Enables scaffold protein binding activity. Predicted to be involved in several processes, including cellular response to amyloid-beta; positive regulation of tumor necrosis factor-mediated signaling pathway; and protein autoprocessing. Predicted to act upstream of or within ectopic germ cell programmed cell death; positive regulation of interleukin-1 beta production; and pyroptosis. Located in neuron projection and neuronal cell body. Part of protein-containing complex. Orthologous to human CASP4 (caspase 4). [provided by Alliance of Genome Resources, Apr 2022]