Descriptions

PKA is a major intracellular receptor of cAMP and modulates diverse cellular signalings. The autoinhibitory sequence of the regulatory subunit may interact with the catalytic kinase domain and keeping the catalytic subunit inactive by blocking the active site in the absence of cAMP.

Autoinhibitory domains (AIDs)

Target domain

138-254 (Cyclic nucleotide-binding domain)

Relief mechanism

Ligand binding

Assay

Accessory elements

No accessory elements

Autoinhibited structure

Activated structure

1 structures for Q5ZM91

Entry ID Method Resolution Chain Position Source
AF-Q5ZM91-F1 Predicted AlphaFoldDB

No variants for Q5ZM91

Variant ID(s) Position Change Description Diseaes Association Provenance
No variants for Q5ZM91

No associated diseases with Q5ZM91

7 regional properties for Q5ZM91

Type Name Position InterPro Accession
domain Cyclic nucleotide-binding domain 138 - 254 IPR000595-1
domain Cyclic nucleotide-binding domain 256 - 377 IPR000595-2
domain cAMP-dependent protein kinase regulatory subunit, dimerization-anchoring domain 25 - 62 IPR003117
conserved_site Cyclic nucleotide-binding, conserved site 165 - 181 IPR018488-1
conserved_site Cyclic nucleotide-binding, conserved site 201 - 218 IPR018488-2
conserved_site Cyclic nucleotide-binding, conserved site 283 - 299 IPR018488-3
conserved_site Cyclic nucleotide-binding, conserved site 325 - 342 IPR018488-4

Functions

Description
EC Number
Subcellular Localization
  • Cell membrane
PANTHER Family
PANTHER Subfamily
PANTHER Protein Class
PANTHER Pathway Category No pathway information available

11 GO annotations of cellular component

Name Definition
axoneme The bundle of microtubules and associated proteins that forms the core of cilia (also called flagella) in eukaryotic cells and is responsible for their movements.
cAMP-dependent protein kinase complex An enzyme complex, composed of regulatory and catalytic subunits, that catalyzes protein phosphorylation. Inactive forms of the enzyme have two regulatory chains and two catalytic chains; activation by cAMP produces two active catalytic monomers and a regulatory dimer.
centrosome A structure comprised of a core structure (in most organisms, a pair of centrioles) and peripheral material from which a microtubule-based structure, such as a spindle apparatus, is organized. Centrosomes occur close to the nucleus during interphase in many eukaryotic cells, though in animal cells it changes continually during the cell-division cycle.
cytosol The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.
glutamatergic synapse A synapse that uses glutamate as a neurotransmitter.
immunological synapse An area of close contact between a lymphocyte (T-, B-, or natural killer cell) and a target cell formed through the clustering of particular signaling and adhesion molecules and their associated membrane rafts on both the lymphocyte and the target cell and facilitating activation of the lymphocyte, transfer of membrane from the target cell to the lymphocyte, and in some situations killing of the target cell through release of secretory granules and/or death-pathway ligand-receptor interaction.
multivesicular body A type of endosome in which regions of the limiting endosomal membrane invaginate to form internal vesicles; membrane proteins that enter the internal vesicles are sequestered from the cytoplasm.
neuromuscular junction The junction between the axon of a motor neuron and a muscle fiber. In response to the arrival of action potentials, the presynaptic button releases molecules of neurotransmitters into the synaptic cleft. These diffuse across the cleft and transmit the signal to the postsynaptic membrane of the muscle fiber, leading to a change in post-synaptic potential.
nucleotide-activated protein kinase complex A protein complex that possesses nucleotide-dependent protein kinase activity. The nucleotide can be AMP (in S. pombe and human) or ADP (in S. cerevisiae).
plasma membrane raft A membrane raft that is part of the plasma membrane.
sperm connecting piece The segment of the sperm flagellum that attaches to the implantation fossa of the nucleus in the sperm head; from the remnant of the centriole at this point, the axoneme extends throughout the length of the flagellum.

5 GO annotations of molecular function

Name Definition
cAMP binding Binding to cAMP, the nucleotide cyclic AMP (adenosine 3',5'-cyclophosphate).
cAMP-dependent protein kinase inhibitor activity Binds to and stops, prevents or reduces the activity of a cAMP-dependent protein kinase.
protein domain specific binding Binding to a specific domain of a protein.
protein kinase A catalytic subunit binding Binding to one or both of the catalytic subunits of protein kinase A.
ubiquitin protein ligase binding Binding to a ubiquitin protein ligase enzyme, any of the E3 proteins.

9 GO annotations of biological process

Name Definition
adenylate cyclase-activating G protein-coupled receptor signaling pathway A G protein-coupled receptor signaling pathway in which the signal is transmitted via the activation of adenylyl cyclase activity and a subsequent increase in the intracellular concentration of cyclic AMP (cAMP).
cardiac muscle cell proliferation The expansion of a cardiac muscle cell population by cell division.
cellular response to glucagon stimulus Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a glucagon stimulus.
mesoderm formation The process that gives rise to the mesoderm. This process pertains to the initial formation of the structure from unspecified parts.
negative regulation of activated T cell proliferation Any process that stops, prevents or reduces the rate or extent of activated T cell proliferation.
negative regulation of gene expression Any process that decreases the frequency, rate or extent of gene expression. Gene expression is the process in which a gene's coding sequence is converted into a mature gene product (protein or RNA).
positive regulation of insulin secretion Any process that activates or increases the frequency, rate or extent of the regulated release of insulin.
regulation of protein phosphorylation Any process that modulates the frequency, rate or extent of addition of phosphate groups into an amino acid in a protein.
sarcomere organization The myofibril assembly process that results in the organization of muscle actomyosin into sarcomeres. The sarcomere is the repeating unit of a myofibril in a muscle cell, composed of an array of overlapping thick and thin filaments between two adjacent Z discs.

22 homologous proteins in AiPD

UniProt AC Gene Name Protein Name Species Evidence Code
P00515 PRKAR2A cAMP-dependent protein kinase type II-alpha regulatory subunit Bos taurus (Bovine) EV
P31322 PRKAR2B cAMP-dependent protein kinase type II-beta regulatory subunit Bos taurus (Bovine) EV
P00514 PRKAR1A cAMP-dependent protein kinase type I-alpha regulatory subunit Bos taurus (Bovine) EV
P81900 Pka-R2 cAMP-dependent protein kinase type II regulatory subunit Drosophila melanogaster (Fruit fly) PR
P16905 Pka-R1 cAMP-dependent protein kinase type I regulatory subunit Drosophila melanogaster (Fruit fly) PR
P13861 PRKAR2A cAMP-dependent protein kinase type II-alpha regulatory subunit Homo sapiens (Human) PR
P31323 PRKAR2B cAMP-dependent protein kinase type II-beta regulatory subunit Homo sapiens (Human) PR
Q96M20 CNBD2 Cyclic nucleotide-binding domain-containing protein 2 Homo sapiens (Human) PR
P31321 PRKAR1B cAMP-dependent protein kinase type I-beta regulatory subunit Homo sapiens (Human) EV
P10644 PRKAR1A cAMP-dependent protein kinase type I-alpha regulatory subunit Homo sapiens (Human) EV
P12849 Prkar1b cAMP-dependent protein kinase type I-beta regulatory subunit Mus musculus (Mouse) PR
P12367 Prkar2a cAMP-dependent protein kinase type II-alpha regulatory subunit Mus musculus (Mouse) PR
P31324 Prkar2b cAMP-dependent protein kinase type II-beta regulatory subunit Mus musculus (Mouse) PR
Q9D5U8 Cnbd2 Cyclic nucleotide-binding domain-containing protein 2 Mus musculus (Mouse) PR
Q9DBC7 Prkar1a cAMP-dependent protein kinase type I-alpha regulatory subunit [Cleaved into: cAMP-dependent protein kinase type I-alpha regulatory subunit, N-terminally processed] Mus musculus (Mouse) SS
P05207 PRKAR2A cAMP-dependent protein kinase type II-alpha regulatory subunit Sus scrofa (Pig) SS
P07802 PRKAR1A cAMP-dependent protein kinase type I-alpha regulatory subunit Sus scrofa (Pig) SS
P12369 Prkar2b cAMP-dependent protein kinase type II-beta regulatory subunit Rattus norvegicus (Rat) PR
P12368 Prkar2a cAMP-dependent protein kinase type II-alpha regulatory subunit Rattus norvegicus (Rat) PR
P81377 Prkar1b cAMP-dependent protein kinase type I-beta regulatory subunit Rattus norvegicus (Rat) PR
P09456 Prkar1a cAMP-dependent protein kinase type I-alpha regulatory subunit Rattus norvegicus (Rat) SS
P30625 kin-2 cAMP-dependent protein kinase regulatory subunit Caenorhabditis elegans SS
10 20 30 40 50 60
MATSSSSSSE EERSLRECEL YVQKHNIQQL LKDCIVQLCT VRPDRPMGFL REYFERLEKE
70 80 90 100 110 120
ETKQLLNQQK SGSRSDSRED EISPPPPMNP VVKGRRRRGA ISAEVYTEED AASYVRKVIP
130 140 150 160 170 180
KDYKTMAALA KAIEKNVLFA HLDDNERSDI FDAMFPVTYI AGETVIQQGD EGDNFYVVDQ
190 200 210 220 230 240
GEMDVYVNNE WATSVGEGGS FGELALIYGT PRAATVKAKT NVKLWGIDRD SYRRILMGST
250 260 270 280 290 300
LRKRKMYEEF LSKVSILESL DKWERLTVAD ALEPVQFEDG QKIVVQGEPG DEFFIILEGT
310 320 330 340 350 360
AAVLQRRSEN EEFVEVGRLA PSDYFGEIAL LMNRPRAATV VARGLLKCVK LDRPRFERVL
370 380
GPCSDILKRN IQQYNSFVSL SV