The KIPS Transactions:PartA (정보처리학회논문지A)

Korea Information Processing Society (한국정보처리학회)
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A Gene Clustering Method with Hierarchical Visualization of Alignment Pairs

계층적 정렬쌍 가시화를 이용한 유전자 클러스터 탐색 알고리즘

  • Published : 2009.06.30
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Abstract

One of the main issues in comparative genomics is to study chromosomal gene order in one or more related species. For this purpose, the whole genome alignment is usually applied to find the horizontal gene transfer, gene duplication, and gene loss between two related genomes. Also it is well known that the novel visualization tool with whole genome alignment is greatly useful for us to understand genome organization and evolution process. There are a lot of algorithms and visualization tools already proposed to find the "gene clusters" on genome alignments. But due to the huge size of whole genome, the previous visualization tools are not convenient to discover the relationship between two genomes. In this paper, we propose AlignScope, a novel visualization system for whole genome alignment, especially useful to find gene clusters between two aligned genomes. This AlignScope not only provides the simplified structure of genome alignment at any simplified level, but also helps us to find gene clusters. In experiment, we show the performance of AlignScope with several microbial genomes such as B. subtilis, B.halodurans, E. coli K12, and M. tuberculosis H37Rv, which have more than 5000 alignment pairs (matched DNA subsequence).

최근 생물정보학 분야의 연구는 하나하나의 유전자를 연구하던 예전의 방법에서 유전자들간의 관계를 알아보는 연구들로 변해가고 있다. 이러한 유전자들 간의 연구 중 하나가 유전자 팀(gene team)을 연구하는 것이다. 유전자 팀이란 몇몇 염색체들 사이의 유전자들이 보존되어 있는 것을 말하며, 닫힌 영역 안에 보존되어 있는 유전자들의 집합으로 볼 수 있다. 이들은 진화과정을 거치면서, 유전자 팀 내의 유전자들의 위치나 그 종류가 변한다. 이러한 유전자 팀을 찾기 위해 많은 연구들이 이루어져왔다. 본 논문은 생물정보학 분야에서 많이 사용되는 계층적 클러스터링(hierarchical clustering)방법을 변형하여 전체 유전체(whole genome) 쌍내에서의 의미 있는 영역을 찾고, 영역 내에서 gene team을 찾을 수 있는 방법을 소개한다. 본 연구 방법을 이용하면, 복잡한 구조의 두 유전체 사이의 연관 유전자들이나 유사 영역들의 맵(map)을 단계별로 간략화 하여 나타낼 수 있다.

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