4J81

Crystal structure of beta'-COP/Insig-1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.160 

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This is version 1.1 of the entry. See complete history


Literature

Rules for the recognition of dilysine retrieval motifs by coatomer.

Ma, W.Goldberg, J.

(2013) EMBO J 32: 926-937

  • DOI: 10.1038/emboj.2013.41
  • Primary Citation of Related Structures:  
    4J73, 4J77, 4J78, 4J79, 4J81, 4J82, 4J84, 4J86, 4J87, 4J8B, 4J8G

  • PubMed Abstract: 
  • Cytoplasmic dilysine motifs on transmembrane proteins are captured by coatomer α-COP and β'-COP subunits and packaged into COPI-coated vesicles for Golgi-to-ER retrieval. Numerous ER/Golgi proteins contain K(x)Kxx motifs, but the rules for their recognition are unclear ...

    Cytoplasmic dilysine motifs on transmembrane proteins are captured by coatomer α-COP and β'-COP subunits and packaged into COPI-coated vesicles for Golgi-to-ER retrieval. Numerous ER/Golgi proteins contain K(x)Kxx motifs, but the rules for their recognition are unclear. We present crystal structures of α-COP and β'-COP bound to a series of naturally occurring retrieval motifs-encompassing KKxx, KxKxx and non-canonical RKxx and viral KxHxx sequences. Binding experiments show that α-COP and β'-COP have generally the same specificity for KKxx and KxKxx, but only β'-COP recognizes the RKxx signal. Dilysine motif recognition involves lysine side-chain interactions with two acidic patches. Surprisingly, however, KKxx and KxKxx motifs bind differently, with their lysine residues transposed at the binding patches. We derive rules for retrieval motif recognition from key structural features: the reversed binding modes, the recognition of the C-terminal carboxylate group which enforces lysine positional context, and the tolerance of the acidic patches for non-lysine residues.


    Organizational Affiliation

    Memorial Sloan-Kettering Cancer Center, Howard Hughes Medical Institute and the Structural Biology Program, New York, NY, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Coatomer subunit beta'A, B301Saccharomyces cerevisiaeMutation(s): 0 
UniProt
Find proteins for P41811 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P41811 
Go to UniProtKB:  P41811
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Insulin-induced gene 1 proteinC, D5Homo sapiensMutation(s): 0 
Gene Names: INSIG1
UniProt & NIH Common Fund Data Resources
Find proteins for O15503 (Homo sapiens)
Explore O15503 
Go to UniProtKB:  O15503
PHAROS:  O15503
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.160 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.661α = 89.75
b = 48.758β = 89.63
c = 75.208γ = 63.95
Software Package:
Software NamePurpose
ADSCdata collection
PHENIXrefinement

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2013-02-14 
  • Released Date: 2013-03-27 
  • Deposition Author(s): Ma, W., Goldberg, J.

Revision History  (Full details and data files)

  • Version 1.0: 2013-03-27
    Type: Initial release
  • Version 1.1: 2013-04-17
    Changes: Database references