RNA



The crystal structure of yeast phenylalanine tRNA at 1.93 [Angstrom capital A, ring] resolution: A classic structure revisited


HUIJING  SHI a1 and PETER B.  MOORE a1c1
a1 Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, USA

Abstract

The crystal structure of the monoclinic form of yeast phenylalanine tRNA has been redetermined at a resolution of 1.93 [Angstrom capital A, ring]. The structure of yeast tRNAphe described here is more accurate than its predecessors not only because it incorporates higher resolution data, but also because it has been refined using techniques that had not been developed when its predecessors were determined more than 20 years ago. The 1.93 [Angstrom capital A, ring] resolution version of this structure differs interestingly from its predecessors in its details. In loop regions particularly, the backbone torsion angles in the new structure are not the same as those reported earlier. Several new divalent cation binding sites have been identified, and the water structure that has emerged is also different.

(Received February 17 2000)
(Revised March 14 2000)
(Accepted May 10 2000)


Key Words: crystal structure; phenylalanine; tRNA; yeast.

Correspondence:
c1 Reprint requests to: Peter B. Moore, Department of Chemistry, Yale University, 350 Edwards Street, New Haven, Connecticut 06520-8107, USA; e-mail: moore@proton.chem.yale.edu.