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Production of recombinant sarcotoxin IA in Bombyx mori cells.


ABSTRACT: A cDNA for sarcotoxin IA, an antibacterial protein of Sarcophaga peregrina (fleshfly), was inserted into a silkworm baculovirus vector and expressed in Bm-N cells, a line of Bombyx mori cells. When a cysteine proteinase inhibitor, p-chloromercuribenzenesulphonic acid, was present in the culture medium, a significant amount of recombinant sarcotoxin IA accumulated, but without this reagent the product seemed to be degraded in this system. The C-terminus of the recombinant sarcotoxin IA seemed to be glycine, not amidated arginine as found in authentic sarcotoxin IA. Probably, Bm-N cells lack the C-terminal alpha-amidation enzyme.

SUBMITTER: Yamada K 

PROVIDER: S-EPMC1149755 | biostudies-other | 1990 Dec

REPOSITORIES: biostudies-other

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