>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=99.43 E-value=1.8e-11 Score=100.36 Aligned_cols=318 Identities=24% Similarity=0.269 Sum_probs=200.9 Q ss_pred CCHHHHHHHHCCCCCCCCCCCCCCCCCCCCH-HHHHHHHHHHHHHHHHCCCCCEECCCHHHHHHHHHHHHHHHCCCCEEE Q ss_conf 2989999830510288657988875336006-799999999999998718863010000167999999998315487488 Q gi|254780349|r 45 VSRAVLEAQGSILTNKYAEGYPSKRYYGGCQ-YVDDIENIAIERAKKLFNVNFVNVQSHSGSQMNQGVFLALMHPGDSFM 123 (433) Q Consensus 45 ~S~~v~~~l~S~l~nkyaeG~pg~ryy~G~~-~~d~iE~la~~~a~~lF~a~~anvqp~SG~~An~av~~ALl~pGD~Il 123 (433) T Consensus 61 qHp~Vl~Am~~~~~-~~GaGaGGTRNIsGtn~~~v~LEaE----LAdLH~KE~ALv-FtSgyVaNda~L~tL~k~~P~~~ 134 (427) T TIGR01821 61 QHPKVLQAMHEALD-KVGAGAGGTRNISGTNIYHVELEAE----LADLHGKESALV-FTSGYVANDATLATLAKIIPGCV 134 (427) T ss_pred CCHHHHHHHHHHHH-HCCCCCCCCCCCCCCCHHHHHHHHH----HHHHCCCCHHHH-HHHHHHHHHHHHHHHHHHCCCEE T ss_conf 86547988999999-6388998753656677789999999----975517311356-77889999999999998708858 Q ss_pred ECCCCCCCCCCC--CCCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHH---HCCCEEEEECCCCCCCCCHH---HHHH Q ss_conf 123344841114--766543333322013665832356598999999986---04667897055243536379---9998 Q gi|254780349|r 124 GLSLDSGGHLTH--GSSVNMSGKWFKAIPYNVRKEDGLLDMHEIESLAIE---YNPKLIIVGGTAYSRVWDWE---RFRS 195 (433) Q Consensus 124 ~~~l~~GGHlsh--g~~~~~~g~~~~~~~y~~d~~~~~ID~d~~~~~a~~---~kPklIi~G~S~y~~~~d~~---~l~e 195 (433) T Consensus 135 ifS-D~LNHASMI~GIr~---S~~~k~iF----rH---ND~~hLe~LL~~~d~~~PKiIAFE-SvYSMDGd~aPi~eiCD 202 (427) T TIGR01821 135 IFS-DELNHASMIEGIRR---SGAEKFIF----RH---NDVAHLEKLLQSVDPNAPKIIAFE-SVYSMDGDIAPIKEICD 202 (427) T ss_pred EEE-CCCCHHHHHHHHHH---CCCCEEEE----EC---CCHHHHHHHHHHCCCCCCCEEEEE-EHCCCCCCCCCHHHHHH T ss_conf 983-65563569999874---78950563----05---997899999864779989568861-00016787266788966 Q ss_pred HHHHCCCEEEECCCCHHHHH-------HHHC-C----CCC--------------CCC-CCEEEECCCCCCCCCCCEEEEE Q ss_conf 86417978991862012443-------2000-1----232--------------200-2356740456522567448983 Q gi|254780349|r 196 IADSIGAYLMADISHISGLV-------VGGQ-H----PSP--------------VPH-CHIVTTTTHKSLRGPRGGLIMT 248 (433) Q Consensus 196 Ia~~~ga~l~~D~aH~~GLI-------a~g~-~----~~P--------------l~~-ADvvt~sTHKtl~GPrgGiI~~ 248 (433) T Consensus 203 lA~kYGALTy~DEVHAVGlYGprGgGIaErddfeshrasGiatPktndkGGakt~mhriDii~GTLaKAF-G~~GGYIa~ 281 (427) T TIGR01821 203 LADKYGALTYLDEVHAVGLYGPRGGGIAERDDFESHRASGIATPKTNDKGGAKTLMHRIDIIEGTLAKAF-GVVGGYIAA 281 (427) T ss_pred HHHHHCCCCEECCEEEECCCCCCCCCCCHHHHCCHHCCCCCCCCCCCCCCCCEECCCCCCCCCCCCHHHC-CCCCCEEEC T ss_conf 8887188630011465336588888512022110000157677765766652001110000016511223-444530205 Q ss_pred CCCCHHHHCCHHHCHHH-HHHHHHHHHHHHHHHH-HHHHCHHHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCEEEE Q ss_conf 36205650166465432-2344556668999999-997356489999999988899999986168523345888981263 Q gi|254780349|r 249 NHADLAKKINSAIFPGL-QGGPFMHSIAAKAVAF-GEALSSEFRDYAKQIVLNSQALAKKLQFLGFDIVSGGTDNHLMLV 326 (433) Q Consensus 249 ~~~e~~~~i~~avfPg~-qg~~~~~~iaa~aval-~Ea~~~~f~~Ya~qvv~NA~~La~~L~~~G~~vv~ggTd~H~vlv 326 (433) T Consensus 282 ~~-~L~D~~RS-~ApGFIFTTsLPP~~~aGA~asIRhLK~~eg~~lR~~hQ~~~~~lK~~L~~~GlPv~~--~pSHIvPv 357 (427) T TIGR01821 282 SR-KLIDAVRS-YAPGFIFTTSLPPAIAAGALASIRHLKESEGQDLRRAHQERVKRLKKLLEALGLPVID--NPSHIVPV 357 (427) T ss_pred CC-CCEEEEEE-CCCCCHHHHHHHHHHHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHHHHCCCCCCC--CCCEEEEE T ss_conf 52-21320000-3784212421558999999999999751376778999989999999999957777548--87738876 Q ss_pred CCCCCCCCHHHH-HHHHHHCCEEE---ECCCCCCCCCCCCCCCCCCCCCHHHHHCCCCHHHHHHHHHHHHHHHH Q ss_conf 166556767999-99888567188---03789989999888985122466673079998999999999999960 Q gi|254780349|r 327 DLRSKRMTGKRA-ESILGRVSITC---NKNSIPFDPESPFITSGIRLGTPSGTTRGFKEKDFEYIGELIAQILD 396 (433) Q Consensus 327 dl~~~~~~G~~a-~~~Le~~gI~~---Nkn~iP~D~~~~~~~sGiRlGT~aiTtrG~~e~em~~iA~li~~~L~ 396 (433) T Consensus 358 ~iGdA~~~-k~~SD~LL~~hGIYVQpINyPTVpRG~ER------LRitPtP~----H~~~~id~Lv~AL~~~w~ 420 (427) T TIGR01821 358 IIGDAAKC-KKVSDLLLNKHGIYVQPINYPTVPRGTER------LRITPTPV----HTDKLIDDLVEALLLVWD 420 (427) T ss_pred EECCHHHH-HHHHHHHHHHCCCEEECCCCCCCCCCCCC------CCCCCCCC----CCHHHHHHHHHHHHHHHH T ss_conf 76686889-89989888717815712688889887502------44268889----887789999999999988

HHsearch alignment for GI: 254780349 and conserved domain: TIGR01821