National Institutes of Health/National Cancer Institute (NIH/NCI)
U54 CA209891
United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35 GM139636
United States
Citation
Journal: Nat Commun / Year: 2023 Title: Structural insights into regulation of the PEAK3 pseudokinase scaffold by 14-3-3. Authors: Hayarpi Torosyan / Michael D Paul / Antoine Forget / Megan Lo / Devan Diwanji / Krzysztof Pawłowski / Nevan J Krogan / Natalia Jura / Kliment A Verba / Abstract: PEAK pseudokinases are molecular scaffolds which dimerize to regulate cell migration, morphology, and proliferation, as well as cancer progression. The mechanistic role dimerization plays in PEAK ...PEAK pseudokinases are molecular scaffolds which dimerize to regulate cell migration, morphology, and proliferation, as well as cancer progression. The mechanistic role dimerization plays in PEAK scaffolding remains unclear, as there are no structures of PEAKs in complex with their interactors. Here, we report the cryo-EM structure of dimeric PEAK3 in complex with an endogenous 14-3-3 heterodimer. Our structure reveals an asymmetric binding mode between PEAK3 and 14-3-3 stabilized by one pseudokinase domain and the SHED domain of the PEAK3 dimer. The binding interface contains a canonical phosphosite-dependent primary interaction and a unique secondary interaction not observed in previous structures of 14-3-3/client complexes. Additionally, we show that PKD regulates PEAK3/14-3-3 binding, which when prevented leads to PEAK3 nuclear enrichment and distinct protein-protein interactions. Altogether, our data demonstrate that PEAK3 dimerization forms an unusual secondary interface for 14-3-3 binding, facilitating 14-3-3 regulation of PEAK3 localization and interactome diversity.
History
Deposition
Jul 21, 2022
Deposition site: RCSB / Processing site: RCSB
Revision 1.0
Jun 28, 2023
Provider: repository / Type: Initial release
Revision 1.1
Jun 12, 2024
Group: Data collection / Category: chem_comp_atom / chem_comp_bond
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