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J. Biochem, 1990, Vol. 107, No. 5 703-707
© 1990 Japanese Biochemical Society

research-article

cDNA Cloning and Characterization of Geotrichum candidum Lipase II

Yuji Shimada*, Akio Sugihara*, Taro Iizumi** and Yoshio Tominaga*

*Osaka Municipal Technical Research Institute Joto-ku Osaka, Osaka 536;
**Kurita Water Industries, Ltd., Atsugi, Kanagawa 243–01

Geotrichum candidum produces two extracellular Upases, I and II. A lipase II cDNA clone was isolated from a cDNA library by colony hybridization using the 32P-labeled fragment of lipase I cDNA isolated previously. The nucleotide sequence of lipase II cDNA determined by the dideoxy chain terminating method includes the N- and C-terminal ami no acid sequences of lipase II, and the overall amino acid composition deduced from the cDNA coincides with that deduced on amino acid analysis of this protein. The cloned lipase II cDNA codes a protein of 544 amino acids and a part of the signal sequence of 13 amino acids. The peptide chain lengths of Upases I and II are the same, their overall identity being 84%. Furthermore, four Cys residues are completely conserved, which may participate in the formation of disulfide bridges. A homology search indicated that the G. candidum Upases and Candida cylindracea lipase are homologous enzymes and that they are members of the family.


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