SLP adapter and CSK-interacting membrane protein (SCIMP) is a lipid tetraspanin-associated transmembrane adapter/mediator involved in major histocompatibility complex class II (MHC-II) signaling transduction []. SCIMP is expressed in B cells and other professional antigen-presenting cells (APCs) and is localised in the immunological synapse. Upon MHC-II stimulation, phosphorylated SCIMP binds to the SLP65 and to the inhibitorykinase Csk. SLP65 binding initiates the downstream signaling cascades, while Csk binding functions as a negative regulatory loop [].
