bleomycin hydrolase EC#: 3.4.22.40 • ChemWhat中文网

bleomycin hydrolase EC#: 3.4.22.40; 凯望编码 (ChemWhat Code): 1380752


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英文名	bleomycin hydrolase
Example Structure
别名	aminopeptidase C, aminopeptidase H, ApsC, BANA-hydrolase, BH, BH protein, Bleomycin hydrolase, BLH, Blh1p, BLM hydrolase, Blmh, BLMH protein, BMH, citrulline aminopeptidase, Gal6p, Hcy-thiolactonase, homocysteine thiolactonase, HTLase, hydrolase H, More, PEPC, yBLH, yeast cysteine protease
EC Number	3.4.22.40
CAS编号	53096-17-6
Comments	The molecule is a homohexamer in which the monomers have a papain-like tertiary structure (in peptidase family C1). The active sites are on the walls of a central channel through the molecule, and access of substrate molecules to them is obstructed by this and by the C-terminus of each polypeptide chain [3]. Bleomycin can scarcely be the natural substrate, and there are reports of limited endopeptidase activity. Known from bacteria as well as eukaryotic organisms. Hydrolase H from chicken muscle has many similarities to bleomycin hydrolase, but hydrolyses Ph-CO-Arg-2-naphthylamine as well as aminopeptidase substrates [2].
Cofactor
History
Reactions	Inactivates bleomycin B2 (a cytotoxic glycometallopeptide) by hydrolysis of a carboxyamide bond of beta-aminoalanine, but also shows general aminopeptidase activity. The specificity varies somewhat with source, but amino acid arylamides of Met, Leu and Ala are preferred.