Stop codon read-through?

Rafael Maldonado rafael at
Tue Feb 18 18:08:44 EST 1997

On Mon, 17 Feb 1997, Harris Laboratory wrote:

> Is there any evidence for read-through on a UAG stop codon? If so what
> examples are available?

Yes. In the Moloney Murine Leukemia Virus (MuLV). Check Wills et al (1991), 
PNAS 88:6991-95.

> We have a cDNA sequence that contains an addition of 45 bp.  This
> causes an codon shift that results in a premature stop codon.  This
> should yield a 11 kDa protein when translated.  However in in vitro
> translation system, a 59 kDa protein is generated & detected via
> Western analysis.

Is there no trace of the predicted 11 KDa protein? Most of the readtrough
cases are not 100%. 

> Any help would be appreciated.

We would be very interested in helping you. Taking a look to the 
actual sequence could be very helpful; there could be several recoding 
signals involved.


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