5CUF

X-ray crystal structure of SeMet human Sestrin2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Janus-faced Sestrin2 controls ROS and mTOR signalling through two separate functional domains.

Kim, H.An, S.Ro, S.H.Teixeira, F.Jin Park, G.Kim, C.Cho, C.S.Kim, J.S.Jakob, U.Hee Lee, J.Cho, U.S.

(2015) Nat Commun 6: 10025-10025

  • DOI: 10.1038/ncomms10025

  • PubMed Abstract: 
  • Sestrins are stress-inducible metabolic regulators with two seemingly unrelated but physiologically important functions: reduction of reactive oxygen species (ROS) and inhibition of the mechanistic target of rapamycin complex 1 (mTORC1). How Sestrins ...

    Sestrins are stress-inducible metabolic regulators with two seemingly unrelated but physiologically important functions: reduction of reactive oxygen species (ROS) and inhibition of the mechanistic target of rapamycin complex 1 (mTORC1). How Sestrins fulfil this dual role has remained elusive so far. Here we report the crystal structure of human Sestrin2 (hSesn2), and show that hSesn2 is twofold pseudo-symmetric with two globular subdomains, which are structurally similar but functionally distinct from each other. While the N-terminal domain (Sesn-A) reduces alkylhydroperoxide radicals through its helix-turn-helix oxidoreductase motif, the C-terminal domain (Sesn-C) modified this motif to accommodate physical interaction with GATOR2 and subsequent inhibition of mTORC1. These findings clarify the molecular mechanism of how Sestrins can attenuate degenerative processes such as aging and diabetes by acting as a simultaneous inhibitor of ROS accumulation and mTORC1 activation.


    Organizational Affiliation

    Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sestrin-2
A, B, C, D, E
483Homo sapiensMutation(s): 0 
Gene Names: SESN2 (Hi95, SEST2)
EC: 1.11.1.15
Find proteins for P58004 (Homo sapiens)
Go to Gene View: SESN2
Go to UniProtKB:  P58004
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.235 
  • Space Group: I 2 3
Unit Cell:
Length (Å)Angle (°)
a = 292.680α = 90.00
b = 292.680β = 90.00
c = 292.680γ = 90.00
Software Package:
Software NamePurpose
xia2data scaling
PHENIXphasing
REFMACrefinement
xia2data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney DiseaseUnited States2P30-DK020572
Ellison Medical FoundationUnited StatesAG-NS-0932-12

Revision History 

  • Version 1.0: 2016-01-13
    Type: Initial release
  • Version 1.1: 2017-09-20
    Type: Author supporting evidence, Derived calculations