Amino-acid sequence of sarcoplasmic calcium-binding protein from scallop ( Patinopecten yessoensis) adductor striated muscle

Abstract

The amino-acid sequence of the sarcoplasmic calcium-binding protein from the adductor striated muscle of scallop ( Patinopecten yessoensis) has been established. It is composed of 176 amino-acid residues and is acetylated at the N-terminus. The molecular weight is calculated to be 20119. It is thought that scarcoplasmic Ca 2+-binding protein has four calcium-binding sites (I–IV) and in the case of scallop sarcoplasmic Ca 2+-binding protein, sites I and III are functioning and the other two (sites II and IV) may have lost their affinity to calcium by amino acid replacements during evolution.