Identification of a region of calsequestrin that binds to the junctional face membrane of sarcoplasmic reticulum.
The interaction of calsequestrin (CSQ) with the channel-containing region of the sarcoplasmic reticulum (junctional face membrane, jfm) is involved in Ca2+ release, and it seemed of interest to identify the jfm-binding region of the CSQ molecule. For this purpose, CSQ was digested with trypsin, and peptides were screened for jfm binding. Partial amino acid sequencing of selected peptides allowed us to localize a critical site for jfm binding in the stretch encompassing residues 86-191.
Collins
J H
JH
Department of Biological Chemistry, School of Medicine, University of Maryland, Baltimore 21201.
Tarcsafalvi
A
A
Ikemoto
N
N
D000595:Amino Acid Sequence; D000818:Animals; D002155:Calsequestrin / Q000235:genetics* / Q000378:metabolism; D003208:Concanavalin A / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D007425:Intracellular Membranes / Q000378:metabolism; D008969:Molecular Sequence Data; D009124:Muscle Proteins / Q000235:genetics*; D009132:Muscles / Q000378:metabolism; D010446:Peptide Fragments / Q000378:metabolism; D011817:Rabbits; D012519:Sarcoplasmic Reticulum / Q000378:metabolism*
D002155:Calsequestrin; D009124:Muscle Proteins; D010446:Peptide Fragments; D003208:Concanavalin A