doi: 10.1016/s0006-291x(86)80387-4.
Characterization of structural unit of phospholamban by amino acid sequencing and electrophoretic analysis
- PMID: 3753485
- DOI: 10.1016/s0006-291x(86)80387-4
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Characterization of structural unit of phospholamban by amino acid sequencing and electrophoretic analysis
Biochem Biophys Res Commun.
.
Abstract
The partial amino acid sequence of phospholamban from canine cardiac sarcoplasmic reticulum was determined by sequence analysis of the peptides obtained from the protein cleaved by cyanogen bromide and with TPCK-trypsin. The sequence determined initiated with N alpha-acetylated methionine followed by 44 amino acid residues intervening two unidentified residues. This polypeptide would represent a structural unit (protomer) of phospholamban. Analysis of temperature-dependent conversion of phospholamban from 26 kDa to lower molecular weight form (6 kDa) suggested that phospholamban holoprotein is composed of five identical protomers.
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