>cd00493 FabA_FabZ FabA/Z, beta-hydroxyacyl-acyl carrier protein (ACP)-dehydratases: One of several distinct enzyme types of the dissociative, type II, fatty acid synthase system (found in bacteria and plants) required to complete successive cycles of fatty acid elongation. The third step of the elongation cycle, the dehydration of beta-hydroxyacyl-ACP to trans-2-acyl-ACP, is catalyzed by FabA or FabZ. FabA is bifunctional and catalyzes an additional isomerization reaction of trans-2-acyl-ACP to cis-3-acyl-ACP, an essential reaction to unsaturated fatty acid synthesis. FabZ is the primary dehydratase that participates in the elongation cycles of saturated as well as unsaturated fatty acid biosynthesis, whereas FabA is more active in the dehydration of beta-hydroxydecanoyl-ACP. The FabA structure is homodimeric with two independent active sites located at the dimer interface.

Probab=100.00 E-value=1.4e-38 Score=251.88 Aligned_cols=128 Identities=48% Similarity=0.730 Sum_probs=119.8 Q ss_pred CCCCCEEEEEEEEEEECCCEEEEEEEECCCCHHHCCCCCCCCCCCHHHHHHHHHHHHHHHHHHCCCC--CCCEEEEEEEC Q ss_conf 9997505478999984697499999826888313134799950225669999863463454432997--76302677523 Q gi|254780770|r 21 PHRYPFLLVDKVVNIQRDESAIGIKNVTFNEPHFMGHFPGRPVMPGVLILEGMAQTAGAICAIHNGF--DQYAPPYLMSI 98 (161) Q Consensus 21 Phr~Pfl~ID~i~~~~~g~~~~g~k~v~~~e~ff~gHFp~~PvmPGvLliE~maQ~~~~l~~~~~~~--~~~~~~~l~~i 98 (161) T Consensus 1 Phr~p~lliD~v~~~~~~~~~~~~k~v~~~~~ff~gHfp~~pv~Pg~l~iE~~aQ~~~~~~~~~~~~~~~~~~~~~l~~~ 80 (131) T cd00493 1 PHRYPMLLVDRVLEIDPGGRIVAEKNVTPNEPFFQGHFPGDPVMPGVLGIEAMAQAAAALAGLLGLGKGNPPRLGYLAGV 80 (131) T ss_pred CCCCCEEEEEEEEEECCCCEEEEEEEECCCCCEEECCCCCCCCCCHHHHHHHHHHHHHHHHHHCCCCCCCCCCEEEEEEE T ss_conf 98997688999999869998999999279977477205799966603799999999999974113344778835899971 Q ss_pred CCCEEEEEEEECCEEEEEEEEEEEECCEEEEEEEEEECCEEEEEEEEEEE Q ss_conf 64136002212888999999997207779999999999999998999999 Q gi|254780770|r 99 DKARFRKPVFPGDRLEYHVNKVRNRVDLWKFQCCAKVENTVVAEAEICAM 148 (161) Q Consensus 99 ~~~kF~~~V~PGd~L~i~~~i~~~~~~~~~~~~~~~v~~~~va~a~l~~~ 148 (161) T Consensus 81 ~~~kf~~~v~Pgd~l~i~v~~~~~~~~~~~~~~~~~v~~~~v~~~~l~~~ 130 (131) T cd00493 81 RKVKFRGPVLPGDTLTLEVELLKVRRGLGKFDGRAYVDGKLVAEAELMAA 130 (131) T ss_pred EEEEEECEECCCCEEEEEEEEEEEECCEEEEEEEEEECCEEEEEEEEEEE T ss_conf 38899340479989999999999889999999999999999999999970

HHsearch alignment for GI: 254780770 and conserved domain: cd00493