Enzymes
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- Name help_outline an α-Kdo-(2→6)-lipid IVA Identifier CHEBI:176428 Charge -5 Formula C32H45N2O30P2R4 SMILEShelp_outline [C@H]1(OP(=O)([O-])[O-])[C@H](OC(=O)C[C@@H](*)O)[C@@H](NC(=O)C[C@@H](*)O)[C@@H](O[C@@H]1CO[C@@]2(C(=O)[O-])O[C@@H]([C@H](O)[C@@H](C2)O)[C@@H](CO)O)OC[C@@H]3[C@H]([C@@H]([C@H]([C@H](O3)OP(=O)([O-])[O-])NC(=O)C[C@@H](*)O)OC(=O)C[C@@H](*)O)O 2D coordinates Mol file for the small molecule Search links Involved in 6 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline CMP-3-deoxy-β-D-manno-octulosonate Identifier CHEBI:85987 Charge -2 Formula C17H24N3O15P InChIKeyhelp_outline YWWJKULNWGRYAS-UOVSKDHASA-L SMILEShelp_outline Nc1ccn([C@@H]2O[C@H](COP([O-])(=O)O[C@]3(C[C@@H](O)[C@@H](O)[C@H](O3)[C@H](O)CO)C([O-])=O)[C@@H](O)[C@H]2O)c(=O)n1 2D coordinates Mol file for the small molecule Search links Involved in 11 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline an α-Kdo-(2→4)-α-Kdo-(2→6)-lipid IVA Identifier CHEBI:176429 Charge -6 Formula C40H56N2O37P2R4 SMILEShelp_outline [C@H]1(OP(=O)([O-])[O-])[C@H](OC(=O)C[C@@H](*)O)[C@@H](NC(=O)C[C@@H](*)O)[C@@H](O[C@@H]1CO[C@@]2(C(=O)[O-])O[C@@H]([C@H](O)[C@@H](C2)O[C@@]3(C(=O)[O-])O[C@@H]([C@H](O)[C@@H](C3)O)[C@@H](CO)O)[C@@H](CO)O)OC[C@@H]4[C@H]([C@@H]([C@H]([C@H](O4)OP(=O)([O-])[O-])NC(=O)C[C@@H](*)O)OC(=O)C[C@@H](*)O)O 2D coordinates Mol file for the small molecule Search links Involved in 12 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline CMP Identifier CHEBI:60377 Charge -2 Formula C9H12N3O8P InChIKeyhelp_outline IERHLVCPSMICTF-XVFCMESISA-L SMILEShelp_outline Nc1ccn([C@@H]2O[C@H](COP([O-])([O-])=O)[C@@H](O)[C@H]2O)c(=O)n1 2D coordinates Mol file for the small molecule Search links Involved in 164 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
Cross-references
| RHEA:69392 | RHEA:69393 | RHEA:69394 | RHEA:69395 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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| MetaCyc help_outline |
Related reactions help_outline
Specific form(s) of this reaction
Publications
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Molecular cloning, sequence analysis, and functional characterization of the lipopolysaccharide biosynthetic gene kdtA encoding 3-deoxy-alpha-D-manno-octulosonic acid transferase of Chlamydia pneumoniae strain TW-183.
Loebau S., Mamat U., Brabetz W., Brade H.
The gene kdtA of Chlamydia pneumoniae strain TW-183, encoding the enzyme 3-deoxy-alpha-D-manno-octulosonic acid (Kdo) transferase of lipopolysaccharide biosynthesis, was cloned and sequenced. A single open reading frame of 1314 bp was identified, the deduced amino acid sequence of which revealed 6 ... >> More
The gene kdtA of Chlamydia pneumoniae strain TW-183, encoding the enzyme 3-deoxy-alpha-D-manno-octulosonic acid (Kdo) transferase of lipopolysaccharide biosynthesis, was cloned and sequenced. A single open reading frame of 1314 bp was identified, the deduced amino acid sequence of which revealed 69% similarity and 43% identity with KdtA of Chlamydia trachomatis and Chlamydia psittaci. The gene was expressed in the Gram-positive host Corynebacterium glutamicum and the primary gene product was characterized as a multifunctional glycosyltransferase. Cell-free extracts generated in vitro the genus-specific epitope of Chlamydia composed of the trisaccharide alphaKdo(2-8)alphaKdo(2-4)alphaKdo. The results show that a single polypeptide affords three different glycosidic bonds, which is in contradiction to the dogma of glycobiology: 'one enzyme - one glycosidic bond'. << Less
Mol. Microbiol. 18:391-399(1995) [PubMed] [EuropePMC]
This publication is cited by 5 other entries.
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Biosynthesis of endotoxins. Purification and catalytic properties of 3-deoxy-D-manno-octulosonic acid transferase from Escherichia coli.
Belunis C.J., Raetz C.R.
The enzyme 3-deoxy-D-manno-octulosonic acid (Kdo) transferase is encoded by the kdtA gene of Escherichia coli and plays a key role in lipopolysaccharide biosynthesis. It transfers Kdo from CMP-Kdo to lipid A or its tetraacyldisaccharide-1,4'-bisphosphate precursor, lipid IVA. Using a strain that o ... >> More
The enzyme 3-deoxy-D-manno-octulosonic acid (Kdo) transferase is encoded by the kdtA gene of Escherichia coli and plays a key role in lipopolysaccharide biosynthesis. It transfers Kdo from CMP-Kdo to lipid A or its tetraacyldisaccharide-1,4'-bisphosphate precursor, lipid IVA. Using a strain that overproduces the transferase approximately 500-fold, we have purified the enzyme to near homogeneity. The subunit molecular mass is approximately 43 kDa. Activity is stimulated by Triton X-100, is maximal at pH 7, but does not require Mg2+. The apparent Km values for lipid IVA and CMP-Kdo are 52 and 88 microM, respectively. Vmax is 15-18 mumol/min/mg when both substrates are added near saturation at pH 8. The purified enzyme transfers 2 Kdo residues to lipid A precursors or analogs bearing four to six fatty acyl chains and a 4'-monosphosphate moiety. Activity is inhibited by polymixin B and Re endotoxin. At low Kdo concentrations small amounts of the intermediate, (Kdo)1-IVA, accumulate. When this substance is isolated and incubated with purified enzyme in the presence of CMP-Kdo, it is converted to (Kdo)2-IVA. Formation of (Kdo)1-IVA is also observed when purified enzyme is incubated with (Kdo)2-IVA and 5 mM CMP, demonstrating that Kdo transfer is reversible. In summary, Kdo transferase consists of a single bifunctional polypeptide that incorporates the 2 innermost Kdo residues common to all lipopolysaccharide molecules in E. coli. << Less
J. Biol. Chem. 267:9988-9997(1992) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.
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Comparative analyses of secondary gene products of 3-deoxy-D-manno-oct-2-ulosonic acid transferases from Chlamydiaceae in Escherichia coli K-12.
Brabetz W., Lindner B., Brade H.
The waaA gene encoding the essential, lipopolysaccharide (LPS)-specific 3-deoxy-Dmanno-oct-2-ulosonic acid (Kdo) transferase was inactivated in the chromosome of a heptosyltransferase I and II deficient Escherichia coli K-12 strain by insertion of gene expression cassettes encoding the waaA genes ... >> More
The waaA gene encoding the essential, lipopolysaccharide (LPS)-specific 3-deoxy-Dmanno-oct-2-ulosonic acid (Kdo) transferase was inactivated in the chromosome of a heptosyltransferase I and II deficient Escherichia coli K-12 strain by insertion of gene expression cassettes encoding the waaA genes of Chlamydia trachomatis, Chlamydophila pneumoniae or Chlamydophila psittaci. The three chlamydial Kdo transferases were able to complement the knockout mutation without changing the growth or multiplication behaviour. The LPS of the mutants were serologically and structurally characterized in comparison to the LPS of the parent strain using compositional analyses, high performance anion exchange chromatography, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and specific monoclonal antibodies. The data show that chlamydial Kdo transferases can replace in E. coli K-12 the host's Kdo transferase and retain the product specificities described in their natural background. In addition, we unequivocally proved that WaaA from C. psittaci transfers predominantly four Kdo residues to lipid A, forming a branched tetrasaccharide with the structure alpha-Kdo-(2-->8)-[alpha-Kdo-(2-->4)]-alpha-Kdo-(2-->4)-alpha-Kdo. << Less
Eur. J. Biochem. 267:5458-5465(2000) [PubMed] [EuropePMC]
This publication is cited by 9 other entries.
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A novel 3-deoxy-D-manno-octulosonic acid transferase from Chlamydia trachomatis required for expression of the genus-specific epitope.
Belunis C.J., Mdluli K.E., Raetz C.R.H., Nano F.E.
DNA cloned from Chlamydia trachomatis is able to direct the formation of the genus-specific lipopolysaccharide epitope of chlamydiae in enteric Gram-negative bacteria. We now demonstrate that a single C. trachomatis gene (gseA) is sufficient to impart this trait to Escherichia coli. The deduced am ... >> More
DNA cloned from Chlamydia trachomatis is able to direct the formation of the genus-specific lipopolysaccharide epitope of chlamydiae in enteric Gram-negative bacteria. We now demonstrate that a single C. trachomatis gene (gseA) is sufficient to impart this trait to Escherichia coli. The deduced amino acid sequence of gseA shows 23% identity (66% similarity) to kdtA, an E. coli gene that codes for a bifunctional enzyme catalyzing the addition of two 3-deoxy-D-manno-octulosonic acid (Kdo) residues to lipid A precursors (Clementz, T., and Raetz, C. R. H. (1991) J. Biol. Chem. 266, 9687-9696). Extracts of E. coli expressing gseA transfer at least one additional Kdo unit from CMP-Kdo to precursors already bearing the two Kdo residues attached by the kdtA gene product. Introduction of gseA into an E. coli mutant with a thermolabile kdtA gene product endows cell extracts with the ability to transfer not only the third but also the first two Kdos to lipid A precursors, demonstrating that the C. trachomatis enzyme is at least trifunctional. Given the similarities of these two Kdo transferases and the essentiality of Kdo in Gram-negative bacteria, lipopolysaccharide biosynthesis may be a target for development of novel drugs effective against chlamydiae. << Less
J. Biol. Chem. 267:18702-18707(1992) [PubMed] [EuropePMC]
This publication is cited by 5 other entries.