The Journal of the Korea Contents Association (한국콘텐츠학회논문지)

The Korea Contents Association (한국콘텐츠학회)
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Epigenetic Characterization of Aging Related Genes

노화 관련 유전자의 후성유전학적 특성 분석

  • Received : 2013.07.09
  • Accepted : 2013.08.02
  • Published : 2013.08.31
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Abstract

Gene expression is regulated by a wide range of mechanisms at the DNA sequence level. In addition, gene expression is also regulated by epigenetic mechanisms through DNA methylation, histone modification, and ncRNA. To understand the regulation of gene expression at the epigenetic level, we constructed aging related gene database and analyzed epigenetic properties that are focused on DNA methylation. The DNA methylation of promoter or upstream region of the genes induces to repress the gene expression. We compared and analyzed distribution between whole human genes and aging related genes in the epigenetic properties such as CGI distribution, methylation motif pattern, and TFBS (transcription factor binding site) distribution. In contrast to methylation motif pattern, CGI and TFBS distributions are positively correlated with epigenetic regulation of aging related gene expression. In this study, the epigenetic data about DNA methylation of the aging genes will provide us to understand phenomena of the aging and epigenetic mechanism for regulation of aging related genes.

유전자 염기서열의 직접적인 변화 대신 염기의 수정 또는 변형을 통해 유전자 발현이 조절되는 후성유전은 크게 DNA 메틸화(methylation), 히스톤 변형(modification), ncRNA(non-coding RNA)에 의해 제어가 가능하다. 본 연구에서는 후성유전을 이해하기 위해 노화 관련 유전자를 대상으로 데이터베이스를 구축하고, DNA 메틸화를 중심으로 후성 유전학적 특성을 분석하였다. 유전자의 upstream 부위와 프로모터(promoter) 부위에 있는 CpG island(CGI)에 메틸화가 될 경우 유전자 발현을 억제하기 때문에 CGI를 중심으로 전체 유전자 그룹과 노화 관련 유전자 그룹간의 분포도를 비교 분석하였다. 또한 메틸화와 관련된 CGI로부터 얻은 메틸화 관련 motif 패턴을 이용하여 노화 유전자와의 관계를 분석하였다. 노화 관련 유전자의 CGI 분포는 전사인자 결합자리의 분포와 일치하였다. 본 연구에서 제공하는 DNA 메틸화 중심의 후성유전학적 정보는 노화 관련 유전자의 조절과 노화를 이해하는데 도움이 될 것으로 사료된다.

Keywords

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