2XRC Immune System date Sep 13, 2010
title Human Complement Factor I
authors P.Roversi, S.Johnson, S.M.Lea
compound source
Molecule: Human Complement Factor I
Chain: A, B, C, D
Synonym: C3bc4b Inactivator, Complement Factor I Heavy Cha Complement Factor I Light Chain, Kaf;
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Tissue: Serum
symmetry Space Group: P 1
R_factor 0.19959 R_Free 0.23821
length a length b length c angle alpha angle beta angle gamma
71.317 234.721 40.300 89.98 90.18 90.03
method X-Ray Diffractionresolution 2.69 Å
ligand CA, NAG enzyme Hydrolase E.C. BRENDA
A, D, C, B
  • scavenger receptor activity

  • Primary referenceStructural basis for complement factor I control and its disease-associated sequence polymorphisms., Roversi P, Johnson S, Caesar JJ, McLean F, Leath KJ, Tsiftsoglou SA, Morgan BP, Harris CL, Sim RB, Lea SM, Proc Natl Acad Sci U S A. 2011 Aug 2;108(31):12839-44. Epub 2011 Jul 18. PMID:21768352
    Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (316 Kb) [Save to disk]
  • Biological Unit Coordinates (2xrc.pdb1.gz) 81 Kb
  • Biological Unit Coordinates (2xrc.pdb2.gz) 85 Kb
  • Biological Unit Coordinates (2xrc.pdb3.gz) 80 Kb
  • Biological Unit Coordinates (2xrc.pdb4.gz) 80 Kb
  • LPC: Ligand-Protein Contacts for 2XRC
  • CSU: Contacts of Structural Units for 2XRC
  • Structure Factors (1654 Kb)
  • Retrieve 2XRC in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 2XRC from S2C, [Save to disk]
  • Re-refined 2xrc structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 2XRC 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 2XRC
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 2XRC, from MSDmotif at EBI
  • Fold representative 2xrc from FSSP and Dali (Families of Structurally Similar Proteins)
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [2xrc] [2xrc_C] [2xrc_B] [2xrc_A] [2xrc_D]
  • SWISS-PROT database:
  • Domain organization of by SWISSPFAM
  • Domains found in 2XRC: [FIMAC] [LDLa] [SR] [Tryp_SPc ] by SMART
  • Other resources with information on 2XRC
  • Community annotation for 2XRC at PDBWiki (http://pdbwiki.org)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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