Enables acyltransferase activity, transferring groups other than amino-acyl groups. Involved in positive regulation of cold-induced thermogenesis. Acts upstream of or within fatty acid elongation. Is integral component of endoplasmic reticulum membrane. Is expressed in several structures, including alimentary system; genitourinary system; nervous system; respiratory system; and sensory organ. Orthologous to human ELOVL6 (ELOVL fatty acid elongase 6). [provided by Alliance of Genome Resources, Apr 2022]