PPP1CA protein phosphatase 1 catalytic subunit alpha [Homo sapiens (human)] - Gene

Summary

Official Symbol: PPP1CAprovided by HGNC
Official Full Name: protein phosphatase 1 catalytic subunit alphaprovided by HGNC
Primary source: HGNC:HGNC:9281
See related: Ensembl:ENSG00000172531 MIM:176875; AllianceGenome:HGNC:9281
Gene type: protein coding
RefSeq status: REVIEWED
Organism: Homo sapiens
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as: PP1A; PP-1A; PPP1A; PP1alpha
Summary: The protein encoded by this gene is one of the three catalytic subunits of protein phosphatase 1 (PP1). This broadly expressed gene encodes the alpha subunit of the PP1 complex that associates with over 200 regulatory proteins to form holoenzymes which dephosphorylate their biological targets with high specificity. PP1 is a serine/threonine specific protein phosphatase known to be involved in the regulation of a variety of cellular processes, such as cell division, glycogen metabolism, muscle contractility, protein synthesis, and HIV-1 viral transcription. Increased PP1 activity has been observed in the end stage of heart failure. Studies suggest that PP1 is an important regulator of cardiac function and that PP1 deregulation is implicated in diabetes and multiple types of cancer. Three alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2020]
Expression: Ubiquitous expression in lymph node (RPKM 67.2), colon (RPKM 56.9) and 25 other tissues See more
Orthologs: mouse all
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Genomic context

Location:: 11q13.2

Exon count:: 7

Annotation release	Status	Assembly	Chr	Location
RS_2024_08	current	GRCh38.p14 (GCF_000001405.40)	11	NC_000011.10 (67398183..67401858, complement)
RS_2024_08	current	T2T-CHM13v2.0 (GCF_009914755.1)	11	NC_060935.1 (67392298..67395973, complement)
RS_2024_09	previous assembly	GRCh37.p13 (GCF_000001405.25)	11	NC_000011.9 (67165654..67169329, complement)

Chromosome 11 - NC_000011.10 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Expression

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See details

Project title: HPA RNA-seq normal tissues
Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
BioProject: PRJEB4337
Publication: PMID 24309898
Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

CircGPRC5A enhances colorectal cancer progress by stabilizing PPP1CA and inducing YAP dephosphorylation.
Title: CircGPRC5A enhances colorectal cancer progress by stabilizing PPP1CA and inducing YAP dephosphorylation.
Comprehensive analysis of PPPCs family reveals the clinical significance of PPP1CA and PPP4C in breast cancer.
Title: Comprehensive analysis of PPPCs family reveals the clinical significance of PPP1CA and PPP4C in breast cancer.
Protein phosphatase 1 acts as a RIF1 effector to suppress DSB resection prior to Shieldin action.
Title: Protein phosphatase 1 acts as a RIF1 effector to suppress DSB resection prior to Shieldin action.
Evolutionary crossroads of cell signaling: PP1 and PP2A substrate sites in intrinsically disordered regions.
Title: Evolutionary crossroads of cell signaling: PP1 and PP2A substrate sites in intrinsically disordered regions.
Oncogenic SNORD12B activates the AKT-mTOR-4EBP1 signaling in esophageal squamous cell carcinoma via nucleus partitioning of PP-1alpha.
Title: Oncogenic SNORD12B activates the AKT-mTOR-4EBP1 signaling in esophageal squamous cell carcinoma via nucleus partitioning of PP-1α.
LACTB suppresses melanoma progression by attenuating PP1A and YAP interaction.
Title: LACTB suppresses melanoma progression by attenuating PP1A and YAP interaction.
Protein phosphatase 1 alpha enhances glucocorticoid receptor activity by a mechanism involving phosphorylation of serine-211.
Title: Protein phosphatase 1 alpha enhances glucocorticoid receptor activity by a mechanism involving phosphorylation of serine-211.
Protein Phosphatase-1 Complex Disassembly by p97 is Initiated through Multivalent Recognition of Catalytic and Regulatory Subunits by the p97 SEP-domain Adapters.
Title: Protein Phosphatase-1 Complex Disassembly by p97 is Initiated through Multivalent Recognition of Catalytic and Regulatory Subunits by the p97 SEP-domain Adapters.
Dissecting the sequence determinants for dephosphorylation by the catalytic subunits of phosphatases PP1 and PP2A.
Title: Dissecting the sequence determinants for dephosphorylation by the catalytic subunits of phosphatases PP1 and PP2A.
The effect of decitabine on the expression and methylation of the PPP1CA, BTG2, and PTEN in association with changes in miR-125b, miR-17, and miR-181b in NALM6 cell line.
Title: The effect of decitabine on the expression and methylation of the PPP1CA, BTG2, and PTEN in association with changes in miR-125b, miR-17, and miR-181b in NALM6 cell line.

Submit: New GeneRIF Correction See all GeneRIFs (86)

Phenotypes

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Find tests for this gene in the NIH Genetic Testing Registry (GTR)

Review eQTL and phenotype association data in this region using PheGenI

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

HIV-1 interactions

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Protein interactions

Protein	Gene	Interaction	Pubs
Tat	tat	Protein phosphatase 1, catalytic subunit, alpha isoform (PPP1CA) is identified to interact with HIV-1 Tat mutant Nullbasic in HeLa cells by LC MS/MS	PubMed
	tat	Small molecular compounds prevent the interaction of HIV-1 Tat with protein phosphatase-1 (PP1) and the shuttling of PP1 to the nucleus	PubMed
	tat	PP1 interacts with Tat in part through the binding of Val(36) and Phe(38) of Tat to PP1, and Tat is involved in the nuclear and subnuclear targeting of PP1	PubMed
	tat	Expression of HIV-1 Tat upregulates the abundance of protein phosphatase 1, catalytic subunit, alpha isoform (PPP1CA) in the nucleoli of Jurkat T-cells	PubMed
	tat	Protein phosphatase-2A (PP2A) and protein phosphatase-1 (PP1) regulate HIV-1 Tat-activated transcription through dephosphorylation of CDK9	PubMed
	tat	Stimulation of HIV-1 Tat transactivation by protein phosphatase 1 (PP1) is inhibited by nuclear inhibitor of PP1 (NIPP1), indicating Tat function is regulated by PP1/NIPP1	PubMed
	tat	Protein phosphatase 1 (PP1) associates with HIV-1 Tat and stimulates Tat-mediated transactivation of the HIV-1 LTR promoter	PubMed

Go to the HIV-1, Human Interaction Database

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

GDB:197566 (e-PCR)
- UniSTS:155947

Ppp1ca (e-PCR), detects polymorphism
- UniSTS:472882

RH45249 (e-PCR)
- UniSTS:72044

PPP1CA (e-PCR)
- UniSTS:23991

Gene Ontology Provided by GOA

Function	Evidence Code	Pubs
enables MAP kinase serine/threonine phosphatase activity	IEA Inferred from Electronic Annotation more info
enables RNA polymerase II CTD heptapeptide repeat S2 phosphatase activity	IEA Inferred from Electronic Annotation more info
enables RNA polymerase II CTD heptapeptide repeat S5 phosphatase activity	IEA Inferred from Electronic Annotation more info
enables RNA polymerase II CTD heptapeptide repeat S7 phosphatase activity	IEA Inferred from Electronic Annotation more info
enables RNA polymerase II CTD heptapeptide repeat T4 phosphatase activity	IEA Inferred from Electronic Annotation more info
enables RNA polymerase II CTD heptapeptide repeat Y1 phosphatase activity	IEA Inferred from Electronic Annotation more info
enables cadherin binding involved in cell-cell adhesion	IDA Inferred from Direct Assay more info	PubMed
enables calmodulin-dependent protein phosphatase activity	IEA Inferred from Electronic Annotation more info
enables histone H2AXS140 phosphatase activity	IEA Inferred from Electronic Annotation more info
enables iron ion binding	IDA Inferred from Direct Assay more info	PubMed
enables myosin phosphatase activity	IEA Inferred from Electronic Annotation more info
enables phosphatase activity	ISS Inferred from Sequence or Structural Similarity more info
enables phosphoprotein phosphatase activity	ISS Inferred from Sequence or Structural Similarity more info
enables protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables protein phosphatase 1 binding	IEA Inferred from Electronic Annotation more info
enables protein serine/threonine phosphatase activity	IBA Inferred from Biological aspect of Ancestor more info
enables protein serine/threonine phosphatase activity	IDA Inferred from Direct Assay more info	PubMed
enables protein serine/threonine phosphatase activity	TAS Traceable Author Statement more info	PubMed
enables ribonucleoprotein complex binding	IEA Inferred from Electronic Annotation more info
enables transition metal ion binding	IDA Inferred from Direct Assay more info	PubMed

Process	Evidence Code	Pubs
involved_in branching morphogenesis of an epithelial tube	IEA Inferred from Electronic Annotation more info
involved_in cell division	IEA Inferred from Electronic Annotation more info
involved_in cell-cell adhesion	IEA Inferred from Electronic Annotation more info
involved_in chromatin remodeling	IEA Inferred from Electronic Annotation more info
involved_in circadian regulation of gene expression	ISS Inferred from Sequence or Structural Similarity more info
involved_in dephosphorylation	IDA Inferred from Direct Assay more info	PubMed
involved_in entrainment of circadian clock by photoperiod	ISS Inferred from Sequence or Structural Similarity more info
involved_in glycogen metabolic process	IEA Inferred from Electronic Annotation more info
involved_in lung development	IEA Inferred from Electronic Annotation more info
involved_in positive regulation of extrinsic apoptotic signaling pathway in absence of ligand	IEA Inferred from Electronic Annotation more info
involved_in positive regulation of glycogen biosynthetic process	IEA Inferred from Electronic Annotation more info
acts_upstream_of_or_within protein dephosphorylation	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in protein dephosphorylation	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in regulation of canonical Wnt signaling pathway	IC Inferred by Curator more info	PubMed
involved_in regulation of circadian rhythm	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in regulation of glycogen catabolic process	IEA Inferred from Electronic Annotation more info
involved_in regulation of transcription by RNA polymerase II	IEA Inferred from Electronic Annotation more info
involved_in regulation of translational initiation in response to stress	ISS Inferred from Sequence or Structural Similarity more info
involved_in response to lead ion	ISS Inferred from Sequence or Structural Similarity more info
involved_in telomere maintenance in response to DNA damage	IDA Inferred from Direct Assay more info	PubMed

Component	Evidence Code	Pubs
part_of PTW/PP1 phosphatase complex	IDA Inferred from Direct Assay more info	PubMed
located_in adherens junction	IDA Inferred from Direct Assay more info	PubMed
colocalizes_with chromosome, telomeric region	IDA Inferred from Direct Assay more info	PubMed
is_active_in cytoplasm	IBA Inferred from Biological aspect of Ancestor more info
located_in cytoplasm	IDA Inferred from Direct Assay more info	PubMed
located_in cytosol	IDA Inferred from Direct Assay more info
located_in cytosol	TAS Traceable Author Statement more info
located_in dendritic spine	IEA Inferred from Electronic Annotation more info
located_in extracellular exosome	HDA more info	PubMed
located_in glutamatergic synapse	IEA Inferred from Electronic Annotation more info
located_in glycogen granule	IEA Inferred from Electronic Annotation more info
located_in nucleolus	IEA Inferred from Electronic Annotation more info
located_in nucleoplasm	IDA Inferred from Direct Assay more info
located_in nucleus	HDA more info	PubMed
is_active_in nucleus	IBA Inferred from Biological aspect of Ancestor more info
located_in nucleus	IDA Inferred from Direct Assay more info	PubMed
located_in perikaryon	IEA Inferred from Electronic Annotation more info
located_in plasma membrane	IDA Inferred from Direct Assay more info
located_in presynapse	IEA Inferred from Electronic Annotation more info
part_of protein phosphatase type 1 complex	IDA Inferred from Direct Assay more info	PubMed

General protein information

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Preferred Names: serine/threonine-protein phosphatase PP1-alpha catalytic subunit

Names: protein phosphatase 1, catalytic subunit, alpha isozyme; serine/threonine protein phosphatase PP1-alpha 1 catalytic subunit; testicular tissue protein Li 155

NP_001008709.1

EC 3.1.3.16

NP_002699.1

EC 3.1.3.16

NP_996756.1

EC 3.1.3.16

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

mRNA and Protein(s)

NM_001008709.2 → NP_001008709.1 serine/threonine-protein phosphatase PP1-alpha catalytic subunit isoform 3

See identical proteins and their annotated locations for NP_001008709.1

Status: REVIEWED

Description

Transcript Variant: This variant (3, also called PP-1 alpha 2) uses an alternate in-frame splice site at the 5' end of an exon compared to variant 1. The resulting isoform (3) has the same N- and C-termini but is longer compared to isoform 1.

Source sequence(s)

AL557336, BC001888, S57501

Consensus CDS

CCDS31618.1

UniProtKB/TrEMBL

A0A140VJS9, A0A7I2V4F7

Related

ENSP00000326031.7, ENST00000312989.11

Conserved Domains (2) summary

PTZ00480
Location:6 → 319

PTZ00480; serine/threonine-protein phosphatase; Provisional

cd07414
Location:8 → 309

MPP_PP1_PPKL; PP1, PPKL (PP1 and kelch-like) enzymes, and related proteins, metallophosphatase domain
NM_002708.4 → NP_002699.1 serine/threonine-protein phosphatase PP1-alpha catalytic subunit isoform 1

See identical proteins and their annotated locations for NP_002699.1

Status: REVIEWED

Description

Transcript Variant: This variant (1) represents the predominant transcript and encodes isoform 1.

Source sequence(s)

BC001888, BC008010, BE793459

Consensus CDS

CCDS8160.1

UniProtKB/Swiss-Prot

A6NNR3, B2R908, P08129, P20653, P22802, P62136, Q07161

UniProtKB/TrEMBL

E9PMD7

Related

ENSP00000365936.4, ENST00000376745.9

Conserved Domains (1) summary

cd07414
Location:8 → 298

MPP_PP1_PPKL; PP1, PPKL (PP1 and kelch-like) enzymes, and related proteins, metallophosphatase domain
NM_206873.2 → NP_996756.1 serine/threonine-protein phosphatase PP1-alpha catalytic subunit isoform 2

See identical proteins and their annotated locations for NP_996756.1

Status: REVIEWED

Description

Transcript Variant: This variant (2) lacks an in-frame coding exon compared to variant 1. The resulting isoform (2) lacks an internal region, as compared to isoform 1.

Source sequence(s)

BC008010, BE278068, BG480286, BM799599

Consensus CDS

CCDS8161.1

UniProtKB/TrEMBL

E9PMD7

Related

ENSP00000350974.4, ENST00000358239.8

Conserved Domains (1) summary

cd07414
Location:19 → 254

MPP_PP1_PPKL; PP1, PPKL (PP1 and kelch-like) enzymes, and related proteins, metallophosphatase domain