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