7LT8

Crystal structure of Ras suppressor-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.76 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.176 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular basis for Ras suppressor-1 binding to PINCH-1 in focal adhesion assembly.

Fukuda, K.Lu, F.Qin, J.

(2021) J Biol Chem 296: 100685-100685

  • DOI: 10.1016/j.jbc.2021.100685
  • Primary Citation of Related Structures:  
    7LT8, 7LT9

  • PubMed Abstract: 
  • Ras suppressor-1 (Rsu-1) is a leucine-rich repeat (LRR)-containing protein that is crucial for regulating cell adhesion, and is involved in such physiological and pathological processes as focal adhesion assembly and tumor metastasis. Rsu-1 interacts with zinc-finger type multi-LIM domain-containing adaptor protein PINCH-1, known to be involved in the integrin-mediated consensus adhesome, but not with its highly homologous family member PINCH-2 ...

    Ras suppressor-1 (Rsu-1) is a leucine-rich repeat (LRR)-containing protein that is crucial for regulating cell adhesion, and is involved in such physiological and pathological processes as focal adhesion assembly and tumor metastasis. Rsu-1 interacts with zinc-finger type multi-LIM domain-containing adaptor protein PINCH-1, known to be involved in the integrin-mediated consensus adhesome, but not with its highly homologous family member PINCH-2. However, the structural basis for and regulatory mechanisms of this specific interaction remain unclear. Here, we determined the crystal structures of Rsu-1 and its complex with the PINCH-1 LIM4-5 domains. Rsu-1 displays an arc-shaped solenoid architecture, with eight LRRs shielded by N- and C-terminal capping modules. We showed that the conserved concave surface of the Rsu-1 LRR domain binds and stabilizes the PINCH-1 LIM5 domain via salt bridge and hydrophobic interactions, while the C-terminal non-LIM region of PINCH-2 sterically disfavors Rsu-1 binding. We also showed that Rsu-1 can be assembled, via PINCH-1-binding, into a hetero-pentamer complex comprising Rsu-1, PINCH-1, ILK, Parvin, and Kindlin-2, which constitute a major consensus integrin adhesome crucial for focal adhesion assembly. Our mutagenesis and cell biological data emphasize the significance of the Rsu-1/PINCH-1 interaction in focal adhesion assembly and cell spreading, providing crucial molecular insights into Rsu-1-mediated cell adhesion with implications for disease development.


    Organizational Affiliation

    Department of Cardiovascular & Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, OH 44195; Department of Biochemistry, School of Medicine, Case Western Reserve University, Cleveland, OH 44106. Electronic address: qinj@ccf.org.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ras suppressor protein 1A280Homo sapiensMutation(s): 0 
Gene Names: RSU1RSP1
UniProt & NIH Common Fund Data Resources
Find proteins for Q15404 (Homo sapiens)
Explore Q15404 
Go to UniProtKB:  Q15404
PHAROS:  Q15404
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.76 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.176 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 31.851α = 90
b = 45.328β = 99.024
c = 83.052γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling
SHELXphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data

  • Deposited Date: 2021-02-19 
  • Released Date: 2021-04-28 
  • Deposition Author(s): Fukuda, K., Qin, J.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2021-04-28
    Type: Initial release
  • Version 1.1: 2021-05-05
    Changes: Database references
  • Version 1.2: 2021-07-21
    Changes: Database references