Single-stranded DNA-binding protein DdrB - Q9RY80 (DDRB_DEIRA)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q9RY80: 2
ssDNA-binding protein that contributes to the ionizing radiation resistance of D.radiodurans. Plays a role in DNA repair and genome reconstitution in a RecA-independent process. Required for recovery from severe genomic fragmentation as a result of exposure to severe levels of ionizing radiation. Binds ssDNA but not dsDNA. Stimulates annealing of complementary ssDNA. Does not complement an ssb disruption. UniProt
Pathway Maps
      ESCHER  BiGG
Subunit Structure
Homopentamer arranged in a ring-structure; DNA binds between subunits and along the top of the ring. The pentamers self-associate to coat ssDNA in higher-ordered structures; oligomerization facilitates the assembly of extended nucleoprotein complexes. Self-assembly does not however require ssDNA-binding. Interacts with SSB. UniProt
Contains a novel ssDNA-binding fold, which is structurally and topologically distinct from the OB-fold universally found in standard SSB proteins. The disordered C-terminus of DdrB may mediate interactions with other proteins important for DNA damage recovery. UniProt
  • Other Gene names: ddrB, DR_0070
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 Protein disorder predictions are based on JRONN (Troshin, P. and Barton, G. J. unpublished), a Java implementation of RONN  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 SBKB   and the Protein Model Portal  
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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