4.5 Article

Epigenomics and the concept of degeneracy in biological systems

期刊

BRIEFINGS IN FUNCTIONAL GENOMICS
卷 13, 期 3, 页码 191-202

出版社

OXFORD UNIV PRESS
DOI: 10.1093/bfgp/elt050

关键词

epigenetic code; pluripotentiality; robustness; redundancy; DNA methylation; histone modifications; social insect; honey bee

资金

  1. Australian Research Council [DP1092706]
  2. National Health and Medical Research Council [APP1050593]
  3. ARC [DP12010180]
  4. Australian Research Council [DP1092706] Funding Source: Australian Research Council

向作者/读者索取更多资源

Researchers in the field of epigenomics are developing more nuanced understandings of biological complexity, and exploring the multiple pathways that lead to phenotypic expression. The concept of degeneracy-referring to the multiple pathways that a system recruits to achieve functional plasticity-is an important conceptual accompaniment to the growing body of knowledge in epigenomics. Distinct from degradation, redundancy and dilapidation; degeneracy refers to the plasticity of traits whose function overlaps in some environments, but diverges in others. While a redundant system is composed of repeated identical elements performing the same function, a degenerate system is composed of different elements performing similar or overlapping functions. Here, we describe the degenerate structure of gene regulatory systems from the basic genetic code to flexible epigenomic modifications, and discuss how these structural features have contributed to organism complexity, robustness, plasticity and evolvability.

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