Nucleic-acid constituents. X. The crystal and molecular structure of adenosine-5'-O-methylphosphate
Abstract
<h2>Acta Crystallographica Section B</h2><h3>Structural Crystallography and Crystal Chemistry</h3><h3>0567-7408</h3> <h2>research papers</h2> Volume 34 Part 12 Pages 3662-3666 December 1978 <h2>Nucleic-acid constituents. X. The crystal and molecular structure of adenosine-5'- O -methylphosphate</h2> J. D. Hoogendorp, G. C. Verschoor and C. Romers Acta Cryst. (1978). B34, 3662-3666 Nucleic-Acid Constituents. X.* The Crystal and Molecular Structure of Adenosine-Y-O-methylphosphate BY J. D. HOOGENDORP, G. C. VERSCHOOR AND C. ROMERS Gorlaeus Laboratoria, X-ray and Electron Diffraction Section, University of Leiden, Leiden, The Netherlands (Received 19 May 1978; accepted 18 July 1978) Adenosine-5'-O-methylphosphate, C ~IH16N507P, crystallizes in the orthorhombic system with very unusual space group I222. The lattice constants at 20°C are a = 17.244 (8), b = 13.309 (7) and c = 15.037 (7) A. There are eight mononucleotides per unit cell as well as an undefined number of methanol molecules in disordered positions. The space group and structure were determined by Patterson analysis and direct methods. The structure was refined by a least-squares procedure (Rw = 3.8%). The adenine moiety has the anti configuration (Z -- 68.6 o) with respect to the sugar. The ribose ring has an S-conformation [C(2')-endo] with pseudorotation angle P = 171.7 and ~max = 33"9°" The side-chain orientation