Extracellular HSP90 warms up integrins for an irisin workout.

Bourboulia, Dimitra; Woodford, Mark R; Mollapour, Mehdi · Cell Metab · 2023

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Abstract

The hormone-like protein irisin is involved in browning of adipose tissue and regulation of metabolism. Recently, Mu et al. identified the extracellular chaperone heat shock protein-90 (Hsp90) as the activating factor for "opening" αVβ5 integrin receptor, allowing for high-affinity irisin binding and effective signal transduction.

Medical subject headings