How can we classify proteins according to their functions?

Structural proteins (determination of structure of cells and membrane, Actin, myosin and tublin)/ Regulatory proteins (control physiological processes and metabolism, Hormones (insulin and glucagon, growth hormones))/Contraction proteins (organism movement, cell movement and organelle movement, actin myosin, tubulin, dynein and kinesin who are also refered to as motor proteins)-Defense proteins (effective actors in the immune system, antibodies, T lymphocyte receptors, protein of complement.)/Transport proteins (transportation of entities ranging from electrons (cytochromes) to ions (Na+ pumps) and macromolecules and vesicles (dynein, kinesin)/Catalytic proteins (catalyze biochemical reactions anabolic and catabolic (enzymes such as trypsin amylase..)