Sarcalumenin is a
protein
Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respo ...
that in humans is encoded by the ''SRL''
gene
In biology, the word gene (from , ; "...Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a ba ...
.
Sarcalumenin is a
calcium-binding protein that can be found in the
sarcoplasmic reticulum of
striated muscle.
Sarcalumenin is partially responsible for calcium buffering in the
lumen of the sarcoplasmic reticulum and helps out
calcium pump
Calcium pumps are a family of ion transporters found in the cell membrane of all animal cells. They are responsible for the active transport of calcium out of the cell for the maintenance of the steep Ca2+ electrochemical gradient across the cell ...
proteins.
Additionally, sarcalumenin is necessary for keeping a normal
sinus rhythm during both
aerobic and
anaerobic exercise
Anaerobic exercise is a type of exercise that breaks down glucose in the body without using oxygen; ''anaerobic'' means "without oxygen". In practical terms, this means that anaerobic exercise is more intense, but shorter in duration than aerobi ...
activity.
Sarcalumenin is a calcium-binding glycoprotein composed of 473 acidic amino acids with a molecular weight of 160 KDa. Together along with other luminal calcium buffer proteins, sarcalumenin plays an important role in regulation of calcium uptake and release during excitation-contraction coupling (ECC) in muscle fibers.
References
External links
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Cell signaling
Signal transduction
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