In vitro translation of rat lung surfactant apoprotein mRNA

Sikandar L. Katyal, Gurmukh Singh

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Rat pulmonary surfactant contains apoproteins of molecular weights 38,000, 32,000, 26,000 and 10,000-12,000. The structural and metabolic interrelationships of these proteins are not clear as yet. In order to investigate if they arise from a single or multiple precursor protein(s), we isolated total poly(A)RNA from rat lungs, performed its translation in vitro in the presence of [35s]-methionine and reticulocyte lysate, immunoprecipitated the translation products with anti-rat surfactant antibody, and analyzed them by SDS-polyacrylamide gel electrophoresis and autoradiography. A single translation product of molecular weight 35,000 was detected. Since the antibody used in the immunoprecipitation recognizes the 38,000, 32,000 and 26,000 dalton proteins, it is concluded that at least these three proteins arise from the 35,000 dalton precursor by post-translational modifications.

Original languageEnglish (US)
Pages (from-to)106-111
Number of pages6
JournalBiochemical and Biophysical Research Communications
Issue number1
StatePublished - Feb 28 1985

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology


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