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Protein

Serine/threonine-protein phosphatase 2A catalytic subunit beta isoform

Gene

PPP2CB

Organism
Homo sapiens (Human)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

PP2A can modulate the activity of phosphorylase B kinase casein kinase 2, mitogen-stimulated S6 kinase, and MAP-2 kinase.1 Publication

Catalytic activityi

[a protein]-serine/threonine phosphate + H2O = [a protein]-serine/threonine + phosphate.

Cofactori

Mn2+By similarityNote: Binds 2 manganese ions per subunit.By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi57Manganese 1By similarity1
Metal bindingi59Manganese 1By similarity1
Metal bindingi85Manganese 1By similarity1
Metal bindingi85Manganese 2By similarity1
Metal bindingi117Manganese 2By similarity1
Active sitei118Proton donorBy similarity1
Metal bindingi167Manganese 2By similarity1
Metal bindingi241Manganese 2By similarity1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionHydrolase, Protein phosphatase
LigandManganese, Metal-binding

Enzyme and pathway databases

ReactomeiR-HSA-113501 Inhibition of replication initiation of damaged DNA by RB1/E2F1
R-HSA-1295596 Spry regulation of FGF signaling
R-HSA-141444 Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal
R-HSA-163685 Integration of energy metabolism
R-HSA-163767 PP2A-mediated dephosphorylation of key metabolic factors
R-HSA-180024 DARPP-32 events
R-HSA-195253 Degradation of beta-catenin by the destruction complex
R-HSA-196299 Beta-catenin phosphorylation cascade
R-HSA-198753 ERK/MAPK targets
R-HSA-202670 ERKs are inactivated
R-HSA-2465910 MASTL Facilitates Mitotic Progression
R-HSA-2467813 Separation of Sister Chromatids
R-HSA-2500257 Resolution of Sister Chromatid Cohesion
R-HSA-389513 CTLA4 inhibitory signaling
R-HSA-432142 Platelet sensitization by LDL
R-HSA-4641262 Disassembly of the destruction complex and recruitment of AXIN to the membrane
R-HSA-5339716 Misspliced GSK3beta mutants stabilize beta-catenin
R-HSA-5358747 S33 mutants of beta-catenin aren't phosphorylated
R-HSA-5358749 S37 mutants of beta-catenin aren't phosphorylated
R-HSA-5358751 S45 mutants of beta-catenin aren't phosphorylated
R-HSA-5358752 T41 mutants of beta-catenin aren't phosphorylated
R-HSA-5467337 APC truncation mutants have impaired AXIN binding
R-HSA-5467340 AXIN missense mutants destabilize the destruction complex
R-HSA-5467348 Truncations of AMER1 destabilize the destruction complex
R-HSA-5663220 RHO GTPases Activate Formins
R-HSA-5673000 RAF activation
R-HSA-5675221 Negative regulation of MAPK pathway
R-HSA-6804757 Regulation of TP53 Degradation
R-HSA-6811558 PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling
R-HSA-68877 Mitotic Prometaphase
R-HSA-69231 Cyclin D associated events in G1
R-HSA-69273 Cyclin A/B1/B2 associated events during G2/M transition
R-HSA-70171 Glycolysis
SIGNORiP62714

Names & Taxonomyi

Protein namesi
Recommended name:
Serine/threonine-protein phosphatase 2A catalytic subunit beta isoform (EC:3.1.3.16)
Short name:
PP2A-beta
Gene namesi
Name:PPP2CB
OrganismiHomo sapiens (Human)
Taxonomic identifieri9606 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo
Proteomesi
  • UP000005640 Componenti: Chromosome 8

Organism-specific databases

EuPathDBiHostDB:ENSG00000104695.12
HGNCiHGNC:9300 PPP2CB
MIMi176916 gene
neXtProtiNX_P62714

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte; Source: COMPARTMENTS

Keywords - Cellular componenti

Centromere, Chromosome, Cytoplasm, Cytoskeleton, Nucleus

Pathology & Biotechi

Organism-specific databases

DisGeNETi5516
OpenTargetsiENSG00000104695
PharmGKBiPA33664

Chemistry databases

DrugBankiDB00163 Vitamin E

Polymorphism and mutation databases

BioMutaiPPP2CB
DMDMi50402236

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00000588451 – 309Serine/threonine-protein phosphatase 2A catalytic subunit beta isoformAdd BLAST309

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei307PhosphotyrosineBy similarity1
Modified residuei309Leucine methyl ester1 Publication1

Post-translational modificationi

Reversibly methyl esterified on Leu-309 by leucine carboxyl methyltransferase 1 (LCMT1) and protein phosphatase methylesterase 1 (PPME1). Carboxyl methylation influences the affinity of the catalytic subunit for the different regulatory subunits, thereby modulating the PP2A holoenzyme's substrate specificity, enzyme activity and cellular localization.1 Publication
Phosphorylation of either threonine (by autophosphorylation-activated protein kinase) or tyrosine results in inactivation of the phosphatase. Auto-dephosphorylation has been suggested as a mechanism for reactivation.
May be monoubiquitinated by NOSIP.By similarity

Keywords - PTMi

Methylation, Phosphoprotein, Ubl conjugation

Proteomic databases

EPDiP62714
MaxQBiP62714
PaxDbiP62714
PeptideAtlasiP62714
PRIDEiP62714

2D gel databases

OGPiP62714
REPRODUCTION-2DPAGEiIPI00429689

PTM databases

DEPODiP62714
iPTMnetiP62714
PhosphoSitePlusiP62714
SwissPalmiP62714

Expressioni

Gene expression databases

BgeeiENSG00000104695
CleanExiHS_PPP2CB
ExpressionAtlasiP62714 baseline and differential
GenevisibleiP62714 HS

Organism-specific databases

HPAiCAB018600
HPA043236

Interactioni

Subunit structurei

Found in a complex with at least ARL2, PPP2CB, PPP2R1A, PPP2R2A, PPP2R5E and TBCD. Interacts with TBCD (By similarity). PP2A consists of a common heterodimeric core enzyme (composed of a 36 kDa catalytic subunit (subunit C) and a 65 kDa constant regulatory subunit (PR65) (subunit A)) that associates with a variety of regulatory subunits. Proteins that associate with the core dimer include three families of regulatory subunits B (the R2/B/PR55/B55, R3/B''/PR72/PR130/PR59 and R5/B'/B56 families), the 48 kDa variable regulatory subunit, viral proteins, and cell signaling molecules. Binds PPME1. May indirectly interact with SGO1, most probably through regulatory B56 subunits. Interacts with CTTNBP2NL. Interacts with PTPA (PubMed:12952889).By similarity5 Publications

Binary interactionsi

Show more details

GO - Molecular functioni

Protein-protein interaction databases

BioGridi111508, 154 interactors
CORUMiP62714
DIPiDIP-42325N
IntActiP62714, 142 interactors
MINTiP62714
STRINGi9606.ENSP00000221138

Structurei

3D structure databases

ProteinModelPortaliP62714
SMRiP62714
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the PPP phosphatase family. PP-1 subfamily.Curated

Phylogenomic databases

eggNOGiKOG0371 Eukaryota
COG0639 LUCA
GeneTreeiENSGT00550000074618
HOGENOMiHOG000172696
HOVERGENiHBG000216
InParanoidiP62714
KOiK04382
OMAiNWGHDKN
OrthoDBiEOG091G0B6S
PhylomeDBiP62714
TreeFamiTF105559

Family and domain databases

Gene3Di3.60.21.10, 1 hit
InterProiView protein in InterPro
IPR004843 Calcineurin-like_PHP_ApaH
IPR029052 Metallo-depent_PP-like
IPR006186 Ser/Thr-sp_prot-phosphatase
PfamiView protein in Pfam
PF00149 Metallophos, 1 hit
PRINTSiPR00114 STPHPHTASE
SMARTiView protein in SMART
SM00156 PP2Ac, 1 hit
PROSITEiView protein in PROSITE
PS00125 SER_THR_PHOSPHATASE, 1 hit

Sequencei

Sequence statusi: Complete.

P62714-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MDDKAFTKEL DQWVEQLNEC KQLNENQVRT LCEKAKEILT KESNVQEVRC
60 70 80 90 100
PVTVCGDVHG QFHDLMELFR IGGKSPDTNY LFMGDYVDRG YYSVETVTLL
110 120 130 140 150
VALKVRYPER ITILRGNHES RQITQVYGFY DECLRKYGNA NVWKYFTDLF
160 170 180 190 200
DYLPLTALVD GQIFCLHGGL SPSIDTLDHI RALDRLQEVP HEGPMCDLLW
210 220 230 240 250
SDPDDRGGWG ISPRGAGYTF GQDISETFNH ANGLTLVSRA HQLVMEGYNW
260 270 280 290 300
CHDRNVVTIF SAPNYCYRCG NQAAIMELDD TLKYSFLQFD PAPRRGEPHV

TRRTPDYFL
Length:309
Mass (Da):35,575
Last modified:July 19, 2004 - v1
Checksum:i51DA9EB0633FC191
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti19E → D in AAB38020 (PubMed:2837763).Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X12656 mRNA Translation: CAA31183.1
CR541747 mRNA Translation: CAG46547.1
J03805 mRNA Translation: AAB38020.1
CH471080 Genomic DNA Translation: EAW63434.1
CH471080 Genomic DNA Translation: EAW63435.1
CH471080 Genomic DNA Translation: EAW63436.1
BC012022 mRNA Translation: AAH12022.1
M60484 Genomic DNA Translation: AAA36467.1
CCDSiCCDS6079.1
PIRiB37135 PAHU2B
RefSeqiNP_001009552.1, NM_001009552.1
UniGeneiHs.491440

Genome annotation databases

EnsembliENST00000221138; ENSP00000221138; ENSG00000104695
GeneIDi5516
KEGGihsa:5516
UCSCiuc003xik.4 human

Similar proteinsi

Entry informationi

Entry nameiPP2AB_HUMAN
AccessioniPrimary (citable) accession number: P62714
Secondary accession number(s): D3DSV4, P11082, Q6FHK5
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 19, 2004
Last sequence update: July 19, 2004
Last modified: March 28, 2018
This is version 147 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

Miscellaneousi

Keywords - Technical termi

Complete proteome, Direct protein sequencing, Reference proteome
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Main funding by: National Institutes of Health