1u2q
From Proteopedia
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| - | [[Image:1u2q.gif|left|200px]] | + | [[Image:1u2q.gif|left|200px]] |
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| - | '''Crystal structure of Mycobacterium tuberculosis Low Molecular Weight Protein Tyrosine Phosphatase (MPtpA) at 2.5A resolution with glycerol in the active site''' | + | {{Structure |
| + | |PDB= 1u2q |SIZE=350|CAPTION= <scene name='initialview01'>1u2q</scene>, resolution 2.50Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene> and <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene> | ||
| + | |ACTIVITY= [http://en.wikipedia.org/wiki/Protein-tyrosine-phosphatase Protein-tyrosine-phosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.48 3.1.3.48] | ||
| + | |GENE= MPTPA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1773 Mycobacterium tuberculosis]) | ||
| + | }} | ||
| + | |||
| + | '''Crystal structure of Mycobacterium tuberculosis Low Molecular Weight Protein Tyrosine Phosphatase (MPtpA) at 2.5A resolution with glycerol in the active site''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1U2Q is a [ | + | 1U2Q is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Mycobacterium_tuberculosis Mycobacterium tuberculosis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1U2Q OCA]. |
==Reference== | ==Reference== | ||
| - | Crystal structure of low-molecular-weight protein tyrosine phosphatase from Mycobacterium tuberculosis at 1.9-A resolution., Madhurantakam C, Rajakumara E, Mazumdar PA, Saha B, Mitra D, Wiker HG, Sankaranarayanan R, Das AK, J Bacteriol. 2005 Mar;187(6):2175-81. PMID:[http:// | + | Crystal structure of low-molecular-weight protein tyrosine phosphatase from Mycobacterium tuberculosis at 1.9-A resolution., Madhurantakam C, Rajakumara E, Mazumdar PA, Saha B, Mitra D, Wiker HG, Sankaranarayanan R, Das AK, J Bacteriol. 2005 Mar;187(6):2175-81. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15743966 15743966] |
[[Category: Mycobacterium tuberculosis]] | [[Category: Mycobacterium tuberculosis]] | ||
[[Category: Protein-tyrosine-phosphatase]] | [[Category: Protein-tyrosine-phosphatase]] | ||
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[[Category: tyrosine phosphatase]] | [[Category: tyrosine phosphatase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 14:26:33 2008'' |
Revision as of 12:26, 20 March 2008
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| , resolution 2.50Å | |||||||
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| Ligands: | and | ||||||
| Gene: | MPTPA (Mycobacterium tuberculosis) | ||||||
| Activity: | Protein-tyrosine-phosphatase, with EC number 3.1.3.48 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of Mycobacterium tuberculosis Low Molecular Weight Protein Tyrosine Phosphatase (MPtpA) at 2.5A resolution with glycerol in the active site
Overview
The low-molecular-weight protein tyrosine phosphatase (LMWPTPase) belongs to a distinctive class of phosphotyrosine phosphatases widely distributed among prokaryotes and eukaryotes. We report here the crystal structure of LMWPTPase of microbial origin, the first of its kind from Mycobacterium tuberculosis. The structure was determined to be two crystal forms at 1.9- and 2.5-A resolutions. These structural forms are compared with those of the LMWPTPases of eukaryotes. Though the overall structure resembles that of the eukaryotic LMWPTPases, there are significant changes around the active site and the protein tyrosine phosphatase (PTP) loop. The variable loop forming the wall of the crevice leading to the active site is conformationally unchanged from that of mammalian LMWPTPase; however, differences are observed in the residues involved, suggesting that they have a role in influencing different substrate specificities. The single amino acid substitution (Leu12Thr [underlined below]) in the consensus sequence of the PTP loop, CTGNICRS, has a major role in the stabilization of the PTP loop, unlike what occurs in mammalian LMWPTPases. A chloride ion and a glycerol molecule were modeled in the active site where the chloride ion interacts in a manner similar to that of phosphate with the main chain nitrogens of the PTP loop. This structural study, in addition to identifying specific mycobacterial features, may also form the basis for exploring the mechanism of the substrate specificities of bacterial LMWPTPases.
About this Structure
1U2Q is a Single protein structure of sequence from Mycobacterium tuberculosis. Full crystallographic information is available from OCA.
Reference
Crystal structure of low-molecular-weight protein tyrosine phosphatase from Mycobacterium tuberculosis at 1.9-A resolution., Madhurantakam C, Rajakumara E, Mazumdar PA, Saha B, Mitra D, Wiker HG, Sankaranarayanan R, Das AK, J Bacteriol. 2005 Mar;187(6):2175-81. PMID:15743966
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