Predicted to enable serine-type endopeptidase inhibitor activity. Involved in positive regulation of collagen biosynthetic process; positive regulation of cytokine production; and positive regulation of glomerular mesangial cell proliferation. Predicted to be active in extracellular space. Biomarker of nephritis. Human ortholog(s) of this gene implicated in IgA glomerulonephritis and familial encephalopathy with neuroserpin inclusion bodies. Orthologous to human SERPINB7 (serpin family B member 7). [provided by Alliance of Genome Resources, Apr 2022]