O-phospho-L-seryl-[protein] + GDP + H(+) => L-seryl-[protein] + GTP
o-phospho-l-seryl-[protein] + gdp + h(+) => l-seryl-[protein] + gtp
O-phospho-L-seryl-[protein] + GDP + H(+) => L-seryl-[protein] + GTP
o-phospho-l-seryl-[protein] + gdp + h(+) => l-seryl-[protein] + gtp