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Sarcolipin

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Synonyms

SLN

Historical Background

Sarcolipin (SLN) was first identified by David MacLennan in 1974 as a “proteolipid” in purified rabbit skeletal muscle sarcoplasmic reticulum (SR) preparations (MacLennan 1974). In 1992, Wawrzynow et al. determined its sequence, confirmed its molecular weight as 3,733 Da, and named it sarcolipin (SLN) with reference to its nature and origin (Wawrzynow et al. 1992). SLN protein sequence is highly conserved from fish to man. For nearly three decades, the exact function of SLN remained unknown. Early studies suggested that it is very similar to phospholamban (PLB), an important regulator of the SERCA pump in cardiac muscle (Fig. 1). Using reconstituted synthetic SLN and SERCA, Lee et al. first proposed the idea that SLN binding to SERCA could promote uncoupling of SERCA ATP hydrolysis from Ca2+ transport (Mall et al. 2006). More recent studies from our laboratory have shown that SLN binding to SERCA causes uncoupling of SR Ca2+transport from ATP...

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References

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  • Asahi M, Sugita Y, Kurzydlowski K, De Leon S, Tada M, Toyoshima C, et al. Sarcolipin regulates sarco (endo) plasmic reticulum Ca2+-ATPase (SERCA) by binding to transmembrane helices alone or in association with phospholamban. Proc Natl Acad Sci USA. 2003;100(9):5040–5.

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  • Sahoo SK, Shaikh SA, Sopariwala DH, Bal NC, Bruhn DS, Kopec W, et al. The N terminus of sarcolipin plays an important role in uncoupling sarco-endoplasmic reticulum Ca2+-ATPase (SERCA) ATP hydrolysis from Ca2+ transport. J Biol Chem. 2015;290(22):14057–67.

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Correspondence to Muthu Periasamy .

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Singh, S., Sahoo, S.K., Periasamy, M. (2018). Sarcolipin. In: Choi, S. (eds) Encyclopedia of Signaling Molecules. Springer, Cham. https://doi.org/10.1007/978-3-319-67199-4_101787

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