Finally, it is worth commenting that the enormous population mutation rate (4Ne μ) reported for C. savignyi (Vinson et al. 2005; Small et al. 2007), which is the double of that of O. dio i ca, is somewhat puzzling.
The pericentromeric ICCA area displays highly duplicated large DNA sequences[18], [19] and this may present an enormous challenge for mutation search.
Mutations often lead to loss of the tumor-suppressive functions of p53 - especially the transcription-dependent functions, highlighted by the enormous hot-spot mutations in the DNA-binding domain - thereby leading to uncontrolled cellular growth [1] [3].
Taking advantage of C. elegans genetics, the authors identify an enormous set of mutations within subunits of the AP-2 complex during an fcho mutant suppressor screen.
The enormous variability of mutations, combined with the fact that more than half of these occur even before the cancer phenotype is established, leads to an elevated " noise to signal" ratio in the exon sequencing data [ 26, 27].
Correlating the enormous number of mutations reported earlier with the structure of binding cavity has not been quick and easy, especially because GTT is a bi-substrate enzyme (donor substrate and acceptor substrate) plus the fact that the acceptor site is not well defined till now.
Therefore, knowledge of the potential for nucleotide clusters to predispose some genomic sites to spontaneous mutation offers enormous benefit in the study of viral and bacterial mutation leading to drug resistance as well as the identification of potential pre-cancerous genetic lesions and genomic instability leading to human developmental diseases.
Although sequencing of complete genomes now becomes available, discriminating causal mutations from the enormous amounts of background variation remains a major challenge.
The enormous variability of the mutations combined with the fact that more than 50%% of mutations occur in the cell before the cancer phenotype is established introduces a high noise to signal into genome and/or exon sequencing that confounds the interpretation of data [30, 31].
Two recurrent tumors treated with temozolomide (TMZ) had an enormous number of somatic mutations with a characteristic signature and were considered to be TMZ-induced hypermutators (Fig. 5a 13.
