2OCT	Protein Binding	date	Dec 21, 2006
title	Stefin B (Cystatin B) Tetramer
authors	S.Jenko Kokalj, G.Guncar, D.Turk
compound		source
Molecule: Cystatin B Chain: A, B Synonym: Liver Thiol Proteinase Inhibitor, Cpi-B, Stefin B Engineered: Yes Mutation: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Gene: Cstb Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Bl21(De3)Plyss Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet-11a
symmetry	Space Group: C 1 2 1	R_factor R_Free
crystal cell	length a length b length c angle alpha angle beta angle gamma 120.123 30.857 51.349 90.00 95.81 90.00
method	X-Ray Diffraction	resolution	1.40 Å
note	2OCT is a representative structure
Gene Ontology	Chain Function Process Component A, B endopeptidase inhibitor acti... cysteine-type endopeptidase ...
Primary reference	Essential role of proline isomerization in stefin B tetramer formation., Jenko Kokalj S, Guncar G, Stern I, Morgan G, Rabzelj S, Kenig M, Staniforth RA, Waltho JP, Zerovnik E, Turk D, J Mol Biol. 2007 Mar 9;366(5):1569-79. Epub 2006 Dec 16. PMID:17217964

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (40 Kb) [Save to disk] Biological Unit Coordinates (2oct.pdb1.gz) 69 Kb CSU: Contacts of Structural Units for 2OCT Likely Quarternary Molecular Structure file(s) for 2OCT Structure Factors (940 Kb) Retrieve 2OCT in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2OCT from S2C, [Save to disk] Re-refined 2oct structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2OCT 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 2OCT

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 2OCT, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2oct] [2oct_A] [2oct_B] SWISS-PROT database: [P04080] Belongs to the stefin b pore-forming protein (stefin b) family according to TCDB. Domain organization of [CYTB_HUMAN] by SWISSPFAM Domain found in 2OCT: [CY ] by SMART

Other resources with information on 2OCT

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

Movements, Movies and Images

Images from IMB Jena Image Library of Biological Macromolecules.

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