Predicted to enable phosphotyrosine residue binding activity. Predicted to be involved in negative regulation of B cell activation; negative regulation of adaptive immune response; and negative regulation of peptidyl-tyrosine phosphorylation. Predicted to be located in cytosol. Predicted to be active in cytoplasm and nucleus. Orthologous to human SAMSN1 (SAM domain, SH3 domain and nuclear localization signals 1). [provided by Alliance of Genome Resources, Apr 2022]