Enzymes
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- Name help_outline 2-N,3-O-bis[(3R)-3-hydroxytetradecanoyl]-α-D-glucosaminyl 1-phosphate Identifier CHEBI:57957 Charge -2 Formula C34H64NO12P InChIKeyhelp_outline HEHQDWUWJVPREQ-XQJZMFRCSA-L SMILEShelp_outline CCCCCCCCCCC[C@@H](O)CC(=O)N[C@H]1[C@H](O[C@H](CO)[C@@H](O)[C@@H]1OC(=O)C[C@H](O)CCCCCCCCCCC)OP([O-])([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 2 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline UDP-2-N,3-O-bis[(3R)-3-hydroxytetradecanoyl]-α-D-glucosamine Identifier CHEBI:78847 Charge -2 Formula C43H75N3O20P2 InChIKeyhelp_outline KOJCFMYSTWNMQW-RUAJDYCTSA-L SMILEShelp_outline CCCCCCCCCCC[C@@H](O)CC(=O)N[C@H]1[C@@H](OP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)n2ccc(=O)[nH]c2=O)O[C@H](CO)[C@@H](O)[C@@H]1OC(=O)C[C@H](O)CCCCCCCCCCC 2D coordinates Mol file for the small molecule Search links Involved in 3 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,431 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline lipid A disaccharide (E. coli) Identifier CHEBI:58466 Charge -2 Formula C68H127N2O20P InChIKeyhelp_outline HLDJGHAAKRKPAV-QDORLFPLSA-L SMILEShelp_outline CCCCCCCCCCC[C@@H](O)CC(=O)N[C@H]1[C@H](OC[C@H]2O[C@H](OP([O-])([O-])=O)[C@H](NC(=O)C[C@H](O)CCCCCCCCCCC)[C@@H](OC(=O)C[C@H](O)CCCCCCCCCCC)[C@@H]2O)O[C@H](CO)[C@@H](O)[C@@H]1OC(=O)C[C@H](O)CCCCCCCCCCC 2D coordinates Mol file for the small molecule Search links Involved in 2 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline UDP Identifier CHEBI:58223 Charge -3 Formula C9H11N2O12P2 InChIKeyhelp_outline XCCTYIAWTASOJW-XVFCMESISA-K SMILEShelp_outline O[C@@H]1[C@@H](COP([O-])(=O)OP([O-])([O-])=O)O[C@H]([C@@H]1O)n1ccc(=O)[nH]c1=O 2D coordinates Mol file for the small molecule Search links Involved in 576 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:22668 | RHEA:22669 | RHEA:22670 | RHEA:22671 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Related reactions help_outline
More general form(s) of this reaction
Publications
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Nucleotide sequence of the Escherichia coli gene for lipid A disaccharide synthase.
Crowell D.N., Reznikoff W.S., Raetz C.R.H.
The lpxB gene of Escherichia coli, believed to be the structural gene for lipid A disaccharide synthase, is located in the min 4 region of the chromosome. It is adjacent to and clockwise of the lpxA gene, which is thought to encode UDP-N-acetylglucosamine acyltransferase. Preliminary evidence sugg ... >> More
The lpxB gene of Escherichia coli, believed to be the structural gene for lipid A disaccharide synthase, is located in the min 4 region of the chromosome. It is adjacent to and clockwise of the lpxA gene, which is thought to encode UDP-N-acetylglucosamine acyltransferase. Preliminary evidence suggests that lpxA and lpxB are cotranscribed in the clockwise direction and thus constitute part of a previously unknown operon (D. N. Crowell, M. S. Anderson, and C. R. H. Raetz, J. Bacteriol. 168:152-159, 1986). We now report the complete nucleotide sequence of a 1,522-base-pair PvuII-HincII fragment known to carry the lpxB gene. This sequence contained an open reading frame of 1,149 base pairs, in agreement with the predicted size, location, and orientation of lpxB. There was a second open reading frame 5' to, and in the same orientation as, lpxB that corresponded to lpxA. The ochre codon terminating lpxA was shown to overlap the methionine codon identified as the initiation codon for lpxB, suggesting that these genes are cotranscribed and translationally coupled. A third open reading frame was also shown to begin at the 3' end of lpxB with analogous overlap between the opal codon terminating lpxB and the methionine codon that putatively initiates translation downstream of lpxB in the clockwise direction. These results argue that at least three genes constitute a translationally coupled operon in the min 4 region of the E. coli chromosome. The accompanying paper by Tomasiewicz and McHenry (J. Bacteriol. 169:5735-5744, 1987) presents 4.35 kilobases of DNA sequence, beginning at the 3' end of lpxB, and argues that dnaE and several other open reading frames may be members of this operon. << Less
J. Bacteriol. 169:5727-5734(1987) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.
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The biosynthesis of gram-negative endotoxin. Formation of lipid A disaccharides from monosaccharide precursors in extracts of Escherichia coli.
Ray B.L., Painter G., Raetz C.R.
We have discovered an enzyme in the cytosol of Escherichia coli that generates lipid A disaccharides from monosaccharide precursors by the following route: 2,3-diacyl-GlcN-1-P + UDP-2,3-diacyl-GlcN----2,3-diacyl-GlcN (beta, 1----6) 2,3-diacyl-GlcN-1-P + UDP. Previous studies from our laboratory ha ... >> More
We have discovered an enzyme in the cytosol of Escherichia coli that generates lipid A disaccharides from monosaccharide precursors by the following route: 2,3-diacyl-GlcN-1-P + UDP-2,3-diacyl-GlcN----2,3-diacyl-GlcN (beta, 1----6) 2,3-diacyl-GlcN-1-P + UDP. Previous studies from our laboratory have documented the presence in vivo of the precursors 2,3-diacylglucosamine 1-phosphate (2,3-diacyl-GlcN-1-P) (lipid X of E. coli) and UDP-2,3-diacylglucosamine (UDP-2,3-diacyl-GlcN) (Bulawa, C.E., and Raetz, C.R.H.J. Biol. Chem. 259, 4846-4851). Both substrates are novel glucosamine-derived phospholipids, acylated with beta-hydroxymyristoyl moieties, and they accumulate in E. coli mutants defective in the pgsB gene. Synthetic ADP-, GDP-, and CDP-2,3-diacylglucosamines are inefficient substrates compared to the naturally occurring UDP derivative. The free-acid form of the tetraacyldisaccharide 1-phosphate product (C68H129N2O20P) that is generated in vitro has Mr = 1325.74 as judged by fast atom bombardment mass spectrometry. Mild acid hydrolysis (0.1 M HCl for 30 min at 100 degrees C) liberates greater than 95% of the phosphate moiety as Pi. Detailed analysis by 1H and 13C NMR spectroscopy confirms the presence of a phosphate residue at position 1 of the disaccharide, an alpha-anomeric configuration at the reducing end, and a beta, 1----6 linkage between the two glucosamines. Importantly the disaccharide 1-phosphate synthase is missing in extracts of E. coli strains harboring the pgsB1 mutation, consistent with the massive accumulation of 2,3-diacyl-GlcN-1-P and UDP-2,3-diacyl-GlcN in vivo. The enzymatic reaction reported here represents a major biosynthetic route for the formation of lipid A disaccharides in E. coli and other Gram-negative bacteria. An in vitro system for the biosynthesis of lipid A disaccharides has not been described previously. << Less
J. Biol. Chem. 259:4852-4859(1984) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.