多重序列比對
多重序列比對(Multiple sequence alignment;MSA)是對三個以上的生物學序列(biological sequence),如蛋白質序列、DNA序列或RNA序列所作的序列比對。一般來說,是輸入一組假定擁有演化關係的序列。從MSA的結果可推導出序列的同源性,而種系發生關係也可引導出這些序列共同的演化始祖。如右圖般的視覺化敘述可描繪出各種突變事件,例如點突變的單格變化,或是如刪除突變與插入突變,可使各個序列之間產生鴻溝。MSA常用來研究序列的保守性,或是蛋白質結構域的三級結構與二級結構,甚至是個別的氨基酸或核苷酸。
參見
編輯外部連結
編輯- ExPASy sequence alignment tools (頁面存檔備份,存於互聯網檔案館)
- Multiple Alignment Resource Page from the Virtual School of Natural Sciences
- Tools for Multiple Alignments from Pôle Bioinformatique Lyonnais
- Multiple sequence alignment lectures(頁面存檔備份,存於互聯網檔案館) from the Max Planck Institute for Molecular Genetics
相關文獻
編輯- Duret, L.; S. Abdeddaim. Multiple alignment for structural functional or phylogenetic analyses of homologous sequences. D. Higgins and W. Taylor (編). Bioinformatics sequence structure and databanks. Oxford: Oxford University Press. 2000.
- Notredame, C. Recent progresses in multiple sequence alignment: a survey. Pharmacogenomics. 2002, 31 (1): 131 –– 144.
- Thompson, J. D.; F. Plewniak and O. Poch. A comprehensive comparison of multiple sequence alignment programs. Nucleic Acids Research. 1999, 27 (13): 12682––2690.
- Wallace, I.M.; Blackshields G and Higgins DG. Multiple sequence alignments. Curr Opin Struct Biol. 2005, 15 (3): 261–6.