6R9T

Cryo-EM structure of autoinhibited human talin-1


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Architecture of Talin1 Reveals an Autoinhibition Mechanism.

Dedden, D.Schumacher, S.Kelley, C.F.Zacharias, M.Biertumpfel, C.Fassler, R.Mizuno, N.

(2019) Cell 179: 120-131.e13

  • DOI: 10.1016/j.cell.2019.08.034
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Focal adhesions (FAs) are protein machineries essential for cell adhesion, migration, and differentiation. Talin is an integrin-activating and tension-sensing FA component directly connecting integrins in the plasma membrane with the actomyosin cytos ...

    Focal adhesions (FAs) are protein machineries essential for cell adhesion, migration, and differentiation. Talin is an integrin-activating and tension-sensing FA component directly connecting integrins in the plasma membrane with the actomyosin cytoskeleton. To understand how talin function is regulated, we determined a cryoelectron microscopy (cryo-EM) structure of full-length talin1 revealing a two-way mode of autoinhibition. The actin-binding rod domains fold into a 15-nm globular arrangement that is interlocked by the integrin-binding FERM head. In turn, the rod domains R9 and R12 shield access of the FERM domain to integrin and the phospholipid PIP 2 at the membrane. This mechanism likely ensures synchronous inhibition of integrin, membrane, and cytoskeleton binding. We also demonstrate that compacted talin1 reversibly unfolds to an ∼60-nm string-like conformation, revealing interaction sites for vinculin and actin. Our data explain how fast switching between active and inactive conformations of talin could regulate FA turnover, a process critical for cell adhesion and signaling.


    Organizational Affiliation

    Department of Structural Cell Biology, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany. Electronic address: mizuno@biochem.mpg.de.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Talin-1A2547Homo sapiensMutation(s): 0 
Gene Names: TLN1KIAA1027TLN
Find proteins for Q9Y490 (Homo sapiens)
Explore Q9Y490 
Go to UniProtKB:  Q9Y490
NIH Common Fund Data Resources
PHAROS  Q9Y490
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Research CouncilGermanyERC-CoG, 724209
Other privateGermanyBoehringer Ingelheim Stiftung Plus3

Revision History 

  • Version 1.0: 2019-10-16
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Other
  • Version 1.2: 2020-07-29
    Changes: Data collection