6ENS

Structure of mouse wild-type RKIP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.125 
  • R-Value Observed: 0.127 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Conserved salt-bridge competition triggered by phosphorylation regulates the protein interactome.

Skinner, J.J.Wang, S.Lee, J.Ong, C.Sommese, R.Sivaramakrishnan, S.Koelmel, W.Hirschbeck, M.Schindelin, H.Kisker, C.Lorenz, K.Sosnick, T.R.Rosner, M.R.

(2017) Proc Natl Acad Sci U S A 114: 13453-13458

  • DOI: https://doi.org/10.1073/pnas.1711543114
  • Primary Citation of Related Structures:  
    6ENS, 6ENT

  • PubMed Abstract: 

    Phosphorylation is a major regulator of protein interactions; however, the mechanisms by which regulation occurs are not well understood. Here we identify a salt-bridge competition or "theft" mechanism that enables a phospho-triggered swap of protein partners by Raf Kinase Inhibitory Protein (RKIP). RKIP transitions from inhibiting Raf-1 to inhibiting G-protein-coupled receptor kinase 2 upon phosphorylation, thereby bridging MAP kinase and G-Protein-Coupled Receptor signaling. NMR and crystallography indicate that a phosphoserine, but not a phosphomimetic, competes for a lysine from a preexisting salt bridge, initiating a partial unfolding event and promoting new protein interactions. Structural elements underlying the theft occurred early in evolution and are found in 10% of homo-oligomers and 30% of hetero-oligomers including Bax, Troponin C, and Early Endosome Antigen 1. In contrast to a direct recognition of phosphorylated residues by binding partners, the salt-bridge theft mechanism represents a facile strategy for promoting or disrupting protein interactions using solvent-accessible residues, and it can provide additional specificity at protein interfaces through local unfolding or conformational change.


  • Organizational Affiliation

    Ben May Department for Cancer Research, University of Chicago, Chicago, IL 60637.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phosphatidylethanolamine-binding protein 1193Mus musculusMutation(s): 0 
Gene Names: Pebp1PbpPebp
UniProt & NIH Common Fund Data Resources
Find proteins for P70296 (Mus musculus)
Explore P70296 
Go to UniProtKB:  P70296
IMPC:  MGI:1344408
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP70296
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.168 
  • R-Value Work: 0.125 
  • R-Value Observed: 0.127 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.58α = 90
b = 54.09β = 90
c = 97.95γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of HealthUnited StatesGM087630
National Institutes of HealthUnited StatesGM55694
German Research FoundationGermanyFZ82

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-13
    Type: Initial release
  • Version 1.1: 2017-12-20
    Changes: Database references
  • Version 1.2: 2017-12-27
    Changes: Database references
  • Version 1.3: 2024-01-17
    Changes: Data collection, Database references, Refinement description