Exosome RNA helicase MTR4 - P42285 (MTREX_HUMAN)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P42285: 6
 
Function
Component of exosome targeting complexes. Subunit of the trimeric nuclear exosome targeting (NEXT) complex, a complex that directs a subset of non-coding short-lived RNAs for exosomal degradation. Subunit of the trimeric poly(A) tail exosome targeting (PAXT) complex, a complex that directs a subset of long and polyadenylated poly(A) RNAs for exosomal degradation. The RNA exosome is fundamental for the degradation of RNA in eukaryotic nuclei. Substrate targeting is facilitated by its cofactor MTREX, which links to RNA-binding protein adapters (PubMed:27871484). Associated with the RNA exosome complex and involved in the 3'-processing of the 7S pre-RNA to the mature 5.8S rRNA (PubMed:17412707, PubMed:29107693). May be involved in pre-mRNA splicing. UniProt
Catalytic Activity
ATP + H2O = ADP + H+ + phosphate UniProt
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Subunit Structure
Component of a TRAMP-like complex, an ATP-dependent exosome regulatory complex consisting of a helicase (MTREX), an oligadenylate polymerase (TENT4B or TENT4A), and a substrate specific RNA-binding factor (ZCCHC7 or ZCCHC8). Several TRAMP-like complexes exist with specific compositions and are associated with nuclear, or nucleolar RNA exosomes (PubMed:26166824). Identified in the spliceosome C complex. Component of the poly(A) tail exosome targeting (PAXT) complex made of PABPN1, ZFC3H1 and MTREX that directs a subset of long and polyadenylated poly(A) RNAs for exosomal degradation (PubMed:27871484). Component of the nuclear exosome targeting (NEXT) complex composed of MTREX, ZCCHC8, and RBM7 that directs a subset of non-coding short-lived RNAs for exosomal degradation (PubMed:27905398, PubMed:27871484). Interacts with ZCCHC8 (PubMed:27905398, PubMed:16263084). Binds to ZFC3H1 and RBM7 in a RNase-insensitive manner (PubMed:27871484). Interacts with EXOSC10; the interaction mediates the association of MTREX with nuclear RNA exosomes (PubMed:26166824). Interacts with isoform 1 of NVL in an ATP-dependent manner; the interaction is required to associate NVL with nuclear RNA exosome (PubMed:16782053, PubMed:26166824, PubMed:11991638, PubMed:16263084, PubMed:21855801, PubMed:27871484, PubMed:27905398). Interacts with WDR74; the interaction dissociation in a late stage of rRNA synthesis is required for appropriate maturation of pre-60S particles and depends on the ATPase activity of NVL (PubMed:26456651, PubMed:29107693). Interacts with MPHOSPH6 (PubMed:17412707). Interacts with the RNA cap-binding complex proteins NCBP1 and SRRT (PubMed:30842217). Interacts with NRDE2; the interaction is direct and negatively regulates MTREX function in exosomal degradation by changing its conformation precluding interaction with ZFC3H1, the RNA cap-binding complex proteins NCBP1 and SRRT, and association with the exosome (PubMed:30842217). 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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