Enables heparin binding activity. Predicted to be involved in extracellular matrix organization. Predicted to act upstream of or within establishment of protein localization to membrane; regulation of synaptic assembly at neuromuscular junction; and skeletal muscle acetylcholine-gated channel clustering. Predicted to be located in neuromuscular junction and plasma membrane. Predicted to be part of collagen trimer. Predicted to be active in extracellular matrix and extracellular space. Human ortholog(s) of this gene implicated in congenital myasthenic syndrome 5. Orthologous to human COLQ (collagen like tail subunit of asymmetric acetylcholinesterase). [provided by Alliance of Genome Resources, Apr 2022]