TY - JOUR
T1 - Structure and function of an isozyme of earthworm proteases as a new biocatalyst
AU - Sugimoto, Manabu
AU - Ishihara, Kohji
AU - Nakajima, Nobuyoshi
N1 - Funding Information:
This work was supported by a Grant-in-Aid for Scientific Research (B)(1) No.10556023 (1998–2000) from the Ministry of Education, Science, Sports, and Culture, Japan. We would like to acknowledge the financial supports of The Asahi Glass Foundation (2000–2001 and 2003–2005), Japan.
PY - 2003/9/1
Y1 - 2003/9/1
N2 - The amino acid sequence of the earthworm-serine protease, isozyme C, which shows not only elastase-like activity but also trypsin-like activity, was determined. The catalytic triad of the trypsin family, His, Asp, Ser, was conserved in isozyme C, but the primary substrate determinant of trypsin, Asp, was missing in isozyme C, the same as in elastase. One of the two Gly at the entrance of the substrate-binding pocket of trypsin was replaced by Val as in elastase, however, the other was replaced by Ser whereas Thr is present in elastase. Furthermore, isozyme C also showed esterase-like activity, which was applicable for the synthesis of useful substances.
AB - The amino acid sequence of the earthworm-serine protease, isozyme C, which shows not only elastase-like activity but also trypsin-like activity, was determined. The catalytic triad of the trypsin family, His, Asp, Ser, was conserved in isozyme C, but the primary substrate determinant of trypsin, Asp, was missing in isozyme C, the same as in elastase. One of the two Gly at the entrance of the substrate-binding pocket of trypsin was replaced by Val as in elastase, however, the other was replaced by Ser whereas Thr is present in elastase. Furthermore, isozyme C also showed esterase-like activity, which was applicable for the synthesis of useful substances.
KW - Earthworm
KW - Elastase
KW - Esterase-like activity
KW - Serine protease
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U2 - 10.1016/S1381-1177(03)00105-X
DO - 10.1016/S1381-1177(03)00105-X
M3 - Article
AN - SCOPUS:0042780321
VL - 23
SP - 405
EP - 409
JO - Journal of Molecular Catalysis - B Enzymatic
JF - Journal of Molecular Catalysis - B Enzymatic
SN - 1381-1177
IS - 2-6
ER -