Steroidogenic activity of a peptide specified by the reversed sequence of corticotropin mRNA

Academic Article

Abstract

  • The molecular recognition theory predicts that a reversed (3'→5') reading of an mRNA should yield a peptide that is structurally and functionally similar to that specified in the 5'→3' direction. We tested this idea by synthesizing a corticotropin (ACTH) analogue using a reverse reading of bovine mRNA for ACTH-(1-24). This peptide, designated ACTH-3'→5', had a similar hydropathic profile to native ACTH-5'→3' but had only 30% sequence homology and eight different charge substitutions. ACTH-3'→5' specifically bound to the surface of mouse Y-1 adrenal cells and to polyclonal anti-ACTH antibody. Additionally, ACTH-3'→5' stimulated cAMP synthesis and steroidogenesis in adrenal cells. These findings show that ACTH-3'→5' mimics the corticotropic properties of native ACTH, thereby further validating the molecular recognition theory.
  • Authors

    Digital Object Identifier (doi)

    Pubmed Id

  • 20409810
  • Author List

  • Clarke BL; Blalock JE
  • Start Page

  • 9708
  • End Page

  • 9711
  • Volume

  • 87
  • Issue

  • 24