Anchoring protein that mediates the subcellular compartmentation of cAMP-dependent protein kinase (PKA type II). Acts as an anchor for a PKA-signaling complex onto mitotic chromosomes, which is required for maintenance of chromosomes in a condensed form throughout mitosis. Recruits condensin complex subunit NCAPD2 to chromosomes required for chromatin condensation; the function appears to be independent from PKA-anchoring (By similarity). Specifically involved in recruitment of CAPD2 to, and condensation of maternal but not paternal chromosomes (PubMed:12082153). May help to deliver cyclin D/E to CDK4 to facilitate cell cycle progression (PubMed:14641107). Required for cell cycle G2/M transition and histone deacetylation during mitosis. In mitotic cells recruits HDAC3 to the vicinity of chromatin leading to deacetylation and subsequent phosphorylation at 'Ser-10' of histone H3; in this function may act redundantly with AKAP8L. Involved in nuclear retention of RPS6KA1 upon ERK activation thus inducing cell proliferation. May be involved in regulation of DNA replication by acting as scaffold for MCM2. Enhances HMT activity of the KMT2 family MLL4/WBP7 complex and is involved in transcriptional regulation. In a teratocarcinoma cell line is involved in retinoic acid-mediated induction of developmental genes implicating H3 'Lys-4' methylation. May be involved in recruitment of active CASP3 to the nucleus in apoptotic cells. May act as a carrier protein of GJA1 for its transport to the nucleus. May play a repressive role in the regulation of rDNA transcription. Preferentially binds GC-rich DNA in vitro. In cells, associates with ribosomal RNA (rRNA) chromatin, preferentially with rRNA promoter and transcribed regions (By similarity). Involved in modulation of Toll-like receptor signaling. Required for the cAMP-dependent suppression of TNF-alpha in early stages of LPS-induced macrophage activation; the function probably implicates targeting of PKA to NFKB1 (PubMed:19531803). Binds to the PKA RII-alpha regulatory subunit PRKAR2A (By similarity). Interacts (via C-terminus) with FIGN (PubMed:16751186). Interacts with NCAPD2, CCND3, CCNE1, MCM2, RPS6KA1, DDX5, PDE4A (By similarity). Interacts with MYCBP; MYCBP is translocated to the nucleus and the interaction prevents the association of the PKA catalytic subunit leading to suppression of PKA activity (PubMed:12414807). Interacts with CCND1, CASP3 (PubMed:14641107, PubMed:16227597). Interacts with NFKB1; detetcted in the cytoplasm (PubMed:19531803). Interacts with DPY30; mediating AKAP8 association with at least the MLL4/WBP7 HMT complex. Interacts with HDAC3; increased during mitosis. Interacts with GJA1; in the nucleus and in the nuclear membrane; the nuclear association increases with progress of cell cycle G1, S and G2 phase and decreases in M phase (By similarity). Associated with the nuclear matrix (By similarity). Exhibits partial localization to the nucleolus in interphase, possibly to the fibrillary center and/or to the dense fibrillary component (By similarity). Redistributed and detached from condensed chromatin during mitosis (By similarity). Localizes specifically to the vicinity of the meiotic spindle in metaphase II oocytes (PubMed:12082153). Weakly expressed in metaphase II oocytes. Strongly up-regulated after fertilization at the pronuclear stage and restricted to the female pronucleus. Subsequently localized to the nucleus of each blastomere and on condensed chromosomes in mitotic cells. Phosphorylated on tyrosine residues probably by SRC subfamily protein kinases; multiple phosphorylation is leading to dissociation from nuclear structures implicated in chromatin structural changes. AKAP8 and FIGN double mutant mice die soon after birth due to cleft palate. Belongs to the AKAP95 family.