Membranes prime the RapGEF EPAC1 to transduce cAMP signaling
Abstract EPAC1, a cAMP-activated GEF for Rap GTPases, is a major transducer of cAMP signaling and a therapeutic target in cardiac diseases.The recent discovery that cAMP is compartmentalized in membrane-proximal nanodomains challenged the current model of EPAC1 activation in the cytosol.Here, we Baggies discover that anionic membranes are a major c