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Protein

Exosome complex component SKI6

Gene

SKI6

Organism
Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

Non-catalytic component of the RNA exosome complex which has 3'->5' exoribonuclease activity and participates in a multitude of cellular RNA processing and degradation events. In the nucleus, the RNA exosome complex is involved in proper maturation of stable RNA species such as rRNA, snRNA and snoRNA, in the elimination of RNA processing by-products and non-coding 'pervasive' transcripts, such as antisense RNA species and cryptic unstable transcripts (CUTs), and of mRNAs with processing defects, thereby limiting or excluding their export to the cytoplasm. In the cytoplasm, the RNA exosome complex is involved in general mRNA turnover and in RNA surveillance pathways, preventing translation of aberrant mRNAs. The catalytic inactive RNA exosome core complex of 9 subunits (Exo-9) is proposed to play a pivotal role in the binding and presentation of RNA for ribonucleolysis, and to serve as a scaffold for the association with catalytic subunits and accessory proteins or complexes. SKI6 is part of the hexameric ring of RNase PH domain-containing subunits proposed to form a central channel which threads RNA substrates for degradation.2 Publications

Miscellaneous

Present with 5150 molecules/cell in log phase SD medium.1 Publication

Caution

Was originally thought to have exonuclease activity but it was later shown (PubMed:17173052 and PubMed:17174896) that only DIS3/RRP44 subunit of the exosome core has this activity.1 Publication

GO - Molecular functioni

GO - Biological processi

  • exonucleolytic trimming to generate mature 3'-end of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) Source: SGD
  • nonfunctional rRNA decay Source: SGD
  • nuclear mRNA surveillance Source: SGD
  • nuclear polyadenylation-dependent CUT catabolic process Source: SGD
  • nuclear polyadenylation-dependent mRNA catabolic process Source: SGD
  • nuclear polyadenylation-dependent tRNA catabolic process Source: SGD
  • nuclear-transcribed mRNA catabolic process, 3'-5' exonucleolytic nonsense-mediated decay Source: SGD
  • nuclear-transcribed mRNA catabolic process, exonucleolytic, 3'-5' Source: SGD
  • nuclear-transcribed mRNA catabolic process, non-stop decay Source: SGD
  • polyadenylation-dependent snoRNA 3'-end processing Source: SGD
  • rRNA catabolic process Source: SGD
  • U1 snRNA 3'-end processing Source: SGD
  • U4 snRNA 3'-end processing Source: SGD
  • U5 snRNA 3'-end processing Source: SGD

Keywordsi

Molecular functionRNA-binding
Biological processrRNA processing

Enzyme and pathway databases

BioCyciYEAST:G3O-30881-MONOMER
ReactomeiR-SCE-429958 mRNA decay by 3' to 5' exoribonuclease
R-SCE-6791226 Major pathway of rRNA processing in the nucleolus and cytosol

Names & Taxonomyi

Protein namesi
Recommended name:
Exosome complex component SKI6
Alternative name(s):
Extracellular mutant protein 20
Ribosomal RNA-processing protein 41
Superkiller protein 6
Gene namesi
Name:SKI6
Synonyms:ECM20, RRP41
Ordered Locus Names:YGR195W
ORF Names:G7587
OrganismiSaccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
Taxonomic identifieri559292 [NCBI]
Taxonomic lineageiEukaryotaFungiDikaryaAscomycotaSaccharomycotinaSaccharomycetesSaccharomycetalesSaccharomycetaceaeSaccharomyces
Proteomesi
  • UP000002311 Componenti: Chromosome VII

Organism-specific databases

EuPathDBiFungiDB:YGR195W
SGDiS000003427 SKI6

Subcellular locationi

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

Keywords - Cellular componenti

Cytoplasm, Exosome, Nucleus

Pathology & Biotechi

Mutagenesis

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Mutagenesisi62 – 63KS → ED: Impairs RNA-binding (at the proposed ring entry site). 1 Publication2
Mutagenesisi95 – 96RR → EE: Impairs RNA-binding (at the proposed ring exit site). 1 Publication2

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001399621 – 246Exosome complex component SKI6Add BLAST246

Proteomic databases

MaxQBiP46948
PaxDbiP46948
PRIDEiP46948
TopDownProteomicsiP46948

Interactioni

Subunit structurei

Component of the RNA exosome complex. Specifically part of the catalytically inactive RNA exosome core (Exo-9) complex which associates with catalytic subunits DIS3 and RRP6 in cytoplasmic- and nuclear-specific RNA exosome complex forms. Exo-9 is formed by a hexameric ring of RNase PH domain-containing subunits and peripheral S1 domain-containing components CSL4, RRP4 and RRP40 located on the top of the ring structure.4 Publications

Binary interactionsi

Show more details

Protein-protein interaction databases

BioGridi33448, 280 interactors
ComplexPortaliCPX-599 Nuclear/nucleolar exosome complex, DIS3-RRP6 variant
CPX-603 Cytoplasmic exosome complex, DIS3 variant
DIPiDIP-2083N
IntActiP46948, 33 interactors
MINTiP46948
STRINGi4932.YGR195W

Structurei

Secondary structure

1246
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Beta strandi14 – 16Combined sources3
Beta strandi25 – 31Combined sources7
Turni33 – 35Combined sources3
Beta strandi37 – 44Combined sources8
Beta strandi47 – 57Combined sources11
Beta strandi60 – 64Combined sources5
Beta strandi67 – 69Combined sources3
Beta strandi71 – 78Combined sources8
Beta strandi82 – 85Combined sources4
Helixi95 – 108Combined sources14
Turni109 – 111Combined sources3
Helixi114 – 116Combined sources3
Beta strandi121 – 130Combined sources10
Helixi135 – 149Combined sources15
Beta strandi154 – 156Combined sources3
Beta strandi158 – 166Combined sources9
Beta strandi169 – 173Combined sources5
Helixi176 – 179Combined sources4
Beta strandi182 – 190Combined sources9
Beta strandi193 – 201Combined sources9
Helixi207 – 209Combined sources3
Helixi210 – 241Combined sources32

3D structure databases

ProteinModelPortaliP46948
SMRiP46948
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP46948

Family & Domainsi

Sequence similaritiesi

Belongs to the RNase PH family.Curated

Phylogenomic databases

GeneTreeiENSGT00550000074804
HOGENOMiHOG000229515
InParanoidiP46948
KOiK11600
OMAiVINCQYS
OrthoDBiEOG092C4S0G

Family and domain databases

Gene3Di3.30.230.70, 1 hit
InterProiView protein in InterPro
IPR001247 ExoRNase_PH_dom1
IPR015847 ExoRNase_PH_dom2
IPR036345 ExoRNase_PH_dom2_sf
IPR027408 PNPase/RNase_PH_dom_sf
IPR020568 Ribosomal_S5_D2-typ_fold
PfamiView protein in Pfam
PF01138 RNase_PH, 1 hit
PF03725 RNase_PH_C, 1 hit
SUPFAMiSSF54211 SSF54211, 1 hit
SSF55666 SSF55666, 1 hit

Sequencei

Sequence statusi: Complete.

P46948-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSRLEIYSPE GLRLDGRRWN ELRRFESSIN THPHAADGSS YMEQGNNKII
60 70 80 90 100
TLVKGPKEPR LKSQMDTSKA LLNVSVNITK FSKFERSKSS HKNERRVLEI
110 120 130 140 150
QTSLVRMFEK NVMLNIYPRT VIDIEIHVLE QDGGIMGSLI NGITLALIDA
160 170 180 190 200
GISMFDYISG ISVGLYDTTP LLDTNSLEEN AMSTVTLGVV GKSEKLSLLL
210 220 230 240
VEDKIPLDRL ENVLAIGIAG AHRVRDLMDE ELRKHAQKRV SNASAR
Length:246
Mass (Da):27,561
Last modified:November 1, 1995 - v1
Checksum:iC80EFFB528A43044
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X82775 Genomic DNA Translation: CAA58018.1
Z72980 Genomic DNA Translation: CAA97221.1
Z72981 Genomic DNA Translation: CAA97223.1
AY558509 Genomic DNA Translation: AAS56835.1
BK006941 Genomic DNA Translation: DAA08288.1
PIRiS59180
RefSeqiNP_011711.3, NM_001181324.3

Genome annotation databases

EnsemblFungiiYGR195W; YGR195W; YGR195W
GeneIDi853109
KEGGisce:YGR195W

Similar proteinsi

Entry informationi

Entry nameiRRP41_YEAST
AccessioniPrimary (citable) accession number: P46948
Secondary accession number(s): D6VUX7
Entry historyiIntegrated into UniProtKB/Swiss-Prot: November 1, 1995
Last sequence update: November 1, 1995
Last modified: July 18, 2018
This is version 167 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programFungal Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families
  3. Yeast
    Yeast (Saccharomyces cerevisiae): entries, gene names and cross-references to SGD
  4. Yeast chromosome VII
    Yeast (Saccharomyces cerevisiae) chromosome VII: entries and gene names

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