Definition: Proteins and peptides that are involved in SIGNAL TRANSDUCTION within the cell. Included here are peptides and proteins that regulate the activity of TRANSCRIPTION FACTORS and cellular processes in response to signals from CELL SURFACE RECEPTORS. Intracellular signaling peptide and proteins may be part of an enzymatic signaling cascade or act through binding to and modifying the action of other signaling factors.
don't confuse with SIGNAL PEPTIDES entry term to PROTEIN SORTING SIGNALS; INTERCELLULAR SIGNALING PEPTIDES AND PROTEINS is also available
protein phosphatase inhibitor-1 [ NIPP-1,NIPP1 protein,NIPP1 protein, mouse,Ppp1r8 protein, mouse,nuclear inhibitory polypeptide of protein phosphatase-1,nuclear inhibitory polypeptide of protein phosphatase-1, mouse,phosphatase inhibitor 1,phosphorylase phosphatase inhibitor 1,protein phosphatase 1, regulatory (inhibitor) subunit 8, mouse ] 16-18 kDa heat-stable protein which inhibits phosphorylase phosphatase in skeletal muscle & other tissue; inhibitor of protein phosphatase after it has been phosphorylated by cyclic AMP-dependent prot