Enables NAADP-sensitive calcium-release channel activity. Involved in release of sequestered calcium ion into cytosol. Located in lysosomal membrane. Human ortholog(s) of this gene implicated in glycoproteinosis and mucolipidosis type IV. Orthologous to human MCOLN1 (mucolipin TRP cation channel 1). [provided by Alliance of Genome Resources, Apr 2022]