Hydroxylysine kinase (HYKK) phosphorylates 5-hydroxylysine (5HLYS), derived from food and collagen breakdown, to 5-phosphonooxy-L-lysine (5PHL) using GTP as the preferential phosphate donor (Veiga-da-Cunha et al. 2012).
Stroobant, V, Balligand, T, Veiga-da-Cunha, M, Van Schaftingen, E, Hadi, F
hydroxylysine kinase activity of HYKK [mitochondrial matrix]
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