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Aptamer structures from A to zeta

J Feigon1, T Dieckmann, F W Smith

  • 1Department of Chemistry and Biochemistry and the Molecular Biology Institute, University of California, Los Angeles, CA 90095-1569, USA. feigon@ewald.mbi.ucla.edu

Chemistry & Biology
|August 1, 1996
PubMed
Summary
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RNA aptamers fold into specific shapes to bind molecules like FMN, ATP, and amino acids. These structures offer new insights into nucleic acid 3D forms and their potential roles in chemical reactions.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Structural Biology

Background:

  • Oligonucleotides can fold into complex three-dimensional structures.
  • RNA aptamers are known to bind specific small molecules.
  • Understanding these interactions is key to molecular recognition.

Purpose of the Study:

  • To determine the solution structures of RNA aptamers targeting FMN, ATP, arginine, and citrulline.
  • To elucidate the structural basis for selective binding of biological cofactors and amino acids by RNA.
  • To gain new insights into the structural diversity and functional potential of nucleic acids.

Main Methods:

  • Nuclear Magnetic Resonance (NMR) spectroscopy was used to determine the solution structures.
  • Computational modeling and structure analysis were employed.

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Main Results:

  • Detailed three-dimensional structures of four distinct RNA aptamers were solved.
  • The structures reveal specific binding pockets formed by folded RNA.
  • These pockets accommodate molecules such as FMN, ATP, arginine, and citrulline with high selectivity.

Conclusions:

  • RNA aptamers can form intricate structures capable of high-affinity, selective molecular recognition.
  • The solved structures validate existing hypotheses and offer novel perspectives on nucleic acid structural biology.
  • These findings highlight the potential of RNA in catalysis and as a versatile molecular tool.