>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=99.95 E-value=3.2e-26 Score=178.53 Aligned_cols=313 Identities=21% Similarity=0.234 Sum_probs=199.2 Q ss_pred CCCCCCHHHHHHHHHHHHHCCCCCHHHHH--HH-HHHHHHHHHHHHHHHHCCCCHHHEEEECCHHHHHHHHHHHHHHHCC Q ss_conf 88898989999999999642885236589--99-9999999999999997298977898866853876445565442102 Q gi|254781091|r 11 ATAPLLEVVRQSFVKSLDFYGNPSSVHKE--GQ-KTRLYIEESRRIIADFCGAKPDHVVFTSSATEAANWVLTPHFYQGS 87 (383) Q Consensus 11 attp~~~~v~~a~~~~~~~~~n~~s~h~~--~~-~~~~~~e~aR~~ia~~~g~~~~ei~ft~~~T~a~~~~i~~~~~~~~ 87 (383) T Consensus 58 GMgq-Hp~Vl~Am~~~~~~~GaGaGGTRNIsGtn~~~v~LE---aELAdLH~KE~-ALvFtSg-yVaNda~L~tL~---- 127 (427) T TIGR01821 58 GMGQ-HPKVLQAMHEALDKVGAGAGGTRNISGTNIYHVELE---AELADLHGKES-ALVFTSG-YVANDATLATLA---- 127 (427) T ss_pred HCCC-CHHHHHHHHHHHHHCCCCCCCCCCCCCCCHHHHHHH---HHHHHHCCCCH-HHHHHHH-HHHHHHHHHHHH---- T ss_conf 0488-654798899999963889987536566777899999---99975517311-3567788-999999999999---- Q ss_pred CCCCCCEEEECCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHCCCCCCEEEEECCCCCCCCCCCHHHHH Q ss_conf 24566458733321221112222222222222222222111023455324431135653265403434443332112356 Q gi|254781091|r 88 HKISIDSLYISAIEHPAVYAGGHFPSHKIHKIPVLSKGIVDIQALTDFLEQRNSTCGIPMIAVMFVNNETGVIQPIKEIA 167 (383) Q Consensus 88 ~~~~~~~ii~s~~eH~s~~~~~~~~~~~v~~v~~~~~g~i~~~~l~~~i~~~t~~~~~~LVs~~~~~n~tG~i~pi~~I~ 167 (383) T Consensus 128 k~~P~~~ifSD~LNHASMI~GIr~S~~~k~iFrHN-----D~~hLe~LL~~~d-~~~PKiIAFESvYSMDGd~aPi~eiC 201 (427) T TIGR01821 128 KIIPGCVIFSDELNHASMIEGIRRSGAEKFIFRHN-----DVAHLEKLLQSVD-PNAPKIIAFESVYSMDGDIAPIKEIC 201 (427) T ss_pred HHCCCEEEEECCCCHHHHHHHHHHCCCCEEEEECC-----CHHHHHHHHHHCC-CCCCCEEEEEEHCCCCCCCCCHHHHH T ss_conf 87088589836556356999987478950563059-----9789999986477-99895688610001678726678896 Q ss_pred HHHCCCCCCCCCCCCCCCCCCCCCCCCCCCEEEEECCCCCCCCCCCHHHHCCC--------C--------------CCCC Q ss_conf 52034465334443233655444443343106873054332234320110145--------7--------------4201 Q gi|254781091|r 168 QIVKEYQGILVVDAVQAAGRIPLSIEEIKADFLIISSHKLGAPVGAGALVFRE--------D--------------ILLP 225 (383) Q Consensus 168 ~~~~~~g~~~~vD~aqa~g~~~id~~~~~~D~~~~S~hK~~GP~G~G~L~~r~--------~--------------~~~~ 225 (383) T Consensus 202 DlA~kYGALTy~DEVHAVG--------------------lYGprGgGI-aErddfeshrasGiatPktndkGGakt~mhr 260 (427) T TIGR01821 202 DLADKYGALTYLDEVHAVG--------------------LYGPRGGGI-AERDDFESHRASGIATPKTNDKGGAKTLMHR 260 (427) T ss_pred HHHHHHCCCCEECCEEEEC--------------------CCCCCCCCC-CHHHHCCHHCCCCCCCCCCCCCCCCEECCCC T ss_conf 6888718863001146533--------------------658888851-2022110000157677765766652001110 Q ss_pred CCCCCC---------CC----------CCCCCCCC-----CCCCCCCCCHHHHHHCCCCH-HHHHHHHHHHHHHHHHHHH Q ss_conf 221224---------77----------42122222-----22112221001221100100-2456532101233334444 Q gi|254781091|r 226 SPLLRG---------GD----------QEKGQRAG-----TENYAVIGGFAVAAQQMVKD-IQKRSSRVFAIRDYLEQEL 280 (383) Q Consensus 226 ~p~~~G---------g~----------~e~~~~~G-----T~~~~~i~~~~~al~~~~~~-~~~~~~~~~~L~~~l~~~l 280 (383) T Consensus 261 iDii~GTLaKAFG~~GGYIa~~~~L~D~~RS~ApGFIFTTsLPP~~~aGA~asIRhLK~~eg~~lR~~hQ~~~~~lK~~L 340 (427) T TIGR01821 261 IDIIEGTLAKAFGVVGGYIAASRKLIDAVRSYAPGFIFTTSLPPAIAAGALASIRHLKESEGQDLRRAHQERVKRLKKLL 340 (427) T ss_pred CCCCCCCCHHHCCCCCCEEECCCCCEEEEEECCCCCHHHHHHHHHHHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHH T ss_conf 00001651122344453020552213200003784212421558999999999999751376778999989999999999 Q ss_pred HHHHHCCCCCCCCCCCCCCEEEEEECC-CCHHHHHH-HHHHCCCEEEECHHHCCCCCCCCHHHHHCCCCCCCCEEEEEEC Q ss_conf 432100012232211036522898579-99999999-9875896998711338864331014676288874765999907 Q gi|254781091|r 281 KKLIPNIIIYGKDAERISNTCCFSIPF-LKAEVLQI-ALDLEGIAVSAGSACSSGKIKKNHVLAAMGFDTSQGAVRVSCG 358 (383) Q Consensus 281 ~~~~~~~~i~~~~~~~~~~i~~~~~~~-~~~~~v~~-~l~~~gI~v~~G~~C~~~~~~~~~vl~~~g~~~~~g~vRiS~~ 358 (383) T Consensus 341 ~~~--Gl----Pv~~~pSHIvPv~iGdA~~~k~~SD~LL~~hGIYV-------QpINyPT---VpRG~E----RLRitPt 400 (427) T TIGR01821 341 EAL--GL----PVIDNPSHIVPVIIGDAAKCKKVSDLLLNKHGIYV-------QPINYPT---VPRGTE----RLRITPT 400 (427) T ss_pred HHC--CC----CCCCCCCEEEEEEECCHHHHHHHHHHHHHHCCCEE-------ECCCCCC---CCCCCC----CCCCCCC T ss_conf 957--77----75488773887676686889899898887178157-------1268888---988750----2442688 Q ss_pred CCCCHHHHHHHHHHHHHHHHHH Q ss_conf 8889999999999999999862 Q gi|254781091|r 359 DSTTQEDIDIFLNALQKIIRTS 380 (383) Q Consensus 359 ~~nT~~dId~l~~~L~~iv~~~ 380 (383) T Consensus 401 P~H~~~~id~Lv~AL~~~w~~l 422 (427) T TIGR01821 401 PVHTDKLIDDLVEALLLVWDRL 422 (427) T ss_pred CCCCHHHHHHHHHHHHHHHHHH T ss_conf 8988778999999999998861

HHsearch alignment for GI: 254781091 and conserved domain: TIGR01821