Component of the sarcomeric M-band which plays a role in myocyte response to biomechanical stress (By similarity). May regulate expression of other M-band proteins via an SRF-dependent pathway (By similarity). Important for normal contractile function in heart (PubMed:20847312). {ECO:0000250|UniProtKB:D3ZXS4, ECO:0000269|PubMed:20847312}.
Will, Eden, Just, Hansen, Eder, Frank, Kuhn, Seeger, Oehl, Wiemann, Korn, Koegl, Rottbauer, Eschenhagen, Katus, Frey: "Myomasp/LRRC39, a heart- and muscle-specific protein, is a novel component of the sarcomeric M-band and is involved in stretch sensing." in: Circulation research, Vol. 107, Issue 10, pp. 1253-64, (2010) (PubMed).