Mrp -: A new auxiliary gene essential for optimal expression of methicillin resistance in Staphylococcus aureus

被引:21
作者
Wu, SW
De Lencastre, H
机构
[1] Rockefeller Univ, Microbiol Lab, New York, NY 10021 USA
[2] Univ Nova Lisboa, Inst Tecnol Quim & Biol, P-2780 Oeiras, Portugal
来源
MICROBIAL DRUG RESISTANCE-MECHANISMS EPIDEMIOLOGY AND DISEASE | 1999年 / 5卷 / 01期
关键词
D O I
10.1089/mdr.1999.5.9
中图分类号
R51 [传染病];
学科分类号
100401 ;
摘要
Screening of a library of Tn551 insertional mutants selected for reduction in the methicillin resistance level of the parental Staphylococcus aureus strain COL resulted in the isolation of mutant RUSA266 in which the minimal inhibitory concentration (MIC) of the parent was reduced from 1,600 to 1.5 mu g/mL. Cloning and sequencing of the vicinity of the insertion site Omega 726 identified an open reading frame (orf1365) encoding a very large polypeptide of more than 1,365 amino acids. A unique feature of the deduced amino acid sequence was the presence of multiple tandem repeats of 75 amino acids in the polypeptide, reminiscent of the structure of high-molecular-weight cell-surface proteins EF* and Emb identified in some streptococcal strains. Mutant RUSA266 with the inactivated gene, which we shall provisionally refer to as mrp (for multiple repeat polypeptide), produced a peptidoglycan with altered muropeptide composition, and both the reduced antibiotic resistance and the altered cell wall composition were co-transduced in back-crosses into the parental strain COL, Additional sequencing upstream of mrp has revealed that this gene was part of a five-gene cluster occupying a 9.2-kh region of the staphylococcal chromosome and was composed of glmM (directly upstream of mrp), two open reading frames orf310 and orf269 coding for two hypothetical proteins, and the gene encoding the staphylococcal arginase (arg), Transcriptional analysis demonstrated that the five genes in the cluster were transcribed together.
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页码:9 / 18
页数:10
相关论文
共 37 条
[1]  
Ausubel F.M., 1992, SHORT PROTOCOLS MOL, V2nd
[2]  
Berger-Bachi Brigitte, 1994, Trends in Microbiology, V2, P389, DOI 10.1016/0966-842X(94)90617-3
[3]  
BERGERBACHI B, 1989, MOL GEN GENET, V219, P263
[4]   MAPPING AND CHARACTERIZATION OF MULTIPLE CHROMOSOMAL FACTORS INVOLVED IN METHICILLIN RESISTANCE IN STAPHYLOCOCCUS-AUREUS [J].
BERGERBACHI, B ;
STRASSLE, A ;
GUSTAFSON, JE ;
KAYSER, FH .
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY, 1992, 36 (07) :1367-1373
[5]  
CORNELIUS CE, 1980, CLIN BIOCH DOMESTIC, P235
[6]   THE BACILLUS-SUBTILIS-SIGL GENE ENCODES AN EQUIVALENT OF SIGMA-54 FROM GRAM-NEGATIVE BACTERIA [J].
DEBARBOUILLE, M ;
MARTINVERSTRAETE, I ;
KUNST, F ;
RAPOPORT, G .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1991, 88 (20) :9092-9096
[7]  
DEJONGE BLM, 1992, J BIOL CHEM, V267, P11255
[8]   MULTIPLE MECHANISMS OF METHICILLIN RESISTANCE AND IMPROVED METHODS FOR DETECTION IN CLINICAL ISOLATES OF STAPHYLOCOCCUS-AUREUS [J].
DELENCASTRE, H ;
SAFIGUEIREDO, AM ;
URBAN, C ;
RAHAL, J ;
TOMASZ, A .
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY, 1991, 35 (04) :632-639
[9]   MOLECULAR ASPECTS OF METHICILLIN RESISTANCE IN STAPHYLOCOCCUS-AUREUS [J].
DELENCASTRE, H ;
DEJONGE, BLM ;
MATTHEWS, PR ;
TOMASZ, A .
JOURNAL OF ANTIMICROBIAL CHEMOTHERAPY, 1994, 33 (01) :7-24
[10]   REASSESSMENT OF THE NUMBER OF AUXILIARY GENES ESSENTIAL FOR EXPRESSION OF HIGH-LEVEL METHICILLIN RESISTANCE IN STAPHYLOCOCCUS-AUREUS [J].
DELENCASTRE, H ;
TOMASZ, A .
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY, 1994, 38 (11) :2590-2598