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Title: Structure of the Get3 targeting factor in complex with its membrane protein cargo

Journal Article · · Science
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  1. Department of Biochemistry and Molecular Biology, The University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA.
  2. MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK.

How to GET to the right membrane Membrane proteins with a hydrophobic transmembrane domain (TMD) play critical roles in virtually all aspects of cell physiology. After it has been synthesized in the cytosol, this TMD must be targeted to and inserted into the correct membrane. The GET pathway is one of two targeting pathways to the endoplasmic reticulum conserved across all eukaryotes. It is not clear how the central targeting factor, Get3, recognizes a TMD to shield it from aggregation until it is successfully inserted into the membrane. Now, Mateja et al. show that the functional targeting complex comprises a Get3 dimer bound to a single TMD. The helical hydrophobic TMD binds deep within a large hydrophobic groove in the Get3 dimer. This groove closes slightly upon TMD binding, forming a dynamic “lid” over the mouth of the groove. Science , this issue p. 1152

Research Organization:
Univ. of Chicago, IL (United States); MRC Lab. of Molecular Biology, Cambridge (United Kingdom)
Sponsoring Organization:
USDOE; National Inst. of Health (NIH) (United States); Medical Research Council (MRC) (United Kingdom)
Grant/Contract Number:
AC02-06CH11357; P41 GM103403; MC_UP_A022_1007; U01 GM094588; U54 GM087519; R01 GM086487
OSTI ID:
1353292
Alternate ID(s):
OSTI ID: 1172425
Journal Information:
Science, Journal Name: Science Vol. 347 Journal Issue: 6226; ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 83 works
Citation information provided by
Web of Science

References (35)

The structural basis of tail-anchored membrane protein recognition by Get3 journal August 2009
Model for eukaryotic tail-anchored protein binding based on the structure of Get3 journal August 2009
Precise timing of ATPase activation drives targeting of tail-anchored proteins journal April 2013
Endoplasmic Reticulum Targeting and Insertion of Tail-Anchored Membrane Proteins by the GET Pathway journal August 2013
Tail-anchor targeting by a Get3 tetramer: the structure of an archaeal homologue: A tetrameric model for Get3 tail-anchor targeting journal November 2011
A Chaperone Cascade Sorts Proteins for Posttranslational Membrane Insertion into the Endoplasmic Reticulum journal October 2010
The Protein Targeting Factor Get3 Functions as ATP-Independent Chaperone under Oxidative Stress Conditions journal October 2014
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Generating conformation-specific synthetic antibodies to trap proteins in selected functional states journal March 2013
The GET Complex Mediates Insertion of Tail-Anchored Proteins into the ER Membrane journal August 2008
Structural basis of signal-sequence recognition by the signal recognition particle journal February 2011
Allosteric control of ligand-binding affinity using engineered conformation-specific effector proteins journal March 2011
Structural Basis for Tail-Anchored Membrane Protein Biogenesis by the Get3-Receptor Complex journal June 2011
Differential gradients of interaction affinities drive efficient targeting and recycling in the GET pathway journal November 2014
The Get1/2 transmembrane complex is an endoplasmic-reticulum membrane protein insertase journal July 2014
Mechanism of Residence of Cytochrome B(5), a Tail-Anchored Protein, in the Endoplasmic Reticulum journal March 2000
The complex process of GETting tail-anchored membrane proteins to the ER journal April 2012
A ribosome-associating factor chaperones tail-anchored membrane proteins journal August 2010
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The Crystal Structures of Yeast Get3 Suggest a Mechanism for Tail-Anchored Protein Membrane Insertion journal November 2009
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Structural insights into tail-anchored protein binding and membrane insertion by Get3 journal November 2009
The mechanism of membrane-associated steps in tail-anchored protein insertion journal August 2011
Crystal Structure of the Signal Sequence Binding Subunit of the Signal Recognition Particle journal July 1998
Addition of a photocrosslinking amino acid to the genetic code of Escherichia coli journal August 2002
Structural characterization of the Get4/Get5 complex and its interaction with Get3 journal June 2010
Crystal structure of ATP-bound Get3–Get4–Get5 complex reveals regulation of Get3 by Get4 journal April 2014
Identification of a Targeting Factor for Posttranslational Membrane Protein Insertion into the ER journal March 2007
Recognition of a signal peptide by the signal recognition particle journal April 2010
Phaser crystallographic software journal July 2007
Signal Recognition Particle: An Essential Protein-Targeting Machine journal June 2013
Structures of the Sgt2/SGTA Dimerization Domain with the Get5/UBL4A UBL Domain Reveal an Interaction that Forms a Conserved Dynamic Interface journal December 2012

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