Abstract：
:Peutz-Jeghers Syndrome (PJS) is an autosomal dominant hereditary disease characterized by hamartomatous polyposis involving the entire bowel. Recently STK11, a gene bearing a mutation responsible for PJS, was isolated. We investigated the entire coding region of STK11 in 15 unrelated PJS families by the PCR-SSCP (polymerase chain reaction-single strand conformation polymorphism) method and PCR-direct sequence analysis, and found nine different, novel mutations among ten of those families. One nonsense mutation and five different frameshift mutations (two families carried the same mutation), all of which would cause truncation of the gene product, were found in seven families; mutations found in five families were clustered within exon 6. Among these five mutations, three occurred at the mononucleotide-repeat region (CCCCCC) of codons 279-281, suggesting that this region is likely to be a mutational hotspot of this gene. One of the remaining three families carried a 3-bp in-frame deletion that would eliminate an asparagine residue within a kinase domain of the product; the other two carried intronic mutations at or adjacent to the consensus dinucleotide sequences of splice-acceptor or -donor sites, which were likely to lead to aberrant splicing.
journal_name
Hum Genetjournal_title
Human geneticsauthors
Nakagawa H,Koyama K,Miyoshi Y,Ando H,Baba S,Watatani M,Yasutomi M,Matsuura N,Monden M,Nakamura Ydoi
10.1007/s004390050801subject
Has Abstractpub_date
1998-08-01 00:00:00pages
168-72issue
2eissn
0340-6717issn
1432-1203journal_volume
103pub_type
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