Gene/Proteome Database (LMPD)
LMPD ID
LMP001886
Gene ID
Species
Homo sapiens (Human)
Gene Name
protein kinase, AMP-activated, alpha 1 catalytic subunit
Gene Symbol
Synonyms
AMPK; AMPKa1
Alternate Names
5'-AMP-activated protein kinase catalytic subunit alpha-1;,ACACA kinase; AMPK alpha 1; HMGCR kinase; AMPK subunit alpha-1; tau-protein kinase PRKAA1; acetyl-CoA carboxylase kinase; AMP -activate kinase alpha 1 subunit; hydroxymethylglutaryl-CoA reductase kinase; AMP-activated protein kinase, catalytic, alpha-1', "5'-AMP-activated protein kinase, catalytic alpha-1 chain
Chromosome
5
Map Location
5p12
EC Number
2.7.11.1
Summary
The protein encoded by this gene belongs to the ser/thr protein kinase family. It is the catalytic subunit of the 5'-prime-AMP-activated protein kinase (AMPK). AMPK is a cellular energy sensor conserved in all eukaryotic cells. The kinase activity of AMPK is activated by the stimuli that increase the cellular AMP/ATP ratio. AMPK regulates the activities of a number of key metabolic enzymes through phosphorylation. It protects cells from stresses that cause ATP depletion by switching off ATP-consuming biosynthetic pathways. Alternatively spliced transcript variants encoding distinct isoforms have been observed. [provided by RefSeq, Jul 2008]
Orthologs
Proteins
5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 1 | |
---|---|
Refseq ID | NP_006242 |
Protein GI | 94557301 |
UniProt ID | Q13131 |
mRNA ID | NM_006251 |
Length | 559 |
RefSeq Status | REVIEWED |
MRRLSSWRKMATAEKQKHDGRVKIGHYILGDTLGVGTFGKVKVGKHELTGHKVAVKILNRQKIRSLDVVGKIRREIQNLKLFRHPHIIKLYQVISTPSDIFMVMEYVSGGELFDYICKNGRLDEKESRRLFQQILSGVDYCHRHMVVHRDLKPENVLLDAHMNAKIADFGLSNMMSDGEFLRTSCGSPNYAAPEVISGRLYAGPEVDIWSSGVILYALLCGTLPFDDDHVPTLFKKICDGIFYTPQYLNPSVISLLKHMLQVDPMKRATIKDIREHEWFKQDLPKYLFPEDPSYSSTMIDDEALKEVCEKFECSEEEVLSCLYNRNHQDPLAVAYHLIIDNRRIMNEAKDFYLATSPPDSFLDDHHLTRPHPERVPFLVAETPRARHTLDELNPQKSKHQGVRKAKWHLGIRSQSRPNDIMAEVCRAIKQLDYEWKVVNPYYLRVRRKNPVTSTYSKMSLQLYQVDSRTYLLDFRSIDDEITEAKSGTATPQRSGSVSNYRSCQRSDSDAEAQGKSSEVSLTSSVTSLDSSPVDLTPRPGSHTIEFFEMCANLIKILAQ |
5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 2 | |
---|---|
Refseq ID | NP_996790 |
Protein GI | 94557299 |
UniProt ID | Q13131 |
mRNA ID | NM_206907 |
Length | 574 |
RefSeq Status | REVIEWED |
MRRLSSWRKMATAEKQKHDGRVKIGHYILGDTLGVGTFGKVKVGKHELTGHKVAVKILNRQKIRSLDVVGKIRREIQNLKLFRHPHIIKLYQVISTPSDIFMVMEYVSGGELFDYICKNGRKSDVPGVVKTGSTKELDEKESRRLFQQILSGVDYCHRHMVVHRDLKPENVLLDAHMNAKIADFGLSNMMSDGEFLRTSCGSPNYAAPEVISGRLYAGPEVDIWSSGVILYALLCGTLPFDDDHVPTLFKKICDGIFYTPQYLNPSVISLLKHMLQVDPMKRATIKDIREHEWFKQDLPKYLFPEDPSYSSTMIDDEALKEVCEKFECSEEEVLSCLYNRNHQDPLAVAYHLIIDNRRIMNEAKDFYLATSPPDSFLDDHHLTRPHPERVPFLVAETPRARHTLDELNPQKSKHQGVRKAKWHLGIRSQSRPNDIMAEVCRAIKQLDYEWKVVNPYYLRVRRKNPVTSTYSKMSLQLYQVDSRTYLLDFRSIDDEITEAKSGTATPQRSGSVSNYRSCQRSDSDAEAQGKSSEVSLTSSVTSLDSSPVDLTPRPGSHTIEFFEMCANLIKILAQ |
Gene Information
Entrez Gene ID
Gene Name
protein kinase, AMP-activated, alpha 1 catalytic subunit
Gene Symbol
Species
Homo sapiens
Gene Ontology (GO Annotations)
GO ID | Source | Type | Description |
---|---|---|---|
GO:0031588 | ISS:UniProtKB | C | AMP-activated protein kinase complex |
GO:0016324 | IEA:Ensembl | C | apical plasma membrane |
GO:0005737 | IDA:HPA | C | cytoplasm |
GO:0005829 | TAS:Reactome | C | cytosol |
GO:0005622 | IC:UniProtKB | C | intracellular |
GO:0005634 | ISS:UniProtKB | C | nucleus |
GO:0004679 | IDA:UniProtKB | F | AMP-activated protein kinase activity |
GO:0005524 | IEA:UniProtKB-KW | F | ATP binding |
GO:0050405 | IEA:UniProtKB-EC | F | [acetyl-CoA carboxylase] kinase activity |
GO:0047322 | IEA:UniProtKB-EC | F | [hydroxymethylglutaryl-CoA reductase (NADPH)] kinase activity |
GO:0004691 | NAS:UniProtKB | F | cAMP-dependent protein kinase activity |
GO:0003682 | ISS:UniProtKB | F | chromatin binding |
GO:0035174 | ISS:UniProtKB | F | histone serine kinase activity |
GO:0046872 | IEA:UniProtKB-KW | F | metal ion binding |
GO:0004672 | IDA:UniProtKB | F | protein kinase activity |
GO:0050321 | IEA:UniProtKB-EC | F | tau-protein kinase activity |
GO:0016055 | IEA:UniProtKB-KW | P | Wnt signaling pathway |
GO:0000187 | NAS:UniProtKB | P | activation of MAPK activity |
GO:0006914 | IEA:UniProtKB-KW | P | autophagy |
GO:0007050 | TAS:Reactome | P | cell cycle arrest |
GO:0071361 | IEA:Ensembl | P | cellular response to ethanol |
GO:0042149 | ISS:UniProtKB | P | cellular response to glucose starvation |
GO:0070301 | IEA:Ensembl | P | cellular response to hydrogen peroxide |
GO:0071456 | IEA:Ensembl | P | cellular response to hypoxia |
GO:0031669 | ISS:UniProtKB | P | cellular response to nutrient levels |
GO:0006695 | IEA:UniProtKB-KW | P | cholesterol biosynthetic process |
GO:0009631 | IEA:Ensembl | P | cold acclimation |
GO:0006633 | IEA:UniProtKB-KW | P | fatty acid biosynthetic process |
GO:0055089 | ISS:UniProtKB | P | fatty acid homeostasis |
GO:0019395 | IEA:Ensembl | P | fatty acid oxidation |
GO:0042593 | ISS:UniProtKB | P | glucose homeostasis |
GO:0006006 | IEA:Ensembl | P | glucose metabolic process |
GO:0008286 | TAS:Reactome | P | insulin receptor signaling pathway |
GO:0008610 | ISS:UniProtKB | P | lipid biosynthetic process |
GO:0032007 | ISS:UniProtKB | P | negative regulation of TOR signaling |
GO:0043066 | ISS:UniProtKB | P | negative regulation of apoptotic process |
GO:2001274 | IEA:Ensembl | P | negative regulation of glucose import in response to insulin stimulus |
GO:0046318 | NAS:UniProtKB | P | negative regulation of glucosylceramide biosynthetic process |
GO:0050995 | ISS:UniProtKB | P | negative regulation of lipid catabolic process |
GO:0010508 | ISS:UniProtKB | P | positive regulation of autophagy |
GO:0008284 | IEA:Ensembl | P | positive regulation of cell proliferation |
GO:0045542 | NAS:UniProtKB | P | positive regulation of cholesterol biosynthetic process |
GO:0010628 | IDA:UniProtKB | P | positive regulation of gene expression |
GO:0045821 | ISS:UniProtKB | P | positive regulation of glycolytic process |
GO:0051291 | IEA:Ensembl | P | protein heterooligomerization |
GO:0006468 | IDA:UniProtKB | P | protein phosphorylation |
GO:0042752 | ISS:UniProtKB | P | regulation of circadian rhythm |
GO:2000505 | ISS:UniProtKB | P | regulation of energy homeostasis |
GO:0006355 | IEA:UniProtKB-KW | P | regulation of transcription, DNA-templated |
GO:0060627 | IEA:Ensembl | P | regulation of vesicle-mediated transport |
GO:0009411 | IEA:Ensembl | P | response to UV |
GO:0014823 | IEA:Ensembl | P | response to activity |
GO:0031000 | IEA:Ensembl | P | response to caffeine |
GO:1901563 | IEA:Ensembl | P | response to camptothecin |
GO:0010332 | ISS:UniProtKB | P | response to gamma radiation |
GO:0001666 | NAS:UniProtKB | P | response to hypoxia |
GO:0048511 | IEA:UniProtKB-KW | P | rhythmic process |
GO:0007165 | TAS:ProtInc | P | signal transduction |
GO:0006351 | IEA:UniProtKB-KW | P | transcription, DNA-templated |
KEGG Pathway Links
Domain Information
InterPro Annotations
Accession | Description |
---|---|
IPR028797 | 5'-AMP-activated protein kinase catalytic subunit alpha-1 |
IPR028375 | KA1 domain/Ssp2 C-terminal domain |
IPR000719 | Protein kinase domain |
IPR017441 | Protein kinase, ATP binding site |
IPR011009 | Protein kinase-like domain |
IPR008271 | Serine/threonine-protein kinase, active site |
IPR002290 | Serine/threonine/dual specificity protein kinase, catalytic domain |
UniProt Annotations
Entry Information
Gene Name
protein kinase, AMP-activated, alpha 1 catalytic subunit
Protein Entry
AAPK1_HUMAN
UniProt ID
Species
Human
Comments
Comment Type | Description |
---|---|
Alternative Products | Event=Alternative splicing; Named isoforms=2; Name=1; IsoId=Q13131-1; Sequence=Displayed; Name=2; IsoId=Q13131-2; Sequence=VSP_035431; |
Catalytic Activity | ATP + [acetyl-CoA carboxylase] = ADP + [acetyl-CoA carboxylase] phosphate. |
Catalytic Activity | ATP + [hydroxymethylglutaryl-CoA reductase (NADPH)] = ADP + [hydroxymethylglutaryl-CoA reductase (NADPH)] phosphate. |
Catalytic Activity | ATP + [tau protein] = ADP + [tau protein] phosphate. |
Catalytic Activity | ATP + a protein = ADP + a phosphoprotein. |
Cofactor | Name=Mg(2+); Xref=ChEBI |
Domain | The AIS (autoinhibitory sequence) region shows some sequence similarity with the ubiquitin-associated domains and represses kinase activity. {ECO |
Enzyme Regulation | Activated by phosphorylation on Thr-183. Binding of AMP to non-catalytic gamma subunit (PRKAG1, PRKAG2 or PRKAG3) results in allosteric activation, inducing phosphorylation on Thr-183. AMP-binding to gamma subunit also sustains activity by preventing dephosphorylation of Thr-183. ADP also stimulates Thr- 183 phosphorylation, without stimulating already phosphorylated AMPK. ATP promotes dephosphorylation of Thr-183, rendering the enzyme inactive. Under physiological conditions AMPK mainly exists in its inactive form in complex with ATP, which is much more abundant than AMP. AMPK is activated by antihyperglycemic drug metformin, a drug prescribed to patients with type 2 diabetes: in vivo, metformin seems to mainly inhibit liver gluconeogenesis. However, metformin can be used to activate AMPK in muscle and other cells in culture or ex vivo (PubMed:11602624). Selectively inhibited by compound C (6-[4-(2-Piperidin-1-yl-ethoxy)-phenyl)]- 3-pyridin-4-yl-pyyrazolo[1,5-a] pyrimidine. Activated by resveratrol, a natural polyphenol present in red wine, and S17834, a synthetic polyphenol. {ECO |
Function | Catalytic subunit of AMP-activated protein kinase (AMPK), an energy sensor protein kinase that plays a key role in regulating cellular energy metabolism. In response to reduction of intracellular ATP levels, AMPK activates energy-producing pathways and inhibits energy-consuming processes: inhibits protein, carbohydrate and lipid biosynthesis, as well as cell growth and proliferation. AMPK acts via direct phosphorylation of metabolic enzymes, and by longer-term effects via phosphorylation of transcription regulators. Also acts as a regulator of cellular polarity by remodeling the actin cytoskeleton; probably by indirectly activating myosin. Regulates lipid synthesis by phosphorylating and inactivating lipid metabolic enzymes such as ACACA, ACACB, GYS1, HMGCR and LIPE; regulates fatty acid and cholesterol synthesis by phosphorylating acetyl-CoA carboxylase (ACACA and ACACB) and hormone-sensitive lipase (LIPE) enzymes, respectively. Regulates insulin-signaling and glycolysis by phosphorylating IRS1, PFKFB2 and PFKFB3. AMPK stimulates glucose uptake in muscle by increasing the translocation of the glucose transporter SLC2A4/GLUT4 to the plasma membrane, possibly by mediating phosphorylation of TBC1D4/AS160. Regulates transcription and chromatin structure by phosphorylating transcription regulators involved in energy metabolism such as CRTC2/TORC2, FOXO3, histone H2B, HDAC5, MEF2C, MLXIPL/ChREBP, EP300, HNF4A, p53/TP53, SREBF1, SREBF2 and PPARGC1A. Acts as a key regulator of glucose homeostasis in liver by phosphorylating CRTC2/TORC2, leading to CRTC2/TORC2 sequestration in the cytoplasm. In response to stress, phosphorylates 'Ser-36' of histone H2B (H2BS36ph), leading to promote transcription. Acts as a key regulator of cell growth and proliferation by phosphorylating TSC2, RPTOR and ATG1/ULK1: in response to nutrient limitation, negatively regulates the mTORC1 complex by phosphorylating RPTOR component of the mTORC1 complex and by phosphorylating and activating TSC2. In response to nutrient limitation, promotes autophagy by phosphorylating and activating ATG1/ULK1. AMPK also acts as a regulator of circadian rhythm by mediating phosphorylation of CRY1, leading to destabilize it. May regulate the Wnt signaling pathway by phosphorylating CTNNB1, leading to stabilize it. Also has tau-protein kinase activity: in response to amyloid beta A4 protein (APP) exposure, activated by CAMKK2, leading to phosphorylation of MAPT/TAU; however the relevance of such data remains unclear in vivo. Also phosphorylates CFTR, EEF2K, KLC1, NOS3 and SLC12A1. {ECO |
Interaction | P08238:HSP90AB1; NbExp=2; IntAct=EBI-1181405, EBI-352572; Q9Y478:PRKAB1; NbExp=5; IntAct=EBI-1181405, EBI-719769; O43741:PRKAB2; NbExp=6; IntAct=EBI-1181405, EBI-1053424; |
Ptm | Phosphorylated at Thr-183 by STK11/LKB1 in complex with STE20-related adapter-alpha (STRADA) pseudo kinase and CAB39. Also phosphorylated at Thr-183 by CAMKK2; triggered by a rise in intracellular calcium ions, without detectable changes in the AMP/ATP ratio. CAMKK1 can also phosphorylate Thr-183, but at a much lower level. Dephosphorylated by protein phosphatase 2A and 2C (PP2A and PP2C). Phosphorylated by ULK1 and ULK2; leading to negatively regulate AMPK activity and suggesting the existence of a regulatory feedback loop between ULK1, ULK2 and AMPK. Dephosphorylated by PPM1A and PPM1B. {ECO |
Ptm | Ubiquitinated. |
Sequence Caution | Sequence=AAA64850.1; Type=Erroneous initiation; Note=Translation N-terminally extended.; Evidence= ; Sequence=AAD43027.1; Type=Erroneous initiation; Note=Translation N-terminally extended.; Evidence= ; Sequence=AAH37303.1; Type=Erroneous initiation; Note=Translation N-terminally extended.; Evidence= ; Sequence=BAA36547.1; Type=Erroneous initiation; Note=Translation N-terminally extended.; Evidence= ; Sequence=BAG35788.1; Type=Erroneous initiation; Note=Translation N-terminally extended.; Evidence= ; |
Similarity | Belongs to the protein kinase superfamily. CAMK Ser/Thr protein kinase family. SNF1 subfamily. |
Similarity | Contains 1 protein kinase domain. |
Subcellular Location | Cytoplasm . Nucleus . Note=In response to stress, recruited by p53/TP53 to specific promoters. |
Subunit | AMPK is a heterotrimer of an alpha catalytic subunit (PRKAA1 or PRKAA2), a beta (PRKAB1 or PRKAB2) and a gamma non- catalytic subunits (PRKAG1, PRKAG2 or PRKAG3). Interacts with FNIP1 and FNIP2. {ECO |
Identical and Related Proteins
Unique RefSeq proteins for LMP001886 (as displayed in Record Overview)
Protein GI | Database | Accession | Length | Protein Name |
---|---|---|---|---|
94557301 | RefSeq | NP_006242 | 559 | 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 1 |
94557299 | RefSeq | NP_996790 | 574 | 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 2 |
Identical Sequences to LMP001886 proteins
Reference | Database | Accession | Length | Protein Name |
---|---|---|---|---|
GI:94557301 | GenBank | EAW56000.1 | 559 | protein kinase, AMP-activated, alpha 1 catalytic subunit, isoform CRA_a [Homo sapiens] |
GI:94557301 | GenBank | JAA13923.1 | 559 | protein kinase, AMP-activated, alpha 1 catalytic subunit [Pan troglodytes] |
GI:94557301 | GenBank | JAA13924.1 | 559 | protein kinase, AMP-activated, alpha 1 catalytic subunit [Pan troglodytes] |
GI:94557299 | GenBank | JAA13925.1 | 574 | protein kinase, AMP-activated, alpha 1 catalytic subunit [Pan troglodytes] |
GI:94557301 | RefSeq | XP_003274422.1 | 559 | PREDICTED: 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 1 [Nomascus leucogenys] |
GI:94557301 | RefSeq | XP_003811017.1 | 559 | PREDICTED: 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform X2 [Pan paniscus] |
GI:94557299 | RefSeq | XP_003811018.1 | 574 | PREDICTED: 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform X1 [Pan paniscus] |
GI:94557299 | RefSeq | XP_009238944.1 | 574 | PREDICTED: 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform X1 [Pongo abelii] |
GI:94557299 | RefSeq | XP_009447514.1 | 574 | PREDICTED: LOW QUALITY PROTEIN: 5'-AMP-activated protein kinase catalytic subunit alpha-1 [Pan troglodytes] |
GI:94557301 | SwissProt | Q13131.4 | 559 | RecName: Full=5'-AMP-activated protein kinase catalytic subunit alpha-1; Short=AMPK subunit alpha-1; AltName: Full=Acetyl-CoA carboxylase kinase; Short=ACACA kinase; AltName: Full=Hydroxymethylglutaryl-CoA reductase kinase; Short=HMGCR kinase; AltName: Full=Tau-protein kinase PRKAA1 [Homo sapiens] |
Related Sequences to LMP001886 proteins
Reference | Database | Accession | Length | Protein Name |
---|---|---|---|---|
GI:94557299 | GenBank | AAH48980.1 | 574 | Protein kinase, AMP-activated, alpha 1 catalytic subunit [Homo sapiens] |
GI:94557301 | GenBank | JAB11230.1 | 559 | 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 1 [Callithrix jacchus] |
GI:94557299 | GenBank | JAB11231.1 | 574 | 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 2 [Callithrix jacchus] |
GI:94557301 | GenBank | JAB16357.1 | 559 | 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 1 [Callithrix jacchus] |
GI:94557301 | GenBank | JAB16358.1 | 559 | 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 1 [Callithrix jacchus] |
GI:94557301 | GenBank | JAB31828.1 | 559 | 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 1 [Callithrix jacchus] |
GI:94557299 | GenBank | AIC54945.1 | 574 | PRKAA1, partial [synthetic construct] |
GI:94557301 | RefSeq | XP_004058959.1 | 559 | PREDICTED: 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 1 [Gorilla gorilla gorilla] |
GI:94557299 | RefSeq | XP_004058960.1 | 574 | PREDICTED: 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 2 [Gorilla gorilla gorilla] |
GI:94557299 | RefSeq | XP_003274423.2 | 645 | PREDICTED: 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform 2 [Nomascus leucogenys] |
GI:94557299 | RefSeq | XP_006733395.1 | 574 | PREDICTED: 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform X1 [Leptonychotes weddellii] |
GI:94557301 | RefSeq | XP_003899658.2 | 559 | PREDICTED: 5'-AMP-activated protein kinase catalytic subunit alpha-1 isoform X1 [Papio anubis] |