InterPro domain: IPR044631

Ethylene biosynthesis is directed by a family of 1-aminocyclopropane-1-carboxylic acid (ACC) synthases (ACS) that convert S-adenosyl-l-methionine to the immediate precursor ACC. This entry represents a group of plant BTB domain containing proteins involved in the the ethylene pathway, including ETO1, EOL1 and EOL2 from Arabidopsis. They contain six tetratricopeptide repeats (TPR), and a coiled-coil motif at their C-terminal. They act together to negatively regulate ethylene synthesis by directing the degradation of type-2 ACS proteins [ 1 ].

1. The BTB ubiquitin ligases ETO1, EOL1 and EOL2 act collectively to regulate ethylene biosynthesis in Arabidopsis by controlling type-2 ACC synthase levels. Plant J. 57, 332-45