3ERB	Hydrolase	date	Oct 01, 2008
title	The Crystal Structure Of C2b, A Fragment Of Complement Compo Produced During C3-Convertase Formation
authors	S.V.L.Narayan, V.Krishnan
compound		source
Molecule: Complement C2 Chain: A Fragment: Complement C2b Fragment, N-Terminal Fragment Synonym: C3c5 Convertase, Complement C2b Fragment Ec: 3.4.21.43 Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Trichoplusia Ni Expression_system_common: Cabbage Looper Expression_system_taxid: 7111 Expression_system_cell_line: High Five(Bti-Tn-5b1-4) Expression_system_vector_type: Baculovirus
symmetry	Space Group: P 31	R_factor 0.214 R_Free 0.240
crystal cell	length a length b length c angle alpha angle beta angle gamma 60.060 60.060 61.687 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	1.80 Å
ligand		enzyme	Hydrolase E.C.3.4.21.43 BRENDA
note	3ERB is a representative structure
Gene Ontology	Chain Function Process Component A
Primary reference	The structure of C2b, a fragment of complement component C2 produced during C3 convertase formation., Krishnan V, Xu Y, Macon K, Volanakis JE, Narayana SV, Acta Crystallogr D Biol Crystallogr. 2009 Mar;65(Pt 3):266-74. Epub 2009, Feb 20. PMID:19237749

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (37 Kb) [Save to disk] Biological Unit Coordinates (3erb.pdb1.gz) 32 Kb CSU: Contacts of Structural Units for 3ERB Likely Quarternary Molecular Structure file(s) for 3ERB Structure Factors (326 Kb) Retrieve 3ERB in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 3ERB from S2C, [Save to disk] Re-refined 3erb structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 3ERB 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 3ERB

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 3ERB, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [3erb] [3erb_A] SWISS-PROT database: [P06681] Domain organization of [CO2_HUMAN] by SWISSPFAM Domain found in 3ERB: [CCP ] by SMART

Other resources with information on 3ERB

Community annotation for 3ERB at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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