GTPase Der - P0A6P5 (DER_ECOLI)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

GTPase that plays an essential role in the late steps of ribosome biogenesis. GTPase point mutations (but not a deletion mutant) are suppressed by mild overexpression of RelA, probably due to increased levels of the stringent response mediator (p)ppGpp. 50S subunits assembled in the absence of Der are defective and unable to assemble into 70S ribosomes. GTPase activity is stimulated by YihI. Overexpression rescues an rrmJ deletion, stabilizing the 70S ribosome. Der and RrmJ are likely to share a mechanism to stabilize 50S ribosomal subunits at a very late stage of 50S subunit maturation possibly by interacting with 23S rRNA or 23S rRNA/r-protein complex. UniProt
Pathway Maps
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Subunit Structure
Associates with the 50S ribosomal subunit in the presence of GMPPNP, a non-hydrolysable GTP analog, and thus probably also in the presence of GTP, but not in the presence of GDP or in the absence of nucleotide. Interacts with YihI via the last 490 residues. UniProt
The 2 G (guanine nucleotide-binding) domains are essential for activity and function cooperatively. The KH-like domain is required for ribosome recognition. UniProt
  • Other Gene names: der, engA, yfgK, b2511, JW5403, Z3774, ECs3373
This protein in other organisms (by gene name):
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  • Secstruc: Secondary structure projected from representative PDB entries onto the UniProt sequence.
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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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