Modification of glycopeptidolipids by an O-methyltransferase of Mycobacterium smegmatis

Glycopeptidolipids (GPLs) are a major component of the outer layers of the cell walls of several non-tuberculous mycobacteria. The Mycobacterium smegmatis GPLs consist of a diglycosylated lipopeptide core which is variably modified by acetylation and methylation. Analysis of a region of the M. smegm...

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Vydané v:Microbiology (Society for General Microbiology) Ročník 148; číslo Pt 10; s. 3079
Hlavní autori: Jeevarajah, Dharshini, Patterson, John H, McConville, Malcolm J, Billman-Jacobe, Helen
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: England 01.10.2002
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Abstract Glycopeptidolipids (GPLs) are a major component of the outer layers of the cell walls of several non-tuberculous mycobacteria. The Mycobacterium smegmatis GPLs consist of a diglycosylated lipopeptide core which is variably modified by acetylation and methylation. Analysis of a region of the M. smegmatis chromosome, upstream of the peptide synthetase gene, mps, revealed a GPL biosynthetic locus containing genes potentially involved in glycosylation, methylation, acetylation and transport of GPLs. Methyltransferases are required to modify rhamnose and the fatty acid of GPLs. Of the four methyltransferases encoded within the locus, one methyltransferase, Mtf2, was unlike sugar methyltransferases from other species. An mtf2 mutant was created and was shown to be unable to methylate the GPL fatty acids. Direct evidence is presented that Mtf2 is a methyltransferase that modifies the GPL fatty acid.
AbstractList Glycopeptidolipids (GPLs) are a major component of the outer layers of the cell walls of several non-tuberculous mycobacteria. The Mycobacterium smegmatis GPLs consist of a diglycosylated lipopeptide core which is variably modified by acetylation and methylation. Analysis of a region of the M. smegmatis chromosome, upstream of the peptide synthetase gene, mps, revealed a GPL biosynthetic locus containing genes potentially involved in glycosylation, methylation, acetylation and transport of GPLs. Methyltransferases are required to modify rhamnose and the fatty acid of GPLs. Of the four methyltransferases encoded within the locus, one methyltransferase, Mtf2, was unlike sugar methyltransferases from other species. An mtf2 mutant was created and was shown to be unable to methylate the GPL fatty acids. Direct evidence is presented that Mtf2 is a methyltransferase that modifies the GPL fatty acid.Glycopeptidolipids (GPLs) are a major component of the outer layers of the cell walls of several non-tuberculous mycobacteria. The Mycobacterium smegmatis GPLs consist of a diglycosylated lipopeptide core which is variably modified by acetylation and methylation. Analysis of a region of the M. smegmatis chromosome, upstream of the peptide synthetase gene, mps, revealed a GPL biosynthetic locus containing genes potentially involved in glycosylation, methylation, acetylation and transport of GPLs. Methyltransferases are required to modify rhamnose and the fatty acid of GPLs. Of the four methyltransferases encoded within the locus, one methyltransferase, Mtf2, was unlike sugar methyltransferases from other species. An mtf2 mutant was created and was shown to be unable to methylate the GPL fatty acids. Direct evidence is presented that Mtf2 is a methyltransferase that modifies the GPL fatty acid.
Glycopeptidolipids (GPLs) are a major component of the outer layers of the cell walls of several non-tuberculous mycobacteria. The Mycobacterium smegmatis GPLs consist of a diglycosylated lipopeptide core which is variably modified by acetylation and methylation. Analysis of a region of the M. smegmatis chromosome, upstream of the peptide synthetase gene, mps, revealed a GPL biosynthetic locus containing genes potentially involved in glycosylation, methylation, acetylation and transport of GPLs. Methyltransferases are required to modify rhamnose and the fatty acid of GPLs. Of the four methyltransferases encoded within the locus, one methyltransferase, Mtf2, was unlike sugar methyltransferases from other species. An mtf2 mutant was created and was shown to be unable to methylate the GPL fatty acids. Direct evidence is presented that Mtf2 is a methyltransferase that modifies the GPL fatty acid.
Author Jeevarajah, Dharshini
Billman-Jacobe, Helen
Patterson, John H
McConville, Malcolm J
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  givenname: John H
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  surname: Billman-Jacobe
  fullname: Billman-Jacobe, Helen
  organization: Departments of Microbiology and Immunology1, and Biochemistry and Molecular Biology2, University of Melbourne, Victoria 3010, Australia
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Snippet Glycopeptidolipids (GPLs) are a major component of the outer layers of the cell walls of several non-tuberculous mycobacteria. The Mycobacterium smegmatis GPLs...
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SubjectTerms Amino Acid Motifs
Amino Acid Sequence
Bacterial Proteins - genetics
Bacterial Proteins - metabolism
Gas Chromatography-Mass Spectrometry
Gene Deletion
Genetic Complementation Test
Glycolipids - chemistry
Glycolipids - metabolism
Glycopeptides - chemistry
Glycopeptides - metabolism
Methylation
Methyltransferases - genetics
Methyltransferases - metabolism
Molecular Sequence Data
Multigene Family
Mycobacterium smegmatis - enzymology
Mycobacterium smegmatis - genetics
Sequence Analysis, DNA
Spectrometry, Mass, Electrospray Ionization
Title Modification of glycopeptidolipids by an O-methyltransferase of Mycobacterium smegmatis
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