2I6Q	Hydrolase	date	Aug 29, 2006
title	Complement Component C2a
authors	F.J.Milder, H.C.A.Raaijmakers, D.A.A.Vandeputte, A.Schouten, E.G.Huizinga, R.A.Romijn, W.Hemrika, A.Roos, M.R.Daha, P.Gros
compound		source
Molecule: Complement C2a Fragment Chain: A Ec: 3.4.21.43 Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Gene: C2a Expression_system: Mesocricetus Auratus Expression_system_common: Golden Hamster Expression_system_taxid: 10036 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pnut
symmetry	Space Group: P 1 21 1	R_factor 0.189 R_Free 0.240
crystal cell	length a length b length c angle alpha angle beta angle gamma 51.482 77.185 70.858 90.00 109.55 90.00
method	X-Ray Diffraction	resolution	2.10 Å
ligand	BMA, FUC, MLI, MN, NAG	enzyme	Hydrolase E.C.3.4.21.43 BRENDA
Gene Ontology	Chain Function Process Component A
Primary reference	Structure of complement component c2a: implications for convertase formation and substrate binding., Milder FJ, Raaijmakers HC, Vandeputte MD, Schouten A, Huizinga EG, Romijn RA, Hemrika W, Roos A, Daha MR, Gros P, Structure. 2006 Oct;14(10):1587-97. PMID:17027507

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (90 Kb) [Save to disk] Biological Unit Coordinates (2i6q.pdb1.gz) 84 Kb LPC: Ligand-Protein Contacts for 2I6Q CSU: Contacts of Structural Units for 2I6Q Likely Quarternary Molecular Structure file(s) for 2I6Q Structure Factors (216 Kb) Retrieve 2I6Q in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2I6Q from S2C, [Save to disk] Re-refined 2i6q structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2I6Q 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 2I6Q

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 2I6Q, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2i6q] [2i6q_A] SWISS-PROT database: [P06681] Domain organization of [CO2_HUMAN] by SWISSPFAM Domains found in 2I6Q: [Tryp_SPc] [VWA ] by SMART

Other resources with information on 2I6Q

Community annotation for 2I6Q at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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