5WRM

Mu2 subunit of the clathrin adaptor complex AP2 in complex with IRS-1 Y658 peptide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

IRS-1 acts as an endocytic regulator of IGF-I receptor to facilitate sustained IGF signaling

Yoneyama, Y., Lanzerstorfer, P., Niwa, H., Umehara, T., Shibano, T., Yokoyama, S., Chida, K., Weghuber, J., Hakuno, F., Takahashi, S.I.

(2018) Elife 7

  • DOI: 10.7554/eLife.32893
  • Primary Citation of Related Structures:  
    5WRK, 5WRM, 5WRL

  • PubMed Abstract: 

    • Insulin-like growth factor-I receptor (IGF-IR) preferentially regulates the long-term IGF activities including growth and metabolism. Kinetics of ligand-dependent IGF-IR endocytosis determines how IGF induces such downstream signaling outputs. Here, we f ...

    Insulin-like growth factor-I receptor (IGF-IR) preferentially regulates the long-term IGF activities including growth and metabolism. Kinetics of ligand-dependent IGF-IR endocytosis determines how IGF induces such downstream signaling outputs. Here, we find that the insulin receptor substrate (IRS)-1 modulates how long ligand-activated IGF-IR remains at the cell surface before undergoing endocytosis in mammalian cells. IRS-1 interacts with the clathrin adaptor complex AP2. IRS-1, but not an AP2-binding-deficient mutant, delays AP2-mediated IGF-IR endocytosis after the ligand stimulation. Mechanistically, IRS-1 inhibits the recruitment of IGF-IR into clathrin-coated structures; for this reason, IGF-IR avoids rapid endocytosis and prolongs its activity on the cell surface. Accelerating IGF-IR endocytosis via IRS-1 depletion induces the shift from sustained to transient Akt activation and augments FoxO-mediated transcription. Our study establishes a new role for IRS-1 as an endocytic regulator of IGF-IR that ensures sustained IGF bioactivity, independent of its classic role as an adaptor in IGF-IR signaling.

    Organizational Affiliation: 

    Department of Animal Resource Sciences, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AP-2 complex subunit mu A278Rattus norvegicusMutation(s): 0 
Gene Names: Ap2m1
Find proteins for P84092 (Rattus norvegicus)
Explore P84092 
Go to UniProtKB:  P84092
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Insulin receptor substrate 1 P8Rattus norvegicusMutation(s): 0 
Gene Names: Irs1, Irs-1
Find proteins for P35570 (Rattus norvegicus)
Explore P35570 
Go to UniProtKB:  P35570
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 
  • Space Group: P 64
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 125.478α = 90
b = 125.478β = 90
c = 74.138γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data processing
PHASERphasing
HKL-2000data reduction

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-12-06
    Type: Initial release
  • Version 1.1: 2018-12-19
    Changes: Data collection, Database references