Could play a role in constitutive transport element (CTE)-mediated gene expression by association with DHX9. Increases CTE-dependent nuclear unspliced mRNA export (PubMed:10748171, PubMed:11402034). Proposed to target PRKACA to the nucleus but does not seem to be implicated in the binding of regulatory subunit II of PKA (PubMed:10761695, PubMed:11884601). May be involved in nuclear envelope breakdown and chromatin condensation. May be involved in anchoring nuclear membranes to chromatin in interphase and in releasing membranes from chromating at mitosis (PubMed:11034899). May regulate the initiation phase of DNA replication when associated with TMPO isoform Beta (PubMed:12538639). 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 seems to act redundantly with AKAP8 (PubMed:16980585). May be involved in regulation of pre-mRNA splicing (PubMed:17594903). (Microbial infection) In case of EBV infection, may target PRKACA to EBNA-LP-containing nuclear sites to modulate transcription from specific promoters. (Microbial infection) Can synergize with DHX9 to activate the CTE-mediated gene expression of type D retroviruses. (Microbial infection) In case of HIV-1 infection, involved in the DHX9-promoted annealing of host tRNA(Lys3) to viral genomic RNA as a primer in reverse transcription; in vitro negatively regulates DHX9 annealing activity. Interacts (via N-terminus) with DHX9 (via RGG region) (PubMed:10748171, PubMed:11402034). Interacts with TMPO isoform Beta, PRPF40A, RNF43, lamin-B (PubMed:11034899, PubMed:12538639 PubMed:16391387, PubMed:18313049). Interacts with HDAC3; increased during mitosis (PubMed:16980585). Interacts with EBV EBNA-LP (PubMed:11160753). Interacts with HIV-1 reverse transcriptase/ribonuclease H (PubMed:25034436). Colocalizes with PRPF40A in the nuclear matrix (PubMed:16391387). Nuclear at steady state but shuttles between the nucleus and cytoplasm (PubMed:10748171). The shuttling property has been questioned (PubMed:11034899). Colocalizes with EBNA-LP in PML bodies (PubMed:11884601). Ubiquitously expressed. Expressed in the brain cortex (at protein level). Phosphorylated on serine or threonine residues possibly by PKA; probably modulating the interaction with TMPO isoform Beta. Belongs to the AKAP95 family. Extended N-terminus.