Structural highlights 
  Function 
D9PYV4_METTM Catalyzes the reduction of hydroxylamine to form NH(3) and H(2)O.[HAMAP-Rule:MF_00069]  Rubredoxin is a small nonheme, iron protein lacking acid-labile sulfide. Its single Fe, chelated to 4 Cys, functions as an electron acceptor and may also stabilize the conformation of the molecule.[ARBA:ARBA00002360]