5'-3' exoribonuclease 1 - P22147 (XRN1_YEAST)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P22147: 1
 
Function
Multifunctional protein that exhibits several independent functions at different levels of the cellular processes. 5'-3' exonuclease component of the nonsense-mediated mRNA decay (NMD) which is a highly conserved mRNA degradation pathway, an RNA surveillance system whose role is to identify and rid cells of mRNA with premature termination codons and thus prevents accumulation of potentially harmful truncated proteins. The NMD pathway has a second role regulating the decay of wild-type mRNAs, and especially mRNAs that are important for telomere functions. Participate in CTH2-mediated and VTS1-mediated mRNA turnover. Involved in the degradation of several hypomodified mature tRNA species and participates in the 5'-processing or the degradation of the snoRNA precursors and rRNA processing. Involved in defense against virus and suppresses viral RNA recombination by rapidly removing the 5'-truncated RNAs, the substrates of recombination, and thus reducing the chance for recombination to occur in the parental strain. Required for the assembly of the virus-like particles of the Ty3 retrotransposon and contributes to the efficient generation of narnavirus 20S RNA by playing a major role in the elimination of the non-viral upstream sequences from the primary transcripts. Degrades single-stranded DNA (ss-DNA) and can renature complementary ss-DNA as well as catalyzes the formation of heteroduplex DNA from circular ss-DNA and homologous linear ds-DNA in vitro. Acts as a microtubule-associated protein which interacts with cytoplasmic microtubules through beta-tubulin and promotes in vitro assembly of tubulin into microtubules. Associates with microtubule functions such as chromosome transmission, nuclear migration, and SPB duplication. Has also a role in G1 to S transition and is involved in nuclear fusion during karyogamy. Required for the expression of ROK1 at the post-transcriptional level and for the alpha-factor induction of the karyogamy genes KAR3 and KAR4. Plays a role in filamentous growth. UniProt
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Data in green originates from UniProtKB  
Variation data (sourced from UniProt) shows non-genetic variation from the ExPASy   and dbSNP   websites.
Data in yellow originates from Pfam  , by interacting with the HMMER3 web site  
Data in purple originates from Phosphosite  .
Data in orange originates from the SCOP   (version 1.75) and SCOPe   (version 2.04) classifications.
Data in grey has been calculated using BioJava  . Protein disorder predictions are based on JRONN (Troshin, P. and Barton, G. J. unpublished), a Java implementation of RONN  
  • Red: potentially disorderd region
  • Blue: probably ordered region.
Hydropathy has been calculated using a sliding window of 15 residues and summing up scores from standard hydrophobicity tables.
  • Red: hydrophobic
  • Blue: hydrophilic.
Data in lilac represent the genomic exon structure projected onto the UniProt sequence.
Data in blue originates from PDB
  • Secstruc: Secondary structure projected from representative PDB entries onto the UniProt sequence.
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Data in red indicates combined ranges of Homology Models from the SWISS-MODEL Repository  
The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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