Analysis of Simple Sequence Repeats in Mammalian Cell Cycle Genes

Author(s): Seema Trivedi, Christopher Wills, David Metzgar.

Journal Name:Recent Advances in DNA & Gene Sequences (Discontinued)

Volume 8 , Issue 1 , 2014

Abstract:

Simple sequence repeats (SSRs), or microsatellites are hyper-mutable and can lead to disorders. Here we explore SSR distribution in cell cycle-associated genes [grouped into: checkpoint; regulation; replication, repair, and recombination (RRR); and transition] in humans and orthologues of eight mammals. Among the gene groups studied, transition genes have the highest SSR density. Trinucleotide repeats are not abundant and introns have higher repeat density than exons. Many repeats in human genes are conserved; however, CG motifs are conserved only in regulation genes. SSR variability in cell cycle genes represents a genetic Achilles’ heel, yet SSRs are common in all groups of genes. This tolerance many be due to i) positions in introns where they do not disrupt gene function, ii) essential roles in regulation, iii) specific value of adaptability, and/or iv) lack of negative selection pressure. Present study may be useful for further exploration of their medical relevance and potential functionality.

Keywords: Cell cycle, checkpoint, microsatellites, replication, repair, recombination, simple sequence repeats (SSRs), transition.

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Article Details

VOLUME: 8
ISSUE: 1
Year: 2014
Page: [20 - 29]
Pages: 10
DOI: 10.2174/2352092208666141013230604
Price: $58