ArticlebioRxiv : the preprint server for biology2025
Two-Step Mechanism of Bruton's Tyrosine Kinase Membrane Recruitment and Activation.
Article in bioRxiv : the preprint server for biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Peripheral membrane proteins (PMPs) are critical mediators of signaling cascades initiated via activation of cell-surface receptors. Their functions rely on their innate ability to interact with membranes dynamically in response to rapidly changing cellular conditions. This membrane recruitment may occur via high-affinity interactions with specific lipids or transient, low-affinity membrane interactions. These weak and dynamic interactions that are critical regulators of protein function are challenging to capture. Taking Bruton's Tyrosine Kinase (BTK), a non-receptor tyrosine kinase essential for B cell activation, as an example, we demonstrate a native mass spectrometry (nMS) platform to understand the recruitment of PMPs by directly studying it from lipid bilayers customized to target membranes. Our data demonstrates that BTK recognizes phosphatidylserine (PS) through sites distinct from phosphatidylinositol (3,4,5) phosphate (PIP
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