InterPro domain: IPR013626

This domain is found in bacterial and plant proteins to the C terminus of a Rieske 2Fe-2S domain ( IPR017941 ). One of the proteins the domain is found in is Pheophorbide a oxygenase (PaO) which seems to be a key regulator of chlorophyll catabolism. Arabidopsis PaO (AtPaO) is a Rieske-type 2Fe-2S enzyme that is identical to Arabidopsis accelerated cell death 1 and homologous to lethal leaf spot 1 (LLS1) of maize [ 1 ], in which the domain described here is also found.

1. Chlorophyll breakdown: pheophorbide a oxygenase is a Rieske-type iron-sulfur protein, encoded by the accelerated cell death 1 gene. Proc. Natl. Acad. Sci. U.S.A. 100, 15259-64