>cd04823 ALAD_PBGS_aspartate_rich Porphobilinogen synthase (PBGS), which is also called delta-aminolevulinic acid dehydratase (ALAD), catalyzes the condensation of two 5-aminolevulinic acid (ALA) molecules to form the pyrrole porphobilinogen (PBG), which is the second step in the biosynthesis of tetrapyrroles, such as heme, vitamin B12 and chlorophyll. This reaction involves the formation of a Schiff base link between the substrate and the enzyme. PBGSs are metalloenzymes, some of which have a second, allosteric metal binding site, beside the metal ion binding site in their active site. Although PBGS is a family of homologous enzymes, its metal ion utilization at catalytic site varies between zinc and magnesium and/or potassium. PBGS can be classified into two groups based on differences in their active site metal binding site. All of PBGS_aspartate_rich contain an aspartate rich metal binding site with the general sequence DXALDX(Y/F)X3G(H/Q)DG. They also contain an allosteric magnesiu

Probab=100.00 E-value=0 Score=1122.24 Aligned_cols=320 Identities=57% Similarity=0.986 Sum_probs=318.0 Q ss_pred CCCCCCCCCHHHHHHHHCCCCCHHHCCCCEEEECCCCCEEECCCCCCCCCCCHHHHHHHHHHHHHCCCCEEEEEECCCCC Q ss_conf 58563128988999863477888773311666758988110488878632889999999999998889367633025633 Q gi|255764463|r 15 RRMRRNRKSNWIREMVREHRLSVSDLILPIFLTSGEKTVESINSMPDVMRMSIDVAVEKIKQVADLGIPAIAIFPNIPMD 94 (337) Q Consensus 15 ~R~RRlR~~~~iR~Lv~Et~Ls~~dLI~PiFV~eg~~~k~~I~SMPGv~R~Sid~L~~eie~~~~lGI~av~LFp~I~~~ 94 (337) T Consensus 1 tR~RRlR~~~~iR~Lv~Et~L~~~dLI~PlFV~eg~~~~~~I~SMPGi~r~sid~l~~~v~~~~~lGI~av~LFgvi~~~ 80 (320) T cd04823 1 TRPRRNRRTDALRRLVRETTLSPDDLILPLFVHEGENQREPIPSMPGVFRLSIDELLKEAEEAVDLGIPAVALFPVTPPE 80 (320) T ss_pred CCCCCCCCCHHHHHHHHCCCCCHHHCEEEEEEEECCCCCEECCCCCCCCEECHHHHHHHHHHHHHCCCCEEEEEEECCHH T ss_conf 99863579878999986179888997632599428998325689998606589999999999998899789995466555 Q ss_pred CCCCCCCCCCCCCCHHHHHHHHHHHHHCCCEEEECCCCCHHHCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHCCCCEEE Q ss_conf 45544542157653799999999973014479861332710011431001365446289999999999999962897352 Q gi|255764463|r 95 LRNNTGSHIIDPDNLINEGICAIKKNIPNIGIITDVALDPFTIHGHDGILCDGEIVNDETIELISHAAVIQADAGADIIA 174 (337) Q Consensus 95 ~Kd~~GseA~n~dglv~rAIr~IK~~fpdl~vi~DVcLc~YT~hGHcGi~~~g~IdND~Tl~~L~k~Al~~A~AGaDivA 174 (337) T Consensus 81 ~KD~~Gs~A~n~~g~v~rair~iK~~fpdl~vi~DVcLc~YT~hGHcGil~~~~idND~Tl~~L~k~A~~~A~AGaDiVA 160 (320) T cd04823 81 LKSEDGSEAYNPDNLVCRAIRAIKEAFPELGIITDVALDPYTSHGHDGIVRDGGILNDETVEVLCKQALVQAEAGADIVA 160 (320) T ss_pred HCCCCCCCCCCCCCHHHHHHHHHHHHCCCEEEEEEECCCCCCCCCCCEEECCCCCCCHHHHHHHHHHHHHHHHCCCCCCC T ss_conf 33788870058655899999999997898099975024667788842131189675589999999999999964999326 Q ss_pred CCCCCCCHHHHHHHHHHHCCCCCCCEECHHHHHHHHHHCCHHHHHHCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHCCC Q ss_conf 46676779999999998778857730033666435430101675310244677774431572114788988887664089 Q gi|255764463|r 175 PSEMMDGRVQEIRKKLDSHGHINVGIMPYVAKFNSSFYGPYRDAISTRDLLKGDKKTYYLDPANVQEAIREASIDIQESA 254 (337) Q Consensus 175 PSdMMDGrV~aIR~~Ld~~g~~~~~ImsYsaKfaS~fYgPFRdA~~S~p~~~gdr~sYQmd~~n~~eA~~e~~~D~~EGA 254 (337) T Consensus 161 PSdMMDGrV~aIR~~Ld~~gf~~~~ImSYsaKyaS~fYGPFRdA~~S~p~~-gdrktYQmd~~n~~eA~~e~~~D~~EGA 239 (320) T cd04823 161 PSDMMDGRIGAIREALDAEGFTNVSILSYAAKYASAFYGPFRDALGSAPRK-GDKKTYQMDPANSREALREVALDIAEGA 239 (320) T ss_pred CHHHCCCHHHHHHHHHHHCCCCCCEEEEHHHHHHHHCCCHHHHHHHCCCCC-CCCCCCCCCCCCHHHHHHHHHHHHHCCC T ss_conf 343105589999999997799874671245666452023378885157767-8802033799977999999985275199 Q ss_pred CEEEECCCHHHHHHHHHHHHHCCCCEEEEECCHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHHCCCEEEECHHHHHHHHH Q ss_conf 87995531145899999996249989999346189999999988897889999999999977269999820189999998 Q gi|255764463|r 255 DMLLVKPGLPYLDVCFRIKEKFGLPTFAYQVSGEYAMIKAASLQGWINKNDAMMESLLAFKRAGCDGIFTYFAMEAARIL 334 (337) Q Consensus 255 D~lMVKPa~~yLDii~~~k~~~~~P~~aYqVSGEYami~~a~~~g~~d~~~~~~E~l~~~kRAGAd~IitY~A~~~a~~L 334 (337) T Consensus 240 D~lMVKPa~~YLDii~~~k~~~~~Pv~aYqVSGEYaMikaaa~~G~~d~~~~~~Esl~~~kRAGAd~IiTY~A~~~a~~L 319 (320) T cd04823 240 DMVMVKPGMPYLDIIRRVKDEFGVPTFAYQVSGEYAMLKAAAQNGWLDEDKVMLESLLAFKRAGADGILTYFAKEAAEWL 319 (320) T ss_pred CEEEECCCCHHHHHHHHHHHCCCCCEEEEECHHHHHHHHHHHHCCCCCHHHHHHHHHHHHHHCCCCEEEEECHHHHHHHH T ss_conf 87996276218999999997769988999774999999999987997578699999999986599889870399999864 Q ss_pred H Q ss_conf 5 Q gi|255764463|r 335 T 335 (337) Q Consensus 335 ~ 335 (337) T Consensus 320 k 320 (320) T cd04823 320 R 320 (320) T ss_pred C T ss_conf 9

HHsearch alignment for GI: 255764463 and conserved domain: cd04823