This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

5bwk

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 09:48, 22 November 2017

6.0 A Crystal structure of a Get3-Get4-Get5 intermediate complex from S.cerevisiae

Structural highlights

5bwk is a 24 chain structure with sequence from Baker's yeast. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	5bw8
Gene:	GET3, SCRG_00595 (Baker's yeast), GET4, YOR164C, O3580 (Baker's yeast), MDY2, GET5, TMA24, YOL111C (Baker's yeast)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[GET3_YEAS1] ATPase required for the post-translational delivery of tail-anchored (TA) proteins to the endoplasmic reticulum. Recognizes and selectively binds the transmembrane domain of TA proteins in the cytosol. This complex then targets to the endoplasmic reticulum by membrane-bound receptors GET1 and GET2, where the tail-anchored protein is released for insertion. This process is regulated by ATP binding and hydrolysis. ATP binding drives the homodimer towards the closed dimer state, facilitating recognition of newly synthesized TA membrane proteins. ATP hydrolysis is required for insertion. Subsequently, the homodimer reverts towards the open dimer state, lowering its affinity for the GET1-GET2 receptor, and returning it to the cytosol to initiate a new round of targeting. Cooperates with the HDEL receptor ERD2 to mediate the ATP-dependent retrieval of resident ER proteins that contain a C-terminal H-D-E-L retention signal from the Golgi to the ER. Involved in low-level resistance to the oxyanions arsenite and arsenate, and in heat tolerance. [MDY2_YEAST] Required for efficient mating. Involved in the production of alpha-factor, the KAR9 and TUB1 location to the shmoo tip and nuclear migration into pheromone-induced shmoos.^[1] ^[2] [GET4_YEAST] May play a role in insertion of tail-anchored proteins into the endoplasmic reticulum membrane.^[3]

Publication Abstract from PubMed

Tail-anchored (TA) proteins, defined as having a single transmembrane helix at their C-terminus, are post-translationally targeted to the endoplasmic reticulum (ER) membrane by the GET (Guided Entry of TA proteins) pathway. In yeast, the handover of TA substrates is mediated by the heterotetrameric Get4/Get5 (Get4/5) complex, which tethers the co-chaperone Sgt2 to the targeting factor, the Get3 ATPase. Binding of Get4/5 to Get3 is critical for efficient TA targeting; however, questions remain about the formation of the Get3-Get4/5 complex. Here we report crystal structures of a Get3-Get4/5 complex from Saccharomyces cerevisiae (Sc) at 2.8 A and 6.0 A, which reveal a novel interface between Get3 and Get4 dominated by electrostatic interactions. Kinetic and mutational analyses strongly suggest that these structures represent an on-pathway intermediate that rapidly assembles and then rearranges to the final Get3-Get4/5 complex. Furthermore, we provide evidence that the Get3-Get4/5 complex is dominated by a single Get4/5 heterotetramer bound to one monomer of a Get3 dimer, uncovering an intriguing asymmetry in the Get4/5 heterotetramer upon Get3 binding. Ultrafast diffusion-limitd electrostatically driven Get3-Get4/5 association enables Get4/5 to rapidly sample and capture Get3 at different stages of the GET pathway.

Mechanism of assembly of a substrate-transfer complex during tail-anchored protein targeting.,Gristick HB, Rome ME, Chartron JW, Rao M, Hess S, Shan SO, Clemons WM Jr J Biol Chem. 2015 Oct 7. pii: jbc.M115.677328. PMID:26451041^[4]

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

References

↑ Iwanejko L, Smith KN, Loeillet S, Nicolas A, Fabre F. Disruption and functional analysis of six ORFs on chromosome XV: YOL117w, YOL115w ( TRF4), YOL114c, YOL112w ( MSB4), YOL111c and YOL072w. Yeast. 1999 Oct;15(14):1529-39. PMID:10514570 doi:<1529::AID-YEA457>3.0.CO;2-Y 10.1002/(SICI)1097-0061(199910)15:14<1529::AID-YEA457>3.0.CO;2-Y
↑ Hu Z, Potthoff B, Hollenberg CP, Ramezani-Rad M. Mdy2, a ubiquitin-like (UBL)-domain protein, is required for efficient mating in Saccharomyces cerevisiae. J Cell Sci. 2006 Jan 15;119(Pt 2):326-38. Epub 2006 Jan 3. PMID:16390866 doi:jcs.02754
↑ Jonikas MC, Collins SR, Denic V, Oh E, Quan EM, Schmid V, Weibezahn J, Schwappach B, Walter P, Weissman JS, Schuldiner M. Comprehensive characterization of genes required for protein folding in the endoplasmic reticulum. Science. 2009 Mar 27;323(5922):1693-7. doi: 10.1126/science.1167983. PMID:19325107 doi:http://dx.doi.org/10.1126/science.1167983
↑ Gristick HB, Rome ME, Chartron JW, Rao M, Hess S, Shan SO, Clemons WM Jr. Mechanism of assembly of a substrate-transfer complex during tail-anchored protein targeting. J Biol Chem. 2015 Oct 7. pii: jbc.M115.677328. PMID:26451041 doi:http://dx.doi.org/10.1074/jbc.M115.677328

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/5bwk"

@@ Line 1: / Line 1: @@
 ==6.0 A Crystal structure of a Get3-Get4-Get5 intermediate complex from S.cerevisiae==
 <StructureSection load='5bwk' size='340' side='right' caption='[[5bwk]], [[Resolution|resolution]] 6.00&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5bwk]] is a 24 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5BWK OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5BWK FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5bwk]] is a 24 chain structure with sequence from [http://en.wikipedia.org/wiki/Baker's_yeast Baker's yeast]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5BWK OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5BWK FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5bw8|5bw8]]</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=5bwk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5bwk OCA], [http://pdbe.org/5bwk PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5bwk RCSB], [http://www.ebi.ac.uk/pdbsum/5bwk PDBsum]</span></td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GET3, SCRG_00595 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=285006 Baker's yeast]), GET4, YOR164C, O3580 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast]), MDY2, GET5, TMA24, YOL111C ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast])</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=5bwk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5bwk OCA], [http://pdbe.org/5bwk PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5bwk RCSB], [http://www.ebi.ac.uk/pdbsum/5bwk PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5bwk ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 22: / Line 24: @@
 __TOC__
 </StructureSection>
+[[Category: Baker's yeast]]
 [[Category: Chartron, J W]]
 [[Category: Clemons, W M]]

5bwk

From Proteopedia

Revision as of 09:48, 22 November 2017

6.0 A Crystal structure of a Get3-Get4-Get5 intermediate complex from S.cerevisiae

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox