Tracing water channels in cell surface receptors

G protein-coupled receptors (GPCRs) are the largest class of cell surface receptors in our cells, involved in signal transmission across the cell membrane. One of the biggest questions is how a signal recognized at the extracellular ...

Researchers 'film' the activation of an important receptor

An international team of researchers has succeeded in "filming" the activation of an important receptor. They froze the involved molecules at different points in time and photographed them under the electron microscope. They ...

The arrestin-GPCR connection

G-protein coupled receptors (GPCRs) are the "inbox" of environmental messages in mammalian cells. Because of their central role in signaling pathways, mutations resulting in abnormal GPCR functions cause a wide variety of ...

Gip1 structure places G proteins in lockdown

Heterotrimeric G proteins are important in G protein-coupled receptor signaling, which plays many roles in the detection of various environmental stimuli, including hormones, neurotransmitters, light, smells, and chemical ...

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