9CYO image
Entry Detail
PDB ID:
9CYO
Keywords:
Title:
Crystal structure of wild-type human PTP1B (PTPN1) at room temperature (298 K)
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2024-08-02
Release Date:
2024-08-21
Method Details:
Experimental Method:
Resolution:
1.94 Å
R-Value Free:
0.20
R-Value Work:
0.16
R-Value Observed:
0.17
Space Group:
P 31 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Tyrosine-protein phosphatase non-receptor type 1
Chain IDs:A
Chain Length:321
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Structures of human PTP1B variants reveal allosteric sites to target for weight loss therapy.
Biorxiv ? ? ? (2025)
PMID: 39149290 DOI: 10.1101/2024.08.05.603709

Abstact

Protein Tyrosine Phosphatase 1B (PTP1B) is a negative regulator of leptin signaling whose disruption protects against diet-induced obesity in mice. We investigated whether structural characterization of human PTP1B variant proteins might reveal precise mechanisms to target for weight loss therapy. We selected 12 rare variants for functional characterization from exomes from 997 people with persistent thinness and 200,000 people from UK Biobank. Seven of 12 variants impaired PTP1B function by increasing leptin-stimulated STAT3 phosphorylation in cells. Using room-temperature X-ray crystallography, hydrogen-deuterium exchange mass spectrometry, and computational modeling, we determined that human variants modulate the 3-dimensional structure of PTP1B through distinct allosteric conduits that energetically link distal, highly ligandable structural regions to the active site. These studies inform the design of allosteric PTP1B inhibitors for the treatment of obesity.

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