>TIGR01790 carotene-cycl lycopene cyclase family protein; InterPro: IPR010108 Carotenoids have important functions in photosynthesis, nutrition, and protection against oxidative damage, and are essential components of the photosynthetic membranes in all plants, algae, and cyanobacteria. The final steps in the biosynthesis of carotenoids usually involve the cyclization of lycopene by one of two pathways: the formation of a beta ring by beta-cyclase, or an epsilon ring by epsilon-cyclase. Epsilon-cyclase adds only one ring, forming the monocyclic delta-carotene, whereas beta-cyclase introduces a ring at both ends of lycopene to form the bicyclic beta-carotene . Both enzymes show high sequence similarities, and may have evolved from the same ancestor . This family includes lycopene beta-and epsilion-cyclases, which are involved in the biosynthesis of carotenoids in bacteria and plants, and the related capsanthin capsorubin synthase (Ccs) from plants, which converts antheraxanthin or violaxanthin into capsanthin or capsorubin by a mechanism similar to lycopene cyclization.; GO: 0016705 oxidoreductase activity acting on paired donors with incorporation or reduction of molecular oxygen, 0016117 carotenoid biosynthetic process.

Probab=98.62 E-value=1.2e-07 Score=73.85 Aligned_cols=169 Identities=17% Similarity=0.174 Sum_probs=114.0 Q ss_pred CEEEECCCHHHHHHHHHHH--HCCCCEEEEECCHH-HCCCCCCCCCCCCCCHHHHHHHHHHHH-HHHHHHHHHHHHHHHH Q ss_conf 7889889426899999998--58998999980762-601246670022112248999998630-3999999886314887 Q gi|254780808|r 7 DVIVIGGGHAGCEAAAVAA--KLGASTALITHKTS-TIGSMSCNPAIGGLGKGHLVREIDALD-GLMGRVADAAGIQFRV 82 (626) Q Consensus 7 dViVIGaG~AG~EAA~~~A--r~G~~v~L~~~~~~-~~ael~Cnps~gg~akg~L~~Ei~aLg-g~m~~~aD~~~i~~r~ 82 (626) T Consensus 1 D~~ViGgGpAG~aiA~~l~~a~~gL~V~~i~p~p~f~~----~~~tyg-----~w~~dl~~~~hawl~~l~~~-----~W 66 (419) T TIGR01790 1 DLIVIGGGPAGLAIALELADARPGLRVQLIEPAPPFLP----GNNTYG-----VWDDDLSDLGHAWLADLVEH-----RW 66 (419) T ss_pred CEEEECCCHHHHHHHHHHHHHCCCCEEEEECCCCCCCC----CCCCCC-----CCCCCHHHHHHHHHHHHHCC-----CC T ss_conf 97887477578999999997505871898678887677----687442-----12222327899999988416-----38 Q ss_pred HCC--CCCC-----CCCCHHHHHHHHHHHHHHHHHHHCCCCCEEEHHHHCCCCCCCCCEEEEEECCCCCCCCCCCCCCCC Q ss_conf 307--8785-----553467878499999999999970899689800101120258811322203586334454333466 Q gi|254780808|r 83 LNV--KKGP-----AVRGPRTQADRELYRLAMQREILSQENLDVIQGEVAGFNTEKNIISSIVMQDNSMIRCSTVVLTTG 155 (626) Q Consensus 83 ln~--skGp-----Av~alraqvDR~~fs~~vt~~l~~~pni~i~~~eV~~l~~~~~~~~~v~~~~g~~~~~~~viiatG 155 (626) T Consensus 67 ~~~~~y~~~~~~~~L~~~Y-~~~~~~~L~~~l~~~~~~~sG~~~~~~ka~~~~~~~~~~~~v~~~~g~~i~Ar~V~Da~G 145 (419) T TIGR01790 67 SDAYEYRFPEEPIKLGRAY-GSVDRAQLHEELLQKCPEGSGVLWLEAKAIKVEADAVSLSLVECAGGQRIQARLVIDARG 145 (419) T ss_pred CCEEEECCCCCCHHCCCCC-EEECHHHHHHHHHHHHHCCCCEEEEHHHHHHHHHHHCCCCEEECCCCEEEEEEEEEECCC T ss_conf 9806883873430105665-000158999999986200376133013566665440551114428973784007883257 Q ss_pred CCCHHHHHHHHCCCCCCCCCCCCCCCCCCHHHHHHHHC Q ss_conf 43101344432023322247511133100001011200 Q gi|254780808|r 156 TFLRGVIHIGKLKIPAGRMGDSPSNSLFNSFMKFDFDT 193 (626) Q Consensus 156 tfl~g~~~~g~~~~~~gr~~~~~s~~ls~~l~~~~~~~ 193 (626) T Consensus 146 ~~~-G~l~--~~~~~~~~~g~Q~ayG~~~rl~~~P~~~ 180 (419) T TIGR01790 146 FKP-GKLV--QYEKASLAVGYQAAYGVEVRLSEPPHGP 180 (419) T ss_pred CCC-CCEE--CCCCCCCCCEEEEEEEEEEEEECCCCCC T ss_conf 776-5101--1256676421213132778872478799

HHsearch alignment for GI: 254780808 and conserved domain: TIGR01790