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Complex replication error causes p53 mutation in a Li-Fraumeni family
release_nsqi5lxq6ncy7o2j4xyifofq2y
by
E A Strauss,
M R Hosler,
P Herzog,
K Salhany,
R Louie,
C A Felix
Published
in Cancer Research
.
1995 Volume 55, Issue 15, p3237-41
Abstract
We demonstrated a germline p53 replication error in two generations of a Li-Fraumeni family affected with liposarcoma, adrenocortical carcinoma, and osteosarcoma. The trinucleotide repeat mutation changed 5'-AGT GTG GTG GTG-3' at codons 215-218 to 5'-AGT TGG TTG GTG GTG-3'. The predicted protein would be elongated by one amino acid (val216-->trp leu) without a change in charge. Detection of p53 in the adrenal tumor by immunostaining suggested that the mutant protein was expressed. Persistence of the mutation in the germline may suggest a defect in DNA repair in the family member first affected. This is the first report where germline transmission of replication-damaged p53 trinucleotide repeats is associated with the Li-Fraumeni syndrome.
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