2bi7: Difference between revisions
New page: left|200px<br /> <applet load="2bi7" size="450" color="white" frame="true" align="right" spinBox="true" caption="2bi7, resolution 2.00Å" /> '''UDP-GALACTOPYRANOSE... |
No edit summary |
||
| (24 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
== | ==udp-galactopyranose mutase from Klebsiella pneumoniae oxidised FAD== | ||
Uridine diphosphogalactofuranose (UDP-Galf) is the precursor of the | <StructureSection load='2bi7' size='340' side='right'caption='[[2bi7]], [[Resolution|resolution]] 2.00Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2bi7]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Klebsiella_pneumoniae Klebsiella pneumoniae]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1usj 1usj]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BI7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2BI7 FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene></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=2bi7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bi7 OCA], [https://pdbe.org/2bi7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2bi7 RCSB], [https://www.ebi.ac.uk/pdbsum/2bi7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2bi7 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/GLF1_KLEPN GLF1_KLEPN] Involved in the biosynthesis of the galactose-containing O-side-chain polysaccharide backbone structure of D-galactan I which is a key component of lipopolysaccharide (LPS). Catalyzes the interconversion through a 2-keto intermediate of uridine diphosphogalactopyranose (UDP-GalP) into uridine diphosphogalactofuranose (UDP-GalF) which is the biosynthetic precursor of galactofuranosyl residues.<ref>PMID:9020123</ref> | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bi/2bi7_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2bi7 ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Uridine diphosphogalactofuranose (UDP-Galf) is the precursor of the d-galactofuranose sugar found in bacterial and parasitic cell walls, including those of many pathogens. UDP-Galf is made from UDP-galactopyranose by the enzyme UDP-galactopyranose mutase. The enzyme requires the reduced FADH- co-factor for activity. The structure of the Mycobacterium tuberculosis mutase with FAD has been determined to 2.25 A. The structures of Klebsiella pneumoniae mutase with FAD and with FADH- bound have been determined to 2.2 A and 2.35 A resolution, respectively. This is the first report of the FADH(-)-containing structure. Two flavin-dependent mechanisms for the enzyme have been proposed, one, which involves a covalent adduct being formed at the flavin and the other based on electron transfer. Using our structural data, we have examined the two mechanisms. The electron transfer mechanism is consistent with the structural data, not surprisingly, since it makes fewer demands on the precise positioning of atoms. A model based on a covalent adduct FAD requires repositioning of the enzyme active site and would appear to require the isoalloxazine ring of FADH- to buckle in a particular way. However, the FADH- structure reveals that the isoalloxazine ring buckles in the opposite sense, this apparently requires the covalent adduct to trigger profound conformational changes in the protein or to buckle the FADH- opposite to that seen in the apo structure. | |||
Crystal structures of Mycobacteria tuberculosis and Klebsiella pneumoniae UDP-galactopyranose mutase in the oxidised state and Klebsiella pneumoniae UDP-galactopyranose mutase in the (active) reduced state.,Beis K, Srikannathasan V, Liu H, Fullerton SW, Bamford VA, Sanders DA, Whitfield C, McNeil MR, Naismith JH J Mol Biol. 2005 May 13;348(4):971-82. PMID:15843027<ref>PMID:15843027</ref> | |||
== | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | |||
<div class="pdbe-citations 2bi7" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[UDP-galactopyranose mutase|UDP-galactopyranose mutase]] | |||
*[[UDP-galactopyranose mutase 3D structures|UDP-galactopyranose mutase 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Klebsiella pneumoniae]] | [[Category: Klebsiella pneumoniae]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Beis | [[Category: Beis K]] | ||
[[Category: Naismith | [[Category: Naismith J]] | ||
[[Category: Srikannathasan | [[Category: Srikannathasan V]] | ||
