Crystal Structure of the blue-light absorbing form of the Thermosynechococcus elongatus PixJ GAF-domain

Phycoviolobilin, blue light-absorbing form
3-[5-[(3-ethyl-4-methyl-5-oxidanylidene-1,2-dihydropyrrol-2-yl)methyl]-2-[[5-[(Z)-(4-ethyl-3-methyl-5-oxidanylidene-pyr rol-2-ylidene)methyl]-3-(3-hydroxy-3-oxopropyl)-4-methyl-1H-pyrrol-2-yl]methyl]-4-methyl-1H-pyrrol-3-yl]propanoic acid

A Photo-Labile Thioether Linkage to Phycoviolobilin Provides the Foundation for the Blue/Green Photocycles in DXCF-Cyanobacteriochromes.

MAAVQLSELRDRQAIFETLVAKGRELLACDRVIVYAFDDNYVGTVVAESVAEGWPQARDQVIEDPCFREHWVEAYRQGRI
QATTDIFKAGLTECHLNQLRPLKVRANLVVPMVIDDQLFGLLIAHQASEPRQWQEIEIDQFSELASTGSLVLERLHFLEQ
TIASLHHHHHH

50 mM NaCl, 0.3 mM tris(2-carboxyethyl)phosphine, 10 mM HEPES-NaOH (pH 7.8), 25% polyethylene glycol 3350, 200 mM sodium chloride, 40 mM glycine, 100 mM BIS-TRIS-HCl, (pH 5.5), vapor diffusion, sitting drop, temperature 293K

( CHAIN A AND ( RESID 563:584 OR RESID 1000:1000 ) )

chromophore, phytochrome, cyanobacteriochrome, phycoviolobilin, bilin, bili-protein, cation-pi interaction, signaling protein, GAF domain, photoreceptor, phycoviolobilin adduct

AAVQLSELRDRQAIFETLVAKGRELLACDRVIVYAFDDNYVGTVVAESVAEGWPQARDQVIEDPCFREHWVEAYRQGRIQ
ATTDIFKAGLTECHLNQLRPLKVRANLVVPMVIDDQLFGLLIAHQCSEPRQWQEIEIDQFSELASTGSLVLERLHFLEQT
IA