IDENTIFICATION OF TERTIARY BASE PAIR RESONANCES IN THE NUCLEAR MAGNETIC-RESONANCE SPECTRA OF TRANSFER RIBONUCLEIC-ACID

被引：40

作者：

REID, BR

MCCOLLUM, L

RIBEIRO, NS

ABBATE, J

HURD, RE

机构：

[1] Biochemistry Department, University of California, Riverside

来源：

BIOCHEMISTRY | 1979年 / 18卷 / 18期

关键词：

D O I：

10.1021/bi00585a024

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The low-field hydrogen-bond ring NH proton nuclear magnetic resonance (NMR) spectra of several transfer ribonucleic acids (tRNAs) related to yeast tRNAPhe have been examined in detail. Several resonances are sensitive to magnesium ion and temperature, suggesting that they are derived from tertiary base pairs. These same resonances cannot be attributed to cloverleaf base pairs as shown by experimental assignment and ring current shift calculation of the secondary base pair resonances. The crystal structure of yeast tRNAPhe reveals at least six tertiary base pairs involving ring NH hydrogen bonds, which we conclude are responsible for the extra resonances observed in the low-field NMR spectrum. In several tRNAs with the same tertiary folding potential and dihydrouridine helix sequence as yeast tRNAPhe, the extra resonances from tertiary base pairs are observed at the same position in the spectrum. © 1979, American Chemical Society. All rights reserved.

引用

页码：3996 / 4005

页数：10

共 42 条

[1] RING CURRENT SHIELDING EFFECTS IN NUCLEIC-ACID DOUBLE HELICES [J].