Site-specific isotope labeling of long RNA for structural and mechanistic studies.
Site-specific isotope labeling of long RNA for structural and mechanistic studies.
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DOI:
10.1093/nar/gkr951
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发表时间:
2012-01
影响因子:
14.9
通讯作者:
Tanaka Y
中科院分区:
文献类型:
--
作者:
Kawahara I;Haruta K;Ashihara Y;Yamanaka D;Kuriyama M;Toki N;Kondo Y;Teruya K;Ishikawa J;Furuta H;Ikawa Y;Kojima C;Tanaka Y
A site-specific isotope labeling technique of long RNA molecules was established. This technique is comprised of two simple enzymatic reactions, namely a guanosine transfer reaction of group I self-splicing introns and a ligation with T4 DNA ligase. The trans-acting group I self-splicing intron with its external cofactor, ‘isotopically labeled guanosine 5′-monophosphate’ (5′-GMP), steadily gave a 5′-residue-labeled RNA fragment. This key reaction, in combination with a ligation of 5′-remainder non-labeled sequence, allowed us to prepare a site-specifically labeled RNA molecule in a high yield, and its production was confirmed with 15N NMR spectroscopy. Such a site-specifically labeled RNA molecule can be used to detect a molecular interaction and to probe chemical features of catalytically/structurally important residues with NMR spectroscopy and possibly Raman spectroscopy and mass spectrometry.
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