Major peptidoglycan transglycosylase activity in Streptococcus pneumoniae that is not a penicillin-binding protein |
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Authors: | Wan Park Hiroyuki Seto Regine Hakenbeck Michio Matsuhashi |
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Affiliation: | NPI, University Research Park, Salt Lake City, UT 84108, U.S.A.;Department of Microbiology, North Carolina State University, Raleigh, NC 27695, U.S.A. |
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Abstract: | Abstract In this communication, results support the conclusion that succinate can repress hexose-catabolizing enzymes in Rhizobium sp. 32H1 in a manner similar to catabolite repression, such as that seen in Pseudomonas aeruginosa [9,27]. Enzymes of the Embden-Meyerhof-Parnas and Entner-Doudoroff pathways were only detected in cells cultured on hexoses and were not present in succinate-grown cells. Initial enzymes of fructose and mannitol metabolism were present in cells gorwn on fructose and mannitol, respectively. NADP-linked 6-phosphogluconate dehydrogenase was not detected in cell-free extracts regardless of the carbon source. |
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Keywords: | Carbon catabolism hexose metabolism regulation Rhizobium |
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