The amino acid sequence of the 50-kDa fragment of rabbit skeletal muscle myosin heavy chain (residues 205-636) was determined, yielding an 809-residue sequence when combined with other fragments.
The amino acid sequence of the 50-kDa fragment that is released by limited tryptic digestion of the head portion of rabbit skeletal muscle myosin was determined by analysis and alignment of sets of peptides generated by digestion of the fragment at arginine or methionine residues. This fragment contains residues 205-636 of the myosin heavy chain; among the residues of particular interest in this fragment are N epsilon-trimethyllysine, one of four methyl-amino acids in myosin, and Ser-324, which is photoaffinity labeled by an ATP analogue (Mahmood, R., Elzinga, M., and Yount, R. G. (1989) Biochemistry 28, 3989-3995). Combination of this sequence with those of the 23- and 20-kDa fragments yields an 809-residue sequence that constitutes most of the heavy chain of chymotryptic S-1 of this myosin.
Tong et al. (Thu,) reported a other. The amino acid sequence of the 50-kDa fragment of rabbit skeletal muscle myosin heavy chain (residues 205-636) was determined, yielding an 809-residue sequence when combined with other fragments.