>cd07587 ML_beta-AS mammalian-like beta-alanine synthase (beta-AS) and similar proteins (class 5 nitrilases). This subgroup includes mammalian-like beta-AS (EC 3.5.1.6, also known as beta-ureidopropionase or N-carbamoyl-beta-alanine amidohydrolase). This enzyme catalyzes the third and final step in the catabolic pyrimidine catabolic pathway responsible for the degradation of uracil and thymine, the hydrolysis of N-carbamyl-beta-alanine and N-carbamyl-beta-aminoisobutyrate to the beta-amino acids, beta-alanine and beta-aminoisobutyrate respectively. This subgroup belongs to a larger nitrilase superfamily comprised of nitrile- or amide-hydrolyzing enzymes and amide-condensing enzymes, which depend on a Glu-Lys-Cys catalytic triad. This superfamily has been classified in the literature based on global and structure based sequence analysis into thirteen different enzyme classes (referred to as 1-13), this subgroup corresponds to class 5. Members of this superfamily generally form homomeric

Probab=100.00 E-value=1.9e-36 Score=257.55 Aligned_cols=248 Identities=15% Similarity=0.171 Sum_probs=199.2 Q ss_pred CCEEEEEEECCCCC-------CCHHHHHHHHHHHHHHHHHCCCCEEEECCCCCCCC-CHH-HHHCCHHHHHHHH--HHHH Q ss_conf 86289999638836-------88999999999999999985998999166444799-844-5414889999999--9999 Q gi|254780999|r 3 KKLKIAIAQLNPVV-------GDIAGNIAKARRAREEANRQGMDLILFTELFISGY-PPE-DLVFKKSFIQACS--SAID 71 (562) Q Consensus 3 ~~mkIal~Q~n~~~-------gd~~~N~~~i~~~i~~A~~~gadLvvfPEl~LtGY-~~~-Dl~~~~~f~~~~~--~~l~ 71 (562) T Consensus 62 r~vrvg~iqn~i~~pt~~p~~~q~~ai~~~i~~~i~~Aa~~gvni~c~qe~w~mpfafctrek~pw~efae~a~~Gptt~ 141 (363) T cd07587 62 RIVRVGLIQNKIVLPTTAPIAEQREAIHDRIKKIIEAAAMAGVNIICFQEAWTMPFAFCTREKLPWCEFAESAEDGPTTK 141 (363) T ss_pred CEEEEEEEECCCCCCCCCCHHHHHHHHHHHHHHHHHHHHHCCCCEEEEEHHHCCCCEECCCCCCCHHHHCCCCCCCCHHH T ss_conf 47899787404559998668999999999999999999975987998400105872111357776022126677793699 Q ss_pred HHHHHHHHCCCEEEEEEEEEEC---CEEEEEEEEEE-CCEEEEEEEEEEECCCCCCCCCCCCCCCCC-CCEEEECCEEEE Q ss_conf 9999988769789999999888---98789999996-997999887776235543332100377888-761476474562 Q gi|254780999|r 72 TLKSDTHDGGAGIVVGFPRQDQ---EGVLNSVVILD-AGNIIAVRDKINLPNYSEFHEKRTFISGYS-NDPIVFRDIRLG 146 (562) Q Consensus 72 ~La~~~~~~~i~iivG~p~~~~---~~~yNsa~vi~-~G~il~~y~K~~LP~y~~FdE~r~F~~G~~-~~~~~~~g~kiG 146 (562) T Consensus 142 ~~~~~A~k~~mViv~pi~Erd~~~~~~~~NTavVId~dG~~lGkyRK~HIP~~~~f~EkfYf~pGn~G~~Vf~T~~GkIG 221 (363) T cd07587 142 FCQELAKKYNMVIVSPILERDEEHGDTIWNTAVVISNSGNVLGKSRKNHIPRVGDFNESTYYMEGNTGHPVFETQFGKIA 221 (363) T ss_pred HHHHHHHHCCEEEEEECCCCCCCCCCEEEEEEEEECCCCCEEEEEECCCCCCCCCCCEEECCCCCCCCCCCEECCCCEEE T ss_conf 99999998496999842003344587578668999789866422211338999995531213688789875543641166 Q ss_pred ECCCCCCCHHHHHHHHHHHCCCCEEEECCCCCCCCCCHHHHHHHHHHHHHHCCCEEEECCCCCCCC---C------C--- Q ss_conf 011111110168999997147775993155533358078887889998543370464213568876---6------2--- Q gi|254780999|r 147 ILICEDIWKNSNICKHLKKQGAEFLFSLNASPYYHNKLKKRHEIVTGQISHVHLPIIYVNQVGGQD---E------L--- 214 (562) Q Consensus 147 v~ICeDlw~~~~~~~~la~~Gadlii~psASp~~~~k~~~R~~~~~~~a~e~~~~vvy~N~vGg~d---~------l--- 214 (562) T Consensus 222 V~IC~DqwfPe-~aR~~aL~GAEIvf~PtAt~g~~-se~~W~~eqr~hAiAN~~~v~aiNRVG~E~~pne~tsGdg~~a~ 299 (363) T cd07587 222 VNICYGRHHPL-NWLMYGLNGAEIVFNPSATVGAL-SEPMWPIEARNAAIANSYFTVGINRVGTEVFPNEFTSGDGKPAH 299 (363) T ss_pred EEEECCCCCHH-HHHHHHHCCCEEEECCCCCCCCC-CHHHHHHHHHHHHHHCCCCEEEECCCCCCCCCCCCCCCCCCCCC T ss_conf 45631543748-89986416864997545545652-36789998899999708837982355625676544567775343 Q ss_pred ----CCCCCCEEECCCCEEEEECCCCCCCEEEEEEEECCCCC Q ss_conf ----10486435558985999616777637999998335212 Q gi|254780999|r 215 ----IFDGASFCFDGQQQLAFQMKHFSEQNFMTEWHYDQQLS 252 (562) Q Consensus 215 ----vf~G~S~I~d~~G~ii~~~~~f~e~~~i~d~d~d~~~~ 252 (562) T Consensus 300 ~d~g~FYGSSfia~P~G~~~~~lsr~~eglLV~eiDL~~~rq 341 (363) T cd07587 300 KDFGHFYGSSYVAAPDGSRTPGLSRTRDGLLVAELDLNLCRQ 341 (363) T ss_pred CCCCCCCCCCEEECCCCCCCCCCCCCCCCEEEEEECHHHHHH T ss_conf 557642252147889987645778887636999933689999

HHsearch alignment for GI: 254780999 and conserved domain: cd07587