HHsearch alignment for GI: 254780669 and conserved domain: TIGR00034
>TIGR00034 aroFGH phospho-2-dehydro-3-deoxyheptonate aldolase; InterPro: IPR006219 Members of this group catalyze the first enzymatic reaction of the shikimate pathway. The common (shikimate) pathway links metabolism of carbohydrates to biosynthesis of aromatic amino acids phenylalanine, tyrosine, tryptophan, and derivatives in microorganisms and in plants. In a sequence of seven enzymatic reactions, D-erythrose 4-phosphate (E4P), an intermediate of the pentose phosphate pathway, and phosphoenol pyruvate (PEP), a glycolytic intermediate, are converted to chorismate. The pathway begins with the stereospecific condensation of E4P and PEP to yield 7-phospho 2-dehydro 3-deoxy-D-arabino-heptulosonate (DAHP), catalyzed by 3-deoxy-7-phosphoheptulonate synthase (DAHPS) (EC 2.5.1.54, formerly EC 4.1.2.15). The divalent metal cation requirement of this enzyme can be satisfied by a broad range of metals . A Cys residue in a Cys-X-X-His motif has been identified as part of a metal binding site . In Escherichia coli, the enzyme exists in three isoforms, each specifically inhibited by one of the three aromatic amino acids. DAHP synthetases fall into two classes, class I (represented by this entry) and class II (represented by PIRSF015573 from PIRSF). Class I was believed to be limited to microorganisms and class II to plants. However, a more recent study showed that class II also contains enzymes from a microbial eukaryote and several bacteria . Brick and Woodard proposed that the difference between the two classes lies in their metal ion requirement for activity. Whereas class I requires no metal cation, class II is dependent on a metal cation for activity. However, recently a class I DAHP synthase from Thermotoga maritima has been purified, characterised, and shown to be a metalloenzyme . The three-dimentional structures of DAHP synthases have been determined , , , , . The DAHPS(Phe) monomer is a (beta/alpha)8 barrel with an additional N-terminal beta strand and helices and an extra beta sheet near the C terminus . The active site is located in a cleft at the carboxyl end of the barrel . The allosteric feedback inhibition binding site of DAHPS(Phe) is composed of residues from two adjacent subunits of a tight dimer and is at least 20 angstroms away from the closest active site . The absence of the shikimate pathway in animals makes it an attractive target for nontoxic herbicidal, antimicrobial, and antifungal agents. The nontoxic herbicide glyphosphate competitively inhibits 3-phosphoshikimate 1-carboxyvinyltransferase, the sixth enzymatic reaction of the pathway.; GO: 0003849 3-deoxy-7-phosphoheptulonate synthase activity, 0009073 aromatic amino acid family biosynthetic process.
Probab=99.80 E-value=1.5e-19 Score=149.52 Aligned_cols=244 Identities=24% Similarity=0.374 Sum_probs=175.9
Q ss_pred CCEEECCCCCEEEEECCCCCCCHHHHHHHHHHHHHHHHHCC--CCEEEECCCCCCCCCCCCCCCCC--------------
Q ss_conf 72797699706999548634999999999999999655339--97066015576886663222456--------------
Q gi|254780669|r 35 NQVTFSNEQRFVLIAGPCQIESHDHAFMIAEKLYAICQSLN--IGLVYKSSFDKANRSSLAGKRGV-------------- 98 (301)
Q Consensus 35 ~~i~ig~~~~l~iIAGPCsiES~e~~~~~A~~lk~~~~~~~--~~~ifK~sfdKanRtS~~sfrG~-------------- 98 (301)
T Consensus 42 ~~I~~G~D~RLLVViGPCSiHDP~AA~eYA~RL~~L~~~l~~~L~IvMRvYfEKP-RTtV-GWKGLINDP~ln~sf~in~ 119 (348)
T TIGR00034 42 ADILAGKDDRLLVVIGPCSIHDPEAAIEYATRLKKLREKLKDDLEIVMRVYFEKP-RTTV-GWKGLINDPDLNGSFRINK 119 (348)
T ss_pred HHHHCCCCCEEEEEECCCCCCCHHHHHHHHHHHHHHHHHHCCCCEEEEEEEECCC-CCCC-CCCCCCCCCCCCCCCCHHH
T ss_conf 9985799976899975888574689999999999999875037607876431698-7010-3444458888888522025
Q ss_pred CCHHHHHHHHHHHHHHCCEEEEECCCHHHHHHHHHHCCEEEECHHHCCCHH--HHH-HHHH-CCCEEEEECCCCCCHHHH
Q ss_conf 712488899988665287688522889999876502157882257628999--999-9850-597799836777899999
Q gi|254780669|r 99 GLKKGREIFRDLKKKYGFPILTDVHTEQQCEAIADSVDILQIPALLCRQTD--LLT-AAAQ-TGRVINVKKGQFLSPWEM 174 (301)
Q Consensus 99 Gle~gL~il~e~k~~~glpv~TeV~~~~~~e~~~~~vDilQIgA~~~rqtd--Ll~-a~a~-t~kpV~iKkgq~~s~~e~ 174 (301)
T Consensus 120 GL~iARkLL~~~-~~~GlP~a~EfLD~~sPQylADl~SwGAIGA---RTTESQ~HRrElASGLS~PVGFKNGTDG~~~vA 195 (348)
T TIGR00034 120 GLRIARKLLLDL-NNLGLPIAGEFLDMISPQYLADLVSWGAIGA---RTTESQVHRRELASGLSCPVGFKNGTDGNLKVA 195 (348)
T ss_pred HHHHHHHHHHHH-HHCCCCCCCCCCCCCCHHHHHHHHHHHCCCC---CCCHHHHHHHHHHHHCCCCCCCCCCCCCCHHHH
T ss_conf 689999999888-6315763443124666378999997513220---122116679998754566334313578748899
Q ss_pred HHHH------------------HHHHHCCCCCEEEEECCCCCCCHHHCCCCCCC-HHHHHHCCC--EEECHHHHHHHCCC
Q ss_conf 9999------------------99972587808995146544401000000010-688851871--68711777421223
Q gi|254780669|r 175 HNIL------------------QKLHAHGAKDVLFCERGTSFGYNTLVTDMRSI-PIMTSMGVP--VIFDASHSVQQPGI 233 (301)
Q Consensus 175 ~~a~------------------eki~~~Gn~~i~lcERG~~fgy~~lvvD~~~i-~~lk~~~~P--Vi~D~SHs~q~p~~ 233 (301)
T Consensus 196 iDA~~AA~~~H~Fls~~k~G~~ai~~T~GN~~~HiILRGG~~GPNY~a~~V~~~~~~l~~~g~~~~lMiD~SHg------ 269 (348)
T TIGR00034 196 IDAIRAAAAPHYFLSVTKDGQMAIVQTSGNPDGHIILRGGKKGPNYDAADVAEVKKQLEKAGLPEHLMIDFSHG------ 269 (348)
T ss_pred HHHHHHHHCCCEEECCCCCCCEEEEECCCCCCCEEEECCCCCCCCCCHHHHHHHHHHHHHCCCCCCEEEEECCC------
T ss_conf 99999960698373126877367875267985248861687676889888999999997358998468871136------
Q ss_pred CCCCC-CCCHHHHHHHHHHHHHHC---CCEEEEEECCCHHHCCC------CC----CCCCCHHHHHHHHHHH
Q ss_conf 45321-263889999999999718---98899983698334797------82----0186889999999999
Q gi|254780669|r 234 HGNCS-GGERQYIVPLAKAAVAIG---IAGIFLETHQDPDNAPS------DG----PNMINIKDLPKLLSQL 291 (301)
Q Consensus 234 ~~~~~-gG~r~~v~~la~aa~a~G---~dGlfiE~Hp~P~~Als------D~----~q~l~l~~l~~ll~~l 291 (301)
T Consensus 270 NS~Kd~~rQ~~V~~~v~~-QI~~G~~~i~GvMiES~l~EG~Q~~~~~~L~YG~SiTDaCigWe~t~~lL~~L 340 (348)
T TIGR00034 270 NSNKDFRRQPDVAEDVCE-QIANGSKAIIGVMIESFLVEGNQSIPGEGLKYGQSITDACIGWEDTEALLRQL 340 (348)
T ss_pred CCCCCCCCHHHHHHHHHH-HHHCCCCEEEEEEEEEECCCCCCCCCCCCCCCCCEECCCCCCHHHHHHHHHHH
T ss_conf 775000231789999999-97353514787787875137622678877415621204768841089999999