2OPO	Allergen	date	Jan 29, 2007
title	Crystal Structure Of The Calcium-Binding Pollen Allergen Che
authors	P.Verdino, W.Keller
compound		source
Molecule: Polcalcin Che A 3 Chain: A, B, C, D Synonym: Calcium-Binding Pollen Allergen Che A 3 Engineered: Yes		Organism_scientific: Chenopodium Album Organism_taxid: 3559 Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21 (De3) Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet-11b
symmetry	Space Group: P 21 21 2	R_factor 0.198 R_Free 0.247
crystal cell	length a length b length c angle alpha angle beta angle gamma 72.240 73.874 68.939 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.75 Å
ligand	CA, SO4	enzyme
note	2OPO supersedes 1PMZ
Gene Ontology	Chain Function Process Component A, D, C, B
Primary reference	Three-dimensional structure of the cross-reactive pollen allergen Che a 3: visualizing cross-reactivity on the molecular surfaces of weed, grass, and tree pollen allergens., Verdino P, Barderas R, Villalba M, Westritschnig K, Valenta R, Rodriguez R, Keller W, J Immunol. 2008 Feb 15;180(4):2313-21. PMID:18250440

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (69 Kb) [Save to disk] Biological Unit Coordinates (2opo.pdb1.gz) 31 Kb Biological Unit Coordinates (2opo.pdb2.gz) 33 Kb LPC: Ligand-Protein Contacts for 2OPO CSU: Contacts of Structural Units for 2OPO Likely Quarternary Molecular Structure file(s) for 2OPO Structure Factors (291 Kb) Retrieve 2OPO in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2OPO from S2C, [Save to disk] Re-refined 2opo structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2OPO 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 2OPO

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 2OPO, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2opo_C] [2opo] [2opo_D] [2opo_A] [2opo_B] SWISS-PROT database: [Q84V36] Domain organization of [POLC3_CHEAL] by SWISSPFAM Domain found in 2OPO: [EFh ] by SMART

Other resources with information on 2OPO

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

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