5OLM

TRIM21


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Intracellular antibody signalling is regulated by phosphorylation of the Fc receptor TRIM21.

Dickson, C.Fletcher, A.Vaysburd, M.Yang, J.C.Mallery, D.L.Zeng, J.Johnson, C.M.McLaughlin, S.H.Skehel, M.Maslen, S.Cruickshank, J.Huguenin-Dezot, N.Chin, J.W.Neuhaus, D.James, L.C.

(2018) Elife 7: --

  • DOI: 10.7554/eLife.32660

  • PubMed Abstract: 
  • Cell surface Fc receptors activate inflammation and are tightly controlled to prevent autoimmunity. Antibodies also simulate potent immune signalling from inside the cell via the cytosolic antibody receptor TRIM21, but how this is regulated is unknow ...

    Cell surface Fc receptors activate inflammation and are tightly controlled to prevent autoimmunity. Antibodies also simulate potent immune signalling from inside the cell via the cytosolic antibody receptor TRIM21, but how this is regulated is unknown. Here we show that TRIM21 signalling is constitutively repressed by its B-Box domain and activated by phosphorylation. The B-Box occupies an E2 binding site on the catalytic RING domain by mimicking E2-E3 interactions, inhibiting TRIM21 ubiquitination and preventing immune activation. TRIM21 is derepressed by IKKβ and TBK1 phosphorylation of an LxxIS motif in the RING domain, at the interface with the B-Box. Incorporation of phosphoserine or a phosphomimetic within this motif relieves B-Box inhibition, promoting E2 binding, RING catalysis, NF-κB activation and cytokine transcription upon infection with DNA or RNA viruses. These data explain how intracellular antibody signalling is regulated and reveal that the B-Box is a critical regulator of RING E3 ligase activity.


    Organizational Affiliation

    Medical Research Council Laboratory of Molecular Biology, Cambridge, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
E3 ubiquitin-protein ligase TRIM21
A, B
132Homo sapiensMutation(s): 0 
Gene Names: TRIM21 (RNF81, RO52, SSA1)
EC: 2.3.2.27
Find proteins for P19474 (Homo sapiens)
Go to Gene View: TRIM21
Go to UniProtKB:  P19474
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.208 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 28.400α = 90.00
b = 83.260β = 90.00
c = 117.588γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
REFMACrefinement
Aimlessdata scaling
iMOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2017-07-28 
  • Released Date: 2018-04-25 
  • Deposition Author(s): James, L.C.

Revision History 

  • Version 1.0: 2018-04-25
    Type: Initial release