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| | ==Structural Basis for the Sugar Nucleotide and Acyl Chain Selectivity of Leptospira interrogans LpxA== | | ==Structural Basis for the Sugar Nucleotide and Acyl Chain Selectivity of Leptospira interrogans LpxA== |
| - | <StructureSection load='3hsq' size='340' side='right' caption='[[3hsq]], [[Resolution|resolution]] 2.10Å' scene=''> | + | <StructureSection load='3hsq' size='340' side='right'caption='[[3hsq]], [[Resolution|resolution]] 2.10Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3hsq]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/"leptospira_icteroides"_noguchi_1919 "leptospira icteroides" noguchi 1919]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3HSQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3HSQ FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3hsq]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/"leptospira_icteroides"_noguchi_1919 "leptospira icteroides" noguchi 1919]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3HSQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3HSQ FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">LA3949, LA_3949, lpxA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=173 "Leptospira icteroides" Noguchi 1919])</td></tr> | + | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">LA3949, LA_3949, lpxA ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=173 "Leptospira icteroides" Noguchi 1919])</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Acyl-[acyl-carrier-protein]--UDP-N-acetylglucosamine_O-acyltransferase Acyl-[acyl-carrier-protein]--UDP-N-acetylglucosamine O-acyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.129 2.3.1.129] </span></td></tr> | + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Acyl-[acyl-carrier-protein]--UDP-N-acetylglucosamine_O-acyltransferase Acyl-[acyl-carrier-protein]--UDP-N-acetylglucosamine O-acyltransferase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.129 2.3.1.129] </span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3hsq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3hsq OCA], [http://pdbe.org/3hsq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3hsq RCSB], [http://www.ebi.ac.uk/pdbsum/3hsq PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3hsq ProSAT]</span></td></tr> | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3hsq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3hsq OCA], [https://pdbe.org/3hsq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3hsq RCSB], [https://www.ebi.ac.uk/pdbsum/3hsq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3hsq ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/Q8EZA6_LEPIN Q8EZA6_LEPIN]] Involved in the biosynthesis of lipid A, a phosphorylated glycolipid that anchors the lipopolysaccharide to the outer membrane of the cell.[SAAS:SAAS00064151] | + | [[https://www.uniprot.org/uniprot/Q8EZA6_LEPIN Q8EZA6_LEPIN]] Involved in the biosynthesis of lipid A, a phosphorylated glycolipid that anchors the lipopolysaccharide to the outer membrane of the cell.[SAAS:SAAS00064151] |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Leptospira icteroides noguchi 1919]] | | [[Category: Leptospira icteroides noguchi 1919]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Raetz, C R]] | | [[Category: Raetz, C R]] |
| | [[Category: Robins, L I]] | | [[Category: Robins, L I]] |
| Structural highlights
Function
[Q8EZA6_LEPIN] Involved in the biosynthesis of lipid A, a phosphorylated glycolipid that anchors the lipopolysaccharide to the outer membrane of the cell.[SAAS:SAAS00064151]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The first step of lipid A biosynthesis is catalyzed by LpxA in Escherichia coli (EcLpxA), an acyltransferase selective for UDP-GlcNAc and R-3-hydroxymyristoyl-acyl carrier protein (ACP). Leptospira interrogans LpxA (LiLpxA) is extremely selective for R-3-hydroxylauroyl-ACP and an analogue of UDP-GlcNAc, designated UDP-GlcNAc3N, in which NH(2) replaces the GlcNAc 3-OH group. EcLpxA does not discriminate between UDP-GlcNAc and UDP-GlcNAc3N; however, E. coli does not make UDP-GlcNAc3N. With LiLpxA, R-3-hydroxylauroyl-methylphosphopantetheine efficiently substitutes for R-3-hydroxylauroyl-ACP. We now present crystal structures of free LiLpxA and its complexes with its product UDP-3-N-(R-3-hydroxylauroyl)-GlcNAc3N and with its substrate R-3-hydroxylauroyl-methylphosphopantetheine. The positions of the acyl chains of the R-3-hydroxylauroyl-methylphosphopantetheine and the UDP-3-N-(R-3-hydroxylauroyl)-GlcNAc3N are almost identical and are similar to that of the acyl chain in the EcLpxA/UDP-3-O-(R-3-hydroxymyristoyl)-GlcNAc complex. The selectivity of LiLpxA for UDP-GlcNAc3N may be explained by the orientation of the backbone carbonyl group of Q68, which differs by approximately 82 degrees from the corresponding Q73 carbonyl group in EcLpxA. This arrangement provides an extra hydrogen-bond acceptor for the 3-NH(2) group of UDP-GlcNAc3N in LiLpxA. The R-3-hydroxylauroyl selectivity of LiLpxA is explained by the position of the K171 side chain, which limits the length of the acyl-chain-binding groove. Our results support the role of LiLpxA H120 (which corresponds to EcLpxA H125) as the catalytic base and provide the first structural information about the orientation of the phosphopantetheine moiety during LpxA catalysis.
Structural basis for the sugar nucleotide and acyl-chain selectivity of Leptospira interrogans LpxA.,Robins LI, Williams AH, Raetz CR Biochemistry. 2009 Jul 7;48(26):6191-201. PMID:19456129[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Robins LI, Williams AH, Raetz CR. Structural basis for the sugar nucleotide and acyl-chain selectivity of Leptospira interrogans LpxA. Biochemistry. 2009 Jul 7;48(26):6191-201. PMID:19456129 doi:10.1021/bi900629e
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