1-alpha,25-dihydroxyvitamin D3 23-hydroxylase activity
Catatlysis of the reaction: calcitriol + 2 H+ + O2 + 2 reduced [adrenodoxin] = 1alpha,23S,25-trihydroxycholecalciferol + H2O + 2 oxidized [adrenodoxin].
GO:0062179
vitamin D 23-hydroxylase activity
is_a