Comparative study of the characteristics of the proton NMR spin echo decay of different globular proteins in water
Aksenov, S.I.; Filatov, A.V.
Biofizika 24(4): 602-605
1979
ISSN/ISBN: 0006-3029 PMID: 476163 Document Number: 141376
Spin-echo decays were studied for protons of 7 enzymes and 4 other globular proteins. Similar decay behaviour of the skin-echo decay curves was observed for all non-enzymatic proteins (motion of protein globules as whole units was taken into account). The spin-echo decay surves of 5 monomeric enzymes also exhibited very close decay patterns, although they decayed more slowly than non-enzymatic proteins. Greater slowing of the decay was observed for proton spin echoes in two subunit enzymes. Observed slowing of the decay is interpreted in terms of more intense inner motions within the macromolecules of enzymes, compared to non-enzymes. In subunit enzymes it occurs in addition because of the motion of separate units.