Protease in yeast

[Charles Brenner]

poonso at NWG.NECTEC.OR.TH (Poonsook Orprayoon) writes:

>I wonder if anyone know what is STE13 gene product in yeast , Pichia in 
>this case?  As I understand, it is a protease that cut Glu-Ala repeat??
>If I have Glu-Ala in other region of the protein, will STE13 gene product 
>cut it as well?

>Also, I am looking for protease negative strain of Pichia pastoris.  Let 
>me know if anyone have.  Thanks.

>Poonsook

In cerevisiae, the product of the STE13 gene is a type IV dipeptidyl
aminopeptidase that removes X-Ala dipeptides from the amino-termini of
alpha factor processing intermediates.  Like other type IV DPAPases it
can also remove X-Pro dipeptides from amino-termini and it actually
removes a couple of these dipeptides from the mature amino-terminus of
Kex2 protease.  Because it is an aminopeptidase, no it will not remove
internal Glu-Ala sequences.

Charlie Brenner

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