1IV5	Immune System	date	Mar 14, 2002
title	New Crystal Form Of Human Cd81 Large Extracellular Loop.
authors	K.Kitadokoro, M.Bolognesi, G.Grandi, P.Marco, G.Galli, R.Petracca F.Fabiana
compound		source
Molecule: Cd81 Antigen Chain: A, B Fragment: Cd81 Large Extracellular Loop Synonym: 26 Kda Cell Surface Protein Tapa-1 Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pezz 18
symmetry	Space Group: P 64	R_factor 0.229 R_Free 0.282
crystal cell	length a length b length c angle alpha angle beta angle gamma 102.052 102.052 35.283 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	2.60 Å
related structures	by homologous chain: 1G8Q
Gene Ontology	Chain Function Process Component A, B
Primary reference	Subunit association and conformational flexibility in the head subdomain of human CD81 large extracellular loop., Kitadokoro K, Ponassi M, Galli G, Petracca R, Falugi F, Grandi G, Bolognesi M, Biol Chem 2002 Sep;383(9):1447-52. PMID:12437138

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (34 Kb) [Save to disk] Biological Unit Coordinates (1iv5.pdb1.gz) 28 Kb CSU: Contacts of Structural Units for 1IV5 Likely Quarternary Molecular Structure file(s) for 1IV5 Structure Factors (45 Kb) Retrieve 1IV5 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1IV5 from S2C, [Save to disk] Re-refined 1iv5 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1IV5 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 1IV5

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 1IV5, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1iv5a_, region A [Jmol] [rasmolscript] [script source]     - Domain d1iv5b_, 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: [1iv5_B] [1iv5_A] [1iv5] SWISS-PROT database: [P60033] Belongs to the tetraspanin (tetraspanin) family according to TCDB. Domain organization of [CD81_HUMAN] by SWISSPFAM

Other resources with information on 1IV5

Community annotation for 1IV5 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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