The Enzyme Database

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Accepted name: cathepsin O
Reaction: The recombinant human enzyme hydrolyses synthetic endopeptidase substrates including Z-Phe-Arg-NHMec and Z-Arg-Arg-NHMec
Comments: Cathepsin O is a lysosomal cysteine peptidase of family C1 (papain family). The recombinant human enzyme is catalytically active at pH 6.0 and is inhibited by compound E-64. Cathepsin O is ubiquitously expressed in human tissues and the human gene locus is 4q31-32
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, MEROPS, CAS registry number: 162032-86-2
1.  Santamaría, I., Pendás, A.M. and López-Otín, C. Genomic structure and chromosomal localization of a human cathepsin O gene (CTSO). Genomics 53 (1998) 231–234. [DOI] [PMID: 9790772]
2.  Velasco, G., Ferrando, A.A., Puente, X.S., Sanchez, L.M. and López-Otín, C. Human cathepsin O. Molecular cloning from a breast carcinoma, production of the active enzyme in Escherichia coli, and expression analysis in human tissues. J. Biol. Chem. 269 (1994) 27136–27142. [PMID: 7929457]
[EC created 2000]

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