>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=99.96 E-value=1.7e-28 Score=199.23 Aligned_cols=345 Identities=16% Similarity=0.232 Sum_probs=219.5 Q ss_pred CHHHHHHHCCCCCCCCCC---CCE-EEEECC--CCCCCCHHHHHHHHHHHHHHCCCCC-----CHHHHHHHHHHHHHHHH Q ss_conf 978998738410265657---865-997668--8889898999999999986149866-----02679999999999999 Q gi|254781062|r 4 DINSIRKDFPILGRDIRK---KPL-IYFDNA--ASAQKPQDVIDSIMCTYSHEYANIH-----RGLHYMANAVTDKYEKA 72 (406) Q Consensus 4 d~~~~R~~fp~l~~~~~~---~~~-iYld~a--~~~~~~~~V~~a~~~~~~~~~~n~~-----~~~~~~~~~~~~~~~~a 72 (406) T Consensus 25 ~l~R~ag~FP~A~~~~~~g~~~dVtVWCSNDYLGMg-qHp~Vl~Am~~~~~~~GaGaGGTRNIsGtn~~~----v~LE-- 97 (427) T TIGR01821 25 DLERLAGEFPFAQWHSPDGVKKDVTVWCSNDYLGMG-QHPKVLQAMHEALDKVGAGAGGTRNISGTNIYH----VELE-- 97 (427) T ss_pred CHHHHHCCCCCCEEECCCCCCEEEEEEECCCHHHCC-CCHHHHHHHHHHHHHCCCCCCCCCCCCCCCHHH----HHHH-- T ss_conf 436351789851342657781017887212132048-865479889999996388998753656677789----9999-- Q ss_pred HHHHHHHCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHHCCCCCCCCHHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCC Q ss_conf 99999982879765433468768987654322344432013443454011000010000122223222222222222210 Q gi|254781062|r 73 RDKVRRFINASSVKEIIFTRSATESINLVSYGWGARHISTGDEIVLSVMEHHSNIIPWYFLRQRRGASLVWVPIDNQGFF 152 (406) Q Consensus 73 R~~ia~~lga~~~~~v~ft~~~Te~~n~~~~~~~~~~~~~gd~Vi~s~~eh~s~~~~~~~~~~~~G~~v~~i~~~~~g~i 152 (406) T Consensus 98 -aELAdLH~KE~--ALvFtSgy-VaNda~L~tL~--k~~P~~~ifSD~LNHASMI~GIr~S---~~~k~iFrHN------ 162 (427) T TIGR01821 98 -AELADLHGKES--ALVFTSGY-VANDATLATLA--KIIPGCVIFSDELNHASMIEGIRRS---GAEKFIFRHN------ 162 (427) T ss_pred -HHHHHHCCCCH--HHHHHHHH-HHHHHHHHHHH--HHCCCEEEEECCCCHHHHHHHHHHC---CCCEEEEECC------ T ss_conf -99975517311--35677889-99999999999--8708858983655635699998747---8950563059------ Q ss_pred HHHHHHHHC---CC-CCCCCCCCCCCCCCCCCCCCCCEECCCCCCCCCCCCCCCCCCCCCCC--------C-HHH---HC Q ss_conf 257887510---23-34433222222223333333210002344443101233200011100--------0-011---00 Q gi|254781062|r 153 HIDEFKNRL---TE-RTKLIAITHMSNVLGTVIPIKEICRIAHERNIPVLVDGSQGSVHNFV--------D-VQD---ID 216 (406) Q Consensus 153 d~~~l~~~i---~~-~t~lv~i~~~~~~tG~~~pi~~I~~~~~~~g~~~~vD~aq~~g~~~i--------d-~~~---~~ 216 (406) T Consensus 163 D~~hLe~LL~~~d~~~PKiIAFESvYSMDGd~aPi~eiCDlA~kYGALTy~DEVHAVGlYGprGgGIaErddfeshrasG 242 (427) T TIGR01821 163 DVAHLEKLLQSVDPNAPKIIAFESVYSMDGDIAPIKEICDLADKYGALTYLDEVHAVGLYGPRGGGIAERDDFESHRASG 242 (427) T ss_pred CHHHHHHHHHHCCCCCCCEEEEEEHCCCCCCCCCHHHHHHHHHHHCCCCEECCEEEECCCCCCCCCCCHHHHCCHHCCCC T ss_conf 97899999864779989568861000167872667889668887188630011465336588888512022110000157 Q ss_pred ------------------CCCCCCCCCCCCCCCCCCHHHCCCCCCCCCEEECCCCEEEEEEECCCCCCCCCHHCCCCCCC Q ss_conf ------------------11222343222354443100025666310012114530343320245300331000001221 Q gi|254781062|r 217 ------------------CDWYIITGHKLYGPSGIGGLYSKESRLNEMDPFMGGSEMIADVTQDMVTYADLPYRFEPGTP 278 (406) Q Consensus 217 ------------------~D~~~~S~hK~~Gp~G~G~l~~~~~~~~~~~p~~~g~~~~~~~~~~~~~~~~~~~r~e~Gt~ 278 (406) T Consensus 243 iatPktndkGGakt~mhriDii~GTLaKAFG~~G-GYIa~~~~L~D~~RS~ApG------------------FIFTT-sL 302 (427) T TIGR01821 243 IATPKTNDKGGAKTLMHRIDIIEGTLAKAFGVVG-GYIAASRKLIDAVRSYAPG------------------FIFTT-SL 302 (427) T ss_pred CCCCCCCCCCCCEECCCCCCCCCCCCHHHCCCCC-CEEECCCCCEEEEEECCCC------------------CHHHH-HH T ss_conf 6777657666520011100000165112234445-3020552213200003784------------------21242-15 Q ss_pred CCHHHHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCEEEECCCCCCCCCEEEEEECCC-CHHHHHH-HHHHCCC Q ss_conf 2024566421012332222222222222222222222222210132268521586799980899-9999999-9987896 Q gi|254781062|r 279 PISQAIALGVALDYVEKIDRKSIFSYERELARYVRSRLKEVRGMQLVNESLEDSPIISFRLGNI-HPYDLAL-FLDGEGI 356 (406) Q Consensus 279 ~~~~~~al~~al~~~~~~g~~~i~~~~~~l~~~l~~~L~~~~g~~i~~~~~~~~~iv~~~~~~~-~~~~v~~-~L~~~gI 356 (406) T Consensus 303 PP~~~aGA~asIRhLK~~eg~~lR~~hQ~~~~~lK~~L~~~-GlPv~~~p---SHIvPv~iGdA~~~k~~SD~LL~~hGI 378 (427) T TIGR01821 303 PPAIAAGALASIRHLKESEGQDLRRAHQERVKRLKKLLEAL-GLPVIDNP---SHIVPVIIGDAAKCKKVSDLLLNKHGI 378 (427) T ss_pred HHHHHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHHHHC-CCCCCCCC---CEEEEEEECCHHHHHHHHHHHHHHCCC T ss_conf 58999999999999751376778999989999999999957-77754887---738876766868898998988871781 Q ss_pred EEEECCHHHHHHHHHCCCC------CEEEEEECCCCCHHHHHHHHHHHHHHHHHH Q ss_conf 9997521127889972899------579999358889999999999999999971 Q gi|254781062|r 357 AIRAGTHCANPLLKFLGID------SLCRASLAMYNTYEEADKFIETLKKSIQFF 405 (406) Q Consensus 357 ~v~~G~~ca~~~~~~~g~~------~~iRiS~~~~nt~edid~~i~~l~~~i~~l 405 (406) T Consensus 379 YVQp-----------INyPTVpRG~ERLRitPtP~H~~~~id~Lv~AL~~~w~~l 422 (427) T TIGR01821 379 YVQP-----------INYPTVPRGTERLRITPTPVHTDKLIDDLVEALLLVWDRL 422 (427) T ss_pred EEEC-----------CCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHH T ss_conf 5712-----------6888898875024426888988778999999999998861

HHsearch alignment for GI: 254781062 and conserved domain: TIGR01821