Polyporopepsin

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Polyporopepsin (EC 3.4.23.29, Polyporus aspartic proteinase, Irpex lacteus aspartic proteinase, Irpex lacteus carboxyl proteinase B) is an enzyme.^[1]^[2] This enzyme catalyses the following chemical reaction

Milk clotting activity, broad specificity, but fails to cleave Leu¹⁵-Tyr or Tyr¹⁶-Leu of insulin B chain

This enzyme is isolated from the basidiomycete Polyporus tulipiferae.

References

↑ Kobayashi, H., Kusakabe, I. and Murakami, K. (1983). "Substrate specificity of a carboxyl proteinase from Irpex lacteus". Agric. Biol. Chem. 47: 1921–1923. doi:10.1271/bbb1961.47.1921.
↑ Kobayashi, H., Sekibata, S., Shibuya, H., Yoshida, S., Kusakabe, I. and Murakami, K. (1989). "Cloning and sequence analysis of cDNA for Irpex lacteus aspartic proteinase". Agric. Biol. Chem. 53: 1927–1933. doi:10.1271/bbb1961.53.1927.

External links

Polyporopepsin at the US National Library of Medicine Medical Subject Headings (MeSH)

Proteases: aspartate proteases (EC 3.4.23)

Vertebrate	Pepsin Chymosin Renin Signal peptide peptidase Beta secretase 1 2

Pathogenic	Plasmepsin HIV-1 protease

Plant	Nepenthesin

Cathepsin	D E

Enzymes

Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis Enzyme kinetics Lineweaver–Burk plot Michaelis–Menten kinetics

Regulation	Allosteric regulation Cooperativity Enzyme inhibitor

Classification	EC number Enzyme superfamily Enzyme family List of enzymes

Types	EC1 Oxidoreductases(list) EC2 Transferases(list) EC3 Hydrolases(list) EC4 Lyases(list) EC5 Isomerases(list) EC6 Ligases(list)

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