L-seryl-[Goodpasture antigen-binding protein] + ATP <=> O-phospho-L-seryl-[Goodpasture antigen-binding protein] + ADP + H(+)
l-seryl-[goodpasture antigen-binding protein] + atp <=> o-phospho-l-seryl-[goodpasture antigen-binding protein] + adp + h(+)