1C3D	Complement	date	May 19, 1998
title	X-Ray Crystal Structure Of C3d: A C3 Fragment And Ligand For Complement Receptor 2
authors	B.Nagar, R.G.Jones, R.J.Diefenbach, D.E.Isenman, J.M.Rini
compound		source
Molecule: C3d Chain: A Engineered: Yes Mutation: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Cell_line: Bl21 Cellular_location: Serum Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21 (De3) Expression_system_vector_type: Pet Expression_system_vector: Pet 15b Expression_system_plasmid: Bl21
symmetry	Space Group: P 21 21 21	R_factor 0.188 R_Free 0.230
crystal cell	length a length b length c angle alpha angle beta angle gamma 60.820 64.378 87.160 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.80 Å
ligand	GOL	enzyme
related structures	by homologous chain: 1QQF, 1QSJ
Gene Ontology	Chain Function Process Component A
Primary reference	X-ray crystal structure of C3d: a C3 fragment and ligand for complement receptor 2., Nagar B, Jones RG, Diefenbach RJ, Isenman DE, Rini JM, Science 1998 May 22;280(5367):1277-81. PMID:9596584

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (54 Kb) [Save to disk] Biological Unit Coordinates (1c3d.pdb1.gz) 50 Kb LPC: Ligand-Protein Contacts for 1C3D CSU: Contacts of Structural Units for 1C3D Likely Quarternary Molecular Structure file(s) for 1C3D Retrieve 1C3D in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1C3D from S2C, [Save to disk]

View 1C3D 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 1C3D

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1C3D, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1c3d__, region [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: [1c3d_A] [1c3d] SWISS-PROT database: [P01024] Domain organization of [CO3_HUMAN] by SWISSPFAM Domain found in 1C3D: [Thiol-ester_cl ] by SMART

Other resources with information on 1C3D

Community annotation for 1C3D at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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