[Rab1 protein]-O-phosphocholine-L-serine + CMP + H(+) => [Rab1 protein]-L-serine + CDP-choline
[rab1 protein]-o-phosphocholine-l-serine + cmp + h(+) => [rab1 protein]-l-serine + cdp-choline
[Rab1 protein]-O-phosphocholine-L-serine + CMP + H(+) => [Rab1 protein]-L-serine + CDP-choline
[rab1 protein]-o-phosphocholine-l-serine + cmp + h(+) => [rab1 protein]-l-serine + cdp-choline