Adapter protein that enhances the efficiency of the MAP kinase cascade. Facilitates the activation of MAPKAPK2 . Heterodimer with MAP2K1IP1. Interacts with ERK and MEK1. Defects in ROBLD3 are the cause of immunodeficiency due to defect in MAPBP-interacting protein. This form of primary immunodeficiency syndrome includes congenital neutropenia, partial albinism, short stature and B-cell and cytotoxic T-cell deficiency. Two alternatively spliced isoforms of the human protein have been described. Note: This description may include information from UniProtKB.
Protein type: Adaptor/scaffold
Cellular Component: lysosomal membrane; late endosome
Molecular Function: protein binding; guanyl-nucleotide exchange factor activity; protein complex scaffold
Biological Process: activation of MAPKK activity; cell growth; positive regulation of TOR signaling pathway
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.