This Journal Club will present on a cryo-EM structure of the mouse thrombopoietin (TPO) receptor (MPL) bound to its ligand (TPO), revealing key interaction sites and pathogenic mutations. Through molecular dynamics simulations and structural modeling of the human MPL/TPO/JAK2 complex, Dr. Bratkowski and Dr. Paddock describe mechanisms of receptor activation, JAK2 dimerization, and downstream signaling, offering novel insights into both normal platelet production and disease-associated mutations.

Learning Objectives

A Structural Understanding of TPO/MPL/JAK2 Signaling: understand how cryo-EM and molecular dynamics studies elucidate the detailed molecular architecture of the TPO receptor complex, revealing how specific domains and mutations affect receptor activation and signaling. Implications for Disease Mechanisms and Therapeutics: understand novel structural insights which explain the basis of disease-causing mutations (e.g., MPL and JAK2 V617F).