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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Clathrin-coated vesicles from rat liver: enzymatic profile and characterization of ATP-dependent proton transport.

Clathrin-coated vesicles isolated from rat liver exhibited an enzymatic profile distinct from that of rat liver plasma membranes, lysosomes, microsomes, and mitochondria. The coated vesicles catalyzed ATP-dependent proton transport that acidified the vesicle interior, as measured by the fluorescence quenching of acridine orange. H+ transport by coated vesicles was not inhibited by vanadate (0.1 mM) or ouabain (2 mM) and differed from H+ transport by rat liver submitochondrial particles in its greater resistance to inhibition by oligomycin (10 pM to 10 microM) and N,N'-dicyclohexylcarbodiimide (DCCD) (0.1-100 microM) and its sensitivity to N-ethylmaleimide (0.1-2 mM). H+ transport was stimulated by valinomycin in the presence of K+, exhibited no specific cation requirement, but was dependent upon the presence of a permeant anion, with Cl- and Br- being the most effective of the anions studied. Finally, H+ transport was poorly supported by GTP, UTP, or ADP and exhibited no consistent relationship to the coated vesicle-associated ouabain-insensitive ATPase activity.[1]

References

  1. Clathrin-coated vesicles from rat liver: enzymatic profile and characterization of ATP-dependent proton transport. Van Dyke, R.W., Steer, C.J., Scharschmidt, B.F. Proc. Natl. Acad. Sci. U.S.A. (1984) [Pubmed]
 
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