5V4B image
Entry Detail
PDB ID:
5V4B
Keywords:
Title:
Crystal structure of the Skp1-FBXW7-DISC1 complex
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2017-03-08
Release Date:
2017-09-20
Method Details:
Experimental Method:
Resolution:
2.60 Å
R-Value Free:
0.21
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
I 41 2 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:S-phase kinase-associated protein 1,S-phase kinase-associated protein 1
Chain IDs:A
Chain Length:149
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:F-box/WD repeat-containing protein 7
Chain IDs:B
Chain Length:444
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:DISC1 peptide
Chain IDs:C
Chain Length:15
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
FBXW7 regulates DISC1 stability via the ubiquitin-proteosome system.
Mol. Psychiatry 23 1278 1286 (2018)
PMID: 28727686 DOI: 10.1038/mp.2017.138

Abstact

Disrupted in schizophrenia 1 (DISC1) is a multi-functional scaffolding protein that has been associated with neuropsychiatric disease. The role of DISC1 is to assemble protein complexes that promote neural development and signaling, hence tight control of the concentration of cellular DISC1 in neurons is vital to brain function. Using structural and biochemical techniques, we show for we believe the first time that not only is DISC1 turnover elicited by the ubiquitin proteasome system (UPS) but that it is orchestrated by the F-Box protein, FBXW7. We present the structure of FBXW7 bound to the DISC1 phosphodegron motif and exploit this information to prove that disruption of the FBXW7-DISC1 complex results in a stabilization of DISC1. This action can counteract DISC1 deficiencies observed in neural progenitor cells derived from induced pluripotent stem cells from schizophrenia patients with a DISC1 frameshift mutation. Thus manipulation of DISC1 levels via the UPS may provide a novel method to explore DISC1 function.

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Primary Citation of related structures