>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=99.97 E-value=1.7e-29 Score=220.30 Aligned_cols=339 Identities=18% Similarity=0.231 Sum_probs=213.2 Q ss_pred HHHH-HCC--CCCEEEECCCCCCHHHHHHHHHH-CCCCCCEEEE-------------ECCCCCC---------------- Q ss_conf 8864-116--85158704578404778888640-3444430575-------------3573333---------------- Q gi|254781096|r 100 LAGL-MRC--RKSISVSGTHGKTTTTSLIAALL-EQGKFDPTVI-------------NGGIINS---------------- 146 (474) Q Consensus 100 l~~~-~~~--~~~IaVTGTnGKTTTt~ml~~il-~~~g~~~~~~-------------~G~~~~~---------------- 146 (474) T Consensus 11 LG~P~~~~~a~~~IHVaGTNGKGST~a~l~~iL~~~~G~~VG~fTSPHl~~f~ERI~~nG~~i~d~~~~~~~~~~~~~~~ 90 (460) T TIGR01499 11 LGNPHQDLNALPVIHVAGTNGKGSTCAFLESILREAAGYKVGLFTSPHLVSFNERIRVNGEPISDEELAQAFEQVRPILK 90 (460) T ss_pred CCCCHHHHCCCCEEEEEEECCCHHHHHHHHHHHHHHCCCEEEEEECCEEEEEEEEEEECCEECCHHHHHHHHHHHHHHHH T ss_conf 08873792489779997206875899999999887539778888737387422347898857688999999999999875 Q ss_pred -CC------CC-------------CCC-CCCCCCHHHC---CCCCCHHHHCC-CCCEEEEEEECCCHHHCC-HHHHHHHH Q ss_conf -31------00-------------146-8542001102---32210122118-553034222022011000-25566664 Q gi|254781096|r 147 -YG------TN-------------ARI-GTSEWIVVEA---DESDGTFIRLP-SDIVVVTNIDPEHLDYYG-DFNAIRAA 200 (474) Q Consensus 147 -~~------~~-------------~~~-~~~~~~V~E~---~e~~~s~~~~~-P~iaVitNI~~DHld~~~-s~e~y~~a 200 (474) T Consensus 91 ~~~~~~~~~~~t~FE~~T~~Af~~F~~~~~vd~av~EVGlGGrlDaT-Nv~~~p~~~~iT~ig~DH~~~LG~t~~~IA~e 169 (460) T TIGR01499 91 KLSQETEYSQPTFFELLTLLAFLYFAQLAQVDVAVLEVGLGGRLDAT-NVVEKPLVSVITSIGLDHTEILGDTLEEIAWE 169 (460) T ss_pred HHHCCCCCCCCCHHHHHHHHHHHHHHHHCCCCEEEEEECCCCCCCCC-CCCCCCEEEEECCCCHHHHHHHCCCHHHHHHH T ss_conf 33101358777789999999999999850882899987376544554-41138637997277768886505337999997 Q ss_pred HHCCCCCCCCCCCCCCCC-CCCHHHHHHHHCC-CCC-CCCCCCCCCCCEEEEEEEECCCCCEEEEEEECCCCCCCCCCCC Q ss_conf 301333333222222234-6501345432001-112-3333333222202210211258420135551134444420000 Q gi|254781096|r 201 FYKFIDNIPFYGFAVVCM-DHPEVRSLIARIQ-NRK-IITYGRHPQADIRYSNIRKYSGRSIFDVSVQGNVTKDLTVIKD 277 (474) Q Consensus 201 K~~i~~~~~~~g~~vin~-Dd~~~~~~~~~~~-~~~-v~~fg~~~~~d~~~~~i~~~~~~~~f~~~~~~~~~~~~~~~~~ 277 (474) T Consensus 170 KAGI~k~g~P---~v~~~~~~~ea~~v~~~~A~~~~~~~l~~~--~~~~~~~~~~~~~~g~~~~~~~~------~~~~~~ 238 (460) T TIGR01499 170 KAGIIKEGVP---IVTGEVQEPEALEVLKKKAEEKGAAPLQVV--GKDFDIKEKDENLNGEKFSFSGE------NLFLEP 238 (460) T ss_pred HHHHHCCCCC---EEEECCCCHHHHHHHHHHHHHHCCCEEEEE--CCCCCCCCCCCCCCCCEEEECCC------CCCCHH T ss_conf 4576216765---687148866899999999997168604650--34132211112246521222355------542100 Q ss_pred C--CCCCCCCCCCCCCCCCCCHHHHHHC------HHHHHH-HHHHCCCCCCCCEEEECCCC-----CEEEEEECCCCCCC Q ss_conf 2--3567654333221121001232100------000013-34310000158221101478-----60476302445543 Q gi|254781096|r 278 L--SLPLIGEHNISNACASIAVAYKLGL------SSEDVK-KGLASFSGIKRRFTLVGVWN-----DVHVFDDYGHHPIE 343 (474) Q Consensus 278 ~--~l~l~G~Hn~~NalaAia~a~~lgi------~~e~i~-~~L~~f~g~~~R~e~v~~~~-----gv~~idDyahnP~~ 343 (474) T Consensus 239 ~~~~~~L~G~~Q~~Na~~A~~~~~~l~~~~~~~~~~~~~~~~GL~~~~w-pGR~e~~~~~~~~~~~~p~~~lDGAHNp~~ 317 (460) T TIGR01499 239 LLAKLSLLGDHQAENAALALAALEVLGKQSSEKLSEAAIRSEGLASTIW-PGRLEILSEDKDAKAANPNILLDGAHNPHS 317 (460) T ss_pred CCCCCCCCHHHHHHHHHHHHHHHHHHCCCCCCCCCHHHHHHHHHHHHCC-CCCEEEEECCCCHHHCCCEEEEECCCCHHH T ss_conf 1355565679999999999999998502356666766788898885111-220113303541223387179952768789 Q ss_pred CHHHHHHHH--CCCCCCCEEEEECCCCHH-HHHHHHHHHHHHHH-CCE-EEEECC-CCCCCCCCCCCCHHHHHHHHHHCC Q ss_conf 022233310--134432103330366314-78889999999861-899-999086-667764323899999999999638 Q gi|254781096|r 344 ISSVLAAVR--QICPRKIIAIHQPHRYSR-LSTLFDQFSSCFGD-ADI-VLISPV-YSAGEKEIPGFSSPELVKNIKLQG 417 (474) Q Consensus 344 i~atl~al~--~~~~~rii~i~~p~~~sr-~~~~~~e~~~~l~~-ad~-vil~~i-~~~~e~~~~g~~~~~l~~~i~~~~ 417 (474) T Consensus 318 ~~~l~~~~~~~~~~~~~~~~~~~~l-~~Kd~~~~l~~L~~~~~~i~~~~~~~~~~~~~------~a~~~~~~~~~~~~~~ 390 (460) T TIGR01499 318 AEALVEWLKEKEFNGRPITLLFGAL-ADKDAAAMLALLRELVPKIFEEIVYVTPFDYP------RALDAADLEAAAEAFG 390 (460) T ss_pred HHHHHHHHHHHHHCCCCCEEEEEEC-CCCCHHHHHHHHHHHHHHHHCEEEEECCCCCC------CCCCHHHHHHHHHHCC T ss_conf 9999999999862699718888611-36887899888787435652217686177862------3367578999997405 Q ss_pred CC----CEEEECCHHHHHHHH---------------------HH--HCCCCCEEEEECCCCHHHHHHHHHH Q ss_conf 99----899988989999999---------------------98--5589879999448998899999999 Q gi|254781096|r 418 HP----QAYYMDSFDHLVSKI---------------------LA--IAEPGDFIIFFGAGNITQWAASLIG 461 (474) Q Consensus 418 ~~----~~~~~~~~~eav~~~---------------------~~--~~~~gDvVL~~GaG~~~~~~~~~~~ 461 (474) T Consensus 391 ~~~~~~~~~~~~~~~~~l~~~~~~~~~~~v~~~~~~~~~~~~~~~~~~~~~~~~lVt--GSlyLvg-~v~~ 458 (460) T TIGR01499 391 SEELEKAAETVSSWREALELAEKLDEAQKVSALIEIAYLLVALEKEKAKADDLILVT--GSLYLVG-EVRK 458 (460) T ss_pred CHHHHHHHHHHHHHHHHHHHCCCCCCCCCCHHHHHHHHHHHHHHHCCCCCCCCEEEE--EHHHHHH-HHHH T ss_conf 415667787673089999716678765510245778988888875056767737887--2599999-9998

HHsearch alignment for GI: 254781096 and conserved domain: TIGR01499