Structure of PDB 1kxr Chain B Binding Site BS01

Receptor Information
>1kxr Chain B (length=321) Species: 10116 (Rattus norvegicus) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
NAIKYLGQDYENLRARCLQNGVLFQDDAFPPVSHSLGFKELGPNSSKTYG
IKWKRPTELLSNPQFIVDGATRTDICQGALGDSWLLAAIASLTLNETILH
RVVPYGQSFQEGYAGIFHFQLWQFGEWVDVVVDDLLPTKDGKLVFVHSAQ
GNEFWSALLEKAYAKVNGSYEALSGGCTSEAFEDFTGGVTEWYDLQKAPS
DLYQIILKALERGSLLGCSINISDIRDLEAITFKNLVRGHAYSVTDAKQV
TYQGQRVNLIRMRNPWGEVEWKGPWSDNSYEWNKVDPYEREQLRVKMEDG
EFWMSFRDFIREFTKLEICNL
Ligand information
Ligand IDCA
InChIInChI=1S/Ca/q+2
InChIKeyBHPQYMZQTOCNFJ-UHFFFAOYSA-N
SMILES
SoftwareSMILES
CACTVS 3.341[Ca++]
ACDLabs 10.04
OpenEye OEToolkits 1.5.0		[Ca+2]
FormulaCa
NameCALCIUM ION
ChEMBL
DrugBankDB14577
ZINC
PDB chain1kxr Chain B Residue 3 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
Global viewLocal viewStructure summary

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PDB1kxr A Ca(2+) switch aligns the active site of calpain.
Resolution2.07 Å
Binding residue
(original residue number in PDB)		V99 G101 D106 E185
Binding residue
(residue number reindexed from 1)		V67 G69 D74 E153
Annotation score4
Enzymatic activity
Catalytic site (original residue number in PDB) Q109 S115 H272 N296 W298
Catalytic site (residue number reindexed from 1) Q77 S83 H240 N264 W266
Enzyme Commision number 3.4.22.52: calpain-1.
Gene Ontology
Molecular Function
GO:0004198 calcium-dependent cysteine-type endopeptidase activity
Biological Process
GO:0006508 proteolysis

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Molecular Function
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Biological Process
External links
PDB RCSB:1kxr, PDBe:1kxr, PDBj:1kxr
PDBsum1kxr
PubMed11893336
UniProtP97571|CAN1_RAT Calpain-1 catalytic subunit (Gene Name=Capn1)

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