Q3T0E7 (PP1A_BOVIN) Reviewed, UniProtKB/Swiss-Prot
Last modified April 16, 2014. Version 73. History...
Names and origin
|Protein names||Recommended name:|
Serine/threonine-protein phosphatase PP1-alpha catalytic subunit
|Organism||Bos taurus (Bovine) [Reference proteome]|
|Taxonomic identifier||9913 [NCBI]|
|Taxonomic lineage||Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Laurasiatheria › Cetartiodactyla › Ruminantia › Pecora › Bovidae › Bovinae › Bos|
|Sequence length||330 AA.|
|Sequence processing||The displayed sequence is further processed into a mature form.|
|Protein existence||Evidence at transcript level|
General annotation (Comments)
Protein phosphatase that associates with over 200 regulatory proteins to form highly specific holoenzymes which dephosphorylate hundreds of biological targets. Protein phosphatase 1 (PP1) is essential for cell division, and participates in the regulation of glycogen metabolism, muscle contractility and protein synthesis. Involved in regulation of ionic conductances and long-term synaptic plasticity. May play an important role in dephosphorylating substrates such as the postsynaptic density-associated Ca2+/calmodulin dependent protein kinase II. Component of the PTW/PP1 phosphatase complex, which plays a role in the control of chromatin structure and cell cycle progression during the transition from mitosis into interphase. Regulates NEK2 function in terms of kinase activity and centrosome number and splitting, both in the presence and absence of radiation-induced DNA damage. Regulator of neural tube and optic fissure closure, and enteric neural crest cell (ENCCs) migration during development By similarity.
[a protein]-serine/threonine phosphate + H2O = [a protein]-serine/threonine + phosphate.
Binds 1 iron ion per subunit By similarity.
Binds 1 manganese ion per subunit By similarity.
PP1 comprises a catalytic subunit, PPP1CA, PPP1CB or PPP1CC, which is folded into its native form by inhibitor 2 and glycogen synthetase kinase 3, and then complexed to one or several targeting or regulatory subunits. PPP1R12A, PPP1R12B and PPP1R12C mediate binding to myosin. PPP1R3A (in skeletal muscle), PPP1R3B (in liver), PPP1R3C, PPP1R3D and PPP1R3F (in brain) mediate binding to glycogen. Interacts with PPP1R15A and PPP1R15B; the interactions mediate binding to EIF2S1. Part of a complex containing PPP1R15B, PP1 and NCK1/2. Component of the MLL5-L complex, at least composed of KMT2E/MLL5, STK38, PPP1CA, PPP1CB, PPP1CC, HCFC1, ACTB and OGT. Interacts with PPP1R9A, PPP1R9B and PPP1R7. Interacts with YLPM1. Forms a complex with ILF2, ILF3, YLPM1, KHDRBS1, RBMX and NCOA5. Interacts with NOM1 and PPP1R8. Interacts with PPP1R16B. Interacts with RPSA only in the presence of PPP1R16B. Component of the PTW/PP1 phosphatase complex, composed of PPP1R10/PNUTS, TOX4, WDR82, and PPP1CA or PPP1CB or PPP1CC. Interacts with PPP1R10/PNUTS and PPP1R8. Interacts with WDR82 in the presence of PPP1R10/PNUTS. Interacts with PPP1R39. transition from mitosis into interphase. Interacts with TRIM28; the interaction dephosphorylates TRIM28 on 'Ser-824' and forms a complex at the p21 promoter site. Interacts with NEK2. Interacts with PHACTR4; which acts as an activator of PP1 activity. Interacts with FER; this promotes phosphorylation at Thr-320 By similarity.
Cytoplasm By similarity. Nucleus By similarity. Nucleus › nucleoplasm By similarity. Nucleus › nucleolus By similarity. Note: Primarily nuclear and largely excluded from the nucleolus. Highly mobile in cells and can be relocalized through interaction with targeting subunits. NOM1 plays a role in targeting this protein to the nucleolus. In the presence of PPP1R8 relocalizes from the nucleus to nuclear speckles By similarity.
Phosphorylated. Dephosphorylated at Thr-320 in the presence of ionizing radiation By similarity.
Sequence annotation (Features)
|Feature key||Position(s)||Length||Description||Graphical view||Feature identifier|
|Initiator methionine||1||1||Removed By similarity|
|Chain||2 – 330||329||Serine/threonine-protein phosphatase PP1-alpha catalytic subunit||PRO_0000240131|
|Active site||125||1||Proton donor By similarity|
|Metal binding||64||1||Iron By similarity|
|Metal binding||66||1||Iron By similarity|
|Metal binding||92||1||Iron By similarity|
|Metal binding||92||1||Manganese By similarity|
|Metal binding||124||1||Manganese By similarity|
|Metal binding||173||1||Manganese By similarity|
|Metal binding||248||1||Manganese By similarity|
Amino acid modifications
|Modified residue||2||1||N-acetylserine By similarity|
|Modified residue||305||1||N6-acetyllysine By similarity|
|Modified residue||306||1||Phosphotyrosine By similarity|
|Modified residue||320||1||Phosphothreonine By similarity|
|Protein Spotlight |
The things we forget - Issue 32 of March 2003
|BC102424 mRNA. Translation: AAI02425.1.|
|RefSeq||NP_001030393.1. NM_001035316.2. |
3D structure databases
|SMR||Q3T0E7. Positions 7-299. |
Protein-protein interaction databases
|BioGrid||172796. 3 interactions.|
|IntAct||Q3T0E7. 3 interactions.|
Protocols and materials databases
Genome annotation databases
Family and domain databases
|InterPro||IPR004843. Calcineurin-like_PHP_apaH. |
|Pfam||PF00149. Metallophos. 1 hit. |
|PRINTS||PR00114. STPHPHTASE. |
|SMART||SM00156. PP2Ac. 1 hit. |
|PROSITE||PS00125. SER_THR_PHOSPHATASE. 1 hit. |
|Accession||Primary (citable) accession number: Q3T0E7|
|Entry status||Reviewed (UniProtKB/Swiss-Prot)|
|Annotation program||Chordata Protein Annotation Program|