EC - Endopeptidase So

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IntEnz Enzyme Nomenclature


Accepted name:
endopeptidase So
Other names:
E. coli cytoplasmic proteinase
Escherichia coli serine proteinase So
proteinase So
Systematic name:



An Escherichia coli cytoplasmic endopeptidase formerly included in EC Inhibited by Tos-Phe-CH2Cl, but not by Tos-Lys-CH2Cl.

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , MEROPS , UniPathway
Structural data: CSA , EC2PDB
CAS Registry Number: 81611-83-8


  1. Goldberg, A.L., Swamy, K.H.S., Chung, C.H. and Larimore, F.S.
    Proteases in Escherichia coli.
    Methods Enzymol. 80C : 680-702 (1981). [PMID: 7043205]
  2. Chung, C.H. and Goldberg, A.L.
    Purification and characterization of protease So, a cytoplasmic serine protease in Escherichia coli.
    J. Bacteriol. 154 : 231-238 (1983). [PMID: 6339474]

[EC created 1992 (EC created 1961 as EC, transferred 1972 to EC, modified 1986, part incorporated 1992)]