicotinic receptors., Brejc K, van Dijk WJ, Klaassen RV, Schuurmans M, van Der Oost J, Smit AB, Sixma TK, Nature 2001 May 17;411(6835):269-76. PMID:11357122

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (176 Kb) [Save to disk] Biological Unit Coordinates (1i9b.pdb1.gz) 169 Kb Biological Unit Coordinates (1i9b.pdb2.gz) 336 Kb LPC: Ligand-Protein Contacts for 1I9B CSU: Contacts of Structural Units for 1I9B Likely Quarternary Molecular Structure file(s) for 1I9B Retrieve 1I9B in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1I9B from S2C, [Save to disk]

View 1I9B in 3D

Proteopedia, because life has more than 2D. On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure. On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.

Visual 3D analysis of 1I9B

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1I9B, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1i9ba_, region A [Jmol] [rasmolscript] [script source]     - Domain d1i9bb_, region B [Jmol] [rasmolscript] [script source]     - Domain d1i9bc_, region C [Jmol] [rasmolscript] [script source]     - Domain d1i9bd_, region D [Jmol] [rasmolscript] [script source]     - Domain d1i9be_, region E [Jmol] [rasmolscript] [script source] Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH Summaries and structural analyses of PDB data files from PDBSum Identification of Protein Pockets & Cavities at CASTp

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1i9b_E] [1i9b_C] [1i9b_D] [1i9b] [1i9b_A] [1i9b_B] SWISS-PROT database: [P58154] Domain organization of [ACHP_LYMST] by SWISSPFAM

Other resources with information on 1I9B

Community annotation for 1I9B at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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