1tsl: Difference between revisions
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[[Image:1tsl.gif|left|200px]] | [[Image:1tsl.gif|left|200px]] | ||
'''L. CASEI THYMIDYLATE SYNTHASE WITH SPECIES SPECIFIC INHIBITOR''' | {{Structure | ||
|PDB= 1tsl |SIZE=350|CAPTION= <scene name='initialview01'>1tsl</scene>, resolution 2.50Å | |||
|SITE= <scene name='pdbsite=CAT:Active+Site+CYS'>CAT</scene> | |||
|LIGAND= <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene> and <scene name='pdbligand=A15:3'-3 -DICHLOROPHENOL-1,8-3H-BENZO[DE]ISOCHROMEN-1-ONE'>A15</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Thymidylate_synthase Thymidylate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.45 2.1.1.45] | |||
|GENE= | |||
}} | |||
'''L. CASEI THYMIDYLATE SYNTHASE WITH SPECIES SPECIFIC INHIBITOR''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1TSL is a [ | 1TSL is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Lactobacillus_casei Lactobacillus casei]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TSL OCA]. | ||
==Reference== | ==Reference== | ||
Structure-based design of inhibitors specific for bacterial thymidylate synthase., Stout TJ, Tondi D, Rinaldi M, Barlocco D, Pecorari P, Santi DV, Kuntz ID, Stroud RM, Shoichet BK, Costi MP, Biochemistry. 1999 Feb 2;38(5):1607-17. PMID:[http:// | Structure-based design of inhibitors specific for bacterial thymidylate synthase., Stout TJ, Tondi D, Rinaldi M, Barlocco D, Pecorari P, Santi DV, Kuntz ID, Stroud RM, Shoichet BK, Costi MP, Biochemistry. 1999 Feb 2;38(5):1607-17. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9931028 9931028] | ||
[[Category: Lactobacillus casei]] | [[Category: Lactobacillus casei]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: structure-based drug design]] | [[Category: structure-based drug design]] | ||
''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 14:22:38 2008'' | ||
Revision as of 15:22, 20 March 2008
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| , resolution 2.50Å | |||||||
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| Sites: | |||||||
| Ligands: | and | ||||||
| Activity: | Thymidylate synthase, with EC number 2.1.1.45 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
L. CASEI THYMIDYLATE SYNTHASE WITH SPECIES SPECIFIC INHIBITOR
OverviewOverview
Thymidylate synthase is an attractive target for antiproliferative drug design because of its key role in the synthesis of DNA. As such, the enzyme has been widely targeted for anticancer applications. In principle, TS should also be a good target for drugs used to fight infectious disease. In practice, TS is highly conserved across species, and it has proven to be difficult to develop inhibitors that are selective for microbial TS enzymes over the human enzyme. Using the structure of TS from Lactobacillus casei in complex with the nonsubstrate analogue phenolphthalein, inhibitors were designed to take advantage of features of the bacterial enzyme that differ from those of the human enzyme. Upon synthesis and testing, these inhibitors were found to be up to 40-fold selective for the bacterial enzyme over the human enzyme. The crystal structures of two of these inhibitors in complex with TS suggested the design of further compounds. Subsequent synthesis and testing showed that these second-round compounds inhibit the bacterial enzyme at sub-micromolar concentrations, while the human enzyme was not inhibited at detectable levels (selectivities of 100-1000-fold or greater). Although these inhibitors share chemical similarities, X-ray crystal structures reveal that the analogues bind to the enzyme in substantially different orientations. Site-directed mutagenesis experiments suggest that the individual inhibitors may adopt multiple configurations in their complexes with TS.
About this StructureAbout this Structure
1TSL is a Single protein structure of sequence from Lactobacillus casei. Full crystallographic information is available from OCA.
ReferenceReference
Structure-based design of inhibitors specific for bacterial thymidylate synthase., Stout TJ, Tondi D, Rinaldi M, Barlocco D, Pecorari P, Santi DV, Kuntz ID, Stroud RM, Shoichet BK, Costi MP, Biochemistry. 1999 Feb 2;38(5):1607-17. PMID:9931028
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