The p.Cys99Tyr variation is only described in Tunisian families making evidence of founder effect mutation of likely Tunisian origin.
However, aetiological point mutations of FOXP2 likely account for only ∼2% of children with DVD; other key genetic risk factors remain to be discovered.
Indeed, mutation of PTEN likely contributes to the initiation of endometrial tumorigenesis, as this gene is also altered in premalignant endometrial hyperplasia (Sansal and Sellers, 2004).
Overall, we suspect that stop-loss mutations of uORFs are likely to represent an under-recognized class of hypomorphic mutations, although a search of the Human Gene Mutation Database (HGMD) (see Materials and Methods) did not yield any definite examples.
Genes were selected for mutation analysis on the basis of likely high mutation frequency (based on cMS length), likely immunogenicity (based on mutant C-terminus amino acid length) and likely expression in colon cancer (based on gene and protein expression data where available).
For example, adaptive loss-of-function mutations likely have a much higher value of UA than adaptive single-nucleotide mutations.
All three variants affect the LRR-domain and are considered loss-of-function mutations, likely to impair the recognition of microbial components, interfering with appropriate activation of NF-κB in monocytes, as well as disregulating NOD1 function.
Previous studies examining viral evolution during acute and early HCV infection on a small number of subjects showed that the proportion of mutations likely to be associated with CD8+ T-cell immune pressure varies from 11 25% [9], [13].
It was hypothesized that the differences in the rates of mutations most likely would affect lengths of branches in phylogenetic trees, while the horizontal gene transfer would cause predominantly topological changes.
