>TIGR01821 5aminolev_synth 5-aminolevulinic acid synthase; InterPro: IPR010961 Tetrapyrroles are large macrocyclic compounds derived from a common biosynthetic pathway . The end-product, uroporphyrinogen III, is used to synthesise a number of important molecules, including vitamin B12, haem, sirohaem, chlorophyll, coenzyme F430 and phytochromobilin . The first stage in tetrapyrrole synthesis is the synthesis of 5-aminoaevulinic acid ALA via two possible routes: (1) condensation of succinyl CoA and glycine (C4 pathway) using ALA synthase (2.3.1.37 from EC), or (2) decarboxylation of glutamate (C5 pathway) via three different enzymes, glutamyl-tRNA synthetase (6.1.1.17 from EC) to charge a tRNA with glutamate, glutamyl-tRNA reductase (1.2.1.70 from EC) to reduce glutamyl-tRNA to glutamate-1-semialdehyde (GSA), and GSA aminotransferase (5.4.3.8 from EC) to catalyse a transamination reaction to produce ALA. The second stage is to convert ALA to uroporphyrinogen III, the first macrocyclic tetrapyrrolic structure in the pathway. This is achieved by the action of three enzymes in one common pathway: porphobilinogen (PBG) synthase (or ALA dehydratase, 4.2.1.24 from EC) to condense two ALA molecules to generate porphobilinogen; hydroxymethylbilane synthase (or PBG deaminase, 2.5.1.61 from EC) to polymerise four PBG molecules into preuroporphyrinogen (tetrapyrrole structure); and uroporphyrinogen III synthase (4.2.1.75 from EC) to link two pyrrole units together (rings A and D) to yield uroporphyrinogen III. Uroporphyrinogen III is the first branch point of the pathway. To synthesise cobalamin (vitamin B12), sirohaem, and coenzyme F430, uroporphyrinogen III needs to be converted into precorrin-2 by the action of uroporphyrinogen III methyltransferase (2.1.1.107 from EC). To synthesise haem and chlorophyll, uroporphyrinogen III needs to be decarboxylated into coproporphyrinogen III by the action of uroporphyrinogen III decarboxylase (4.1.1.37 from EC) . This entry represents 5-aminoaevulinic acid (ALA) synthase (2.3.1.37 from EC), which catalyses the first stage of tetrapyrrole biosynthesis by the C4 pathway, namely the condensation of succinyl CoA and glycine. ALA synthase is a pyridoxal-phosphate-dependent enzyme. During catalysis, glycine initially binds to the enzyme cofactor, and after condensation with succinyl CoA, CoA, carbon dioxide and 5-aminolevulinic acid are produced .; GO: 0003870 5-aminolevulinate synthase activity, 0030170 pyridoxal phosphate binding, 0033014 tetrapyrrole biosynthetic process.

Probab=99.94 E-value=3.7e-26 Score=191.47 Aligned_cols=334 Identities=18% Similarity=0.191 Sum_probs=224.0 Q ss_pred EEEECCCE----EEECCC-CEEEECHHHHHHHCCCCC-CHHHHHHHHHHHHHCCCCC-----CCCCCHHHHHHHHHHHHH Q ss_conf 98501037----996799-764641022674357878-9999999999997314506-----875781899999865201 Q gi|254780432|r 18 FEKGKGAW----LFSENG-IPFLDFASGIAVNSLGHS-HPELVAILKSQSEKLWHVS-----NLYQSTQQEIFANHLIHS 86 (392) Q Consensus 18 i~~a~G~~----i~d~dG-~~yiD~~~g~~~~~lGh~-~p~i~~a~~~q~~~~~~~~-----~~~~~~~~~~la~~L~~~ 86 (392) T Consensus 26 l~R~ag~FP~A~~~~~~g~~~dVtVWCS--NDYLGMgqHp~Vl~Am~~~~~~~GaGaGGTRNIsGtn~~~v~LEaELAdL 103 (427) T TIGR01821 26 LERLAGEFPFAQWHSPDGVKKDVTVWCS--NDYLGMGQHPKVLQAMHEALDKVGAGAGGTRNISGTNIYHVELEAELADL 103 (427) T ss_pred HHHHHCCCCCCEEECCCCCCEEEEEEEC--CCHHHCCCCHHHHHHHHHHHHHCCCCCCCCCCCCCCCHHHHHHHHHHHHH T ss_conf 3635178985134265778101788721--21320488654798899999963889987536566777899999999755 Q ss_pred CCCCCCCCCCCCCCCHHHHHH-HHHHHHHCCCCCCCCCCCCCCCC-CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCH Q ss_conf 013331235655540356777-66543200134786002343546-5654321234553211347999864333222100 Q gi|254780432|r 87 TFADRVFFTNSGAESVECAIK-TARRYHYMAGKTNKFRIVTFEGA-FHGRTLATISAGGKLQYLEGFGPKIEGFDQAKFC 164 (392) Q Consensus 87 ~~~~~v~f~~SGseA~e~Aik-lar~~~~~~g~t~r~~ii~~~~~-yHG~t~~a~s~s~~~~~~~~~~p~~~~~~~~~~~ 164 (392) T Consensus 104 H~KE~ALvFtSgyVaNda~L~tL~k~~------P~---~~ifSD~LNH----A-SMI~GIr~---S~~~k----~iFrHN 162 (427) T TIGR01821 104 HGKESALVFTSGYVANDATLATLAKII------PG---CVIFSDELNH----A-SMIEGIRR---SGAEK----FIFRHN 162 (427) T ss_pred CCCCHHHHHHHHHHHHHHHHHHHHHHC------CC---EEEEECCCCH----H-HHHHHHHH---CCCCE----EEEECC T ss_conf 173113567788999999999999870------88---5898365563----5-69999874---78950----563059 Q ss_pred HHHHHHHHCC-CCCC---CCCCCCCCCCCCCCCCCHHHHHHHHCCCCCCCCEEEECCCC-CCCCCCCCCCC--CCCC--- Q ss_conf 2688754101-2332---22233322221124621012322110223457213101100-34444555310--1112--- Q gi|254780432|r 165 DLQSLKNQIS-NDTA---AILIEPIQGEGGVRKVPEEFLQQLRKICDDIDALLIFDEVQ-TGYGRTGKLFA--YEWA--- 234 (392) Q Consensus 165 d~~~l~~~~~-~~iA---avi~Epv~g~~G~~~~~~~~l~~l~~lc~~~g~llI~DEV~-tG~GRtG~~f~--~e~~--- 234 (392) T Consensus 163 D~~hLe~LL~~~d~~~PKiIAFESvYSMDGd~aP----i~eiCDlA~kYGALTy~DEVHAVGl--YGprGgGIaErddfe 236 (427) T TIGR01821 163 DVAHLEKLLQSVDPNAPKIIAFESVYSMDGDIAP----IKEICDLADKYGALTYLDEVHAVGL--YGPRGGGIAERDDFE 236 (427) T ss_pred CHHHHHHHHHHCCCCCCCEEEEEEHCCCCCCCCC----HHHHHHHHHHHCCCCEECCEEEECC--CCCCCCCCCHHHHCC T ss_conf 9789999986477998956886100016787266----7889668887188630011465336--588888512022110 Q ss_pred -----C--------------C--CCCEE--ECCCCCC--CCCCCCCCCCCCCCCCCCCCCCCC--CCCCCCCCCHHHHHH Q ss_conf -----4--------------5--45302--1034444--443443210001112222233223--453211110012334 Q gi|254780432|r 235 -----N--------------V--KPDIM--TIAKGMG--GGFPIGACLATNEVAACMNQGSHG--STYGGNVLAMVLGEK 287 (392) Q Consensus 235 -----g--------------i--~PDi~--~~gK~l~--gG~P~sav~~~~~i~~~~~~~~~~--~T~~gnpl~~aaa~a 287 (392) T Consensus 237 shrasGiatPktndkGGakt~mhriDii~GTLaKAFG~~GGY----Ia~~~~L~D~~RS~ApGFIFTTsLPP~~~aGA~a 312 (427) T TIGR01821 237 SHRASGIATPKTNDKGGAKTLMHRIDIIEGTLAKAFGVVGGY----IAASRKLIDAVRSYAPGFIFTTSLPPAIAAGALA 312 (427) T ss_pred HHCCCCCCCCCCCCCCCCEECCCCCCCCCCCCHHHCCCCCCE----EECCCCCEEEEEECCCCCHHHHHHHHHHHHHHHH T ss_conf 000157677765766652001110000016511223444530----2055221320000378421242155899999999 Q ss_pred HHHHHHCC--C-CCCHHHHHCCHHHHHHHHHHH---HCCCEEEEECCCEEEEEEEECCCHHHHHHHHH-HCCEEE----- Q ss_conf 55432012--2-210112100002688999988---67970755046400999872499899999999-689899----- Q gi|254780432|r 288 VLNIIQSD--G-FLENVINIAKILFEGLTAIKN---RFPNMFLEVRGQGLLIGLKTVFSPALLAAKFR-DECLLT----- 355 (392) Q Consensus 288 ~L~~l~~~--~-l~~~~~~~g~~l~~~L~~l~~---~~~~~v~~vRG~Gl~~~ie~~~~~~~~~~~l~-~~Gll~----- 355 (392) T Consensus 313 sIRhLK~~eg~~lR~~hQ~~~~~lK~~L~~~GlPv~~~pSHIvPv-----~iG--dA~~~k~~SD~LL~~hGIYVQpINy 385 (427) T TIGR01821 313 SIRHLKESEGQDLRRAHQERVKRLKKLLEALGLPVIDNPSHIVPV-----IIG--DAAKCKKVSDLLLNKHGIYVQPINY 385 (427) T ss_pred HHHHHHHCCCHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCEEEEE-----EEC--CHHHHHHHHHHHHHHCCCEEECCCC T ss_conf 999975137677899998999999999995777754887738876-----766--8688989989888717815712688 Q ss_pred --EECCCCEEEECCCCCCCHHHHHHHHHHHHHHHHHHC Q ss_conf --626898899558986889999999999999999852 Q gi|254780432|r 356 --APSSDNVVRILPPLTITAEEIHEGLERIERTAIKLS 391 (392) Q Consensus 356 --~~~~~~~irl~Ppl~it~~eid~~i~~l~~al~~L~ 391 (392) T Consensus 386 PTVpRG~ERLRitPtP~H~~~~id~Lv~AL~~~w~~l~ 423 (427) T TIGR01821 386 PTVPRGTERLRITPTPVHTDKLIDDLVEALLLVWDRLG 423 (427) T ss_pred CCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHC T ss_conf 88988750244268889887789999999999988613

HHsearch alignment for GI: 254780432 and conserved domain: TIGR01821