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    Cell wall polymers of Bacillus sphaericus: activities of enzymes involved in peptidoglycan precursor synthesis during sporulation

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    Authors
    Linnett, Paul E.
    Tipper, Donald J.
    UMass Chan Affiliations
    Department of Microbiology and Physiological Systems
    Department of Microbiology
    Document Type
    Journal Article
    Publication Date
    1974-10-01
    Keywords
    Bacteriology
    Microbiology
    Physiology
    
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    Abstract
    In synchronously sporulating cells of Bacillus sphaericus 9602, the specific activities of those enzymes specifically required for the synthesis of the UDP-N-acetyl-muramyl-pentapeptide precursor of vegetative cell wall peptidoglycan decay by 50% after the end of exponential cell division, probably as a consequence of dilution by newly synthesized protein. The meso-diaminopimelate ligase is the only new activity whose synthesis is required for synthesis of the nucleotide-pentapeptide precursor of spore cortex peptidoglycan. The addition of d-Ala-d-Ala to the nucleotide tripeptide is catalyzed by an enzyme present in both vegetative and sporulating cells, which apparently does not discriminate between lysine- and diaminopimelate-containing acceptors. The activities of the l-Ala and d-Ala-d-Ala ligases and of the d-Ala-d-Ala synthetase increases in parallel with the appearance of the diaminopimelate ligase, indicating coordinate derepression and suggesting operon-like organization of the appropriate structural genes.
    Source

    J Bacteriol. 1974 Oct;120(1):342-54. Link to article on publisher's site

    Permanent Link to this Item
    http://hdl.handle.net/20.500.14038/36497
    PubMed ID
    4417383
    Related Resources

    Link to Article in PubMed

    Rights
    Copyright © 1974, American Society for Microbiology. Publisher PDF posted as allowed by the publisher's copyright policy at https://journals.asm.org/content/copyright-transfer-and-supplemental-material-license-agreement-2017.
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