[Study of sarcoplasmic reticulum Ca-ATPase by the paramagnetic label--paramagnetic probe method].

Autor: Kotel'nikova RA, Tat'ianenko LV, Kulikov AV, Kotel'nikov AI, Mel'nikov AV
Jazyk: ruština
Zdroj: Biofizika [Biofizika] 1979 Sep-Oct; Vol. 24 (5), pp. 839-42.
Abstrakt: ESR spectra of nitroxyl derivative labelling with parachlormercury benzoate bound with SH-groups of Ca, Mg-dependent ATPase in the presence of Mn2+ ions are studied. It has been concluded from the saturation curves of ESR spectra that Mn2+ is localized at the distance approximately 40 A from the SH-group of the enzyme active centre. Platinum compound (K2PtCl4) changes the spectrum of ESR 1 due to the displacement of the label from the enzyme SH-groups and disintegration of the sarcoplasmic reticulum structure. Palladium compound (Pd(NH3)4Cl2) produced no effect on the ESR 1 spectrum.
Databáze: MEDLINE