Chapter title |
The SarcoEndoplasmic Reticulum Calcium ATPase
|
---|---|
Chapter number | 8 |
Book title |
Membrane Protein Complexes: Structure and Function
|
Published in |
Sub cellular biochemistry, January 2018
|
DOI | 10.1007/978-981-10-7757-9_8 |
Pubmed ID | |
Book ISBNs |
978-9-81-107756-2, 978-9-81-107757-9
|
Authors |
Joseph O. Primeau, Gareth P. Armanious, M’Lynn E. Fisher, Howard S. Young, Primeau, Joseph O., Armanious, Gareth P., Fisher, M’Lynn E., Young, Howard S. |
Abstract |
The calcium pump (a.k.a. Ca2+-ATPase or SERCA) is a membrane transport protein ubiquitously found in the endoplasmic reticulum (ER) of all eukaryotic cells. As a calcium transporter, SERCA maintains the low cytosolic calcium level that enables a vast array of signaling pathways and physiological processes (e.g. synaptic transmission, muscle contraction, fertilization). In muscle cells, SERCA promotes relaxation by pumping calcium ions from the cytosol into the lumen of the sarcoplasmic reticulum (SR), the main storage compartment for intracellular calcium. X-ray crystallographic studies have provided an extensive understanding of the intermediate states that SERCA populates as it progresses through the calcium transport cycle. Historically, SERCA is also known to be regulated by small transmembrane peptides, phospholamban (PLN) and sarcolipin (SLN). PLN is expressed in cardiac muscle, whereas SLN predominates in skeletal and atrial muscle. These two regulatory subunits play critical roles in cardiac contractility. While our understanding of these regulatory mechanisms are still developing, SERCA and PLN are one of the best understood examples of peptide-transporter regulatory interactions. Nonetheless, SERCA appeared to have only two regulatory subunits, while the related sodium pump (a.k.a. Na+, K+-ATPase) has at least nine small transmembrane peptides that provide tissue specific regulation. The last few years have seen a renaissance in our understanding of SERCA regulatory subunits. First, structures of the SERCA-SLN and SERCA-PLN complexes revealed molecular details of their interactions. Second, an array of micropeptides concealed within long non-coding RNAs have been identified as new SERCA regulators. This chapter will describe our current understanding of SERCA structure, function, and regulation. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 1 | 100% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 112 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 23 | 21% |
Student > Bachelor | 14 | 13% |
Student > Master | 13 | 12% |
Student > Doctoral Student | 10 | 9% |
Researcher | 4 | 4% |
Other | 11 | 10% |
Unknown | 37 | 33% |
Readers by discipline | Count | As % |
---|---|---|
Biochemistry, Genetics and Molecular Biology | 36 | 32% |
Agricultural and Biological Sciences | 7 | 6% |
Medicine and Dentistry | 7 | 6% |
Chemistry | 6 | 5% |
Pharmacology, Toxicology and Pharmaceutical Science | 4 | 4% |
Other | 14 | 13% |
Unknown | 38 | 34% |