>TIGR01162 purE phosphoribosylaminoimidazole carboxylase, catalytic subunit; InterPro: IPR000031 Phosphoribosylaminoimidazole carboxylase is a fusion protein in plants and fungi, but consists of two non-interacting proteins in bacteria, PurK and PurE. PurK, N5-carboxyaminoimidazole ribonucleotide (N5_CAIR) synthetase, catalyzes the conversion of 5-aminoimidazole ribonucleotide (AIR), ATP, and bicarbonate to N5-CAIR, ADP, and Pi. PurE converts N5-CAIR to CAIR, the sixth step of de novo purine biosynthesis. In the presence of high concentrations of bicarbonate, PurE is reported able to convert AIR to CAIR directly and without ATP. Some members of this family contain two copies of this domain . The crystal structure of PurE indicates a unique quaternary structure that confirms the octameric nature of the enzyme .; GO: 0004638 phosphoribosylaminoimidazole carboxylase activity, 0006189 'de novo' IMP biosynthetic process, 0009320 phosphoribosylaminoimidazole carboxylase complex.

Probab=93.45  E-value=0.18  Score=30.06  Aligned_cols=58  Identities=21%  Similarity=0.276  Sum_probs=40.8

Q ss_pred             EEEECCCCCCCCCCHHHHHHHHHHHCCCCEEEEECCCC--HH-HHHHHHHHHCCCCCCEEEECCE
Q ss_conf             99944899989983179999999974996589971144--03-7999999734787763898998
Q gi|254780968|r   19 VLFMKGTPTSPRCGFSGKVVQVLDSLGVSYKGIDVLAD--DA-LRQSIKEYSNWPTIPQLYVKGD   80 (106)
Q Consensus        19 vifskgt~~~p~C~~c~~ak~lL~~~~i~y~~~dv~~d--~~-~~~~l~~~sg~~TvPqIFv~G~   80 (106)
T Consensus         2 ~iIMGS~SD---~~~m~~a~~~L~~fgi~~e~~V~SAHRTP~~~~~ya~~a~-~~G~P~ViIAgA   62 (159)
T TIGR01162         2 GIIMGSDSD---LETMKKAAEILEEFGIPYELRVVSAHRTPELMFEYAKEAE-ERGIPKVIIAGA   62 (159)
T ss_pred             EEECCCCCC---HHHHHHHHHHHHHCCCCEEEEEECCCCCHHHHHHHHHHHH-HCCCCEEEEECC
T ss_conf             685367254---7899999999985599667898606778088999999998-678997998403