Adapter protein implicated in the regulation of a large spectrum of both general and specialized signaling pathways. Binds to a large number of partners, usually by recognition of a phosphoserine or phosphothreonine motif. Binding generally results in the modulation of the activity of the binding partner. Homodimer. Interacts with MDM4 (phosphorylated); negatively regulates MDM4 activity toward TP53. Interacts with RAF1, SSH1 and CRTC2/TORC2. Interacts with ABL1 (phosphorylated form); the interaction retains it in the cytoplasm. Interacts with GAB2, SAMSN1 and SIRT2 (By similarity). Interacts with PKA-phosphorylated AANAT.Interacts with the 'Thr-369' phosphorylated form of DAPK2 (By similarity). Interacts with PI4KB, TBC1D22A and TBC1D22B (By similarity). Interacts with SLITRK1 (By similarity). Interacts with LRRK2; this interaction is dependent on LRRK2 phosphorylation (By similarity). Interacts with MARK2 and MARK3 (By similarity). Interacts with MEFV (By similarity). Interacts with ENDOG, TSC2 and PIK3C3; interaction with ENDOG weakens its interaction with TSC2 and PIK3C3 (By similarity).Interacts with TH (phosphorylated form); one YWHAG dimer bounds to one TH tetramer, this interaction may influence the phosphorylation and dephosphorylation of TH (By similarity). N-terminus residue is acetylated. Belongs to the 14-3-3 family.