Double-stranded RNA-binding protein 1 - O04492 (DRB1_ARATH)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for O04492: 5
Double-stranded RNA-binding protein involved in RNA-mediated post-transcriptional gene silencing (PTGS). Functions in the microRNAs (miRNAs) biogenesis by assisting DICER-LIKE 1 (DCL1) in the accurate processing from primary miRNAs (pri-miRNAs) to miRNAs in the nucleus. Forms a complex with SERRATE (SE) and DCL1 to promote accurate processing of pri-miRNAs by DCL1. Binds and assist DCL1 for accurate processing of precursor miRNAs (pre-miRNA). Indirectly involved in the production of trans-acting small interfering RNAs (ta-siRNAs) derived from the TAS1, TAS2 or TAS3 endogenous transcripts by participating in the production of their initiating miRNAs. Involved with argonaute 1 (AGO1) in the guide strand selection from miRNA duplexes, presumably by directional loading of the miRNA duplex (guide stand and passenger strand) onto the RNA-induced silencing complex (RISC) for passenger strand degradation. Does not participate in sense transgene-induced post-transcriptional gene silencing (S-PTGS). Involved in several plant development aspects and response to hormones through its role in miRNAs processing. UniProt
Pathway Maps
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Subunit Structure
Homodimer. Heterodimer with DRB2, DRB4 or DRB5. Interacts with SE and DCL1 (PubMed:15821876, PubMed:16428603, PubMed:16889646, PubMed:20462493). Interacts with RCF3, RS40 and RS41 (PubMed:26227967). UniProt
The dsRNA binding domains (dsRBDs) 1 and 2 are sufficient for the function in miRNA precursors processing and mature miRNA generation. UniProt
  • Organism: Mouse-ear cress
  • Length:
  • UniProt
  • Isoforms: 2 , currently showing only the 'canonical' sequence.
  • Other Gene names: DRB1, HYL1, At1g09700, F21M12.9
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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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