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==Anthranilate phosphoribosyltransferase (TrpD) from Mycobacterium tuberculosis (Apo structure)== | |||
<StructureSection load='2bpq' size='340' side='right'caption='[[2bpq]], [[Resolution|resolution]] 1.90Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2bpq]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis_H37Rv Mycobacterium tuberculosis H37Rv]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BPQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2BPQ 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]] 1.9Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BEN:BENZAMIDINE'>BEN</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</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=2bpq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bpq OCA], [https://pdbe.org/2bpq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2bpq RCSB], [https://www.ebi.ac.uk/pdbsum/2bpq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2bpq ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/TRPD_MYCTU TRPD_MYCTU] | |||
== 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/bp/2bpq_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=2bpq ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Mycobacterium tuberculosis, the cause of tuberculosis, presents a major threat to human health worldwide. Biosynthetic enzymes that are essential for the survival of the bacterium, especially in activated macrophages, are important potential drug targets. Although the tryptophan biosynthesis pathway is thought to be non-essential for many pathogens, this appears not to be the case for M.tuberculosis, where a trpD gene knockout fails to cause disease in mice. We therefore chose the product of the trpD gene, anthranilate phosphoribosyltransferase, which catalyses the second step in tryptophan biosynthesis, for structural analysis. The structure of TrpD from M.tuberculosis was solved by X-ray crystallography, at 1.9 A resolution for the native enzyme (R = 0.191, Rfree = 0.230) and at 2.3 A resolution for the complex with its substrate phosphoribosylpyrophosphate (PRPP) and Mg2+ (R = 0.194, Rfree = 0.255). The enzyme is folded into two domains, separated by a hinge region. PRPP binds in the C-terminal domain, together with a pair of Mg ions. In the substrate complex, two flexible loops change conformation compared with the apo protein, to close over the PRPP and to complete an extensive network of hydrogen-bonded interactions. A nearby pocket, adjacent to the hinge region, is postulated by in silico docking as the binding site for anthranilate. A bound molecule of benzamidine, which was essential for crystallization and is also found in the hinge region, appears to reduce flexibility between the two domains. | |||
The crystal structure of TrpD, a metabolic enzyme essential for lung colonization by Mycobacterium tuberculosis, in complex with its substrate phosphoribosylpyrophosphate.,Lee CE, Goodfellow C, Javid-Majd F, Baker EN, Shaun Lott J J Mol Biol. 2006 Jan 27;355(4):784-97. Epub 2005 Nov 22. PMID:16337227<ref>PMID:16337227</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2bpq" style="background-color:#fffaf0;"></div> | |||
== | ==See Also== | ||
*[[Phosphoribosyltransferase 3D structures|Phosphoribosyltransferase 3D structures]] | |||
[[Category: | == References == | ||
[[Category: Mycobacterium tuberculosis | <references/> | ||
__TOC__ | |||
[[Category: Baker | </StructureSection> | ||
[[Category: Goodfellow | [[Category: Large Structures]] | ||
[[Category: Javid-Majd | [[Category: Mycobacterium tuberculosis H37Rv]] | ||
[[Category: Lee | [[Category: Baker EN]] | ||
[[Category: Lott | [[Category: Goodfellow C]] | ||
[[Category: Javid-Majd F]] | |||
[[Category: Lee CE]] | |||
[[Category: Lott JS]] | |||
Latest revision as of 12:18, 9 May 2024
Anthranilate phosphoribosyltransferase (TrpD) from Mycobacterium tuberculosis (Apo structure)Anthranilate phosphoribosyltransferase (TrpD) from Mycobacterium tuberculosis (Apo structure)
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedMycobacterium tuberculosis, the cause of tuberculosis, presents a major threat to human health worldwide. Biosynthetic enzymes that are essential for the survival of the bacterium, especially in activated macrophages, are important potential drug targets. Although the tryptophan biosynthesis pathway is thought to be non-essential for many pathogens, this appears not to be the case for M.tuberculosis, where a trpD gene knockout fails to cause disease in mice. We therefore chose the product of the trpD gene, anthranilate phosphoribosyltransferase, which catalyses the second step in tryptophan biosynthesis, for structural analysis. The structure of TrpD from M.tuberculosis was solved by X-ray crystallography, at 1.9 A resolution for the native enzyme (R = 0.191, Rfree = 0.230) and at 2.3 A resolution for the complex with its substrate phosphoribosylpyrophosphate (PRPP) and Mg2+ (R = 0.194, Rfree = 0.255). The enzyme is folded into two domains, separated by a hinge region. PRPP binds in the C-terminal domain, together with a pair of Mg ions. In the substrate complex, two flexible loops change conformation compared with the apo protein, to close over the PRPP and to complete an extensive network of hydrogen-bonded interactions. A nearby pocket, adjacent to the hinge region, is postulated by in silico docking as the binding site for anthranilate. A bound molecule of benzamidine, which was essential for crystallization and is also found in the hinge region, appears to reduce flexibility between the two domains. The crystal structure of TrpD, a metabolic enzyme essential for lung colonization by Mycobacterium tuberculosis, in complex with its substrate phosphoribosylpyrophosphate.,Lee CE, Goodfellow C, Javid-Majd F, Baker EN, Shaun Lott J J Mol Biol. 2006 Jan 27;355(4):784-97. Epub 2005 Nov 22. PMID:16337227[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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