Cell-free protein synthesis by kidney from the aging female Fischer F344 RAT

James Hardwick, Wen Hao Hsieh, Daniel S.H. Liu, Arlan Richardson

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

This is the first report to describe and characterize a cell-free protein synthesis system derived from kidney tissue. The optimum conditions for [3H]valine incorporation into protein by the post-mitochondrial supernatant from whole kidneys were found to be: pH 6.9, 7.5 mM MgCl2, 150 mM KCl, 10 mM ATP, and 2 mM GTP. The cell-free protein-synthetising activities of kidneys isolated from 4.5-, 7.5-, 22-, and 31-month-old female Fischer F344 rats were measured using the post-mitochondrial supernatant. A 73-87% decrease in cell-free protein synthesis was observed between 4.5 and 31 months of age. Both the cell sap and microsomal fractions of the kidney post-mitochondrial super-natant from old rats were less active in protein synthesis than these fractions from the kidneys of young rats. No age-related change in the activity of RNA-ase in the kidney post-mitochondrial supernatant was observed. Kidney ribosomes stripped of endogenous mRNA were found to be active in poly(uridylic acid)-directed polyphenylalanine synthesis. The effect of aging on the fidelity of translation was determined by measuring poly(uridylic acid)-directed [14C]-phenylalanine and [3H]leucine incorporation by kidney ribosomes isolated from rats of various ages. No age-related change in the fidelity of poly(uridylic acid) translation by kidney ribosomes was observed.

Original languageEnglish (US)
Pages (from-to)204-217
Number of pages14
JournalBBA Section Nucleic Acids And Protein Synthesis
Volume652
Issue number1
DOIs
StatePublished - Jan 29 1981

Keywords

  • (Rat kidney)
  • Aging
  • Protein synthesis
  • Ribosome

ASJC Scopus subject areas

  • Medicine(all)

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