Native de novo structural determinations of non-canonical nucleic acid motifs by X-ray crystallography at long wavelengths.
Native de novo structural determinations of non-canonical nucleic acid motifs by X-ray crystallography at long wavelengths.
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通过长波长 X 射线晶体学对非规范核酸基序进行天然从头结构测定
DOI:
10.1093/nar/gkaa439
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发表时间:
2020-09-25
影响因子:
14.9
通讯作者:
Wei D
中科院分区:
文献类型:
--
作者:
Zhang Y;El Omari K;Duman R;Liu S;Haider S;Wagner A;Parkinson GN;Wei D
Obtaining phase information remains a formidable challenge for nucleic acid structure determination. The introduction of an X-ray synchrotron beamline designed to be tunable to long wavelengths at Diamond Light Source has opened the possibility to native de novo structure determinations by the use of intrinsic scattering elements. This provides opportunities to overcome the limitations of introducing modifying nucleotides, often required to derive phasing information. In this paper, we build on established methods to generate new tools for nucleic acid structure determinations. We report on the use of (i) native intrinsic potassium single-wavelength anomalous dispersion methods (K-SAD), (ii) use of anomalous scattering elements integral to the crystallization buffer (extrinsic cobalt and intrinsic potassium ions), (iii) extrinsic bromine and intrinsic phosphorus SAD to solve complex nucleic acid structures. Using the reported methods we solved the structures of (i) Pseudorabies virus (PRV) RNA G-quadruplex and ligand complex, (ii) PRV DNA G-quadruplex, and (iii) an i-motif of human telomeric sequence. Our results highlight the utility of using intrinsic scattering as a pathway to solve and determine non-canonical nucleic acid motifs and reveal the variability of topology, influence of ligand binding, and glycosidic angle rearrangements seen between RNA and DNA G-quadruplexes of the same sequence.
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影响因子:
14.9
作者:
Cang X;Šponer J;Cheatham TE 3rd
通讯作者:
Cheatham TE 3rd
DOI:
10.1002/anie.201806482
发表时间:
2019-01-28
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
作者:
Neubacher S;Hennig S
通讯作者:
Hennig S
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
15
作者:
Chu, Betty;Zhang, Daoning;Paukstelis, Paul J.
通讯作者:
Paukstelis, Paul J.
影响因子:
14.9
作者:
Kuryavyi V;Phan AT;Patel DJ
通讯作者:
Patel DJ