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- Table of Contents
Facts about Calsequestrin-1.
Can bind around 80 Ca(2+) ions (PubMed:28895244). Regulates the discharge of lumenal Ca(2+) through the calcium release channel RYR1; this plays an significant role in triggering muscle contraction.
Human | |
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Gene Name: | CASQ1 |
Uniprot: | P31415 |
Entrez: | 844 |
Belongs to: |
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calsequestrin family |
calmitin; calmitine; calsequestrin 1 (fast-twitch, skeletal muscle); Calsequestrin, skeletal muscle isoform; calsequestrin-1; CASQ; PDIB1
Mass (kDA):
45.16 kDA
Human | |
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Location: | 1q23.2 |
Sequence: | 1; NC_000001.11 (160190575..160201886) |
Expressed in myoblasts (at protein level).
Endoplasmic reticulum. Sarcoplasmic reticulum. Sarcoplasmic reticulum lumen. Sarcoplasmic reticulum membrane; Peripheral membrane protein; Lumenal side. Mitochondrion matrix. This isoform of calsequestrin occurs in the sarcoplasmic reticulum's terminal cisternae luminal spaces of fast skeletal muscle cells. Preferentially forms linear and round aggregates in the endoplasmic reticulum (ER) of resting cells (PubMed:28895244). In a minority of cells, homogeneously detected in the ER lumen (PubMed:28895244). Colocalizes with STIM1 at endoplasmic reticulum in response to a depletion of intracellula
PMID: 2321095 by Fujii J., et al. Characterization and localization to human chromosome 1 of human fast-twitch skeletal muscle calsequestrin gene.
PMID: 7945294 by Bataille N., et al. Molecular cloning of human calmitine, a mitochondrial calcium binding protein, reveals identity with calsequestrine.