2I88	Membrane Protein	date	Sep 01, 2006
title	Crystal Structure Of The Channel-Forming Domain Of Colicin E
authors	P.Elkins, A.Bunker, W.A.Cramer, C.V.Stauffacher
compound		source
Molecule: Colicin-E1 Chain: A Fragment: C-Terminal Domain Engineered: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 562 Strain: Dm1187 Gene: Cea Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pskhy
symmetry	Space Group: I 4	R_factor 0.172 R_Free 0.284
crystal cell	length a length b length c angle alpha angle beta angle gamma 87.460 87.460 59.100 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.50 Å
Gene Ontology	Chain Function Process Component A
Primary reference	A mechanism for toxin insertion into membranes is suggested by the crystal structure of the channel-forming domain of colicin E1., Elkins P, Bunker A, Cramer WA, Stauffacher CV, Structure. 1997 Mar 15;5(3):443-58. PMID:9083117

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (32 Kb) [Save to disk] Biological Unit Coordinates (2i88.pdb1.gz) 28 Kb CSU: Contacts of Structural Units for 2I88 Likely Quarternary Molecular Structure file(s) for 2I88 Structure Factors (71 Kb) Retrieve 2I88 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2I88 from S2C, [Save to disk] Re-refined 2i88 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2I88 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 2I88

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 2I88, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2i88] [2i88_A] SWISS-PROT database: [P02978] Belongs to the channel-forming colicin (colicin) family according to TCDB. Domain organization of [CEA1_ECOLX] by SWISSPFAM

Other resources with information on 2I88

Community annotation for 2I88 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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