Polyribonucleotide nucleotidyltransferase - P05055 (PNP_ECOLI)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P05055: 4
 
Function
Involved in mRNA degradation. Catalyzes the phosphorolysis of single-stranded polyribonucleotides processively in the 3'- to 5'-direction. Also involved, along with RNase II, in tRNA processing. RNases II and R contribute to rRNA degradation during starvation, while RNase R and PNPase are the major contributors to quality control of rRNA during steady state growth (PubMed:21135037). UniProt
Catalytic Activity
phosphate + RNAn+1 = a ribonucleoside 5'-diphosphate + RNAn UniProt
Pathway Maps
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Subunit Structure
Component of the RNA degradosome, which is a multiprotein complex involved in RNA processing and mRNA degradation. Interacts with RNase E (rne). Homotrimer. The homotrimer forms a ring-like structure with a central channel, where RNA molecules can bind. RNA molecules bind between neighboring subunits. UniProt
Domain
The S1 motif domain is important for trimerization and RNA-binding. UniProt
  • Other Gene names: pnp, b3164, JW5851
This protein in other organisms (by gene name):
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Data origin/color codes
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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 Protein disorder predictions are based on JRONN (Troshin, P. and Barton, G. J. unpublished), a Java implementation of RONN  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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Validation Track

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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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