HHsearch alignment for GI: 254780347 and conserved domain: TIGR00187
>TIGR00187 ribE riboflavin synthase, alpha subunit; InterPro: IPR001783 The following proteins have been shown , to be structurally and evolutionary related: Riboflavin synthase alpha chain (2.5.1.9 from EC) (RS-alpha) (gene ribC in Escherichia coli, ribB in Bacillus subtilis and Photobacterium leiognathi, RIB5 in yeast. This enzyme synthesises riboflavin from two moles of 6,7- dimethyl-8-(1'-D-ribityl)lumazine (Lum), a pteridine-derivative. Photobacterium phosphoreum lumazine protein (LumP) (gene luxL). LumP is a protein that modulates the colour of the bioluminescence emission of bacterial luciferase. In the presence of LumP, light emission is shifted to higher energy values (shorter wavelength). LumP binds non-covalently to 6,7-dimethyl-8-(1'-D-ribityl)lumazine. Vibrio fischeri yellow fluorescent protein (YFP) (gene luxY). Like LumP, YFP modulates light emission but towards a longer wavelength. YFP binds non-covalently to FMN. These proteins seem to have evolved from the duplication of a domain of about 100 residues. In its C-terminal section, this domain contains a conserved motif [KR]-V-N-[LI]-E which has been proposed to be the binding site for lumazine (Lum) and some of its derivatives. RS-alpha which binds two molecules of Lum has two perfect copies of this motif, while LumP which binds one molecule of Lum, has a Glu instead of Lys/Arg in the first position of the second copy of the motif. Similarly, YFP, which binds to one molecule of FMN, also seems to have a potentially dysfunctional binding site by substitution of Gly for Glu in the last position of the first copy of the motif. .
Probab=99.81 E-value=1.4e-20 Score=140.97 Aligned_cols=88 Identities=27% Similarity=0.335 Sum_probs=83.4
Q ss_pred EEEECCCCHHHHHHHCCCCCE------EEEEEECCCCCCCEECCCCEEEEEEEEEEEEEECCCEEEEEEEHHHHCCCCHH
Q ss_conf 245401001101110023313------79875134211210023571998234578774168549999844433013300
Q gi|254780347|r 102 LVSGHIDGTVEILFLDFIGDS------MYCRLSLPHNLEQFIAVKGSVCLNGVSLTVNLVGKNFFDVLLIRHTIEETTWK 175 (204)
Q Consensus 102 ~v~GhVd~~~~i~~i~~~~~~------~~~~i~~~~~~~~~l~~KgsI~idGvSLTV~~~~~~~f~v~lIp~Tl~~T~l~ 175 (204)
T Consensus 1 MFTGIi~~~g~~~s~~~~~~~esGGqG~~~~~~~~~~~L~D~~lGdSIA~NGvCLTV~e~~~~~f~vd~s~ET~~~t~L~ 80 (225)
T TIGR00187 1 MFTGIIQGTGKVKSIKEKRLFESGGQGISLTINLAQKILEDLHLGDSIAVNGVCLTVTEINKDHFSVDLSPETLKRTNLG 80 (225)
T ss_pred CCCEEECCCEEEEECCCCCCCCCCCCCEEECCCCCHHHHCCCCCCCEEEECCEEEEEEEECCCEEEEEECHHHHHHHHHH
T ss_conf 96302023023320013322012785047634872345402520454123674332221128868998325673354233
Q ss_pred HCCCC-CEEEEEHHH
Q ss_conf 24899-674697135
Q gi|254780347|r 176 MHKVG-DLINIEVDS 189 (204)
Q Consensus 176 ~~k~G-d~VNiE~D~ 189 (204)
T Consensus 81 ~~k~gr~~VNiErA~ 95 (225)
T TIGR00187 81 DLKVGRTKVNIERAL 95 (225)
T ss_pred HHHHCCCEECEEHHH
T ss_conf 355236720110674