The first seven amino acids encoded by the v-src oncogene act as a myristylation signal: lysine 7 is a critical determinant

Mol Cell Biol. 1988 Jun;8(6):2435-41. doi: 10.1128/mcb.8.6.2435.

Abstract

The transforming protein of Rous sarcoma virus, pp60v-src, is covalently coupled to myristic acid by an amide linkage to glycine 2. Myristylation promotes the association of pp60v-src with cellular membranes, and this subcellular location is essential for transforming activity. The findings presented here, in conjunction with the previous reports of others, imply that the seventh amino acid encoded by v-src might be important in the myristylation reaction. Replacement of lysine 7 by asparagine greatly reduced the myristylation, membrane association, and transforming activity of pp60v-src. In contrast, substitution of arginine at residue 7 had no effect on any of these properties of pp60v-src. Addition of amino acids 1 to 7 encoded by v-src was sufficient to cause myristylation of a src-pyruvate kinase fusion protein. We conclude that the recognition sequence for myristylation of pp60v-src comprises amino acids 1 to 7 and that lysine 7 is a critical component of this sequence.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Acylation
  • Amino Acid Sequence
  • Animals
  • Antibodies, Monoclonal / immunology
  • Avian Sarcoma Viruses / genetics*
  • Cells, Cultured
  • Chick Embryo
  • Electrophoresis, Polyacrylamide Gel
  • Fibroblasts / microbiology
  • Lysine / analysis
  • Myristic Acid
  • Myristic Acids / metabolism*
  • Oncogene Protein pp60(v-src)
  • Protein Kinases / analysis
  • Protein Kinases / metabolism*
  • Retroviridae Proteins / analysis
  • Retroviridae Proteins / immunology
  • Retroviridae Proteins / metabolism*

Substances

  • Antibodies, Monoclonal
  • Myristic Acids
  • Retroviridae Proteins
  • Myristic Acid
  • Protein Kinases
  • Oncogene Protein pp60(v-src)
  • Lysine