Structural highlights
Function
[SOT12_ARATH] Sulfotransferase that utilizes 3'-phospho-5'-adenylyl sulfate (PAPS) as sulfonate donor to catalyze the stereospecific sulfate conjugation of 24-epibrassinosteroids. Preferred substrates are 24-epicathasterone and 6-deoxo-24-epicathasterone. Low activity with 22-deoxy-24-epiteasterone. No activity with 24-epimers catasterone and brassinolide. Sulfonates salicylic acid. May be involved in detoxification. Enhances plant response to pathogen infection and contributes to long distance signaling in systemic acquired resistance (SAR).[1] [2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
X-ray crystallography typically uses a single set of coordinates and B factors to describe macromolecular conformations. Refinement of multiple copies of the entire structure has been previously used in specific cases as an alternative means of representing structural flexibility. Here, we systematically validate this method by using simulated diffraction data, and we find that ensemble refinement produces better representations of the distributions of atomic positions in the simulated structures than single-conformer refinements. Comparison of principal components calculated from the refined ensembles and simulations shows that concerted motions are captured locally, but that correlations dissipate over long distances. Ensemble refinement is also used on 50 experimental structures of varying resolution and leads to decreases in R(free) values, implying that improvements in the representation of flexibility observed for the simulated structures may apply to real structures. These gains are essentially independent of resolution or data-to-parameter ratio, suggesting that even structures at moderate resolution can benefit from ensemble refinement.
Ensemble refinement of protein crystal structures: validation and application.,Levin EJ, Kondrashov DA, Wesenberg GE, Phillips GN Jr Structure. 2007 Sep;15(9):1040-52. PMID:17850744[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Marsolais F, Boyd J, Paredes Y, Schinas AM, Garcia M, Elzein S, Varin L. Molecular and biochemical characterization of two brassinosteroid sulfotransferases from Arabidopsis, AtST4a (At2g14920) and AtST1 (At2g03760). Planta. 2007 Apr;225(5):1233-44. Epub 2006 Oct 13. PMID:17039368 doi:http://dx.doi.org/10.1007/s00425-006-0413-y
- ↑ Baek D, Pathange P, Chung JS, Jiang J, Gao L, Oikawa A, Hirai MY, Saito K, Pare PW, Shi H. A stress-inducible sulphotransferase sulphonates salicylic acid and confers pathogen resistance in Arabidopsis. Plant Cell Environ. 2010 Aug 1;33(8):1383-92. doi:, 10.1111/j.1365-3040.2010.02156.x. Epub 2010 Apr 1. PMID:20374532 doi:http://dx.doi.org/10.1111/j.1365-3040.2010.02156.x
- ↑ Levin EJ, Kondrashov DA, Wesenberg GE, Phillips GN Jr. Ensemble refinement of protein crystal structures: validation and application. Structure. 2007 Sep;15(9):1040-52. PMID:17850744 doi:http://dx.doi.org/10.1016/j.str.2007.06.019
