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Specific modulation of the anti-DNA autoantibody-nucleic acids interaction by the high affinity RNA aptamer.

Authors
Kim, YM; Choi, KH; Jang, YJ; Yu, J; Jeong, S
Citation
Biochemical and biophysical research communications, 300(2):516-523, 2003
Journal Title
Biochemical and biophysical research communications
ISSN
0006-291X1090-2104
Abstract
Anti-DNA autoantibodies are one of the frequently found autoantibodies in systemic lupus erythematosus patient sera. RNA aptamers for the monoclonal G6-9 anti-DNA autoantibody were selected from a random pool of RNA library. Binding affinity of the best aptamer is around 2nM, which is at least 100-fold higher than that of cognate DNA antigen to the autoantibody. Aptamer binds specifically to the G6-9 autoantibody but not to other similar autoantibodies. Minimal binding motif of the aptamer was mapped, providing a hint for a natural epitope of the autoantibody. DNA binding to the G6-9 autoantibody is shown to be efficiently inhibited by the aptamer. Such binding property of the RNA aptamer could be used not only as a modulator for the pathogenic anti-DNA autoantibody, but also as a useful biochemical reagent for elucidating a fine specificity of the autoantibody-nucleic acid interaction.
MeSH terms
Antibodies, Antinuclear/metabolism*Antibodies, Monoclonal/metabolismBase SequenceBinding SitesBinding, CompetitiveDNA/immunology*Molecular Sequence DataOligoribonucleotides/chemistryOligoribonucleotides/metabolism*Protein BindingRNA/chemistryRNA/metabolism*Surface Plasmon Resonance
PMID
12504114
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Microbiology
AJOU Authors
장, 영주
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