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Crystal Structure of the FERM-SH2 Module of Human Jak2

Journal Article · · PLoS ONE
 [1];  [2];  [1];  [3]
  1. Dana-Farber Cancer Inst., Boston, MA (United States); Harvard Medical School, Boston, MA (United States)
  2. Forma Therapeutics, Watertown, MA (United States); Dana-Farber Cancer Inst., Boston, MA (United States); Harvard Medical School, Boston, MA (United States)
  3. Yale Univ. School of Medicine, New Haven, CT (United States)

Jak-family tyrosine kinases mediate signaling from diverse cytokine receptors. Binding of Jaks to their cognate receptors is mediated by their N-terminal region, which contains FERM and SH2 domains. Here we describe the crystal structure of the FERM-SH2 region of Jak2 at 3.0Å resolution. The structure reveals that these domains and their flanking linker segments interact intimately to form an integrated structural module. The Jak2 FERM-SH2 structure closely resembles that recently described for Tyk2, another member of the Jak family. While the overall architecture and interdomain orientations are preserved between Jak2 and Tyk2, we identify residues in the putative receptor-binding groove that differ between the two and may contribute to the specificity of receptor recognition. Analysis of Jak mutations that are reported to disrupt receptor binding reveals that they lie in the hydrophobic core of the FERM domain, and are thus expected to compromise the structural integrity of the FERM-SH2 unit. Similarly, analysis of mutations in Jak3 that are associated with severe combined immunodeficiency suggests that they compromise Jak3 function by destabilizing the FERM-SH2 structure.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Inst. of Health
OSTI ID:
1274764
Journal Information:
PLoS ONE, Journal Name: PLoS ONE Journal Issue: 5 Vol. 11; ISSN 1932-6203
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

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Cited By (12)

The Janus Kinase (JAK) FERM and SH2 Domains: Bringing Specificity to JAK–Receptor Interactions journal April 2017
The Growth Hormone Receptor: Mechanism of Receptor Activation, Cell Signaling, and Physiological Aspects journal February 2018
Parthenolide Inhibits STAT3 Signaling by Covalently Targeting Janus Kinases journal June 2018
Are peptides a solution for the treatment of hyperactivated JAK3 pathways? journal March 2019
Erratum: Rethinking JAK2 inhibition: towards novel strategies of more specific and versatile Janus kinase inhibition journal December 2017
Rethinking JAK2 inhibition: towards novel strategies of more specific and versatile janus kinase inhibition journal January 2017
Xanthatin inhibits STAT3 and NF‐κB signalling by covalently binding to JAK and IKK kinases journal April 2019
Mechanism of homodimeric cytokine receptor activation and dysregulation by oncogenic mutations journal February 2020
Phosphorylation of Janus kinase 1 (JAK1) by AMP-activated protein kinase (AMPK) links energy sensing to anti-inflammatory signaling journal November 2016
Mechanistic Insights into Regulation of JAK2 Tyrosine Kinase journal January 2018
Mechanism of homodimeric cytokine receptor activation and dysregulation by oncogenic mutations text January 2019
Receptor-mediated dimerization of JAK2 FERM domains is required for JAK2 activation journal July 2018

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