Isolation of Totally Inverted Submitochondrial Particles by Sonication of Beef Heart Mitochondria
Overview
Biology
Endocrinology
Authors
Affiliations
A novel procedure for isolating totally inverted preparations of submitochondrial particles by sonication of beef heart mitochondria is described. The procedure involves only differential centrifugation in 0.25 M sucrose containing 0.15 M KCl. The submitochondrial particles have 96% of their cytoplasmic face cytochrome c-binding sites sequestered within the particles. Mild sonication exposes cytochrome c-binding sites to the medium. The oligomycin-sensitive ATPase of sonic-derived submitochondrial particles, like that of electron transport particles, is inhibited 98% by exogenous isolated ATPase inhibitor protein. NADH oxidase activity in these particles is inhibited by oligomycin. The respiratory control index (uncoupled rate/oligomycin-inhibited rate) is approximately 3.4 and can be increased by washing the particles with medium containing bovine serum albumin.
Treberg J, Quinlan C, Brand M FEBS J. 2010; 277(13):2766-78.
PMID: 20491900 PMC: 2891561. DOI: 10.1111/j.1742-4658.2010.07693.x.
Mirandola S, Melo D, Schuck P, Ferreira G, Wajner M, Castilho R J Inherit Metab Dis. 2008; 31(1):44-54.
PMID: 18213522 DOI: 10.1007/s10545-007-0798-1.
Determination of the orientation of membrane vesicles derived from mitochondria.
Harmon H J Bioenerg Biomembr. 1987; 19(2):167-89.
PMID: 3034872 DOI: 10.1007/BF00762723.