Structural basis for activation of fluorogenic dyes by an RNA aptamer lacking a G-quadruplex motif.
Structural basis for activation of fluorogenic dyes by an RNA aptamer lacking a G-quadruplex motif.
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DOI:
10.1038/s41467-018-06942-3
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发表时间:
2018-10-31
影响因子:
16.6
通讯作者:
Piccirilli JA
中科院分区:
文献类型:
--
作者:
Shelke SA;Shao Y;Laski A;Koirala D;Weissman BP;Fuller JR;Tan X;Constantin TP;Waggoner AS;Bruchez MP;Armitage BA;Piccirilli JA
The DIR2s RNA aptamer, a second-generation, in-vitro selected binder to dimethylindole red (DIR), activates the fluorescence of cyanine dyes, DIR and oxazole thiazole blue (OTB), allowing detection of two well-resolved emission colors. Using Fab BL3-6 and its cognate hairpin as a crystallization module, we solved the crystal structures of both the apo and OTB-SO3 bound forms of DIR2s at 2.0 Å and 1.8 Å resolution, respectively. DIR2s adopts a compact, tuning fork-like architecture comprised of a helix and two short stem-loops oriented in parallel to create the ligand binding site through tertiary interactions. The OTB-SO3 fluorophore binds in a planar conformation to a claw-like structure formed by a purine base-triple, which provides a stacking platform for OTB-SO3, and an unpaired nucleotide, which partially caps the binding site from the top. The absence of a G-quartet or base tetrad makes the DIR2s aptamer unique among fluorogenic RNAs with known 3D structure. The DIR2s RNA aptamer activates the fluorescence of cyanine dyes allowing detection of two well-resolved emission colors. Here authors solve the crystal structures of the apo and OTB-SO3 fluorophore-bound DIR2s and show how the fluorophore ligand is bound.
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DOI:
10.1039/c5cc01526j
发表时间:
2015-05-28
期刊:
Chemical communications (Cambridge, England)
影响因子:
--
作者:
DasGupta S;Shelke SA;Li NS;Piccirilli JA
通讯作者:
Piccirilli JA
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
DOI:
10.1073/pnas.96.11.6131
发表时间:
1999-05-25
影响因子:
11.1
作者:
Grate, D;Wilson, C
通讯作者:
Wilson, C
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH
影响因子:
14.8
作者:
Huang, Hao;Suslov, Nikolai B.;Li, Nan-Sheng;Shelke, Sandip A.;Evans, Molly E.;Koldobskaya, Yelena;Rice, Phoebe A.;Piccirilli, Joseph A.
通讯作者:
Piccirilli, Joseph A.