The Enzyme Database

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EC 3.4.23.12     
Accepted name: nepenthesin
Reaction: Similar to pepsin, but also cleaves on either side of Asp and at Lys┼Arg
Other name(s): Nepenthes aspartic proteinase; Nepenthes acid proteinase; nepenthacin; nepenthasin; aspartyl endopeptidase
Comments: From the insectivorous plants Nepenthes spp. (secretions) and Drosera peltata (ground-up leaves). Aspartic endopeptidases are probably present in many other plants, including Lotus [3] and sorghum [2]. In peptidase family A1 (pepsin A family)
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, MEROPS, CAS registry number: 9073-80-7
References:
1.  Amagase, S., Nakayama, S. and Tsugita, A. Acid protease in Nepenthes. II. Study on the specificty of nepenthesin. J. Biochem. (Tokyo) 66 (1969) 431–439. [PMID: 5354017]
2.  Garg, G.K. and Virupaksha, T.K. Acid protease from germinated sorghum. 2. Substrate specificity with synthetic peptides and ribonuclease A. Eur. J. Biochem. 17 (1970) 4–12. [PMID: 5486576]
3.  Shinano, S. and Fukushima, K. Studies on lotus seed protease. Part III. Some physicochemical and enzymic properties. Agric. Biol. Chem. 35 (1971) 1488–1494.
4.  Amagase, S. Digestive enzymes in insectivorous plants. III. Acid proteases in the genus Nepenthes and Drosera peltata. J. Biochem. (Tokyo) 72 (1972) 73–81. [PMID: 5069751]
5.  Takahashi, K., Chang, W-J. and Ko, J-S. Specific inhibition of acid proteases from brain, kidney, skeletal muscle, and insectivorous plants by diazoacetyl-DL-norleucine methyl ester and by pepstatin. J. Biochem. (Tokyo) 76 (1974) 897–899. [PMID: 4436292]
6.  Tökés, Z.A., Woon, W.C. and Chambers, S.M. Digestive enzymes secreted by the carnivorous plant Nepenthes macferlani L. Planta 119 (1974) 39–46. [PMID: 16526095]
[EC 3.4.23.12 created 1972 as EC 3.4.99.4, transferred 1978 to EC 3.4.23.12, modified 1981]
 
 


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