Abstract
Carboxypeptidase Z is a serine carboxypeptidase secreted by Absidia zychae NRIC 1199. The cDNA and genomic DNA carrying the scpZ gene encoding carboxypeptidase Z were cloned and sequenced. The nucleotide sequences of the cDNA (1.4 kb) and the genomic DNA (3.3 kb) were analyzed and the intervening sequences were located by a comparison of the two. It was found that the scpZ gene was interrupted by 11 short introns, 50–75 nucleotides in length. Genomic Southern analysis showed that there was only one scpZ gene in the genome of A. zychae. The gene encoded a putative pre-proenzyme composed of 409 amino-acid residues of the mature carboxypeptidase Z (Mr 45 421) and an additional N-terminal sequence of 51 amino-acid residues. The amino-acid sequence around the active serine residue of carboxypeptidase Z (-G-E-S-Y-G-G-) differed from the consensus (-G-E-S-Y-A-G-) which is conserved in most of the serine carboxypeptidases so far analyzed.
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Communicated by M. Yamamoto
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Lee, B.R., Takeuchi, M. & Kobayashi, Y. Molecular cloning and sequence analysis of the scpZ gene encoding the serine carboxypeptidase of Absidia zychae . Curr Genet 27, 159–165 (1995). https://doi.org/10.1007/BF00313430
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DOI: https://doi.org/10.1007/BF00313430