Predicted to enable cell adhesion molecule binding activity; fibronectin binding activity; and protein kinase binding activity. Predicted to contribute to C-X3-C chemokine binding activity and laminin binding activity. Predicted to be involved in several processes, including cell adhesion mediated by integrin; cell-matrix adhesion; and integrin-mediated signaling pathway. Predicted to act upstream of or within cell adhesion. Predicted to be located in membrane. Predicted to be part of integrin complex. Predicted to be active in cell surface; focal adhesion; and synapse. Is expressed in several structures, including gill; integument; liver; periderm; and pleuroperitoneal region. Orthologous to human ITGB1 (integrin subunit beta 1).