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2vos
From Proteopedia
| 2vos, resolution 2.00Å () | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Sites: | , , , , , , , , , , , , , and | ||||||||
| Ligands: | , , , | ||||||||
| Non-Standard Residues: | |||||||||
| Activity: | Tetrahydrofolate synthase, with EC number 6.3.2.17 | ||||||||
| Related: | 2vor | ||||||||
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||
MYCOBACTERIUM TUBERCULOSIS FOLYLPOLYGLUTAMATE SYNTHASE COMPLEXED WITH ADP
Folate derivatives are essential vitamins for cell growth and replication, primarily because of their central role in reactions of one-carbon metabolism. Folates require polyglutamation to be efficiently retained within the cell and folate-dependent enzymes have a higher affinity for the polyglutamylated forms of this cofactor. Polyglutamylation is dependent on the enzyme folylpolyglutamate synthetase (FPGS), which catalyzes the sequential addition of several glutamates to folate. FPGS is essential for the growth and survival of important bacterial species, including Mycobacterium tuberculosis, and is a potential drug target. Here, the crystal structures of M. tuberculosis FPGS in complex with ADP and AMPPCP are reported at 2.0 and 2.3 A resolution, respectively. The structures reveal a deeply buried nucleotide-binding site, as in the Escherichia coli and Lactobacillus casei FPGS structures, and a long extended groove for the binding of folate substrates. Differences from the E. coli and L. casei FPGS structures are seen in the binding of a key divalent cation, the carbamylation state of an essential lysine side chain and the adoption of an ;open' position by the active-site beta5-alpha6 loop. These changes point to coordinated events that are associated with dihydropteroate/folate binding and the catalysis of the new amide bond with an incoming glutamate residue.
Structures of Mycobacterium tuberculosisfolylpolyglutamate synthase complexed with ADP and AMPPCP., Young PG, Smith CA, Metcalf P, Baker EN, Acta Crystallogr D Biol Crystallogr. 2008 Jul;64(Pt 7):745-53. Epub 2008, Jun 18. PMID:18566510
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
2VOS is a 1 chain structure of sequence from Mycobacterium tuberculosis. Full crystallographic information is available from OCA.
Reference
- Young PG, Smith CA, Metcalf P, Baker EN. Structures of Mycobacterium tuberculosisfolylpolyglutamate synthase complexed with ADP and AMPPCP. Acta Crystallogr D Biol Crystallogr. 2008 Jul;64(Pt 7):745-53. Epub 2008, Jun 18. PMID:18566510 doi:S0907444908012262
Page seeded by OCA on Tue Feb 17 11:23:41 2009
Categories: Mycobacterium tuberculosis | Tetrahydrofolate synthase | Baker, E N. | Metcalf, P. | Smith, C A. | Young, P G. | Atp-binding | Cell cycle | Cell division | Cell shape | Cell wall biogenesis/degradation | Cobalt binding | Conformational change | Folate metabolism | Ligase | Nucleotide binding | Nucleotide-binding | Peptidoglycan synthesis
