1E44	Ribonuclease	date	Jun 28, 2000
title	Ribonuclease Domain Of Colicin E3 In Complex With Its Immunity Protein
authors	S.Carr, D.Walker, R.James, C.Kleanthous, A.M.Hemmings
compound		source
Molecule: Colicin E3 Chain: B Fragment: Ribonuclease Domain Residues 456-551 Engineered: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 562 Expression_system: Escherichia Coli Expression_system_taxid: 511693 Expression_system_strain: Bl21 Expression_system_cellular_location: Cytoplasm Other_details: Co-Expressed With A His-Tagged Immunity Protein;
Molecule: Immunity Protein Chain: A Engineered: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 562 Expression_system: Escherichia Coli Expression_system_taxid: 469008 Expression_system_strain: Bl21(De3)
symmetry	Space Group: P 31 2 1	R_factor 0.192 R_Free 0.228
crystal cell	length a length b length c angle alpha angle beta angle gamma 93.700 93.700 76.170 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	2.4 Å
ligand	EDO	enzyme
related structures	by homologous chain: 3EIP
Gene Ontology	Chain Function Process Component A B
Primary reference	Inhibition of a ribosome-inactivating ribonuclease: the crystal structure of the cytotoxic domain of colicin E3 in complex with its immunity protein., Carr S, Walker D, James R, Kleanthous C, Hemmings AM, Structure Fold Des 2000 Sep 15;8(9):949-60. PMID:10986462

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (37 Kb) [Save to disk] Biological Unit Coordinates (1e44.pdb1.gz) 34 Kb LPC: Ligand-Protein Contacts for 1E44 CSU: Contacts of Structural Units for 1E44 Likely Quarternary Molecular Structure file(s) for 1E44 Structure Factors (101 Kb) Retrieve 1E44 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1E44 from S2C, [Save to disk] Re-refined 1e44 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1E44 in 3D

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Visual 3D analysis of 1E44

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 1E44, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1e44a_, region A [Jmol] [rasmolscript] [script source]     - Domain d1e44b_, region B [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: [1e44] [1e44_B] [1e44_A] SWISS-PROT database: [P00646] [P02984] Belongs to the colicin immunity protein (colip) functional family according to TCDB. Domain organization of [CEA3_ECOLX] [IMM3_ECOLX] by SWISSPFAM

Other resources with information on 1E44

Community annotation for 1E44 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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