>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=7.6e-43 Score=297.44 Aligned_cols=336 Identities=24% Similarity=0.301 Sum_probs=244.9 Q ss_pred CCEEEEEEEECCCEEHHHHHHHH-HHCCCCCCCCCCCCC--------CCC-CCCCC-----------------CCCCC-- Q ss_conf 02245654306520001233333-210232222234544--------332-35544-----------------57675-- Q gi|254781102|r 115 ENILAVTGTSGKSSVASFVQQIC-QRSGLSSFQIGPTST--------ISS-FAQDN-----------------RLTTP-- 165 (497) Q Consensus 115 ~~vIgITGTnGKTTt~~~l~~iL-~~~g~~~~~~g~~~~--------~~~-~~~~~-----------------~~TtP-- 165 (497) 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 ----CHHHHHHHHHHHCC-CCCCCCCCCCCHHHHHHHHHCCC---C-CCCCCCCCCCCCCCCCCC-HHHHHHHHHHHHHH Q ss_conf ----31221111111011-22333335667666555431043---2-121112321545543211-01122345542100 Q gi|254781102|r 166 ----SPIYLAKALSYLSS-QGVTHVSVEASSHGLDQHRLDGI---K-LIAGSFTNLGRDHIDYHQ-TQQAYFNAKMRLFE 235 (497) Q Consensus 166 ----~~~~l~~~l~~~~~-~g~~~~vlEvSS~gl~~~rl~~i---~-~diaviTNI~~dHLd~~g-s~e~y~~aK~~If~ 235 (497) T Consensus 101 ~t~FE~~T~~-Af~~F~~~~~vd~av~EV---GlG-GrlDaTNv~~~p~~~~iT~ig~DH~~~LG~t~~~IA~eKAGI~k 175 (460) T TIGR01499 101 PTFFELLTLL-AFLYFAQLAQVDVAVLEV---GLG-GRLDATNVVEKPLVSVITSIGLDHTEILGDTLEEIAWEKAGIIK 175 (460) T ss_pred CCHHHHHHHH-HHHHHHHHCCCCEEEEEE---CCC-CCCCCCCCCCCCEEEEECCCCHHHHHHHCCCHHHHHHHHHHHHC T ss_conf 7789999999-999999850882899987---376-54455441138637997277768886505337999997457621 Q ss_pred HCCCCCCCCCCCC-CCC-CHHHHHHHCCCCC-CCCCCCCCCCCCCCCCEECCCCCCCCCCCCCCCCEE-EC--CCCCCCC Q ss_conf 0000122321112-542-0001222102356-532222233332200000014544432112221001-01--2234332 Q gi|254781102|r 236 ELLPKESPAIIYA-DDA-YSKEVMKRAHNAG-CRVLSVGYQGKFIHLKKVCAIHNKQQVTISVEGKDF-DF--LFPLPGE 309 (497) Q Consensus 236 ~~~~~~~~~ViN~-Dd~-~~~~l~~~~~~~~-~~~~~~g~~~~~~~~~~~~~~~~~~~~~i~~~~~~~-~~--~l~l~G~ 309 (497) T Consensus 176 ~g~----P~v~~~~~~~ea~~v~~~~A~~~~~~~l~~~~~~---~~~~~~~~~~~g~~~~~~~~~~~~~~~~~~~~L~G~ 248 (460) T TIGR01499 176 EGV----PIVTGEVQEPEALEVLKKKAEEKGAAPLQVVGKD---FDIKEKDENLNGEKFSFSGENLFLEPLLAKLSLLGD 248 (460) T ss_pred CCC----CEEEECCCCHHHHHHHHHHHHHHCCCEEEEECCC---CCCCCCCCCCCCCEEEECCCCCCCHHCCCCCCCCHH T ss_conf 676----5687148866899999999997168604650341---322111122465212223555421001355565679 Q ss_pred CCCCHHHHHHHHHHHCCC------CHHHHH-HHHHHHHHHHHHHCCCCCCC----CCCEEEECCCCCHHHHHHHHHHHH- Q ss_conf 221105778887752026------767631-11234433455210001355----786023000378689999741211- Q gi|254781102|r 310 FQVYNALVAAGLCIAIGI------DSALVL-EHLEKLHVVPGRFEFVGTNS----RGGRIYVDYAHTSNSLEMILKNIR- 377 (497) Q Consensus 310 hni~NalaAia~a~~lGi------~~~~i~-~~L~~f~~~~gR~E~i~~~~----~~~~viiDyahNP~s~~~aL~~l~- 377 (497) T Consensus 249 ~Q~~Na~~A~~~~~~l~~~~~~~~~~~~~~~~GL~~~~w-pGR~e~~~~~~~~~~~~p~~~lDGAHNp~~~~~l~~~~~~ 327 (460) T TIGR01499 249 HQAENAALALAALEVLGKQSSEKLSEAAIRSEGLASTIW-PGRLEILSEDKDAKAANPNILLDGAHNPHSAEALVEWLKE 327 (460) T ss_pred HHHHHHHHHHHHHHHHCCCCCCCCCHHHHHHHHHHHHCC-CCCEEEEECCCCHHHCCCEEEEECCCCHHHHHHHHHHHHH T ss_conf 999999999999998502356666766788898885111-2201133035412233871799527687899999999999 Q ss_pred -HCCCCCCCEEEECCCCCCCCHHHHHHHHHHHHCCE-----EEEC-CCCCCCCCHHHHHHHHHHCCCC-----EEEECCH Q ss_conf -00234440354026654600468999999861989-----9990-8879898989999999834798-----0997898 Q gi|254781102|r 378 -TITSGRIIVVFGCGGDRDQGKRPIMGKIALDLADI-----AIVT-DDNPRSEDPEKIRAEIIHGIPG-----FIEKGNR 445 (497) Q Consensus 378 -~~~~~r~i~V~G~~Gdrd~~kr~~mg~~a~~~ad~-----vi~t-~d~~r~e~~~~I~~~i~~g~~~-----~~~~~dr 445 (497) T Consensus 328 ~~~~~~~~~~~~~~l~~Kd~~---~~l~~L~~~~~~i~~~~~~~~~~~~~~a~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 404 (460) T TIGR01499 328 KEFNGRPITLLFGALADKDAA---AMLALLRELVPKIFEEIVYVTPFDYPRALDAADLEAAAEAFGSEELEKAAETVSSW 404 (460) T ss_pred HHHCCCCCEEEEEECCCCCHH---HHHHHHHHHHHHHHCEEEEECCCCCCCCCCHHHHHHHHHHCCCHHHHHHHHHHHHH T ss_conf 862699718888611368878---99888787435652217686177862336757899999740541566778767308 Q ss_pred HHHHHHH---------------------HH--HCCCCCEEEEEC Q ss_conf 9999999---------------------99--658988999944 Q gi|254781102|r 446 IEAIRTA---------------------IE--MLNKQDVLVVAG 466 (497) Q Consensus 446 ~eAi~~A---------------------~~--~a~~gDvili~G 466 (497) T Consensus 405 ~~~l~~~~~~~~~~~v~~~~~~~~~~~~~~~~~~~~~~~~lVtG 448 (460) T TIGR01499 405 REALELAEKLDEAQKVSALIEIAYLLVALEKEKAKADDLILVTG 448 (460) T ss_pred HHHHHHCCCCCCCCCCHHHHHHHHHHHHHHHCCCCCCCCEEEEE T ss_conf 99997166787655102457789888888750567677378872

HHsearch alignment for GI: 254781102 and conserved domain: TIGR01499