1FL8

HYPERMODIFIED NUCLEOSIDES IN THE ANTICODON OF TRNALYS STABILIZE A CANONICAL U-TURN STRUCTURE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 35 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Hypermodified nucleosides in the anticodon of tRNALys stabilize a canonical U-turn structure.

Sundaram, M.Durant, P.C.Davis, D.R.

(2000) Biochemistry 39: 12575-12584


  • PubMed Abstract: 
  • Modified nucleosides in the anticodon domain of Escherichia coli tRNA(Lys) are necessary for high-affinity codon recognition and reading frame maintenance. Human tRNA(Lys,3) is the specific primer for HIV-1 reverse transcriptase and also requires nuc ...

    Modified nucleosides in the anticodon domain of Escherichia coli tRNA(Lys) are necessary for high-affinity codon recognition and reading frame maintenance. Human tRNA(Lys,3) is the specific primer for HIV-1 reverse transcriptase and also requires nucleoside modification for proper function. We now present NMR solution structures for the fully modified 17-nucleotide E. coli tRNA(Lys) anticodon stem-loop domain (ASL). NMR data were also collected for several partially modified ASLs, revealing the contributions each modified nucleoside (mnm(5)s(2)U34, t(6)A37, and psi39) makes in transforming the disordered, unmodified tRNA ASL into the highly ordered native structure. The solution structure of the native ASL domain provides insight into longstanding questions regarding both wobble position modification and the nearly ubiquitous t(6)A37 found in tRNAs with an adjacent U at position 36. Native tRNA(Lys) has a U-turn structure similar to the yeast tRNA(Phe) crystal structure, unlike previously proposed "unconventional" anticodon structures characterized by stable interactions between mnm(5)s(2)U-34 and t(6)A-37.


    Organizational Affiliation

    Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
ANTICODON DOMAIN OF TRNA(LYS)A17N/A
Small Molecules
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
PSU
Query on PSU
A
RNA LINKINGC9 H13 N2 O9 PU
U8U
Query on U8U
A
RNA LINKINGC11 H18 N3 O8 P SU
T6A
Query on T6A
A
RNA LINKINGC15 H21 N6 O11 PA
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 35 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-10-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance