AKAP5

The A-kinase anchor proteins (AKAPs) are a group of structurally diverse proteins, which have the common function of binding to the regulatory subunit of protein kinase A (PKA) and confining the holoenzyme to discrete locations within the cell. This gene encodes a member of the AKAP family. The encoded protein binds to the RII-beta regulatory subunit of PKA, and also to protein kinase C and the phosphatase calcineurin. It is predominantly expressed in cerebral cortex and may anchor the PKA protein at postsynaptic densities (PSD) and be involved in the regulation of postsynaptic events. It is also expressed in T lymphocytes and may function to inhibit interleukin-2 transcription by disrupting calcineurin-dependent dephosphorylation of NFAT. [provided by RefSeq, Jul 2008]

Full Name

A-Kinase Anchoring Protein 5

Function

Multivalent scaffold protein that anchors the cAMP-dependent protein kinase/PKA to cytoskeletal and/or organelle-associated proteins, targeting the signal carried by cAMP to specific intracellular effectors (PubMed:1512224). Association with the beta2-adrenergic receptor (beta2-AR) not only regulates beta2-AR signaling pathway, but also the activation by PKA by switching off the beta2-AR signaling cascade. Plays a role in long term synaptic potentiation by regulating protein trafficking from the dendritic recycling endosomes to the plasma membrane and controlling both structural and functional plasticity at excitatory synapses (PubMed:25589740).

Biological Process

Adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway Source: UniProtKB
Chemical synaptic transmission Source: ProtInc
Negative regulation of adenylate cyclase activity Source: UniProtKB
Positive regulation of adenylate cyclase activity Source: GO_Central
Positive regulation of endosome to plasma membrane protein transport Source: UniProtKB
Positive regulation of long-term synaptic potentiation Source: UniProtKB
Positive regulation of protein localization to plasma membrane Source: UniProtKB
Regulation of protein kinase A signaling Source: UniProtKB
Signal transduction Source: ProtInc

Cellular Location

Postsynaptic recycling endosome membrane; Lipid-anchor.Associates with lipid rafts.

PTM

Palmitoylated (PubMed:21771783, PubMed:25589740). Palmitoylation at Cys-36 and Cys-129 play a key role in the targeting of AKAP5 to lipid rafts (PubMed:21771783). Palmitoylation by ZDHHC2 is required for AKAP5 function in LTP-stimulated recycling endosome exocytosis (PubMed:25589740).