4CHA	Hydrolase (Serine Proteinase)	date	Nov 26, 1984
title	Structure Of Alpha-Chymotrypsin Refined At 1.68 Angstroms Resolution
authors	H.Tsukada, D.M.Blow
compound		source
Molecule: Alpha-Chymotrypsin A Chain: A, E Ec: 3.4.21.1		Organism_scientific: Bos Taurus Organism_common: Cattle Organism_taxid: 9913
Molecule: Alpha-Chymotrypsin A Chain: B, F Ec: 3.4.21.1		Organism_scientific: Bos Taurus Organism_common: Cattle Organism_taxid: 9913
Molecule: Alpha-Chymotrypsin A Chain: C, G Ec: 3.4.21.1		Organism_scientific: Bos Taurus Organism_common: Cattle Organism_taxid: 9913
symmetry	Space Group: P 1 21 1	R_factor R_Free NULL
crystal cell	length a length b length c angle alpha angle beta angle gamma 49.230 67.390 65.990 90.00 101.80 90.00
method	X-Ray Diffraction	resolution	1.68 Å
ligand		enzyme	Hydrolase E.C.3.4.21.1 BRENDA
related structures	by homologous chain: 1T8O, 3VGC
Gene Ontology	Chain Function Process Component C, G F, B
Primary reference	Structure of alpha-chymotrypsin refined at 1.68 A resolution., Tsukada H, Blow DM, J Mol Biol 1985 Aug 20;184(4):703-11. PMID:4046030

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (77 Kb) [Save to disk] Biological Unit Coordinates (4cha.pdb1.gz) 73 Kb CSU: Contacts of Structural Units for 4CHA Likely Quarternary Molecular Structure file(s) for 4CHA Structure Factors (557 Kb) Retrieve 4CHA in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 4CHA from S2C, [Save to disk] Re-refined 4cha structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 4CHA 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 4CHA

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 4CHA, from MSDmotif at EBI Genome occurence of 4CHA's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d4chaa_, region A [Jmol] [rasmolscript] [script source]     - Domain d4chab_, 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: [4cha_B] [4cha_E] [4cha] [4cha_F] [4cha_A] [4cha_G] [4cha_C] SWISS-PROT database: [P00766] Domain organization of [CTRA_BOVIN] by SWISSPFAM Domain found in 4CHA: [Tryp_SPc ] by SMART

Other resources with information on 4CHA

Community annotation for 4CHA at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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Images from IMB Jena Image Library of Biological Macromolecules.

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