Crystal structure of N-acetyl-L-ornithine transcarbamylase K302R mutant complexed with PALAO

Reversible post-translational carboxylation modulates the enzymatic activity of N-acetyl-L-ornithine transcarbamylase.

MGSSHHHHHHSSGLVPRGSHMSLKHFLNTQDWSRAELDALLTQAALFKRNKLGSELKGKSIALVFFNPSMRTRTSFELGA
FQLGGHAVVLQPGKDAWPIEFNLGTVMDGDTEEHIAEVARVLGRYVDLIGVRAFPKFVDWSKDREDQVLKSFAKYSPVPV
INMETITHPCQELAHALALQEHFGTPDLRGKKYVLTWTYHPKPLNTAVANSALTIATRMGMDVTLLCPTPDYILDERYMD
WAAQNVAESGGSLQVSHDIDSAYAGADVVYAKSWGALPFFGNWEPEKPIRDQYQHFIVDERKMALTNNGVFSHCLPLRRN
VRATDAVMDSPNCIAIDEAENRLHVQKAIMAALVGQSRP

Lithium sulfate, Bis-tris, PEG3350, pH 6.0, hanging drop, temperature 291K

The wild-type protein complexed with PALAO

MSLKHFLNTQDWSRAELDALLTQAALFKRNKLGSELKGKSIALVFFNPSMRTRTSFELGAFQLGGHAVVLQPGKDAWPIE
FNLGTVMDGDTEEHIAEVARVLGRYVDLIGVRAFPKFVDWSKDREDQVLKSFAKYSPVPVINMETITHPCQELAHALALQ
EHFGTPDLRGKKYVLTWTYHPKPLNTAVANSALTIATRMGMDVTLLCPTPDYILDERYMDWAAQNVAESGGSLQVSHDID
SAYAGADVVYAKSWGALPFFGNWEPEKPIRDQYQHFIVDERKMALTNNGVFSHCLPLRRNVKATDAVMDSPNCIAIDEAE
NRLHVQKAIMAALVGQSRP