>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=100.00 E-value=1.2e-33 Score=241.81 Aligned_cols=350 Identities=20% Similarity=0.251 Sum_probs=223.2 Q ss_pred HHHHHHHHHHHHHHCCCCCEEEEECCCCCCHHHHHHHHHH-HHHHCCC---CCH--HHHHCCC---CCCCH--------- Q ss_conf 8999999999998306993999830365420123346777-7520112---221--2211014---57410--------- Q gi|254781101|r 91 VLGALNKLAVAARLRSKATIIAITGSVGKTTTKEMLTIAL-SSIKKTY---ACI--GSYNNHI---GVPLT--------- 152 (472) Q Consensus 91 ~~~al~~la~~~~~~~~~~vI~ITGTnGKTTt~~~l~~iL-~~~~~~~---~t~--gn~Nn~i---Gvplt--------- 152 (472) T Consensus 4 ~~~ll~~LG~P~~~~~a~~~IHVaGTNGKGST~a~l~~iL~~~~G~~VG~fTSPHl~~f~ERI~~nG~~i~d~~~~~~~~ 83 (460) T TIGR01499 4 MKKLLEALGNPHQDLNALPVIHVAGTNGKGSTCAFLESILREAAGYKVGLFTSPHLVSFNERIRVNGEPISDEELAQAFE 83 (460) T ss_pred HHHHHHHCCCCHHHHCCCCEEEEEEECCCHHHHHHHHHHHHHHCCCEEEEEECCEEEEEEEEEEECCEECCHHHHHHHHH T ss_conf 88999970887379248977999720687589999999988753977888873738742234789885768899999999 Q ss_pred -------------------------HCC----CC-CCCHHHHHCCCCCCCCCCCCCCCCCC-CCEEEEEEECCCHHHHHH Q ss_conf -------------------------001----23-22144430156644332112122323-220255531210123444 Q gi|254781101|r 153 -------------------------LAR----MP-VDVDFGIFELGMSHLGEIRFLTHLVR-PHIAVITTIAPAHLSNFS 201 (472) Q Consensus 153 -------------------------ll~----~~-~~~~~~V~E~g~~~~gei~~L~~i~~-P~iaiiTNI~~dHld~~~ 201 (472) T Consensus 84 ~~~~~~~~~~~~~~~~~~t~FE~~T~~Af~~F~~~~~vd~av~EVGlG--GrlDa-TNv~~~p~~~~iT~ig~DH~~~LG 160 (460) T TIGR01499 84 QVRPILKKLSQETEYSQPTFFELLTLLAFLYFAQLAQVDVAVLEVGLG--GRLDA-TNVVEKPLVSVITSIGLDHTEILG 160 (460) T ss_pred HHHHHHHHHHCCCCCCCCCHHHHHHHHHHHHHHHHCCCCEEEEEECCC--CCCCC-CCCCCCCEEEEECCCCHHHHHHHC T ss_conf 999987533101358777789999999999999850882899987376--54455-441138637997277768886505 Q ss_pred -HHHHHHHHHHHHCCCCCCCCHHHHCC-CC-HHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC Q ss_conf -57888865433103762210121013-42-4689987520123333322222222222223442113465100124565 Q gi|254781101|r 202 -GIEEIASAKAEIFEGLEKTGTIFLNY-DD-SFFELLKAKSHALGIKTIYSFGKSKNADFQLRKWKQCSEQSWMEVQLQG 278 (472) Q Consensus 202 -s~e~i~~~K~~i~~~l~~~g~~ViN~-Dd-~~~~~l~~~~~~~~~~~i~~~g~~~~ad~~~~~i~~~~~~~~~~~~~~~ 278 (472) T Consensus 161 ~t~~~IA~eKAGI~k~g~P---~v~~~~~~~ea~~v~~~~A~~~~~~~l~~~~~----~~~~~~~~~~~~g~~~~~~~~~ 233 (460) T TIGR01499 161 DTLEEIAWEKAGIIKEGVP---IVTGEVQEPEALEVLKKKAEEKGAAPLQVVGK----DFDIKEKDENLNGEKFSFSGEN 233 (460) T ss_pred CCHHHHHHHHHHHHCCCCC---EEEECCCCHHHHHHHHHHHHHHCCCEEEEECC----CCCCCCCCCCCCCCEEEECCCC T ss_conf 3379999974576216765---68714886689999999999716860465034----1322111122465212223555 Q ss_pred C-CCCC--CCCCCCCCCCCCCCCHHHHHHHHC------CCCHHHH-HHHHCCCCCCCCCCCCEECCCC---CCEEEEEEC Q ss_conf 4-3221--222222223333221035676510------1210345-5431147664433101000365---311331000 Q gi|254781101|r 279 K-SMEV--VHHGIGYHMAQNMLMTLGIVSILT------ADVDTAI-KALSVFHPKEGRGKRYRCALNQ---GFFTLIDES 345 (472) Q Consensus 279 ~-~~~~--~l~~~G~hnv~NalaAia~~~~lG------i~~~~i~-~~L~~~~~~~GR~~~~~~~~~~---~~~~iIDDs 345 (472) T Consensus 234 ~~~~~~~~~~~L~G~~Q~~Na~~A~~~~~~l~~~~~~~~~~~~~~~~GL~~~~-wpGR~e~~~~~~~~~~~~p~~~lDGA 312 (460) T TIGR01499 234 LFLEPLLAKLSLLGDHQAENAALALAALEVLGKQSSEKLSEAAIRSEGLASTI-WPGRLEILSEDKDAKAANPNILLDGA 312 (460) T ss_pred CCCHHCCCCCCCCHHHHHHHHHHHHHHHHHHCCCCCCCCCHHHHHHHHHHHHC-CCCCEEEEECCCCHHHCCCEEEEECC T ss_conf 42100135556567999999999999999850235666676678889888511-12201133035412233871799527 Q ss_pred CCCCCCCHHHHHHHHHHHHHCCCCCCEEEECCHHHCCCCHHHHHHHHHHHHHHCCCC----E-EEEECCC------HHHH Q ss_conf 256532101257778741110268713885123541710589999999999864998----9-9998803------8989 Q gi|254781101|r 346 YNANPASMKAAISVLSQISPHGEGRRIAVLGDMCEMGELSQSFHIDLAEVLSLYNIS----H-VWLSGFH------VLAL 414 (472) Q Consensus 346 YNAnP~S~~aal~~l~~~~~~~~~r~i~VlG~m~ELG~~~~~~h~~i~~~~~~~~~d----~-v~~~G~~------~~~~ 414 (472) T Consensus 313 --HNp~~~~~l~~~~~~-~~~~~~~~~~~~~~l~------~Kd~~~~l~~L~~~-~~~i~~~~~~~~~~~~~~a~~~~~~ 382 (460) T TIGR01499 313 --HNPHSAEALVEWLKE-KEFNGRPITLLFGALA------DKDAAAMLALLREL-VPKIFEEIVYVTPFDYPRALDAADL 382 (460) T ss_pred --CCHHHHHHHHHHHHH-HHHCCCCCEEEEEECC------CCCHHHHHHHHHHH-HHHHHCEEEEECCCCCCCCCCHHHH T ss_conf --687899999999999-8626997188886113------68878998887874-3565221768617786233675789 Q ss_pred HHHCCCCC-C-----EEEECCHHHHHHHH---------------------HH--HCCCCCEEEEECCCHHHHHHHHHHHH Q ss_conf 98511379-7-----99978989999999---------------------98--44789899997713254899999999 Q gi|254781101|r 415 KDALPRSI-H-----VHYSETMDGLFLFI---------------------QS--SLVDGDVVVVKSSNSCGFYRLINLLL 465 (472) Q Consensus 415 ~~~~~~~~-~-----~~~~~~~e~a~~~l---------------------~~--~~~~gdiVLiKGSr~~~le~iv~~L~ 465 (472) T Consensus 383 ~~~~~~~~~~~~~~~~~~~~~~~~~l~~~~~~~~~~~v~~~~~~~~~~~~~~~~~~~~~~~~lVtGSly-----Lvg~v~ 457 (460) T TIGR01499 383 EAAAEAFGSEELEKAAETVSSWREALELAEKLDEAQKVSALIEIAYLLVALEKEKAKADDLILVTGSLY-----LVGEVR 457 (460) T ss_pred HHHHHHCCCHHHHHHHHHHHHHHHHHHHCCCCCCCCCCHHHHHHHHHHHHHHHCCCCCCCCEEEEEHHH-----HHHHHH T ss_conf 999974054156677876730899997166787655102457789888888750567677378872599-----999999 Q ss_pred H Q ss_conf 8 Q gi|254781101|r 466 E 466 (472) Q Consensus 466 ~ 466 (472) T Consensus 458 ~ 458 (460) T TIGR01499 458 K 458 (460) T ss_pred H T ss_conf 8

HHsearch alignment for GI: 254781101 and conserved domain: TIGR01499