>cd04645 LbH_gamma_CA_like Gamma carbonic anhydrase-like: This family is composed of gamma carbonic anhydrase (CA), Ferripyochelin Binding Protein (FBP), E. coli paaY protein, and similar proteins. CAs are zinc-containing enzymes that catalyze the reversible hydration of carbon dioxide in a two-step mechanism, involving the nucleophilic attack of a zinc-bound hydroxide ion on carbon dioxide, followed by the regeneration of the active site by ionization of the zinc-bound water molecule and removal of a proton from the active site. They are ubiquitous enzymes involved in fundamental processes like photosynthesis, respiration, pH homeostasis and ion transport. There are three evolutionary distinct groups - alpha, beta and gamma carbonic anhydrases - which show no significant sequence identity or structural similarity. Gamma CAs are trimeric enzymes with left-handed parallel beta helix (LbH) structural domain.

Probab=99.82  E-value=3.6e-20  Score=128.20  Aligned_cols=62  Identities=18%  Similarity=0.264  Sum_probs=52.2

Q ss_pred             CCCCCCCCEEEEEEEEEECCCEECCCCEEEECCEEECCEEECCCCEECCC-CEEEEEECCCCE
Q ss_conf             46503577188655565036365697297306878378598888898625-326000079878
Q gi|254780771|r  257 HNVHIGCGCIIVSQVGIAGSTYIGDNVLIGGQCGIAGYLKIGDNVQIASK-SGVLKDIPAGQQ  318 (347)
Q Consensus       257 hn~~iG~~~~~~~~~~~~g~~~ig~~~~ig~~~~i~~~v~ig~~~~i~a~-s~v~~~v~~~~~  318 (347)
T Consensus        76 ~g~~Ig~~~~IG~~a~I~~gv~IG~~~vIgagsvV~~~~~vp~~~v~~G~PAr~ir~~~~~e~  138 (153)
T cd04645          76 HGCTIGDNCLIGMGAIILDGAVIGKGSIVAAGSLVPPGKVIPPGSLVAGSPAKVVRELTDEEI  138 (153)
T ss_pred             ECEEEEEEEEECCCCEECCCCEECCCCEECCCCEECCCCEECCCCEEEECCCEEECCCCHHHH
T ss_conf             241873004770543985699988997994498974897969985999628379715999999