5f3k

From Proteopedia

(Difference between revisions)

Revision as of 02:36, 13 July 2016

X-Ray Crystallographic Structure of hTrap1 N-terminal Domain-apo

Structural highlights

5f3k is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	5f5r
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[TRAP1_HUMAN] Chaperone that expresses an ATPase activity. Involved in maintaining mitochondrial function and polarization, most likely through stabilization of mitochondrial complex I. Is a negative regulator of mitochondrial respiration able to modulate the balance between oxidative phosphorylation and aerobic glycolysis. The impact of TRAP1 on mitochondrial respiration is probably mediated by modulation of mitochondrial SRC and inhibition of SDHA.^[1] ^[2] ^[3]

Publication Abstract from PubMed

Heat-shock protein of 90 kDa (Hsp90) is an essential molecular chaperone that adopts different 3D structures associated with distinct nucleotide states: a wide-open, V-shaped dimer in the apo state and a twisted, N-terminally closed dimer with ATP. Although the N domain is known to mediate ATP binding, how Hsp90 senses the bound nucleotide and facilitates dimer closure remains unclear. Here we present atomic structures of human mitochondrial Hsp90N (TRAP1N) and a composite model of intact TRAP1 revealing a previously unobserved coiled-coil dimer conformation that may precede dimer closure and is conserved in intact TRAP1 in solution. Our structure suggests that TRAP1 normally exists in an autoinhibited state with the ATP lid bound to the nucleotide-binding pocket. ATP binding displaces the ATP lid that signals the cis-bound ATP status to the neighboring subunit in a highly cooperative manner compatible with the coiled-coil intermediate state. We propose that TRAP1 is a ligand-activated molecular chaperone, which couples ATP binding to dramatic changes in local structure required for protein folding.

Mitochondrial Hsp90 is a ligand-activated molecular chaperone coupling ATP binding to dimer closure through a coiled-coil intermediate.,Sung N, Lee J, Kim JH, Chang C, Joachimiak A, Lee S, Tsai FT Proc Natl Acad Sci U S A. 2016 Feb 29. pii: 201516167. PMID:26929380^[4]

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

References

↑ Zhang L, Karsten P, Hamm S, Pogson JH, Muller-Rischart AK, Exner N, Haass C, Whitworth AJ, Winklhofer KF, Schulz JB, Voigt A. TRAP1 rescues PINK1 loss-of-function phenotypes. Hum Mol Genet. 2013 Jul 15;22(14):2829-41. doi: 10.1093/hmg/ddt132. Epub 2013 Mar, 21. PMID:23525905 doi:http://dx.doi.org/10.1093/hmg/ddt132
↑ Yoshida S, Tsutsumi S, Muhlebach G, Sourbier C, Lee MJ, Lee S, Vartholomaiou E, Tatokoro M, Beebe K, Miyajima N, Mohney RP, Chen Y, Hasumi H, Xu W, Fukushima H, Nakamura K, Koga F, Kihara K, Trepel J, Picard D, Neckers L. Molecular chaperone TRAP1 regulates a metabolic switch between mitochondrial respiration and aerobic glycolysis. Proc Natl Acad Sci U S A. 2013 Apr 23;110(17):E1604-12. doi:, 10.1073/pnas.1220659110. Epub 2013 Apr 5. PMID:23564345 doi:http://dx.doi.org/10.1073/pnas.1220659110
↑ Sciacovelli M, Guzzo G, Morello V, Frezza C, Zheng L, Nannini N, Calabrese F, Laudiero G, Esposito F, Landriscina M, Defilippi P, Bernardi P, Rasola A. The mitochondrial chaperone TRAP1 promotes neoplastic growth by inhibiting succinate dehydrogenase. Cell Metab. 2013 Jun 4;17(6):988-99. doi: 10.1016/j.cmet.2013.04.019. PMID:23747254 doi:http://dx.doi.org/10.1016/j.cmet.2013.04.019
↑ Sung N, Lee J, Kim JH, Chang C, Joachimiak A, Lee S, Tsai FT. Mitochondrial Hsp90 is a ligand-activated molecular chaperone coupling ATP binding to dimer closure through a coiled-coil intermediate. Proc Natl Acad Sci U S A. 2016 Feb 29. pii: 201516167. PMID:26929380 doi:http://dx.doi.org/10.1073/pnas.1516167113

1 Structural highlights
2 Function
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/5f3k"

@@ Line 5: / Line 5: @@
 <table><tr><td colspan='2'>[[5f3k]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5F3K OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5F3K FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5f5r|5f5r]]</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=5f3k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5f3k OCA], [http://pdbe.org/5f3k PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5f3k RCSB], [http://www.ebi.ac.uk/pdbsum/5f3k 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=5f3k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5f3k OCA], [http://pdbe.org/5f3k PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5f3k RCSB], [http://www.ebi.ac.uk/pdbsum/5f3k PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5f3k ProSAT]</span></td></tr>
 </table>
 == Function ==

5f3k

From Proteopedia

Revision as of 02:36, 13 July 2016

X-Ray Crystallographic Structure of hTrap1 N-terminal Domain-apo

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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