ISSN:
1573-5001
Schlagwort(e):
DNA
;
DNA–protein complex
;
Deoxythymidylate kinase
;
Enzymatic synthesis
;
Heteronuclear NMR
;
Isotope labeling
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
,
Chemie und Pharmazie
Notizen:
Abstract The power of heteronuclear NMR spectroscopy to study macromoleculesand their complexes has been amply demonstrated over the last decade. Theobstacle to routinely applying these techniques to the study of DNA has beenthe synthesis of 13C,15N-labeled DNA. Here wepresent a simple and efficient method to generate isotope-labeled DNA forNMR studies that is as easy as that for isotope labeling of RNA. The methodwas used to synthesize a uniformly13 C,15N-labeled 32-nucleotide DNA that binds tohuman basic fibroblast growth factor with high affinity and specificity.Isotope-edited experiments were applied to the13 C,15N-labeled DNA bound to unlabeled protein,and the 13 C,15N-labeled DNA was also examined incomplex with 15N-labeled protein. The NMR experiments showthat the DNA adopts a well-defined stable structure when bound to theprotein, and illustrate the potential of13 C,15N-labeled DNA for structural studies ofDNA–protein complexes.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1018358602001
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