Crystal structure of the protein At3g01520, a eukaryotic universal stress protein-like protein from arabidopsis thaliana in complex with AMP

Abstract

Members of the universal stress protein (USP) family are conserved in a phylogenetically diverse range of prokaryotes, fungi, protists, and plants and confer abilities to respond to a wide range of environmental stresses. Arabidopsis thaliana contains 44 USP domain-containing proteins, and USP domain is found either in a small protein with unknown physiological function or in an N-terminal portion of a multi-domain protein, usually a protein kinase. Here, we report the first crystal structure of a eukaryotic USP-like protein encoded from the gene At3g01520. The crystal structure of the protein At3g01520 was determined by the single-wavelength anomalous dispersion method and refined to an R factor of 21.8% (Rfree =  26.1%) at 2.5 Å resolution. The crystal structure includes three At3g01520 protein dimers with one AMP molecule bound to each protomer, comprising a Rossmann-like α/β overall fold. The bound AMP and conservation of residues in the ATP-binding loop suggest that the protein At3g01520 also belongs to the ATP-binding USP subfamily members.

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Kim, Do Jin, Bitto, Eduard, Bingman, Craig A., et al.. "Crystal structure of the protein At3g01520, a eukaryotic universal stress protein-like protein from arabidopsis thaliana in complex with AMP." Proteins: Structure, Function, and Bioinformatics, 83, no. 7 (2015) Wiley: 1368-1373. http://dx.doi.org/10.1002/prot.24821.

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