eLife assessment
In this manuscript, Chakraborty et al address the role of IP3R1 in regulating store-operated calcium entry in neurons and neural progenitors. Long-standing observations in non-neuronal cells have shown that IP3Rs are not required for SOCE. In contrast to those findings, this manuscript determines that in neuronal cells, knockdown of IP3R1 suppresses SOCE by disrupting ER-plasma membrane contact sites. The paper supports a novel role for IP3R1 as a tether in promoting membrane contact sites which would have broad implications for a range of physiological processes including SOCE and lipid metabolism.