2UWM

C-TERMINAL DOMAIN(WH2-WH4) OF ELONGATION FACTOR SELB IN COMPLEX WITH SECIS RNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis for Dynamic Interdomain Movement and RNA Recognition of the Selenocysteine-Specific Elongation Factor Selb.

Ose, T.Soler, N.Rasubala, L.Kuroki, K.Kohda, D.Fourmy, D.Yoshizawa, S.Maenaka, K.

(2007) Structure 15: 577

  • DOI: 10.1016/j.str.2007.03.007

  • PubMed Abstract: 
  • Selenocysteine (Sec) is the "21st" amino acid and is genetically encoded by an unusual incorporation system. The stop codon UGA becomes a Sec codon when the selenocysteine insertion sequence (SECIS) exists downstream of UGA. Sec incorporation require ...

    Selenocysteine (Sec) is the "21st" amino acid and is genetically encoded by an unusual incorporation system. The stop codon UGA becomes a Sec codon when the selenocysteine insertion sequence (SECIS) exists downstream of UGA. Sec incorporation requires a specific elongation factor, SelB, which recognizes tRNA(Sec) via use of an EF-Tu-like domain and the SECIS mRNA hairpin via use of a C-terminal domain (SelB-C). SelB functions in multiple translational steps: binding to SECIS mRNA and tRNA(Sec), delivery of tRNA(Sec) onto an A site, GTP hydrolysis, and release from tRNA and mRNA. However, this dynamic mechanism remains to be revealed. Here, we report a large domain rearrangement in the structure of SelB-C complexed with RNA. Surprisingly, the interdomain region forms new interactions with the phosphate backbone of a neighboring RNA, distinct from SECIS RNA binding. This SelB-RNA interaction is sequence independent, possibly reflecting SelB-tRNA/-rRNA recognitions. Based on these data, the dynamic SelB-ribosome-mRNA-tRNA interactions will be discussed.


    Organizational Affiliation

    Division of Structural Biology, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, Fukuoka 812-8582, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SELENOCYSTEINE-SPECIFIC ELONGATION FACTOR
A, B
258Moorella thermoacetica (strain ATCC 39073)N/A
Find proteins for Q2RFK4 (Moorella thermoacetica (strain ATCC 39073))
Go to UniProtKB:  Q2RFK4
Entity ID: 2
MoleculeChainsLengthOrganism
5'-R(*GP*GP*CP*GP*UP*UP*GP*CP*CP*GP *GP*UP*CP*UP*GP*GP*CP*AP*AP*CP*GP*CP*C)-3'C,D23Moorella thermoacetica
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.200 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 160.074α = 90.00
b = 119.843β = 100.05
c = 50.461γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-05-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance