Macromolecule Content

• Total Structure Weight: 5554.44 
• Atom Count: 366 
• Residue Count: 17 
• Unique nucleic acid chains: 1

1FL8

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

• DOI: 10.2210/pdb1FL8/pdb
• NDB: 1FL8

• Classification: RNA


• Deposited: 2000-08-11 Released: 2000-10-16 
• Deposition Author(s): Sundaram, M., Durant, P.C., Davis, D.R.

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Experimental Data Snapshot

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

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: 11027137 


• 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. 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.

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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
Molecule	Chains	Length	Organism
ANTICODON DOMAIN OF TRNA(LYS)	A	17	N/A

Small Molecules

Modified Residues  3 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PSU	A	RNA LINKING	C9 H13 N2 O9 P		U
U8U	A	RNA LINKING	C11 H18 N3 O8 P S		U
T6A	A	RNA LINKING	C15 H21 N6 O11 P		A

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-08-11 
• Released Date: 2000-10-16 
• Deposition Author(s): Sundaram, M., Durant, P.C., Davis, D.R.

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