>TIGR00735 hisF imidazoleglycerol phosphate synthase, cyclase subunit; InterPro: IPR004651 Histidine is formed by several complex and distinct biochemical reactions catalysed by eight enzymes. Proteins involved in steps 4 and 6 of the histidine biosynthesis pathway are contained in one family. These enzymes are called His6 and His7 in eukaryotes and HisA and HisF in prokaryotes. HisA is a phosphoribosylformimino-5-aminoimidazole carboxamide ribotide isomerase (), involved in the fourth step of histidine biosynthesis. The bacterial HisF protein is a cyclase which catalyzes the cyclization reaction that produces D-erythro-imidazole glycerol phosphate during the sixth step of histidine biosynthesis. The yeast His7 protein is a bifunctional protein which catalyzes an amido-transferase reaction that generates imidazole-glycerol phosphate and 5-aminoimidazol-4-carboxamide. The latter is the ribonucleotide used for purine biosynthesis. The enzyme also catalyzes the cyclization reaction that produces D-erythro-imidazole glycerol phosphate, and is involved in the fifth and sixth steps in histidine biosynthesis. This family describes the histidine biosynthesis protein, HisF. ; GO: 0000107 imidazoleglycerol-phosphate synthase activity, 0000105 histidine biosynthetic process, 0005737 cytoplasm, 0009382 imidazoleglycerol-phosphate synthase complex.

Probab=90.54 E-value=0.42 Score=27.95 Aligned_cols=90 Identities=20% Similarity=0.281 Sum_probs=71.9 Q ss_pred CCCHHHHHHHHCCCCCCHHHHHHHHHHHHCCCCCC---CCCCCCCHHHHHHHHHHHCCCCCCCCCCCCCCHHHHH----- Q ss_conf 22014554320001220121001356640257742---1227661046787666738875302577778998988----- Q gi|254781167|r 133 AVALRNLVKSIKKSGVNGIWIHARKAILKGLSPKD---NRKIPNLDYDIVYEIKKENPDLFIGLNGGLEDMSQAL----- 204 (322) Q Consensus 133 ~~~~~~~~~~~~~~g~~~itiH~Rt~~~~g~s~~~---~~~~~~~~~~~i~~l~~~~~~~~i~~NGdi~~~~~a~----- 204 (322) T Consensus 41 aGDPVeLA~~Y~~eGADELVFLDITAS------~ecPl~R~---~m~~Vv~r~Ae~V-fiPlTVGGGI~~~eD~~GtkiP 110 (312) T TIGR00735 41 AGDPVELAQRYDEEGADELVFLDITAS------SECPLGRE---TMIDVVERTAEKV-FIPLTVGGGIKSIEDVKGTKIP 110 (312) T ss_pred CCCHHHHHHHHHHCCCCEEEECCCCCC------CCCCCCCC---CHHHHHHHHHHHC-CCCEEECCCCCCHHHCCCCCCC T ss_conf 178237899987628958985141136------66788880---1167888875214-5222216888843204564442 Q ss_pred ------HHHH-CCCCEEEECCCCCHHHHHHHHHHH Q ss_conf ------8742-035234412200012439999998 Q gi|254781167|r 205 ------KILP-SVDGVMIGRAAYKNSAMLTTVDEY 232 (322) Q Consensus 205 ------~~l~-~~dgvMigRga~~~P~if~~I~~~ 232 (322) T Consensus 111 alevas~~L~aGADKvSiNTaAv~~P~li~e~a~~ 145 (312) T TIGR00735 111 ALEVASKLLRAGADKVSINTAAVKNPELISEAADR 145 (312) T ss_pred HHHHHHHHHHCCCCEEEECCHHHHCCHHHHHHHHC T ss_conf 78999999854898463284675084478998732

HHsearch alignment for GI: 254781167 and conserved domain: TIGR00735