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Cleavage site for pathogenic type III effector avirulence factor Avr This domain is conserved in small families of otherwise unrelated proteins in both mono-cots and di-cots, suggesting that it has a conserved, plant-specific function. It is found both in the plant RIN4 (resistance R membrane-bound host-target protein) where it appears to contribute to the binding of the protein to both RCS (AvrRpt2 auto-cleavage site) and AvrB, the virulence factor from the infecting bacterium. The cleavage site for the AvrRpt2 avirulence protein would appear to be the sequence motifs VPQFGDW and LPKFGEW, both of which are highly conserved within the domain.
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