TY - JOUR
T1 - Widespread control of calcium signaling by a family of SERCA-inhibiting micropeptides
AU - Anderson, Douglas M.
AU - Makarewich, Catherine A.
AU - Anderson, Kelly M.
AU - Shelton, John M.
AU - Bezprozvannaya, Svetlana
AU - Bassel-Duby, Rhonda
AU - Olson, Eric N.
N1 - Funding Information:
This work was supported by grants from the NIH (HL129674, HL130253, HL-077439, DK-099653, AR-067294, and U01-HL-100401), Fondation Leducq Networks of Excellence, and the Robert A. Welch Foundation (grant 1-0025 to E.N.O.).
Publisher Copyright:
© 2016 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.
PY - 2016/12/6
Y1 - 2016/12/6
N2 - Micropeptides function as master regulators of calcium-dependent signaling in muscle. Sarco/endoplasmic reticulum Ca2+ ATPase (SERCA), the membrane pump that promotes muscle relaxation by taking up Ca2+ into the sarcoplasmic reticulum, is directly inhibited by three muscle-specific micropeptides: myoregulin (MLN), phospholamban (PLN), and sarcolipin (SLN). The widespread and essential function of SERCA across diverse cell types has raised questions as to how SERCA is regulated in cells that lack MLN, PLN, and SLN. We identified two transmembrane micropeptides, endoregulin (ELN) and another-regulin (ALN), that share key amino acids with their muscle-specific counterparts and function as direct inhibitors of SERCA pump activity. The distribution of transcripts encoding ELN and ALN mirrored that of SERCA isoform-encoding transcripts in nonmuscle cell types. Our findings identify additional members of the SERCA-inhibitory micropeptide family, revealing a conserved mechanism for the control of intracellular Ca2+ dynamics in both muscle and nonmuscle cell types.
AB - Micropeptides function as master regulators of calcium-dependent signaling in muscle. Sarco/endoplasmic reticulum Ca2+ ATPase (SERCA), the membrane pump that promotes muscle relaxation by taking up Ca2+ into the sarcoplasmic reticulum, is directly inhibited by three muscle-specific micropeptides: myoregulin (MLN), phospholamban (PLN), and sarcolipin (SLN). The widespread and essential function of SERCA across diverse cell types has raised questions as to how SERCA is regulated in cells that lack MLN, PLN, and SLN. We identified two transmembrane micropeptides, endoregulin (ELN) and another-regulin (ALN), that share key amino acids with their muscle-specific counterparts and function as direct inhibitors of SERCA pump activity. The distribution of transcripts encoding ELN and ALN mirrored that of SERCA isoform-encoding transcripts in nonmuscle cell types. Our findings identify additional members of the SERCA-inhibitory micropeptide family, revealing a conserved mechanism for the control of intracellular Ca2+ dynamics in both muscle and nonmuscle cell types.
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U2 - 10.1126/scisignal.aaj1460
DO - 10.1126/scisignal.aaj1460
M3 - Article
C2 - 27923914
AN - SCOPUS:85003678382
SN - 1945-0877
VL - 9
JO - Science signaling
JF - Science signaling
IS - 457
M1 - ra119
ER -