Abstract

The 4.2 kbp lys1+ gene of Schizosaccharomyces pombe encoding the large subunit of alpha-aminoadipate reductase (EC1.2.1.31), an enzyme specific to lysine synthesis in higher fungi, was completely sequenced at the nucleotide level from pLYS1H. The S. pombe lys1+ gene product consists of 1415 amino acid residues and has a putative molecular weight of 155.8 kDa. The encoded protein converts alpha-aminoadipic acid to alpha-aminoadipate-delta-semialdehyde by an ATP-mediated adenylation. Analysis of the sequence showed that the putative protein encoded by lys1+ shares strong homology with the peptide antibiotic synthetases which also use in adenylation step.

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