Structure of PDB 1kxr Chain B

Receptor sequence
>1kxrB (length=321) Species: 10116 (Rattus norvegicus) [Search protein sequence]
NAIKYLGQDYENLRARCLQNGVLFQDDAFPPVSHSLGFKELGPNSSKTYG
IKWKRPTELLSNPQFIVDGATRTDICQGALGDSWLLAAIASLTLNETILH
RVVPYGQSFQEGYAGIFHFQLWQFGEWVDVVVDDLLPTKDGKLVFVHSAQ
GNEFWSALLEKAYAKVNGSYEALSGGCTSEAFEDFTGGVTEWYDLQKAPS
DLYQIILKALERGSLLGCSINISDIRDLEAITFKNLVRGHAYSVTDAKQV
TYQGQRVNLIRMRNPWGEVEWKGPWSDNSYEWNKVDPYEREQLRVKMEDG
EFWMSFRDFIREFTKLEICNL
3D structure
PDB1kxr A Ca(2+) switch aligns the active site of calpain.
ChainB
Resolution2.07 Å
3D
structure
Catalytic site residues are labeled in the structure
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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.
Interaction with ligand
Site
#		 Ligand Ligand
chain		 Binding residues on receptor
(original residue number in PDB)		 Binding residues on receptor
(residue number reindexed from 1)		 Binding affinity
BS01 CA B V99 G101 D106 E185 V67 G69 D74 E153
BS02 CA B E302 D309 M329 D331 E333 E270 D277 M297 D299 E301
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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