1KXR	Hydrolase	date	Feb 01, 2002
title	Crystal Structure Of Calcium-Bound Protease Core Of Calpain
authors	T.Moldoveanu, C.M.Hosfield, D.Lim, J.S.Elce, Z.Jia, P.L.Davies
compound		source
Molecule: Thiol Protease Domains I And II Chain: A, B Fragment: Residues 27-356 Synonym: Calpain I Protease Core Ec: 3.4.22.17 Engineered: Yes Mutation: Yes		Organism_scientific: Rattus Norvegicus Organism_common: Norway Rat Organism_taxid: 10116 Gene: Capn1 Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21-De3 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet24d
symmetry	Space Group: C 1 2 1	R_factor 0.213 R_Free 0.256
crystal cell	length a length b length c angle alpha angle beta angle gamma 149.443 40.492 132.328 90.00 105.96 90.00
method	X-Ray Diffraction	resolution	2.07 Å
ligand	CA	enzyme	Hydrolase E.C.3.4.22.17 BRENDA
related structures	by homologous chain: 1KFU, 1MDW
Gene Ontology	Chain Function Process Component A, B
Primary reference	A Ca(2+) switch aligns the active site of calpain., Moldoveanu T, Hosfield CM, Lim D, Elce JS, Jia Z, Davies PL, Cell 2002 Mar 8;108(5):649-60. PMID:11893336

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (115 Kb) [Save to disk] Biological Unit Coordinates (1kxr.pdb1.gz) 56 Kb Biological Unit Coordinates (1kxr.pdb2.gz) 56 Kb LPC: Ligand-Protein Contacts for 1KXR CSU: Contacts of Structural Units for 1KXR Likely Quarternary Molecular Structure file(s) for 1KXR Retrieve 1KXR in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1KXR from S2C, [Save to disk]

View 1KXR 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 1KXR

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1KXR, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1kxra_, region A [Jmol] [rasmolscript] [script source]     - Domain d1kxrb_, region B [Jmol] [rasmolscript] [script source]

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1kxr_B] [1kxr_A] [1kxr] SWISS-PROT database: [P97571] Domain organization of [CAN1_RAT] by SWISSPFAM Domain found in 1KXR: [CysPc ] by SMART

Other resources with information on 1KXR

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

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