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UniProtKB - P36873 (PP1G_HUMAN)

UniProt

P36873 - PP1G_HUMAN

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Protein

Serine/threonine-protein phosphatase PP1-gamma catalytic subunit

Gene

PPP1CC

Organism
Homo sapiens (Human)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

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. Dephosphorylates RPS6KB1. 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. In balance with CSNK1D and CSNK1E, determines the circadian period length, through the regulation of the speed and rhythmicity of PER1 and PER2 phosphorylation. May dephosphorylate CSNK1D and CSNK1E. Dephosphorylates the 'Ser-418' residue of FOXP3 in regulatory T-cells (Treg) from patients with rheumatoid arthritis, thereby inactivating FOXP3 and rendering Treg cells functionally defective (PubMed:23396208).4 Publications

Catalytic activityi

[a protein]-serine/threonine phosphate + H2O = [a protein]-serine/threonine + phosphate.1 Publication

Cofactori

Mn2+2 PublicationsNote: Binds 2 manganese ions per subunit.2 Publications

Enzyme regulationi

Inactivated by binding to URI1. The phosphatase activity of the PPP1R15A-PP1 complex toward EIF2S1 is specifically inhibited by Salubrinal, a drug that protects cells from endoplasmic reticulum stress.2 Publications

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi64 – 641Manganese 12 Publications
Metal bindingi66 – 661Manganese 12 Publications
Metal bindingi92 – 921Manganese 12 Publications
Metal bindingi92 – 921Manganese 22 Publications
Metal bindingi124 – 1241Manganese 22 Publications
Active sitei125 – 1251Proton donor1 Publication
Metal bindingi173 – 1731Manganese 22 Publications
Metal bindingi248 – 2481Manganese 22 Publications
Sitei273 – 2731Inhibition by microcystin toxin binding

GO - Molecular functioni

  • metal ion binding Source: UniProtKB-KW
  • phosphatase activity Source: UniProtKB
  • phosphoprotein phosphatase activity Source: Reactome
  • poly(A) RNA binding Source: UniProtKB
  • protein kinase binding Source: UniProtKB
  • protein N-terminus binding Source: MGI
  • protein serine/threonine phosphatase activity Source: UniProtKB

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Hydrolase, Protein phosphatase

Keywords - Biological processi

Biological rhythms, Carbohydrate metabolism, Cell cycle, Cell division, Glycogen metabolism

Keywords - Ligandi

Manganese, Metal-binding

Enzyme and pathway databases

BRENDAi3.1.3.16. 2681.
ReactomeiR-HSA-163560. Hormone-sensitive lipase (HSL)-mediated triacylglycerol hydrolysis.
R-HSA-2173788. Downregulation of TGF-beta receptor signaling.
R-HSA-2467813. Separation of Sister Chromatids.
R-HSA-2500257. Resolution of Sister Chromatid Cohesion.
R-HSA-400253. Circadian Clock.
R-HSA-5663220. RHO GTPases Activate Formins.
R-HSA-68877. Mitotic Prometaphase.
SignaLinkiP36873.
SIGNORiP36873.

Names & Taxonomyi

Protein namesi
Recommended name:
Serine/threonine-protein phosphatase PP1-gamma catalytic subunit (EC:3.1.3.16)
Short name:
PP-1G
Alternative name(s):
Protein phosphatase 1C catalytic subunit
Gene namesi
Name:PPP1CC
OrganismiHomo sapiens (Human)
Taxonomic identifieri9606 [NCBI]
Taxonomic lineageiEukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo
Proteomesi
  • UP000005640 Componenti: Chromosome 12

Organism-specific databases

HGNCiHGNC:9283. PPP1CC.

Subcellular locationi

  • Cytoplasm
  • Nucleus
  • Nucleus › nucleolus
  • Nucleus › nucleoplasm
  • Nucleus speckle
  • Chromosome › centromere › kinetochore
  • Cleavage furrow
  • Midbody
  • Mitochondrion

    • Note: Colocalizes with SPZ1 in the nucleus (By similarity). Colocalizes with URI1 at mitochondrion. Rapidly exchanges between the nucleolar, nucleoplasmic and cytoplasmic compartments. Highly mobile in cells and can be relocalized through interaction with targeting subunits. In the presence of PPP1R8 relocalizes from the nucleolus to nuclear speckles. Shows a dynamic targeting to specific sites throughout the cell cycle. Highly concentrated in nucleoli of interphase cells and localizes at kinetochores early in mitosis. Relocalization to chromosome-containing regions occurs at the transition from early to late anaphase. Also accumulates at the cleavage furrow and midbody by telophase.By similarity

GO - Cellular componenti

  • cleavage furrow Source: UniProtKB-SubCell
  • condensed chromosome kinetochore Source: UniProtKB-SubCell
  • cytoplasm Source: UniProtKB
  • cytosol Source: Reactome
  • dendritic spine Source: Ensembl
  • focal adhesion Source: UniProtKB
  • midbody Source: UniProtKB-SubCell
  • mitochondrial outer membrane Source: Ensembl
  • mitochondrion Source: UniProtKB
  • MLL5-L complex Source: UniProtKB
  • nuclear speck Source: UniProtKB-SubCell
  • nucleolus Source: UniProtKB
  • nucleus Source: UniProtKB
  • protein complex Source: UniProtKB
  • PTW/PP1 phosphatase complex Source: UniProtKB
Complete GO annotation...

Keywords - Cellular componenti

Centromere, Chromosome, Cytoplasm, Kinetochore, Mitochondrion, Nucleus

Pathology & Biotechi

Mutagenesis

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Mutagenesisi125 – 1251H → A: Loss of activity. 1 Publication
Mutagenesisi273 – 2731C → A, S or L: Abolishes interaction with microcystin toxin. 1 Publication

Organism-specific databases

PharmGKBiPA33611.

Chemistry

ChEMBLiCHEMBL4438.

Polymorphism and mutation databases

BioMutaiPPP1CC.
DMDMi548573.

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Initiator methionineiRemovedCombined sources2 Publications
Chaini2 – 323322Serine/threonine-protein phosphatase PP1-gamma catalytic subunitPRO_0000058787Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Modified residuei2 – 21N-acetylalanineCombined sources2 Publications
Modified residuei307 – 3071PhosphothreonineCombined sources
Modified residuei311 – 3111PhosphothreonineCombined sources

Post-translational modificationi

Phosphorylated by NEK2.1 Publication

Keywords - PTMi

Acetylation, Disulfide bond, Phosphoprotein

Proteomic databases

EPDiP36873.
MaxQBiP36873.
PaxDbiP36873.
PeptideAtlasiP36873.
PRIDEiP36873.
TopDownProteomicsiP36873-1. [P36873-1]
P36873-2. [P36873-2]

PTM databases

DEPODiP36873.
iPTMnetiP36873.
PhosphoSiteiP36873.
SwissPalmiP36873.

Expressioni

Inductioni

Up-regulated in synovial fluid mononuclear cells and peripheral blood mononuclear cells from patients with rheumatoid arthritis.1 Publication

Gene expression databases

BgeeiENSG00000186298.
CleanExiHS_PPP1CC.
ExpressionAtlasiP36873. baseline and differential.
GenevisibleiP36873. HS.

Organism-specific databases

HPAiCAB022645.
HPA013661.

Interactioni

Subunit structurei

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 cyanobacterial toxin microcystin; disulfide-linked. Interacts with PPP1R3B and PPP1R7. Isoform gamma-2 interacts with SPZ1 (By similarity). Component of the MLL5-L complex, at least composed of KMT2E/MLL5, STK38, PPP1CA, PPP1CB, PPP1CC, HCFC1, ACTB and OGT. Interacts with CDCA2. PPP1R15A and PPP1R15B mediate binding to EIF2S1. Part of a complex containing PPP1R15B, PP1 and NCK1/2. Interacts with IKFZ1; the interaction targets PPP1CC to pericentromeric heterochromatin, dephosphorylates IKAROS, stabilizes it and prevents it from degradation. Interacts with PPP1R42; the interaction is direct (By similarity). Interacts with NOM1 and PPP1R8. Component of the PTW/PP1 phosphatase complex, composed of PPP1R10/PNUTS, TOX4, WDR82, and PPP1CA or PPP1CB or PPP1CC. Interacts with PPP1R8. Interacts with isoform 1 and isoform 4 NEK2. Interacts with URI1; the interaction is phosphorylation-dependent and occurs in a growth factor-dependent manner. Interacts with FOXP3. Interacts with TMEM225 (via RVxF motif) (By similarity).By similarity15 Publications

Binary interactionsi

WithEntry#Exp.IntActNotes
A1DRY32EBI-3964623,EBI-4311408
BRCA1P383982EBI-356283,EBI-349905
CD2BP2O954003EBI-356283,EBI-768015
ClockO087852EBI-356283,EBI-79859From a different organism.
CSRNP1Q96S653EBI-356283,EBI-4311573
CSRNP2Q9H1753EBI-356283,EBI-5235958
PPP1R2P412365EBI-356283,EBI-1056517
PPP1R32Q7Z5V64EBI-3964623,EBI-4311771
RANBP9Q96S593EBI-3964623,EBI-636085
TCTEX1D4Q5JR983EBI-3964623,EBI-4311709
TP53P046372EBI-356289,EBI-366083
TP53BP2Q136256EBI-356283,EBI-77642
TP53BP2Q13625-33EBI-356283,EBI-10175039
URI1O947637EBI-356283,EBI-357067
ZFYVE9O954055EBI-356283,EBI-296817

GO - Molecular functioni

  • protein kinase binding Source: UniProtKB
  • protein N-terminus binding Source: MGI

Protein-protein interaction databases

BioGridi111495. 292 interactions.
DIPiDIP-749N.
IntActiP36873. 197 interactions.
MINTiMINT-190765.
STRINGi9606.ENSP00000335084.

Chemistry

BindingDBiP36873.

Structurei

Secondary structure

1
323
Legend: HelixTurnBeta strand
Show more details
Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Helixi9 – 179Combined sources
Turni18 – 214Combined sources
Helixi32 – 4817Combined sources
Beta strandi51 – 555Combined sources
Beta strandi57 – 626Combined sources
Helixi69 – 7911Combined sources
Beta strandi87 – 893Combined sources
Beta strandi94 – 985Combined sources
Helixi100 – 11314Combined sources
Turni115 – 1173Combined sources
Beta strandi118 – 1203Combined sources
Helixi128 – 1314Combined sources
Turni132 – 1354Combined sources
Helixi136 – 1438Combined sources
Helixi146 – 15611Combined sources
Beta strandi162 – 1654Combined sources
Turni166 – 1683Combined sources
Beta strandi169 – 1746Combined sources
Helixi183 – 1875Combined sources
Beta strandi197 – 1993Combined sources
Helixi200 – 2067Combined sources
Beta strandi214 – 2185Combined sources
Beta strandi222 – 2276Combined sources
Helixi229 – 23810Combined sources
Beta strandi242 – 2465Combined sources
Beta strandi254 – 2585Combined sources
Turni259 – 2624Combined sources
Beta strandi263 – 2675Combined sources
Helixi272 – 2743Combined sources
Beta strandi280 – 2856Combined sources
Beta strandi291 – 2966Combined sources

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
EntryMethodResolution (Å)ChainPositionsPDBsum
1IT6X-ray2.00A/B1-323[»]
1JK7X-ray1.90A1-323[»]
1U32X-ray2.00A6-298[»]
2BCDX-ray2.10A1-323[»]
2BDXX-ray2.30A1-323[»]
4UT2X-ray1.96A/B1-323[»]
4UT3X-ray2.19A/B1-323[»]
ProteinModelPortaliP36873.
SMRiP36873. Positions 7-300.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP36873.

Family & Domainsi

Sequence similaritiesi

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

Phylogenomic databases

eggNOGiENOG410IN85. Eukaryota.
ENOG410XPVF. LUCA.
GeneTreeiENSGT00530000062911.
HOGENOMiHOG000172697.
HOVERGENiHBG000216.
InParanoidiP36873.
KOiK06269.
OMAiIQRLLEX.
OrthoDBiEOG091G0EKF.
PhylomeDBiP36873.
TreeFamiTF354243.

Family and domain databases

Gene3Di3.60.21.10. 1 hit.
InterProiIPR004843. Calcineurin-like_PHP_apaH.
IPR029052. Metallo-depent_PP-like.
IPR006186. Ser/Thr-sp_prot-phosphatase.
IPR031675. STPPase_N.
[Graphical view]
PfamiPF00149. Metallophos. 1 hit.
PF16891. STPPase_N. 1 hit.
[Graphical view]
PRINTSiPR00114. STPHPHTASE.
SMARTiSM00156. PP2Ac. 1 hit.
[Graphical view]
SUPFAMiSSF56300. SSF56300. 1 hit.
PROSITEiPS00125. SER_THR_PHOSPHATASE. 1 hit.
[Graphical view]

Sequences (2)i

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

This entry describes 2 isoformsi produced by alternative splicing. AlignAdd to basket

Isoform Gamma-1 (identifier: P36873-1) [UniParc]FASTAAdd to basket

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide

        10         20         30         40         50
MADLDKLNID SIIQRLLEVR GSKPGKNVQL QENEIRGLCL KSREIFLSQP 
        60         70         80         90        100
ILLELEAPLK ICGDIHGQYY DLLRLFEYGG FPPESNYLFL GDYVDRGKQS 
       110        120        130        140        150
LETICLLLAY KIKYPENFFL LRGNHECASI NRIYGFYDEC KRRYNIKLWK 
       160        170        180        190        200
TFTDCFNCLP IAAIVDEKIF CCHGGLSPDL QSMEQIRRIM RPTDVPDQGL 
       210        220        230        240        250
LCDLLWSDPD KDVLGWGEND RGVSFTFGAE VVAKFLHKHD LDLICRAHQV 
       260        270        280        290        300
VEDGYEFFAK RQLVTLFSAP NYCGEFDNAG AMMSVDETLM CSFQILKPAE 
       310        320 
KKKPNATRPV TPPRGMITKQ AKK
Length:323
Mass (Da):36,984
Last modified:June 1, 1994 - v1
Checksum:i0EEEF0E842188536
GO
Isoform Gamma-2 (identifier: P36873-2) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     315-323: GMITKQAKK → VASGLNPSIQKASNYRNNTVLYE

Show »
Length:337
Mass (Da):38,518
Checksum:i9731E5A6C8EEBF46
GO

Natural variant

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Natural varianti152 – 1521F → S.
Corresponds to variant rs11558237 [ dbSNP | Ensembl ].		VAR_051734

Alternative sequence

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Alternative sequencei315 – 3239GMITKQAKK → VASGLNPSIQKASNYRNNTV LYE in isoform Gamma-2. 1 PublicationVSP_005094

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X74008 mRNA. Translation: CAA52169.1.
BC014073 mRNA. Translation: AAH14073.1.
L07395 mRNA. Translation: AAA19823.1.
CCDSiCCDS58279.1. [P36873-2]
CCDS9150.1. [P36873-1]
PIRiS35699.
S35700.
RefSeqiNP_001231903.1. NM_001244974.1. [P36873-2]
NP_002701.1. NM_002710.3. [P36873-1]
UniGeneiHs.79081.

Genome annotation databases

EnsembliENST00000335007; ENSP00000335084; ENSG00000186298. [P36873-1]
ENST00000340766; ENSP00000341779; ENSG00000186298. [P36873-2]
GeneIDi5501.
KEGGihsa:5501.
UCSCiuc001tru.4. human. [P36873-1]

Keywords - Coding sequence diversityi

Alternative splicing, Polymorphism

Cross-referencesi

Web resourcesi

Protein Spotlight

The things we forget - Issue 32 of March 2003

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X74008 mRNA. Translation: CAA52169.1.
BC014073 mRNA. Translation: AAH14073.1.
L07395 mRNA. Translation: AAA19823.1.
CCDSiCCDS58279.1. [P36873-2]
CCDS9150.1. [P36873-1]
PIRiS35699.
S35700.
RefSeqiNP_001231903.1. NM_001244974.1. [P36873-2]
NP_002701.1. NM_002710.3. [P36873-1]
UniGeneiHs.79081.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
EntryMethodResolution (Å)ChainPositionsPDBsum
1IT6X-ray2.00A/B1-323[»]
1JK7X-ray1.90A1-323[»]
1U32X-ray2.00A6-298[»]
2BCDX-ray2.10A1-323[»]
2BDXX-ray2.30A1-323[»]
4UT2X-ray1.96A/B1-323[»]
4UT3X-ray2.19A/B1-323[»]
ProteinModelPortaliP36873.
SMRiP36873. Positions 7-300.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

BioGridi111495. 292 interactions.
DIPiDIP-749N.
IntActiP36873. 197 interactions.
MINTiMINT-190765.
STRINGi9606.ENSP00000335084.

Chemistry

BindingDBiP36873.
ChEMBLiCHEMBL4438.

PTM databases

DEPODiP36873.
iPTMnetiP36873.
PhosphoSiteiP36873.
SwissPalmiP36873.

Polymorphism and mutation databases

BioMutaiPPP1CC.
DMDMi548573.

Proteomic databases

EPDiP36873.
MaxQBiP36873.
PaxDbiP36873.
PeptideAtlasiP36873.
PRIDEiP36873.
TopDownProteomicsiP36873-1. [P36873-1]
P36873-2. [P36873-2]

Protocols and materials databases

DNASUi5501.
Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsembliENST00000335007; ENSP00000335084; ENSG00000186298. [P36873-1]
ENST00000340766; ENSP00000341779; ENSG00000186298. [P36873-2]
GeneIDi5501.
KEGGihsa:5501.
UCSCiuc001tru.4. human. [P36873-1]

Organism-specific databases

CTDi5501.
GeneCardsiPPP1CC.
HGNCiHGNC:9283. PPP1CC.
HPAiCAB022645.
HPA013661.
MIMi176914. gene.
neXtProtiNX_P36873.
PharmGKBiPA33611.
GenAtlasiSearch...

Phylogenomic databases

eggNOGiENOG410IN85. Eukaryota.
ENOG410XPVF. LUCA.
GeneTreeiENSGT00530000062911.
HOGENOMiHOG000172697.
HOVERGENiHBG000216.
InParanoidiP36873.
KOiK06269.
OMAiIQRLLEX.
OrthoDBiEOG091G0EKF.
PhylomeDBiP36873.
TreeFamiTF354243.

Enzyme and pathway databases

BRENDAi3.1.3.16. 2681.
ReactomeiR-HSA-163560. Hormone-sensitive lipase (HSL)-mediated triacylglycerol hydrolysis.
R-HSA-2173788. Downregulation of TGF-beta receptor signaling.
R-HSA-2467813. Separation of Sister Chromatids.
R-HSA-2500257. Resolution of Sister Chromatid Cohesion.
R-HSA-400253. Circadian Clock.
R-HSA-5663220. RHO GTPases Activate Formins.
R-HSA-68877. Mitotic Prometaphase.
SignaLinkiP36873.
SIGNORiP36873.

Miscellaneous databases

ChiTaRSiPPP1CC. human.
EvolutionaryTraceiP36873.
GeneWikiiPPP1CC.
GenomeRNAii5501.
PROiP36873.
SOURCEiSearch...

Gene expression databases

BgeeiENSG00000186298.
CleanExiHS_PPP1CC.
ExpressionAtlasiP36873. baseline and differential.
GenevisibleiP36873. HS.

Family and domain databases

Gene3Di3.60.21.10. 1 hit.
InterProiIPR004843. Calcineurin-like_PHP_apaH.
IPR029052. Metallo-depent_PP-like.
IPR006186. Ser/Thr-sp_prot-phosphatase.
IPR031675. STPPase_N.
[Graphical view]
PfamiPF00149. Metallophos. 1 hit.
PF16891. STPPase_N. 1 hit.
[Graphical view]
PRINTSiPR00114. STPHPHTASE.
SMARTiSM00156. PP2Ac. 1 hit.
[Graphical view]
SUPFAMiSSF56300. SSF56300. 1 hit.
PROSITEiPS00125. SER_THR_PHOSPHATASE. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiPP1G_HUMAN
AccessioniPrimary (citable) accession number: P36873
Entry historyi
Integrated into UniProtKB/Swiss-Prot: June 1, 1994
Last sequence update: June 1, 1994
Last modified: September 7, 2016
This is version 196 of the entry and version 1 of the sequence. [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

Miscellaneous

Microcystin toxin is bound to Cys-273 through a thioether bond.

Keywords - Technical termi

3D-structure, Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. Human chromosome 12
    Human chromosome 12: entries, gene names and cross-references to MIM
  2. Human entries with polymorphisms or disease mutations
    List of human entries with polymorphisms or disease mutations
  3. Human polymorphisms and disease mutations
    Index of human polymorphisms and disease mutations
  4. MIM cross-references
    Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
  5. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  6. Protein Spotlight
    Protein Spotlight articles and cited UniProtKB/Swiss-Prot entries
  7. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.