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    PTPA protein phosphatase 2 phosphatase activator [ Homo sapiens (human) ]

    Gene ID: 5524, updated on 8-Aug-2021

    Summary

    Official Symbol
    PTPAprovided by HGNC
    Official Full Name
    protein phosphatase 2 phosphatase activatorprovided by HGNC
    Primary source
    HGNC:HGNC:9308
    See related
    Ensembl:ENSG00000119383 MIM:600756
    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
    PP2A; PR53; PPP2R4
    Summary
    Protein phosphatase 2A is one of the four major Ser/Thr phosphatases and is implicated in the negative control of cell growth and division. Protein phosphatase 2A holoenzymes are heterotrimeric proteins composed of a structural subunit A, a catalytic subunit C, and a regulatory subunit B. The regulatory subunit is encoded by a diverse set of genes that have been grouped into the B/PR55, B'/PR61, and B''/PR72 families. These different regulatory subunits confer distinct enzymatic specificities and intracellular localizations to the holozenzyme. The product of this gene belongs to the B' family. This gene encodes a specific phosphotyrosyl phosphatase activator of the dimeric form of protein phosphatase 2A. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]
    Expression
    Ubiquitous expression in testis (RPKM 35.1), brain (RPKM 26.2) and 25 other tissues See more
    Orthologs
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    Genomic context

    See PTPA in Genome Data Viewer
    Location:
    9q34.11
    Exon count:
    13
    Annotation release Status Assembly Chr Location
    109.20210514 current GRCh38.p13 (GCF_000001405.39) 9 NC_000009.12 (129110949..129148946)
    105.20201022 previous assembly GRCh37.p13 (GCF_000001405.25) 9 NC_000009.11 (131873229..131911225)

    Chromosome 9 - NC_000009.12Genomic Context describing neighboring genes Neighboring gene dolichyldiphosphatase 1 Neighboring gene carnitine O-acetyltransferase Neighboring gene Sharpr-MPRA regulatory region 8657 Neighboring gene Sharpr-MPRA regulatory region 13939 Neighboring gene immediate early response 5 like Neighboring gene Sharpr-MPRA regulatory region 2152

    Genomic regions, transcripts, and products

    Expression

    • 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

    GeneRIFs: Gene References Into Functions

    What's a GeneRIF?

    Phenotypes

    Associated conditions

    Description Tests
    An atlas of genetic influences on human blood metabolites.
    GeneReviews: Not available
    Genome-wide association study of HLA-DQB1*06:02 negative essential hypersomnia.
    GeneReviews: Not available

    HIV-1 interactions

    Protein interactions

    Protein Gene Interaction Pubs
    Tat tat HIV-1 Tat upregulates the total levels of PP2A protein and downregulates the inactive form of phosphorylated PP2A, which leads to inhibit hTERT activity directly or indirectly in CD4+ 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 An increase in the amount of PP2A core enzyme with a concomitant decrease in the amount of PP2A holoenzyme inhibits HIV-1 Tat-stimulated transcription from the HIV-1 LTR promoter, indicating a role for PP2A in the modulation of HIV-1 gene expression PubMed
    Vpr vpr Amino-acid peptide sequence (residues 77-92) of HIV-1 Vpr binds to PP2A1. The sequence from HIV-1 89.6 strain is a cell penetrating and death domain PubMed
    vpr HIV-1 Vpr cell death causing peptide (amino acid residues 71-96) can activate the expression of PP2A when applied extracellularly to CD4+ T cells as well as cause the activation of PP2A from brain, liver, and adipose tissues PubMed
    vpr HIV-1 Vpr was found to upregulate PP2A in fission yeast PubMed
    vpr HIV-1 Vpr forms a complex with HIV-1 nucleocapsid that directly activates PP2A PubMed
    nucleocapsid gag HIV-1 Vpr forms a complex with HIV-1 nucleocapsid that directly activates PP2A PubMed

    Go to the HIV-1, Human Interaction Database

    Pathways from PubChem

    Interactions

    Products Interactant Other Gene Complex Source Pubs Description

    General gene information

    Markers

    Homology

    Clone Names

    • MGC2184

    Gene Ontology Provided by GOA

    Component Evidence Code Pubs
    part_of calcium channel complex IDA
    Inferred from Direct Assay
    more info
    PubMed 
    is_active_in cytoplasm IBA
    Inferred from Biological aspect of Ancestor
    more info
    PubMed 
    located_in cytoplasm IDA
    Inferred from Direct Assay
    more info
    PubMed 
    located_in extracellular exosome HDA PubMed 
    located_in nucleoplasm IDA
    Inferred from Direct Assay
    more info
     
    is_active_in nucleus IBA
    Inferred from Biological aspect of Ancestor
    more info
    PubMed 
    located_in nucleus IDA
    Inferred from Direct Assay
    more info
    PubMed 
    part_of protein phosphatase type 2A complex IBA
    Inferred from Biological aspect of Ancestor
    more info
    PubMed 
    part_of protein phosphatase type 2A complex IDA
    Inferred from Direct Assay
    more info
    PubMed 

    General protein information

    Preferred Names
    serine/threonine-protein phosphatase 2A activator
    Names
    PP2A phosphatase activator
    phosphotyrosyl phosphatase activator
    protein phosphatase 2 regulatory subunit 4
    protein phosphatase 2A activator, regulatory subunit 4
    protein phosphatase 2A regulatory subunit 4
    protein phosphatase 2A, regulatory subunit B' (PR 53)
    serine/threonine-protein phosphatase 2A regulatory subunit B'
    NP_001180326.1
    NP_001258761.1
    NP_066954.2
    NP_821067.1
    NP_821068.1
    NP_821070.1
    XP_011517136.1
    XP_011517137.1
    XP_011517138.1
    XP_011517139.1
    XP_011517140.1
    XP_016870377.1

    NCBI Reference Sequences (RefSeq)

    NEW Try the new Transcript table

    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.

    Genomic

    1. NG_029370.1 RefSeqGene

      Range
      5002..42998
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    mRNA and Protein(s)

    1. NM_001193397.2NP_001180326.1  serine/threonine-protein phosphatase 2A activator isoform e

      Status: REVIEWED

      Description
      Transcript Variant: This variant (6) contains a different first exon, which results in the use of an in-frame downstream start codon, and lacks an alternate coding segment, compared to variant 1. The resulting protein (isoform e) is shorter when compared to isoform a.
      Source sequence(s)
      AL158151, CD630703, DA052599, X73478
      Consensus CDS
      CCDS75917.1
      UniProtKB/Swiss-Prot
      Q15257
      UniProtKB/TrEMBL
      F6WIT2
      Related
      ENSP00000394338.3, ENST00000452489.6
      Conserved Domains (1) summary
      pfam03095
      Location:1282
      PTPA; Phosphotyrosyl phosphate activator (PTPA) protein
    2. NM_001271832.2NP_001258761.1  serine/threonine-protein phosphatase 2A activator isoform f

      See identical proteins and their annotated locations for NP_001258761.1

      Status: REVIEWED

      Description
      Transcript Variant: This variant (7) lacks two consecutive exons in the coding region, compared to variant 1. The resulting isoform (f) lacks an internal segment, compared to isoform a.
      Source sequence(s)
      AL158151
      Consensus CDS
      CCDS65156.1
      UniProtKB/Swiss-Prot
      Q15257
      Related
      ENSP00000349726.4, ENST00000357197.8
      Conserved Domains (1) summary
      pfam03095
      Location:26288
      PTPA; Phosphotyrosyl phosphate activator (PTPA) protein
    3. NM_021131.5NP_066954.2  serine/threonine-protein phosphatase 2A activator isoform b

      See identical proteins and their annotated locations for NP_066954.2

      Status: REVIEWED

      Description
      Transcript Variant: This variant (3) differs in the 5' UTR and lacks an in-frame segment of the coding region, compared to variant 1. Variants 2 and 3 encode a shorter protein (isoform b), also known as isoform alpha, that is missing an internal segment compared to isoform a.
      Source sequence(s)
      AL158151, BC002545, DB009663, X73478
      Consensus CDS
      CCDS6920.1
      UniProtKB/Swiss-Prot
      Q15257
      Related
      ENSP00000351885.5, ENST00000358994.9
      Conserved Domains (1) summary
      pfam03095
      Location:26317
      PTPA; Phosphotyrosyl phosphate activator (PTPA) protein
    4. NM_178000.3NP_821067.1  serine/threonine-protein phosphatase 2A activator isoform b

      See identical proteins and their annotated locations for NP_821067.1

      Status: REVIEWED

      Description
      Transcript Variant: This variant (2) lacks one of the coding exons compared to transcript variant 1. It maintains the reading frame and encodes a protein (isoform b), also known as isoform alpha, that is missing an internal segment of the protein compared to isoform a. Variants 2 and 3 encode the same isoform.
      Source sequence(s)
      AL158151
      Consensus CDS
      CCDS6920.1
      UniProtKB/Swiss-Prot
      Q15257
      Related
      ENSP00000377036.2, ENST00000393370.7
      Conserved Domains (1) summary
      pfam03095
      Location:26317
      PTPA; Phosphotyrosyl phosphate activator (PTPA) protein
    5. NM_178001.3NP_821068.1  serine/threonine-protein phosphatase 2A activator isoform a

      See identical proteins and their annotated locations for NP_821068.1

      Status: REVIEWED

      Description
      Transcript Variant: This variant (1) represents the longest transcript. It encodes the longest protein (isoform a), also known as isoform beta.
      Source sequence(s)
      AL158151
      UniProtKB/Swiss-Prot
      Q15257
      Related
      ENSP00000337448.1, ENST00000337738.6
      Conserved Domains (1) summary
      pfam03095
      Location:26351
      PTPA; Phosphotyrosyl phosphate activator (PTPA) protein
    6. NM_178003.3NP_821070.1  serine/threonine-protein phosphatase 2A activator isoform d

      See identical proteins and their annotated locations for NP_821070.1

      Status: REVIEWED

      Description
      Transcript Variant: This variant (5) lacks an in-frame segment of the coding region, compared to variant 1. It encodes a shorter protein (isoform d), also known as isoform epsilon, that is missing an internal segment compared to isoform a.
      Source sequence(s)
      AL158151
      UniProtKB/Swiss-Prot
      Q15257
      Related
      ENSP00000347109.3, ENST00000355007.7
      Conserved Domains (1) summary
      pfam03095
      Location:26275
      PTPA; Phosphotyrosyl phosphate activator (PTPA) protein

    RefSeqs of Annotated Genomes: Homo sapiens Updated Annotation Release 109.20210514

    The following sections contain reference sequences that belong to a specific genome build. Explain

    Reference GRCh38.p13 Primary Assembly

    Genomic

    1. NC_000009.12 Reference GRCh38.p13 Primary Assembly

      Range
      129110949..129148946
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    mRNA and Protein(s)

    1. XM_011518836.2XP_011517138.1  serine/threonine-protein phosphatase 2A activator isoform X3

      Conserved Domains (1) summary
      pfam03095
      Location:76326
      PTPA; Phosphotyrosyl phosphate activator (PTPA) protein
    2. XM_011518834.2XP_011517136.1  serine/threonine-protein phosphatase 2A activator isoform X1

      Conserved Domains (1) summary
      pfam03095
      Location:76355
      PTPA; Phosphotyrosyl phosphate activator (PTPA) protein
    3. XM_011518838.2XP_011517140.1  serine/threonine-protein phosphatase 2A activator isoform X5

      Conserved Domains (1) summary
      pfam03095
      Location:76337
      PTPA; Phosphotyrosyl phosphate activator (PTPA) protein
    4. XM_011518837.2XP_011517139.1  serine/threonine-protein phosphatase 2A activator isoform X4

      See identical proteins and their annotated locations for XP_011517139.1

      UniProtKB/TrEMBL
      B4DZF8
      Conserved Domains (1) summary
      pfam03095
      Location:26333
      PTPA; Phosphotyrosyl phosphate activator (PTPA) protein
    5. XM_011518835.2XP_011517137.1  serine/threonine-protein phosphatase 2A activator isoform X2

      Conserved Domains (1) summary
      pfam03095
      Location:26340
      PTPA; Phosphotyrosyl phosphate activator (PTPA) protein
    6. XM_017014888.2XP_016870377.1  serine/threonine-protein phosphatase 2A activator isoform X6

    Suppressed Reference Sequence(s)

    The following Reference Sequences have been suppressed. Explain

    1. NM_178002.1: Suppressed sequence

      Description
      NM_178002.1: This RefSeq was permanently suppressed because currently there is insufficient support for this transcript variant and PMID:10880964 indicates that the encoded isoform may not be functional.
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