| pubmed-article:3729342 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:3729342 | lifeskim:mentions | umls-concept:C0004661 | lld:lifeskim |
| pubmed-article:3729342 | lifeskim:mentions | umls-concept:C0070235 | lld:lifeskim |
| pubmed-article:3729342 | lifeskim:mentions | umls-concept:C1705920 | lld:lifeskim |
| pubmed-article:3729342 | lifeskim:mentions | umls-concept:C0871161 | lld:lifeskim |
| pubmed-article:3729342 | pubmed:issue | 5 | lld:pubmed |
| pubmed-article:3729342 | pubmed:dateCreated | 1986-8-6 | lld:pubmed |
| pubmed-article:3729342 | pubmed:abstractText | The penicillin-binding proteins (PBPs) of four species of the genus Bacteroides were examined in cell envelope preparations from exponentially growing cultures and intact cells. Upon examination by sodium dodecyl sulfate-polyacrylamide electrophoresis, three major high-molecular-weight PBPs (molecular weight, 58,000 to 82,000) were resolved, and low-molecular-weight PBPs were seen in all strains except Bacteroides fragilis. The sporadic appearance of PBP 4 in B. fragilis (molecular weight, approximately 45,000) was shown not to be influenced by the concentration of free iron available in the medium or by the stage of growth at which the batch culture was harvested. No PBP that was inhibited by an aerobic environment was demonstrated. The affinity of 35 beta-lactam antibiotics for the PBPs from envelope preparations was examined and correlated with the morphological response. Most compounds bound initially to PBP 2 and then PBP 1, correlating with a primary response of filamentation and then spheroplasting and lysis. Compounds such as clavulanic acid bound to PBP 3 at concentrations causing round cells. Based on the data from this study, it is proposed that the three high-molecular-weight PBPs of Bacteroides fragilis, Bacteroides vulgatus, Bacteroides thetaiotaomicron, and Bacteroides ovatus correlate to the three high-molecular-weight PBPs of Escherichia coli and that the PBPs of Bacteroides species perform the same enzymic role in cell wall biosynthesis as their counterparts in E. coli. Therefore, the components of PBP 1 are involved in cell elongation, PBP 2 is involved in septum formation, and PBP 3 is involved in maintenance of cell shape (i.e., PBP 2 in Bacteroides spp. = PBP 3 in E. coli, and PBP 3 in Bacteroides spp. = BPB 2 in E. coli). | lld:pubmed |
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| pubmed-article:3729342 | pubmed:language | eng | lld:pubmed |
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| pubmed-article:3729342 | pubmed:citationSubset | IM | lld:pubmed |
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| pubmed-article:3729342 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:3729342 | pubmed:month | May | lld:pubmed |
| pubmed-article:3729342 | pubmed:issn | 0066-4804 | lld:pubmed |
| pubmed-article:3729342 | pubmed:author | pubmed-author:WiseRR | lld:pubmed |
| pubmed-article:3729342 | pubmed:author | pubmed-author:PiddockL JLJ | lld:pubmed |
| pubmed-article:3729342 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:3729342 | pubmed:volume | 29 | lld:pubmed |
| pubmed-article:3729342 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:3729342 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:3729342 | pubmed:pagination | 825-32 | lld:pubmed |
| pubmed-article:3729342 | pubmed:dateRevised | 2009-11-18 | lld:pubmed |
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| pubmed-article:3729342 | pubmed:year | 1986 | lld:pubmed |
| pubmed-article:3729342 | pubmed:articleTitle | Properties of the penicillin-binding proteins of four species of the genus Bacteroides. | lld:pubmed |
| pubmed-article:3729342 | pubmed:publicationType | Journal Article | lld:pubmed |
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