Dear All
This paper reports the crystal structure of a protein, UVR8, involved in UV protection in Arabidopsis thaliana. Not only the beta-propellor fold is interesting, there is a quarternary switch from homodimer to monomer upon UV exposure. Also, the chemical groups that act as chromophores are two Trp residues.
http://links.ealert.nature.com/ctt?kn=124&ms=Mzg4ODc3MDUS1&r=MjA1NzU2OTA0MAS2&b=2&j=MTMxNjc5OTQ2S0&mt=1&rt=0
Sowdhamini
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