Enzymes
| UniProtKB help_outline | 7,477 proteins |
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- Name help_outline ADP-L-glycero-β-D-manno-heptose Identifier CHEBI:61506 Charge -2 Formula C17H25N5O16P2 InChIKeyhelp_outline KMSFWBYFWSKGGR-DTBZDYEHSA-L SMILEShelp_outline [H][C@@]1(O[C@@H](OP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)n2cnc3c(N)ncnc23)[C@@H](O)[C@@H](O)[C@@H]1O)[C@@H](O)CO 2D coordinates Mol file for the small molecule Search links Involved in 10 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 A Identifier CHEBI:176431 Charge -6 Formula C42H54N2O39P2R6 SMILEShelp_outline [C@H]1(OP(=O)([O-])[O-])[C@H](OC(=O)C[C@@H](*)OC(*)=O)[C@@H](NC(=O)C[C@@H](*)OC(=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 9 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline ADP Identifier CHEBI:456216 (Beilstein: 3783669) help_outline Charge -3 Formula C10H12N5O10P2 InChIKeyhelp_outline XTWYTFMLZFPYCI-KQYNXXCUSA-K SMILEShelp_outline Nc1ncnc2n(cnc12)[C@@H]1O[C@H](COP([O-])(=O)OP([O-])([O-])=O)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 835 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline an L-α-D-Hep-(1→5)-[α-Kdo-(2→4)]-α-Kdo-(2→6)-lipid A Identifier CHEBI:193068 Charge -6 Formula C49H66N2O45P2R6 SMILEShelp_outline [C@H]1([C@H]([C@H]([C@@H]([C@](O1)([C@H](CO)O)[H])O)O)O)O[C@@H]2[C@@H](C[C@](O[C@@]2([C@@H](CO)O)[H])(OC[C@@H]3[C@@H](OP(=O)([O-])[O-])[C@H](OC(=O)C[C@@H](*)OC(=O)*)[C@@H](NC(=O)C[C@@H](*)OC(=O)*)[C@H](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)O3)C([O-])=O)O[C@]5(C([O-])=O)C[C@@H](O)[C@H]([C@](O5)([C@H](O)CO)[H])O 2D coordinates Mol file for the small molecule Search links Involved in 4 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 9,176 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:74067 | RHEA:74068 | RHEA:74069 | RHEA:74070 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Related reactions help_outline
Specific form(s) of this reaction
Publications
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Structure of the Escherichia coli heptosyltransferase WaaC: binary complexes with ADP and ADP-2-deoxy-2-fluoro heptose.
Grizot S., Salem M., Vongsouthi V., Durand L., Moreau F., Dohi H., Vincent S., Escaich S., Ducruix A.
Lipopolysaccharides constitute the outer leaflet of the outer membrane of Gram-negative bacteria and are therefore essential for cell growth and viability. The heptosyltransferase WaaC is a glycosyltransferase (GT) involved in the synthesis of the inner core region of LPS. It catalyzes the additio ... >> More
Lipopolysaccharides constitute the outer leaflet of the outer membrane of Gram-negative bacteria and are therefore essential for cell growth and viability. The heptosyltransferase WaaC is a glycosyltransferase (GT) involved in the synthesis of the inner core region of LPS. It catalyzes the addition of the first L-glycero-D-manno-heptose (heptose) molecule to one 3-deoxy-D-manno-oct-2-ulosonic acid (Kdo) residue of the Kdo2-lipid A molecule. Heptose is an essential component of the LPS core domain; its absence results in a truncated lipopolysaccharide associated with the deep-rough phenotype causing a greater susceptibility to antibiotic and an attenuated virulence for pathogenic Gram-negative bacteria. Thus, WaaC represents a promising target in antibacterial drug design. Here, we report the structure of WaaC from the Escherichia coli pathogenic strain RS218 alone at 1.9 A resolution, and in complex with either ADP or the non-cleavable analog ADP-2-deoxy-2-fluoro-heptose of the sugar donor at 2.4 A resolution. WaaC adopts the GT-B fold in two domains, characteristic of one glycosyltransferase structural superfamily. The comparison of the three different structures shows that WaaC does not undergo a domain rotation, characteristic of the GT-B family, upon substrate binding, but allows the substrate analog and the reaction product to adopt remarkably distinct conformations inside the active site. In addition, both binary complexes offer a close view of the donor subsite and, together with results from site-directed mutagenesis studies, provide evidence for a model of the catalytic mechanism. << Less
J. Mol. Biol. 363:383-394(2006) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.
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Characterization of the physiological substrate for lipopolysaccharide heptosyltransferases I and II.
Gronow S., Oertelt C., Ervelae E., Zamyatina A., Kosma P., Skurnik M., Holst O.
L-Glycero-D-manno-heptopyranose is a characteristic compound of many lipopolysaccharide (LPS) core structures of Gram-negative bacteria. In Escherichia coli two heptosyltransferases, namely WaaC and WaaF, are known to transfer L-glycero-D-manno-heptopyranose to Re-LPS and Rd(2)-LPS, respectively. ... >> More
L-Glycero-D-manno-heptopyranose is a characteristic compound of many lipopolysaccharide (LPS) core structures of Gram-negative bacteria. In Escherichia coli two heptosyltransferases, namely WaaC and WaaF, are known to transfer L-glycero-D-manno-heptopyranose to Re-LPS and Rd(2)-LPS, respectively. It had been proposed that both reactions involve ADPL-glycero-D-manno-heptose as a sugar donor; however, the structure of this nucleotide sugar had never been completely elucidated. In the present study, ADPL-glycero-D-manno-heptose was isolated from a heptosyltransferase-deficient E. coli mutant, and its structure was determined by nuclear magnetic resonance spectroscopy and matrix-assisted laser-desorption/ionization time-of-flight mass spectrometry as ADPL-glycero-beta-D-manno-heptopyranose. This compound represented the sole constituent of the bacterial extract that was accepted as a sugar donor by heptosyltransferases I and II in vitro. << Less
J. Endotoxin Res. 7:263-270(2001) [PubMed] [EuropePMC]
This publication is cited by 3 other entries.
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Enzymatic synthesis of lipopolysaccharide in Escherichia coli. Purification and properties of heptosyltransferase i.
Kadrmas J.L., Raetz C.R.
Heptosyltransferase I, encoded by the rfaC(waaC) gene of Escherichia coli, is thought to add L-glycero-D-manno-heptose to the inner 3-deoxy-D-manno-octulosonic acid (Kdo) residue of the lipopolysaccharide core. Lipopolysaccharide isolated from mutants defective in rfaC lack heptose and all other s ... >> More
Heptosyltransferase I, encoded by the rfaC(waaC) gene of Escherichia coli, is thought to add L-glycero-D-manno-heptose to the inner 3-deoxy-D-manno-octulosonic acid (Kdo) residue of the lipopolysaccharide core. Lipopolysaccharide isolated from mutants defective in rfaC lack heptose and all other sugars distal to heptose. The putative donor, ADP-L-glycero-D-manno-heptose, has never been fully characterized and is not readily available. In cell extracts, the analog ADP-mannose can serve as an alternative donor for RfaC-catalyzed glycosylation of the acceptor, Kdo2-lipid IVA. Using a T7 promoter construct that overexpresses RfaC approximately 15,000-fold, the enzyme has been purified to near homogeneity. NH2-terminal sequencing confirms that the purified enzyme is the rfaC gene product. The subunit molecular mass is 36 kDa. Enzymatic activity is dependent upon the presence of Triton X-100 and is maximal at pH 7.5. The apparent Km (determined at near saturating concentrations of the second substrate) is 1.5 mM for ADP-mannose and 4.5 microM for Kdo2-lipid IVA. Chemical hydrolysis of the RfaC reaction product at 100 degrees C in the presence of sodium acetate and 1% sodium dodecyl sulfate generates fragments consistent with the inner Kdo residue of Kdo2-lipid IVA as the site of mannosylation. The analog, Kdo-lipid IVA, functions as an acceptor, but is mannosylated at less than 1% the rate of Kdo2-lipid IVA. The purified enzyme displays no activity with ADP-glucose, GDP-mannose, UDP-glucose, or UDP-galactose. Mannosylation of Kdo2-lipid IVA catalyzed by RfaC proceeds in high yield and may be useful for the synthesis of lipopolysaccharide analogs. Pure RfaC can also be used together with Kdo2-[4'-32P]lipid IVA to assay for the physiological donor (presumably ADP-L-glycero-D-manno-heptose) in a crude, low molecular weight fraction isolated from wild type cells. << Less
J. Biol. Chem. 273:2799-2807(1998) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.