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  • Isolation and Characterization of the Neisseria Meningitidis lpxD-fabZ-lpxA Gene Cluster Involved in Lipid A Biosynthesis

    Author(s)
    Steeghs, L
    Jennings, MP
    Poolman, JT
    vanderLey, P
    Griffith University Author(s)
    Jennings, Michael P.
    Year published
    1997
    Metadata
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    Abstract
    The lpxD-fabZ-lpxA gene cluster involved in lipid A biosynthesis in Neisseria meningitidis has been cloned and sequenced. By complementation of a temperature-sensitive E. coli lpxD mutant, we first cloned a meningococcal chromosomal fragment that carries the lpxD homologue. Cloning and sequence analysis of chromosomal DNA downstream of lpxD revealed the presence of the fabZ and lpxA genes. This gene cluster shows high homology to the corresponding genes from several other bacterial species. The LpxA and LpxD proteins catalyze early steps in the lipid A biosynthetic pathway, adding the O- and N-linked 3-OH fatty acyl chains, ...
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    The lpxD-fabZ-lpxA gene cluster involved in lipid A biosynthesis in Neisseria meningitidis has been cloned and sequenced. By complementation of a temperature-sensitive E. coli lpxD mutant, we first cloned a meningococcal chromosomal fragment that carries the lpxD homologue. Cloning and sequence analysis of chromosomal DNA downstream of lpxD revealed the presence of the fabZ and lpxA genes. This gene cluster shows high homology to the corresponding genes from several other bacterial species. The LpxA and LpxD proteins catalyze early steps in the lipid A biosynthetic pathway, adding the O- and N-linked 3-OH fatty acyl chains, respectively. In E. coli and N. meningitidis, LpxD has the same specificity, in both cases adding 3-OH myristoyl chains; in contrast to E. coli, the meningococcal LpxA protein is presumed to add 3-OH lauroyl chains instead. The established sequence points the way to further experiments to define the basis for this difference in specificity, and should allow modification of meningococcal lipid A biosynthesis through gene exchange.
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    Journal Title
    Gene
    Volume
    190
    Issue
    2
    DOI
    https://doi.org/10.1016/S0378-1119(97)00005-X
    Subject
    Genetics
    Zoology
    Medical microbiology
    Publication URI
    http://hdl.handle.net/10072/121059
    Collection
    • Journal articles

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