Circadian rhythm of tRNA aminoacylation in hepatocyte culture
Boĭkov, P.I.; Novikova, T.E.; Shevchenko, N.A.; Papina, R.I.; Brodskiĭ, V.I.
Biulleten' Eksperimental'noi Biologii i Meditsiny 109(4): 393-395
1990
ISSN/ISBN: 0365-9615 PMID: 2386836 Document Number: 348663
In the monolayer of rat hepatocytes in vitro, the circadian rhythms were revealed of 3H-leucine incorporation in proteins and in aminoacyl-tRNA(Leu) fraction. The oscillations were mainly synphasic, though coordination between aminoacylation and protein synthesis was not stable in the coarse of time. In cell free system with the excess of ATP and aa-tRNA, the rhythm of 3H-leucine incorporation was also clear. This means, that oscillatory kinetics of the protein synthesis rate is not caused by oscillation of ATP which has been revealed earlier in the hepatocyte monolayer.