>cd04731 HisF The cyclase subunit of imidazoleglycerol phosphate synthase (HisF). Imidazole glycerol phosphate synthase (IGPS) catalyzes the fifth step of histidine biosynthesis, the formation of the imidazole ring. IGPS converts N1-(5'-phosphoribulosyl)-formimino-5-aminoimidazole-4-carboxamide ribonucleotide (PRFAR) to imidazole glycerol phosphate (ImGP) and 5'-(5-aminoimidazole-4-carboxamide) ribonucleotide (AICAR). This conversion involves two tightly coupled reactions in distinct active sites of IGPS. The two catalytic domains can be fused, like in fungi and plants, or peformed by a heterodimer (HisH-glutaminase and HisF-cyclase), like in bacteria.

Probab=94.37 E-value=0.46 Score=27.29 Aligned_cols=143 Identities=13% Similarity=0.190 Sum_probs=74.2 Q ss_pred HHHHHHHCCCCCEEEEEECC----CHHHHHHHHHHCCCCCCEEEEEEECCCC-HHHHHHHHCCCCHHHHHHHHHHHHHHC Q ss_conf 98776521567508997246----0467777653023553104666414777-688765201210488765445421102 Q gi|254780453|r 80 TAAIEHIANMGVAMLTVHAY----PQTMRSAVSVVRDTGICLLAVTVLTSMD-DFDLRESGYEKDISDMVRMRAVQARDI 154 (238) Q Consensus 80 ~~~v~~~~~~g~d~iTvH~~----~~~l~~~~~~~~~~~~~il~Vt~LTS~~-~~~l~~~g~~~~~~~~v~~~a~~a~~~ 154 (238) T Consensus 83 ~~~~~~~l~~GadkVvigs~~~~n~~~~~~~~~~~Gsq-~Iv~siD~k~~~~~~~~v~~~~~~~~~~~~~~~~i~~~~~~ 161 (243) T cd04731 83 LEDARRLLRAGADKVSINSAAVENPELIREIAKRFGSQ-CVVVSIDAKRRGDGGYEVYTHGGRKPTGLDAVEWAKEVEEL 161 (243) T ss_pred HHHHHHHHHCCCCEEEECCCCCCCCCHHHHHHHHCCCC-CEEEEEEEEECCCCCEEEEECCCCCCCHHHHHHHHHHHHHC T ss_conf 79999999779978998984423771435788756993-09999997653789628984698441267899999999846 Q ss_pred CCCCCCC---------CCHHHHHHHHHHC--CCCEEEEECCCCCCCCCCCCCEECCHHHHHH-CCCCEEEECCHHCCCCC Q ss_conf 4431113---------4103445544202--4403551011357865798400369899996-59989999853308888 Q gi|254780453|r 155 GMGGIVC---------SPQEVRMVREIVG--HNMVIVTPGIRMLGSATDGQKRFATPETALK-YGASHIVVSRPIVRAAD 222 (238) Q Consensus 155 g~~GvV~---------s~~ei~~ir~~~~--~~~~~itPGI~~~~~~~~dq~r~~tp~~Ai~-~GaD~iVVGR~I~~a~d 222 (238) T Consensus 162 G~geil~tdI~~DGt~~G~d~~l~~~i~~~~~~piI~sGGi~~~~----------di~~~l~~~~~~gv~~g~~~~~~~~ 231 (243) T cd04731 162 GAGEILLTSMDRDGTKKGYDLELIRAVSSAVNIPVIASGGAGKPE----------HFVEAFEEGGADAALAASIFHFGEY 231 (243) T ss_pred CCCEEEEEEECCCCCCCCCCHHHHHHHHHHCCCCEEEECCCCCHH----------HHHHHHHHCCCEEEEEHHHHHCCCC T ss_conf 987899987257685665799999999986899999988999999----------9999998789829988227676998 Q ss_pred HHHHHHHHHHH Q ss_conf 89999999998 Q gi|254780453|r 223 PVSAAQEFQRA 233 (238) Q Consensus 223 P~~aa~~i~~~ 233 (238) T Consensus 232 ~l~~~k~~L~~ 242 (243) T cd04731 232 TIAELKEYLAE 242 (243) T ss_pred CHHHHHHHHHH T ss_conf 99999999861

HHsearch alignment for GI: 254780453 and conserved domain: cd04731