CLONING AND CHARACTERIZATION OF A GENE ENCODING A SECRETED TRIPEPTIDYL AMINOPEPTIDASE FROM STREPTOMYCES-LIVIDANS-66

被引：20

作者：

BUTLER, MJ ^{[1
]}

BINNIE, C ^{[1
]}

DIZONNO, MA ^{[1
]}

KRYGSMAN, P ^{[1
]}

SOLTES, GA ^{[1
]}

SOOSTMEYER, G ^{[1
]}

WALCZYK, E ^{[1
]}

MALEK, LT ^{[1
]}

机构：

[1] CANGENE CORP,MISSISSAUGA,ON L4V 1J7,CANADA

来源：

APPLIED AND ENVIRONMENTAL MICROBIOLOGY | 1995年 / 61卷 / 08期

关键词：

D O I：

10.1128/AEM.61.8.3145-3150.1995

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The gene encoding a tripeptidyl aminopeptidase (Tap) from Streptomyces lividans was cloned by using a simple agar plate activity assay. Overexpression of the cloned gene results in the production of a secreted protein,which has an apparent subunit molecular weight of 55,000 and is responsible for the major aminoterminal degradative activity in culture broths of S. lividans strains, A DNA sequence analysis revealed a potential protein-encoding region of the size expected to encode the observed protein, which contained a sequence that exhibited significant homology around a putative active site serine residue observed far lipases, esterases, and acyl transferases. Preceding the amino terminus of the secreted protein was a predicted signal peptide of 36 amino acids followed by a tripeptide, which could be autocatalytically removed from a secreted Tap precursor, The transcriptional start site for the gene was mapped by primer extension. Mutant strains of S. lividans lacking detectable Tap activity were able to grow and sporulate normally. Cross-species hybridization experiments showed that DNA homologs of the fap gene are present in most of the Streptomyces strains tested.

引用

页码：3145 / 3150

页数：6

共 30 条

[21] CLONING AND SEQUENCING OF A GENE ENCODING A NOVEL EXTRACELLULAR NEUTRAL PROTEINASE FROM STREPTOMYCES SP STRAIN-C5 AND EXPRESSION OF THE GENE IN STREPTOMYCES-LIVIDANS-1326 [J].