6-carboxytetrahydropterin synthase activity
Catalysis of the reaction: 7,8-dihydroneopterin 3'-triphosphate + H2O = 6-carboxy-5,6,7,8-tetrahydropterin + triphosphate + acetaldehyde + 2 H+.
GO:0016832
aldehyde-lyase activity
is_a
6-carboxy-5,6,7,8-tetrahydropterin synthase activity
exact