>TIGR01499 folC FolC bifunctional protein; InterPro: IPR001645 Folylpolyglutamate synthase 6.3.2.17 from EC (FPGS) is responsible for the addition of a polyglutamate tail to folate and folate derivatives, is an ATP-dependent enzyme isolated from eukaryotic and bacterial sources, where it plays a key role in the retention of the intracellular folate pool Its sequence is moderately conserved between prokaryotes (gene folC) and eukaryotes. FPGS belongs to a protein family that contains a number of related peptidoglycan synthetases (Mur) 6.3.2. from EC (see ). A crystal structure of the MgATP complex of the enzyme from Lactobacillus casei reveals that folylpolyglutamate synthetase is a modular protein consisting of two domains, one with a typical mononucleotide-binding fold and the other strikingly similar to the folate-binding enzyme dihydrofolate reductase. The active site of the enzyme is located in a large interdomain cleft adjacent to an ATP-binding P-loop motif. Opposite this site, in the C domain, a cavity likely to be the folate binding site has been identified, and inspection of this cavity and the surrounding protein structure suggests that the glutamate tail of the substrate may project into the active site. A further feature of the structure is a well defined Omega loop, which contributes both to the active site and to interdomain interactions .; GO: 0004326 tetrahydrofolylpolyglutamate synthase activity, 0005524 ATP binding, 0009396 folic acid and derivative biosynthetic process.

Probab=99.91 E-value=2.9e-24 Score=186.59 Aligned_cols=258 Identities=22% Similarity=0.240 Sum_probs=178.3 Q ss_pred CCEEEEECCCCCCHHHHHHHHHH-HHHHHHCCCCC-------C--C---CCCCCC------------------------- Q ss_conf 86899603457521578999999-87310000000-------1--2---443221------------------------- Q gi|254781099|r 113 SPFIAVTGTNGKSSTVALISHVL-RKNGYDVQLGG-------N--I---GLPILN------------------------- 154 (468) Q Consensus 113 ~~vI~VTGT~GKTTt~~ll~~iL-~~~g~~~~~~G-------N--i---G~p~~~------------------------- 154 (468) T Consensus 21 ~~~IHVaGTNGKGST~a~l~~iL~~~~G~~VG~fTSPHl~~f~ERI~~nG~~i~d~~~~~~~~~~~~~~~~~~~~~~~~~ 100 (460) T TIGR01499 21 LPVIHVAGTNGKGSTCAFLESILREAAGYKVGLFTSPHLVSFNERIRVNGEPISDEELAQAFEQVRPILKKLSQETEYSQ 100 (460) T ss_pred CCEEEEEEECCCHHHHHHHHHHHHHHCCCEEEEEECCEEEEEEEEEEECCEECCHHHHHHHHHHHHHHHHHHHCCCCCCC T ss_conf 97799972068758999999998875397788887373874223478988576889999999999998753310135877 Q ss_pred -------------CCCC-CCCCEEEEECC-CCCCCCCCCCC-CCCCEEEEECCCHHHHHH-HHHHCCCCCCCEEEECCCC Q ss_conf -------------1016-88837999217-75432122333-221011100210122211-1000011221000101344 Q gi|254781099|r 155 -------------LEYF-SPNRFYVIECS-SYQIELTPTID-PSIGVLLNISPDHLDRHH-TLENYVNIKKKIVTMSKHA 217 (468) Q Consensus 155 -------------~~~~-~~~~~~V~E~S-SfQL~~~~~~~-PdiavITNI~~DHLd~~~-s~e~y~~aK~~i~~~~~~~ 217 (468) T Consensus 101 ~t~FE~~T~~Af~~F~~~~~vd~av~EVGlGGrlDaTNv~~~p~~~~iT~ig~DH~~~LG~t~~~IA~eKAGI~k~g~P~ 180 (460) T TIGR01499 101 PTFFELLTLLAFLYFAQLAQVDVAVLEVGLGGRLDATNVVEKPLVSVITSIGLDHTEILGDTLEEIAWEKAGIIKEGVPI 180 (460) T ss_pred CCHHHHHHHHHHHHHHHHCCCCEEEEEECCCCCCCCCCCCCCCEEEEECCCCHHHHHHHCCCHHHHHHHHHHHHCCCCCE T ss_conf 77899999999999998508828999873765445544113863799727776888650533799999745762167656 Q ss_pred CCCC-CCHHHHHHHHHCC-CCC-CEEECCCCCCCCCCCCEEECCCEEEECCCCCCCCC---CCCCCCCHHHHHCCCHHHH Q ss_conf 3224-7867899987401-234-30110364432223411212413541467642123---4558851011100110122 Q gi|254781099|r 218 IICI-NDHQCEKIAYDMN-FIG-HSISRISSQSLQSDSDLYIDESFLKCSATSEVIFD---FSQETKKHNIQNLVTSAVV 291 (468) Q Consensus 218 iln~-dd~~~~~~~~~~~-~~~-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~---~~~l~G~HNi~NalaAia~ 291 (468) T Consensus 181 v~~~~~~~ea~~v~~~~A~~~~~~~l~~~~~~~~~~~~~~~~~g~~~~~~~~~~~~~~~~~~~~L~G~~Q~~Na~~A~~~ 260 (460) T TIGR01499 181 VTGEVQEPEALEVLKKKAEEKGAAPLQVVGKDFDIKEKDENLNGEKFSFSGENLFLEPLLAKLSLLGDHQAENAALALAA 260 (460) T ss_pred EEECCCCHHHHHHHHHHHHHHCCCEEEEECCCCCCCCCCCCCCCCEEEECCCCCCCHHCCCCCCCCHHHHHHHHHHHHHH T ss_conf 87148866899999999997168604650341322111122465212223555421001355565679999999999999 Q ss_pred HHCCCCC------CCCCH-HHCCCHHHHHHHHHHHCCCC-----CCEEECCCCCCCHHHHHHHHHCC------CCCCEEE Q ss_conf 2102222------21100-00000013454433210034-----30000023556755555532013------3320012 Q gi|254781099|r 292 CMQLGLK------VEEIK-RALLSCGGLTHRLQTIARLG-----HVIFINDSKATNLHSVIHAFLNE------KRRIYWI 353 (468) Q Consensus 292 a~~lGi~------~~~i~-~~L~~f~gv~~R~E~i~~~~-----gv~iIDDS~atnp~a~~~Al~~~------~~~i~lI 353 (468) T Consensus 261 ~~~l~~~~~~~~~~~~~~~~GL~~~~-wpGR~e~~~~~~~~~~~~p~~~lDG-AHNp~~~~~l~~~~~~~~~~~~~~~~~ 338 (460) T TIGR01499 261 LEVLGKQSSEKLSEAAIRSEGLASTI-WPGRLEILSEDKDAKAANPNILLDG-AHNPHSAEALVEWLKEKEFNGRPITLL 338 (460) T ss_pred HHHHCCCCCCCCCHHHHHHHHHHHHC-CCCCEEEEECCCCHHHCCCEEEEEC-CCCHHHHHHHHHHHHHHHHCCCCCEEE T ss_conf 99850235666676678889888511-1220113303541223387179952-768789999999999986269971888 Q ss_pred ECCCCCCCCHHHHHHHHCCC Q ss_conf 03210122068989984278 Q gi|254781099|r 354 AGGLSKSDDFSTLFPFISKI 373 (468) Q Consensus 354 ~GG~~K~~d~~~L~~~~~~~ 373 (468) T Consensus 339 ~~~l-~~Kd~~~~l~~L~~~ 357 (460) T TIGR01499 339 FGAL-ADKDAAAMLALLREL 357 (460) T ss_pred EEEC-CCCCHHHHHHHHHHH T ss_conf 8611-368878998887874

HHsearch alignment for GI: 254781099 and conserved domain: TIGR01499