2lwf: Difference between revisions
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2lwf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2lwf OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2lwf RCSB], [http://www.ebi.ac.uk/pdbsum/2lwf PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2lwf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2lwf OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2lwf RCSB], [http://www.ebi.ac.uk/pdbsum/2lwf PDBsum]</span></td></tr> | ||
</table> | </table> | ||
== Function == | |||
[[http://www.uniprot.org/uniprot/GRS16_ARATH GRS16_ARATH]] May only reduce GSH-thiol disulfides, but not protein disulfides (Potential). | |||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
Revision as of 11:51, 24 December 2014
Structure of N-terminal domain of a plant GrxStructure of N-terminal domain of a plant Grx
Structural highlights
Function[GRS16_ARATH] May only reduce GSH-thiol disulfides, but not protein disulfides (Potential). Publication Abstract from PubMedGlutaredoxins (Grxs) have been identified across taxa as important mediators in various physiological functions. A chloroplastic monothiol glutaredoxin, AtGRXS16 from Arabidopsis thaliana, comprises two distinct functional domains, an N-terminal domain (NTD) with GlyIleTyr-TyrIleGly (GIY-YIG) endonuclease motif and a C-terminal Grx module, to coordinate redox regulation and DNA cleavage in chloroplasts. Structural determination of AtGRXS16-NTD showed that it possesses a GIY-YIG endonuclease fold, but the critical residues for the nuclease activity are different from typical GIY-YIG endonucleases. AtGRXS16-NTD was able to cleave lambdaDNA and chloroplast genomic DNA, and the nuclease activity was significantly reduced in AtGRXS16. Functional analysis indicated that AtGRXS16-NTD could inhibit the ability of AtGRXS16 to suppress the sensitivity of yeast grx5 cells to oxidative stress; however, the C-terminal Grx domain itself and AtGRXS16 with a Cys123Ser mutation were active in these cells and able to functionally complement a Grx5 deficiency in yeast. Furthermore, the two functional domains were shown to be negatively regulated through the formation of an intramolecular disulfide bond. These findings unravel a manner of regulation for Grxs and provide insights into the mechanistic link between redox regulation and DNA metabolism in chloroplasts. Structural insights into the N-terminal GIY-YIG endonuclease activity of Arabidopsis glutaredoxin AtGRXS16 in chloroplasts.,Liu X, Liu S, Feng Y, Liu JZ, Chen Y, Pham K, Deng H, Hirschi KD, Wang X, Cheng N Proc Natl Acad Sci U S A. 2013 May 20. PMID:23690600[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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