>cd04723 HisA_HisF Phosphoribosylformimino-5-aminoimidazole carboxamide ribonucleotide (ProFAR) isomerase (HisA) and the cyclase subunit of imidazoleglycerol phosphate synthase (HisF). The ProFAR isomerase catalyzes the fourth step in histidine biosynthesis, an isomerisation of the aminoaldose moiety of ProFAR to the aminoketose of PRFAR (N-(5'-phospho-D-1'-ribulosylformimino)-5-amino-1-(5''-phospho-ribosyl)-4-imidazolecarboxamide). In bacteria and archaea, ProFAR isomerase is encoded by the HisA gene. The 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 pl

Probab=96.58  E-value=0.03  Score=35.00  Aligned_cols=31  Identities=32%  Similarity=0.278  Sum_probs=15.9

Q ss_pred             CCEEECCCCCCCHHHHHHHHHCCCCEEECCCC
Q ss_conf             97485346888677988874036752410200
Q gi|254780434|r   56 NPLGMAAGYDKNAEVPIELLKLGFGFVEIGTV   87 (362)
Q Consensus        56 nPiglAaG~dk~~~~~~~l~~~G~G~v~~kti   87 (362)
T Consensus        79 ~pi~vGGGI-rs~~~~~~~l~~Gadkvvigs~  109 (233)
T cd04723          79 LGLWVDGGI-RSLENAQEWLKRGASRVIVGTE  109 (233)
T ss_pred             CCEEEECCC-CCHHHHHHHHHCCCCEEECCCH
T ss_conf             988997022-7699999998607201524510