Determination of the amino acid sequence of troponin C from rabbit skeletal muscle

J. H. Collins, M. L. Greaser, J. D. Potter, M. J. Horn

Research output: Contribution to journalArticlepeer-review

135 Scopus citations


The complete amino acid sequence of rabbit skeletal muscle troponin C (TnC) was determined from studies on overlapping peptides isolated from cyanogen bromide and tryptic digests. TnC was found to be a single polypeptide chain of 159 amino acid residues, including 2 residues of tyrosine and 1 each of cysteine, histidine, and proline. The amino end is acetylated, the calculated net charge at pH 7.0 is -29, and the calculated molecular weight is 17,965. There was no evidence for heterogeneity in the sequence. The previously proposed four apparent Ca2+ binding sites are located at residues 27 to 38, 63 to 74, 103 to 114, and 139 to 150.

Original languageEnglish (US)
Pages (from-to)6356-6362
Number of pages7
JournalJournal of Biological Chemistry
Issue number18
StatePublished - 1977

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology


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