6BNT

Crystal structure of AP2 mu1 adaptin C-terminal domain with IRS-1 peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mitotic regulators and the SHP2-MAPK pathway promote IR endocytosis and feedback regulation of insulin signaling.

Choi, E.Kikuchi, S.Gao, H.Brodzik, K.Nassour, I.Yopp, A.Singal, A.G.Zhu, H.Yu, H.

(2019) Nat Commun 10: 1473-1473

  • DOI: 10.1038/s41467-019-09318-3

  • PubMed Abstract: 
  • Insulin controls glucose homeostasis and cell growth through bifurcated signaling pathways. Dysregulation of insulin signaling is linked to diabetes and cancer. The spindle checkpoint controls the fidelity of chromosome segregation during mitosis. He ...

    Insulin controls glucose homeostasis and cell growth through bifurcated signaling pathways. Dysregulation of insulin signaling is linked to diabetes and cancer. The spindle checkpoint controls the fidelity of chromosome segregation during mitosis. Here, we show that insulin receptor substrate 1 and 2 (IRS1/2) cooperate with spindle checkpoint proteins to promote insulin receptor (IR) endocytosis through recruiting the clathrin adaptor complex AP2 to IR. A phosphorylation switch of IRS1/2 orchestrated by extracellular signal-regulated kinase 1 and 2 (ERK1/2) and Src homology phosphatase 2 (SHP2) ensures selective internalization of activated IR. SHP2 inhibition blocks this feedback regulation and growth-promoting IR signaling, prolongs insulin action on metabolism, and improves insulin sensitivity in mice. We propose that mitotic regulators and SHP2 promote feedback inhibition of IR, thereby limiting the duration of insulin signaling. Targeting this feedback inhibition can improve insulin sensitivity.


    Organizational Affiliation

    Children's Research Institute, Departments of Pediatrics and Internal Medicine, Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 6000 Harry Hines Boulevard, Dallas, TX, 75390, USA.,Howard Hughes Medical Institute, Department of Pharmacology, University of Texas Southwestern Medical Center, 6001 Forest Park Road, Dallas, TX, 75390, USA. hongtao.yu@utsouthwestern.edu.,Howard Hughes Medical Institute, Department of Pharmacology, University of Texas Southwestern Medical Center, 6001 Forest Park Road, Dallas, TX, 75390, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AP-2 complex subunit mu
A
315Homo sapiensMutation(s): 0 
Gene Names: AP2M1 (CLAPM1, KIAA0109)
Find proteins for Q96CW1 (Homo sapiens)
Go to Gene View: AP2M1
Go to UniProtKB:  Q96CW1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Insulin receptor substrate 1
B
15Homo sapiensMutation(s): 0 
Gene Names: IRS1
Find proteins for P35568 (Homo sapiens)
Go to Gene View: IRS1
Go to UniProtKB:  P35568
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
B
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.206 
  • Space Group: P 64
Unit Cell:
Length (Å)Angle (°)
a = 125.334α = 90.00
b = 125.334β = 90.00
c = 74.818γ = 120.00
Software Package:
Software NamePurpose
HKL-3000data scaling
PHENIXrefinement
HKL-3000data reduction
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Clayton FoundationUnited States--

Revision History 

  • Version 1.0: 2018-11-21
    Type: Initial release
  • Version 1.1: 2019-06-05
    Type: Data collection, Database references