Beyond Static Tethering at Membrane Contact Sites: Structural Dynamics and Functional Implications of VAP Proteins VAP A Antibody BSA Free ER protein VAP establish membrane contact sites VAP spatially stabilizes dendritic mitochondria to locally fuel synaptic plasticity preLights The VAP protein family: from cellular functions to motor neuron disease ScienceDirect VAP A intrinsically disordered regions enable versatile tethering at membrane contact sites: Developmental Cell