2bpq

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[[Image:2bpq.gif|left|200px]]
[[Image:2bpq.gif|left|200px]]
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{{Structure
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<!--
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|PDB= 2bpq |SIZE=350|CAPTION= <scene name='initialview01'>2bpq</scene>, resolution 1.90&Aring;
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The line below this paragraph, containing "STRUCTURE_2bpq", creates the "Structure Box" on the page.
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|SITE= <scene name='pdbsite=AC1:Gol+Binding+Site+For+Chain+A'>AC1</scene>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=BEN:BENZAMIDINE'>BEN</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Anthranilate_phosphoribosyltransferase Anthranilate phosphoribosyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.2.18 2.4.2.18] </span>
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or leave the SCENE parameter empty for the default display.
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|GENE=
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-->
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|DOMAIN=<span class='plainlinks'>[http://www.ncbi.nlm.nih.gov/Structure/cdd/cddsrv.cgi?uid=PRK00188 trpD], [http://www.ncbi.nlm.nih.gov/Structure/cdd/cddsrv.cgi?uid=pfam02885 Glycos_trans_3N], [http://www.ncbi.nlm.nih.gov/Structure/cdd/cddsrv.cgi?uid=pfam00591 Glycos_transf_3]</span>
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{{STRUCTURE_2bpq| PDB=2bpq | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2bpq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bpq OCA], [http://www.ebi.ac.uk/pdbsum/2bpq PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2bpq RCSB]</span>
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}}
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'''ANTHRANILATE PHOSPHORIBOSYLTRANSFERASE (TRPD) FROM MYCOBACTERIUM TUBERCULOSIS (APO STRUCTURE)'''
'''ANTHRANILATE PHOSPHORIBOSYLTRANSFERASE (TRPD) FROM MYCOBACTERIUM TUBERCULOSIS (APO STRUCTURE)'''
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[[Category: Lott, J S.]]
[[Category: Lott, J S.]]
[[Category: TBSGC, TB Structural Genomics Consortium.]]
[[Category: TBSGC, TB Structural Genomics Consortium.]]
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[[Category: amino-acid biosynthesis]]
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[[Category: Amino-acid biosynthesis]]
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[[Category: anthranilate]]
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[[Category: Anthranilate]]
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[[Category: aromatic amino acid biosynthesis]]
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[[Category: Aromatic amino acid biosynthesis]]
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[[Category: glycosyltransferase]]
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[[Category: Glycosyltransferase]]
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[[Category: protein structure initiative]]
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[[Category: Protein structure initiative]]
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[[Category: psi]]
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[[Category: Psi]]
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[[Category: psi,protein structure initiative,tb structural genomics consortium]]
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[[Category: Psi,protein structure initiative,tb structural genomics consortium]]
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[[Category: structural genomic]]
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[[Category: Structural genomic]]
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[[Category: tb structural genomics consortium]]
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[[Category: Tb structural genomics consortium]]
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[[Category: tbsgc]]
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[[Category: Tbsgc]]
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[[Category: transferase phosphoribosyltransferase]]
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[[Category: Transferase phosphoribosyltransferase]]
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[[Category: tryptophan biosynthesis]]
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[[Category: Tryptophan biosynthesis]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 20:37:24 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 02:09:54 2008''
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Revision as of 17:37, 3 May 2008

Image:2bpq.gif

Template:STRUCTURE 2bpq

ANTHRANILATE PHOSPHORIBOSYLTRANSFERASE (TRPD) FROM MYCOBACTERIUM TUBERCULOSIS (APO STRUCTURE)


Overview

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.

About this Structure

2BPQ is a Single protein structure of sequence from Mycobacterium tuberculosis. Full crystallographic information is available from OCA.

Reference

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 Page seeded by OCA on Sat May 3 20:37:24 2008

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