2CKM	Hydrolase	date	Apr 20, 2006
title	Torpedo Californica Acetylcholinesterase Complexed With Alky Linked Bis-Tacrine Dimer (7 Carbon Linker)
authors	B.Brumshtein, E.H.Rydberg, H.M.Greenblatt, D.M.Wong, D.Shaya, L.D.Williams, P.R.Carlier, Y.P.Pang, I.Silman, J.L.Sussman
compound		source
Molecule: Acetylcholinesterase Chain: A Synonym: Ache Ec: 3.1.1.7		Organism_scientific: Torpedo Californica Organism_common: Pacific Electric Ray Organism_taxid: 7787 Variant: G2 Form Organ: Electric Organ Tissue: Electroplaque
symmetry	Space Group: P 31 2 1	R_factor 0.211 R_Free 0.249
crystal cell	length a length b length c angle alpha angle beta angle gamma 111.884 111.884 137.413 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	2.15 Å
ligand	AA7, NAG	enzyme	Hydrolase E.C.3.1.1.7 BRENDA
Gene Ontology	Chain Function Process Component A acetylcholine catabolic proc...
Primary reference	Complexes of alkylene-linked tacrine dimers with Torpedo californica acetylcholinesterase: Binding of Bis5-tacrine produces a dramatic rearrangement in the active-site gorge., Rydberg EH, Brumshtein B, Greenblatt HM, Wong DM, Shaya D, Williams LD, Carlier PR, Pang YP, Silman I, Sussman JL, J Med Chem. 2006 Sep 7;49(18):5491-500. PMID:16942022

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (95 Kb) [Save to disk] Biological Unit Coordinates (2ckm.pdb1.gz) 173 Kb LPC: Ligand-Protein Contacts for 2CKM CSU: Contacts of Structural Units for 2CKM Likely Quarternary Molecular Structure file(s) for 2CKM Structure Factors (421 Kb) Retrieve 2CKM in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2CKM from S2C, [Save to disk] Re-refined 2ckm structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2CKM 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 2CKM

Ramachandran plot from PDBSum

Structure-derived information

Electron Density related parameters from EDS Electron Density Server, at Upsala Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 2CKM, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2ckm_A] [2ckm] SWISS-PROT database: [P04058] Domain organization of [ACES_TORCA] by SWISSPFAM

Other resources with information on 2CKM

Community annotation for 2CKM at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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