View source for 1jbv

[[Image:1jbv.jpg|left|200px]]

 {{Structure
|PDB= 1jbv |SIZE=350|CAPTION= <scene name='initialview01'>1jbv</scene>, resolution 1.95&Aring;
|SITE= 
|LIGAND= <scene name='pdbligand=ACP:PHOSPHOMETHYLPHOSPHONIC+ACID+ADENYLATE+ESTER'>ACP</scene>, <scene name='pdbligand=KCX:LYSINE+NZ-CARBOXYLIC+ACID'>KCX</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>
|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Tetrahydrofolate_synthase Tetrahydrofolate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.2.17 6.3.2.17] </span>
|GENE= 
|DOMAIN=
|RELATEDENTRY=[[1fgs|1FGS]], [[1jbw|1JBW]]
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1jbv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1jbv OCA], [http://www.ebi.ac.uk/pdbsum/1jbv PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1jbv RCSB]</span>
}}

'''FPGS-AMPPCP complex'''


==Overview==
Folic acid is an essential vitamin for normal cell growth, primarily through its central role in one-carbon metabolism. Folate analogs (antifolates) are targeted at the same reactions and are widely used as therapeutic drugs for cancer and bacterial infections. Effective retention of folates in cells and the efficacy of antifolate drugs both depend upon the addition of a polyglutamate tail to the folate or antifolate molecule by the enzyme folylpolyglutamate synthetase (FPGS). The reaction mechanism involves the ATP-dependent activation of the free carboxylate group on the folate molecule to give an acyl phosphate intermediate, followed by attack by the incoming L-glutamate substrate. FPGS shares a number of structural and mechanistic details with the bacterial cell wall ligases MurD, MurE and MurF, and these enzymes, along with FPGS, form a subfamily of the ADP-forming amide bond ligase family. High-resolution crystallographic analyses of binary and ternary complexes of Lactobacillus casei FPGS reveal that binding of the first substrate (ATP) is not sufficient to generate an active enzyme. However, binding of folate as the second substrate triggers a large conformational change that activates FPGS and allows the enzyme to adopt a form that is then able to bind the third substrate, L-glutamate, and effect the addition of a polyglutamate tail to the folate.

==About this Structure==
1JBV 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=1JBV OCA]. 

==Reference==
Folate-binding triggers the activation of folylpolyglutamate synthetase., Sun X, Cross JA, Bognar AL, Baker EN, Smith CA, J Mol Biol. 2001 Jul 27;310(5):1067-78. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11501996 11501996]
[[Category: Lactobacillus casei]]
[[Category: Single protein]]
[[Category: Tetrahydrofolate synthase]]
[[Category: Baker, E N.]]
[[Category: Bognar, A L.]]
[[Category: Cross, J A.]]
[[Category: Smith, C A.]]
[[Category: Sun, X.]]
[[Category: fpgs amppcp complex]]

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