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 

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This is version 1.3 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

  • DOI: 10.1021/bi0014655
  • Primary Citation of Related Structures:  
    1FL8

  • 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 nucleoside modification for proper function ...

    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

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Entity ID: 1
MoleculeChainsLengthOrganismImage
ANTICODON DOMAIN OF TRNA(LYS)A 17N/A
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 35 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 1FL8 Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-10-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Data collection, Database references, Derived calculations