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Nucleic Acids Research, 1977, Vol. 4, No. 11 3969-3980
© 1977

Articles

A novel representation of the conformational structure of transfer RNAs. Correlation of the folding patterns of the polynucleotide chain with the base sequence and the nucleotide backbone torsions*

A. R. Srinivasan and N. Yathindra

Department of Physics (Crystallography and Biophysics), University of Madras Guindy Campus, Madras-600 025, India

Received September 5, 1977.

A novel description of the conformational characteristics of all the individual nucleotides and the phosphodiesters in tRNAs is presented in the form of a circular plot. This representation furnishes information of the base sequence with the folding patterns of the polynucleotide chain as one traverses along the circumference and with the individual nucleotide and phosphodiester linkage torsions along the radii. The circular plot obtained for yeast tRNAPhe strikingly distinguishes the helical and the loop regions. The variation of the different nucleotide torsions along the entire chain length and their effect on the secondary helical and tertiary loop regions become readily apparent.

*Contribution No.464 from the Department of Physics (Crystallography & Biophysics), University of Madras, Madras-600025, India


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