MOLECULAR-CLONING AND NUCLEOTIDE-SEQUENCE OF THE ARGINASE GENE OF BACILLUS-BREVIS TT02-8 AND ITS EXPRESSION IN ESCHERICHIA-COLI

The gene from Bacillus brevis TT02-8 encoding arginase was cloned into Escherichia coli, and its nucleotide sequence was identified. The nuc leotide sequence contained an open reading frame that encoded a polype ptide of 298 amino acid residues with a predicted molecular weight of 31,891, which was consistent with that previously calculated for argin ase purified from this bacterium. Comparison of the deduced amino acid sequence of the B. brevis TT02-8 arginase with that of the prokaryoti c and eukaryotic arginases of Bacillus caldovelox, Bacillus subtilis, Agrobacterium Ti plasmid C58, Saccharomyces cerevisiae, Coccidioides i mmitis, Xenopus laevis, Rana catesbeiana, rat liver, and human liver, showed 33-66% of the sequences to be similar; there were several highl y conserved regions. Arginase activity was detected in Escherichia col i cells transformed with an expression plasmid of the cloned arginase gene.