Abstract
Sequence-specific 1H NMR assignments are presented for a non-selfcomplementary 23-base-pair DNA duplex of molecular weight 15,000 daltons, containing the OR3 repressor binding site of bacteriophage λ as the central core. The NMR techniques used were mainly phase-sensitive two-dimensional NOE and 2Q spectroscopy, the latter to overcome overlap problems within the spectral region of the deoxyribose spin-systems. Direct sequential NOE connectivities are observed between adenine 2H and deoxyribose 1′ protons. We propose the use of these connectivities as a check of the assignments of C1′ and A2 protons, which have independently been derived via other assignment pathways.
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Abbreviations
- COSY:
-
2-dimensional correlated spectroscopy
- NOESY:
-
2-dimensional nuclear-Overhauser-enhancement spectroscopy
- RELAYED-COSY:
-
2-dimensional relayed coherence transfer spectroscopy
- 2Q:
-
two-quantum
- ppm:
-
parts per million
- 23-bp DNA:
-
d-(ATCTATCACCGCAAGGGATAAAT) · d-(ATTTATCCCTTGCGGTGATAGAT)
- 17-bp DNA (OR3):
-
d-(TATCACCGCAAGGGATA) · d-(TATCCCTTGCGGTGATA)
- di(X;Y):
-
intra-residue distance between protons X and Y
- ds(X;Y):
-
sequential distance between protons X and Y located in sequentially neighbouring nucleotides, where the direction from X to Y is always from 5′ to 3′
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Grütter, R., Otting, G., Wüthrich, K. et al. OR3 operator of bacteriophage λ in a 23 base-pair DNA fragment: Sequence-specific 1H NMR assignments for the non-labile protons and comparison with the isolated 17 base-pair operator. Eur Biophys J 16, 279–286 (1988). https://doi.org/10.1007/BF00254064
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DOI: https://doi.org/10.1007/BF00254064