In the functional assay five conserved mutations were functional (S182T, W183Y, L184I, I187L, I190L).
To identify which of the mutations were functional, promoter constructs were prepared with a dibasic change (−270_−269AA), a single base change (−220A), and a construct with both changes (−270_−269AA and −220A) (Fig. 1C).
The same mutation p.Pro12Leu was found in exon 2 in two patients; according to both the IARC International Agencyy for Research on Cancer) TP53 mutational database and UMD (Universal Mutation Database) TP53 mutation database, this mutation is functional in yeast but extremely rare.
Different kinds of software like polyphen-2 [39] and SIFT [40] have been developed to predict to which extent a variant or mutation is functional.
A possible explanation is that only recently inserted elements (i.e., those which have not been subject to mutations yet) are functional.
Outside of this cluster are transcription factors which potentially were affected by the fkh1 fkh2 mutation and thus are functional interaction partners of the forkhead transcription factors.
The causative mutational events for DDSH are functional null mutations, resulting in a truncated perlecan protein core that is not secreted (Table S5) (Arikawa-Hirasawa et al. 2001a).
However, many disease-causing missense mutations are without functional consequences (12, 17), nonetheless, the mutant is intercepted by the quality control system and delivered to the proteasome.
However, several pieces of evidence indicate that a subset of recurring mtDNA mutations are potentially functional and may even offer adaptive value.
The prediction score annotations for the four types of disease variants by GWAVA, Mutation Assessor, and CADD all suggest that cancer predisposing germline variants, Mendelian disease variants and recurrent cancer somatic mutations are more functional than complex disease variants.
