1oc9

From Proteopedia

(Difference between revisions)

Revision as of 05:00, 10 September 2015

TRYPAREDOXIN II FROM C.FASCICULATA SOLVED BY MR

Structural highlights

1oc9 is a 2 chain structure with sequence from Crifa. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1fg4, 1i5g, 1o6j, 1o81, 1oc8
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

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

Tryparedoxin (TryX) is a member of the thioredoxin (TrX) fold family involved in the regulation of oxidative stress in parasitic trypanosomatids. Like TrX, TryX carries a characteristic Trp-Cys-Xaa-Xaa-Cys motif, which positions a redox-active disulfide underneath a tryptophan lid. We report the structure of a Crithidia fasciculata tryparedoxin isoform (CfTryX2) in two crystal forms and compare them with structures determined previously. Efforts to chemically generate crystals of reduced TryX1 were unsuccessful, and we carried out a novel experiment to break the redox-active disulfide, formed between Cys-40 and Cys-43, utilizing the intense x-radiation from a third generation synchrotron undulator beamline. A time course study of the S-S bond cleavage is reported with the structure of a TryX1 C43A mutant as the control. When freed from the constraints of a disulfide link to Cys-43, Cys-40 pivots to become slightly more solvent-accessible. In addition, we have determined the structure of Trypanosoma brucei TryX, which, influenced by the molecular packing in the crystal lattice, displays a significantly different orientation of the active site tryptophan lid. This structural change may be of functional significance when TryX interacts with tryparedoxin peroxidase, the final protein in the trypanothione-dependent peroxidase pathway. Comparisons with chloroplast TrX and its substrate fructose 1,6-bisphosphate phosphatase suggest that this movement may represent a general feature of redox regulation in the trypanothione and thioredoxin peroxidase pathways.

Tryparedoxins from Crithidia fasciculata and Trypanosoma brucei: photoreduction of the redox disulfide using synchrotron radiation and evidence for a conformational switch implicated in function.,Alphey MS, Gabrielsen M, Micossi E, Leonard GA, McSweeney SM, Ravelli RB, Tetaud E, Fairlamb AH, Bond CS, Hunter WN J Biol Chem. 2003 Jul 11;278(28):25919-25. Epub 2003 Apr 21. PMID:12707277^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Alphey MS, Gabrielsen M, Micossi E, Leonard GA, McSweeney SM, Ravelli RB, Tetaud E, Fairlamb AH, Bond CS, Hunter WN. Tryparedoxins from Crithidia fasciculata and Trypanosoma brucei: photoreduction of the redox disulfide using synchrotron radiation and evidence for a conformational switch implicated in function. J Biol Chem. 2003 Jul 11;278(28):25919-25. Epub 2003 Apr 21. PMID:12707277 doi:10.1074/jbc.M301526200

1 Structural highlights
2 Evolutionary Conservation
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1oc9"

@@ Line 2: / Line 2: @@
 <StructureSection load='1oc9' size='340' side='right' caption='[[1oc9]], [[Resolution|resolution]] 2.35&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1oc9]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Crithidia_fasciculata Crithidia fasciculata]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OC9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1OC9 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1oc9]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Crifa Crifa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OC9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1OC9 FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1fg4|1fg4]], [[1i5g|1i5g]], [[1o6j|1o6j]], [[1o81|1o81]], [[1oc8|1oc8]]</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=1oc9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1oc9 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1oc9 RCSB], [http://www.ebi.ac.uk/pdbsum/1oc9 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=1oc9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1oc9 OCA], [http://pdbe.org/1oc9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1oc9 RCSB], [http://www.ebi.ac.uk/pdbsum/1oc9 PDBsum]</span></td></tr>
 </table>
 == Evolutionary Conservation ==
@@ Line 24: / Line 24: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1oc9" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Crithidia fasciculata]]
+[[Category: Crifa]]
 [[Category: Hunter, W N]]
 [[Category: Leonard, G A]]

1oc9

From Proteopedia

Revision as of 05:00, 10 September 2015

TRYPAREDOXIN II FROM C.FASCICULATA SOLVED BY MR

Structural highlights

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox