Enzymes
| UniProtKB help_outline | 1 proteins |
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- Name help_outline chloroorienticin B Identifier CHEBI:75963 Charge 1 Formula C66H76Cl2N9O24 InChIKeyhelp_outline ATHQCOUEZPBNLP-JWYJDYCQSA-O SMILEShelp_outline C[NH2+][C@H](CC(C)C)C(=O)N[C@@H]1[C@H](O)c2ccc(Oc3cc4cc(Oc5ccc(cc5Cl)[C@@H](O[C@H]5C[C@](C)([NH3+])[C@@H](O)[C@H](C)O5)[C@@H]5NC(=O)[C@H](NC(=O)[C@@H]4NC(=O)[C@H](CC(N)=O)NC1=O)c1ccc(O)c(c1)-c1c(O)cc(O)cc1[C@H](NC5=O)C([O-])=O)c3O[C@@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O)c(Cl)c2 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 dTDP-β-L-vancosamine Identifier CHEBI:76839 Charge -1 Formula C17H28N3O13P2 InChIKeyhelp_outline HRODALWRJULFHW-SWNFMPTGSA-M SMILEShelp_outline C[C@@H]1O[C@@H](C[C@](C)([NH3+])[C@@H]1O)OP([O-])(=O)OP([O-])(=O)OC[C@H]1O[C@H](C[C@@H]1O)n1cc(C)c(=O)[nH]c1=O 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 chloroeremomycin Identifier CHEBI:85488 Charge 2 Formula C73H90Cl2N10O26 InChIKeyhelp_outline XJHXLMVKYIVZTE-LOALFDMRSA-P SMILEShelp_outline C[NH2+][C@H](CC(C)C)C(=O)N[C@@H]1[C@H](O)c2ccc(Oc3cc4cc(Oc5ccc(cc5Cl)[C@@H](O[C@H]5C[C@](C)([NH3+])[C@@H](O)[C@H](C)O5)[C@@H]5NC(=O)[C@H](NC(=O)[C@@H]4NC(=O)[C@H](CC(N)=O)NC1=O)c1ccc(O)c(c1)-c1c(O)cc(O)cc1[C@H](NC5=O)C([O-])=O)c3O[C@@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O[C@H]1C[C@](C)([NH3+])[C@@H](O)[C@H](C)O1)c(Cl)c2 2D coordinates Mol file for the small molecule Search links Involved in 1 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline dTDP Identifier CHEBI:58369 Charge -3 Formula C10H13N2O11P2 InChIKeyhelp_outline UJLXYODCHAELLY-XLPZGREQSA-K SMILEShelp_outline Cc1cn([C@H]2C[C@H](O)[C@@H](COP([O-])(=O)OP([O-])([O-])=O)O2)c(=O)[nH]c1=O 2D coordinates Mol file for the small molecule Search links Involved in 32 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 9,521 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:45908 | RHEA:45909 | RHEA:45910 | RHEA:45911 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
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Publications
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Characterization of a regiospecific epivancosaminyl transferase GtfA and enzymatic reconstitution of the antibiotic chloroeremomycin.
Lu W., Oberthuer M., Leimkuhler C., Tao J., Kahne D., Walsh C.T.
Chloroeremomycin, a vancomycin family glycopeptide antibiotic has three sugars, one D-glucose and two L-4-epi-vancosamines, attached to the crosslinked heptapeptide backbone by three glycosyltransferases, GtfA, -B, and -C. Prior efforts have revealed that GtfB and -C in tandem build an epivancosam ... >> More
Chloroeremomycin, a vancomycin family glycopeptide antibiotic has three sugars, one D-glucose and two L-4-epi-vancosamines, attached to the crosslinked heptapeptide backbone by three glycosyltransferases, GtfA, -B, and -C. Prior efforts have revealed that GtfB and -C in tandem build an epivancosaminyl-1,2-glucosyldisaccharide chain on residue 4 of the aglycone; however, the characterization of GtfA and glycosylation sequence of chloroeremomycin have been lacking. Here, we report the expression and purification of GtfA, as well as synthesis of its sugar donor, 2'-deoxy-thymidine 5'-diphosphate (dTDP)-beta-L-4-epi-vancosamine. GtfA transfers 4-epi-vancosamine from the chemically synthesized dTDP-4-epi-vancosamine to the beta-OH-Tyr6 residue of the aglycone, preferentially after GtfB action, to generate chloroorienticin B. With the preferred kinetic order of GtfB, then GtfA, then GtfC established, we have succeeded in reconstitution of chloroeremomycin from the heptapeptide aglycone by the sequential actions of the three enzymes. << Less
Proc. Natl. Acad. Sci. U.S.A. 101:4390-4395(2004) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.
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Tandem action of glycosyltransferases in the maturation of vancomycin and teicoplanin aglycones: novel glycopeptides.
Losey H.C., Peczuh M.W., Chen Z., Eggert U.S., Dong S.D., Pelczer I., Kahne D., Walsh C.T.
The glycopeptides vancomycin and teicoplanin are clinically important antibiotics. The carbohydrate portions of these molecules affect biological activity, and there is great interest in developing efficient strategies to make carbohydrate derivatives. To this end, genes encoding four glycosyltran ... >> More
The glycopeptides vancomycin and teicoplanin are clinically important antibiotics. The carbohydrate portions of these molecules affect biological activity, and there is great interest in developing efficient strategies to make carbohydrate derivatives. To this end, genes encoding four glycosyltransferases, GtfB, C, D, E, were subcloned from Amycolatopsis orientalis strains that produce chloroeremomycin (GtfB, C) or vancomycin (GtfD, E) into Escherichia coli. After expression and purification, each glycosyltransferase (Gtf) was characterized for activity either with the aglycones (GtfB, E) or the glucosylated derivatives (GtfC, D) of vancomycin and teicoplanin. GtfB efficiently glucosylates vancomycin aglycone using UDP-glucose as the glycosyl donor to form desvancosaminyl-vancomycin (vancomycin pseudoaglycone), with k(cat) of 17 min(-1), but has very low glucosylation activity, < or = 0.3 min(-1), for an alternate substrate, teicoplanin aglycone. In contrast, GtfE is much more efficient at glucosylating both its natural substrate, vancomycin aglycone (k(cat) = 60 min(-1)), and an unnatural substrate, teicoplanin aglycone (k(cat) = 20 min(-1)). To test the addition of the 4-epi-vancosamine moiety by GtfC and GtfD, synthesis of UDP-beta-L-4-epi-vancosamine was undertaken. This NDP-sugar served as a substrate for both GtfC and GtfD in the presence of vancomycin pseudoaglycone (GtfC and GtfD) or the glucosylated teicoplanin scaffold, 7 (GtfD). The GtfC product was the 4-epi-vancosaminyl form of vancomycin. Remarkably, GtfD was able to utilize both an unnatural acceptor, 7, and an unnatural nucleotide sugar donor, UDP-4-epi-vancosamine, to synthesize a novel hybrid teicoplanin/vancomycin glycopeptide. These results establish the enzymatic activity of these four Gtfs, begin to probe substrate specificity, and illustrate how they can be utilized to make variant sugar forms of both the vancomycin and the teicoplanin class of glycopeptide antibiotics. << Less
Biochemistry 40:4745-4755(2001) [PubMed] [EuropePMC]
This publication is cited by 3 other entries.