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Structure and folding of a rare, natural kink turn in RNA with an A•A pair at the 2•d2n position

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Structure and folding of a rare, natural kink turn in RNA with an A•A pair at the 2•d2n position. / Schroeder, Kersten T.; Daldrop, Peter; McPhee, Scott A.; Lilley, David M. J.

In: RNA: a Publication of the RNA Society, Vol. 18, No. 6, 06.2012, p. 1257-1266.

Research output: Contribution to journalArticle

Harvard

Schroeder, KT, Daldrop, P, McPhee, SA & Lilley, DMJ 2012, 'Structure and folding of a rare, natural kink turn in RNA with an A•A pair at the 2•d2n position' RNA: a Publication of the RNA Society, vol 18, no. 6, pp. 1257-1266., 10.1261/rna.032409.112

APA

Schroeder, K. T., Daldrop, P., McPhee, S. A., & Lilley, D. M. J. (2012). Structure and folding of a rare, natural kink turn in RNA with an A•A pair at the 2•d2n position. RNA: a Publication of the RNA Society, 18(6), 1257-1266. 10.1261/rna.032409.112

Vancouver

Schroeder KT, Daldrop P, McPhee SA, Lilley DMJ. Structure and folding of a rare, natural kink turn in RNA with an A•A pair at the 2•d2n position. RNA: a Publication of the RNA Society. 2012 Jun;18(6):1257-1266. Available from: 10.1261/rna.032409.112

Author

Schroeder, Kersten T.; Daldrop, Peter; McPhee, Scott A.; Lilley, David M. J. / Structure and folding of a rare, natural kink turn in RNA with an A•A pair at the 2•d2n position.

In: RNA: a Publication of the RNA Society, Vol. 18, No. 6, 06.2012, p. 1257-1266.

Research output: Contribution to journalArticle

Bibtex - Download

@article{50f42e292a414f69aa7c63cc16d0142c,
title = "Structure and folding of a rare, natural kink turn in RNA with an A•A pair at the 2•d2n position",
author = "Schroeder, {Kersten T.} and Peter Daldrop and McPhee, {Scott A.} and Lilley, {David M. J.}",
year = "2012",
doi = "10.1261/rna.032409.112",
volume = "18",
number = "6",
pages = "1257--1266",
journal = "RNA: a Publication of the RNA Society",
issn = "1355-8382",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Structure and folding of a rare, natural kink turn in RNA with an A•A pair at the 2•d2n position

A1 - Schroeder,Kersten T.

A1 - Daldrop,Peter

A1 - McPhee,Scott A.

A1 - Lilley,David M. J.

AU - Schroeder,Kersten T.

AU - Daldrop,Peter

AU - McPhee,Scott A.

AU - Lilley,David M. J.

PY - 2012/6

Y1 - 2012/6

N2 - The kink turn (k-turn) is a frequently occurring motif, comprising a bulge followed by G•A and A•G pairs that introduces a sharp axial bend in duplex RNA. Natural k-turn sequences exhibit significant departures from the consensus, including the A•G pairs that form critical interactions stabilizing the core of the structure. Kt-23 found in the small ribosomal subunit differs from the consensus in many organisms, particularly in the second AdG pair distal to the bulge (2b•2n). Analysis of many Kt-23 sequences shows that the frequency of occurrence at the 2n position (i.e., on the nonbulged strand, normally G in standard k-turns) is U>C>G>A. Less than 1% of sequences have A at the 2n position, but one such example occurs in Thelohania solenopsae Kt-23. This sequence folds only weakly in the presence of Mg ions but is induced to fold normally by the binding of L7Ae protein. Introduction of this sequence into the SAM-I riboswitch resulted in normal binding of SAM ligand, indicating that tertiary RNA contacts have resulted in k-turn folding. X-ray crystallography shows that the T. solenopsae Kt-23 adopts a standard k-turn geometry, making the key, conserved hydrogen bonds in the core and orienting the 1n (of the bulge-proximal A•G pair) and 2b adenine nucleobases in position facing the opposing minor groove. The 2b and 2n adenine nucleobases are not directly hydrogen bonded, but each makes hydrogen bonds to their opposing strands. Published by Cold Spring Harbor Laboratory Press. Copyright © 2012 RNA Society.

AB - The kink turn (k-turn) is a frequently occurring motif, comprising a bulge followed by G•A and A•G pairs that introduces a sharp axial bend in duplex RNA. Natural k-turn sequences exhibit significant departures from the consensus, including the A•G pairs that form critical interactions stabilizing the core of the structure. Kt-23 found in the small ribosomal subunit differs from the consensus in many organisms, particularly in the second AdG pair distal to the bulge (2b•2n). Analysis of many Kt-23 sequences shows that the frequency of occurrence at the 2n position (i.e., on the nonbulged strand, normally G in standard k-turns) is U>C>G>A. Less than 1% of sequences have A at the 2n position, but one such example occurs in Thelohania solenopsae Kt-23. This sequence folds only weakly in the presence of Mg ions but is induced to fold normally by the binding of L7Ae protein. Introduction of this sequence into the SAM-I riboswitch resulted in normal binding of SAM ligand, indicating that tertiary RNA contacts have resulted in k-turn folding. X-ray crystallography shows that the T. solenopsae Kt-23 adopts a standard k-turn geometry, making the key, conserved hydrogen bonds in the core and orienting the 1n (of the bulge-proximal A•G pair) and 2b adenine nucleobases in position facing the opposing minor groove. The 2b and 2n adenine nucleobases are not directly hydrogen bonded, but each makes hydrogen bonds to their opposing strands. Published by Cold Spring Harbor Laboratory Press. Copyright © 2012 RNA Society.

UR - http://www.scopus.com/inward/record.url?scp=84861387352&partnerID=8YFLogxK

U2 - 10.1261/rna.032409.112

DO - 10.1261/rna.032409.112

M1 - Article

JO - RNA: a Publication of the RNA Society

JF - RNA: a Publication of the RNA Society

SN - 1355-8382

IS - 6

VL - 18

SP - 1257

EP - 1266

ER -

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