M. Iwaoka et al., Statistical characterization of nonbonded S center dot center dot center dot O interactions in proteins, CHEM LETT, (2), 2001, pp. 132-133
Weak nonbonded S . . .O interactions were characterized as stabilizing forc
es of protein structures based on the database analysis of selected heterog
eneous structures in Protein Data Bank (PDB) as well as quantum chemical ca
lculations at MP2/6-31G(d).