期刊
PROTEIN ENGINEERING
卷 13, 期 8, 页码 545-550出版社
OXFORD UNIV PRESS
DOI: 10.1093/protein/13.8.545
关键词
alignment accuracy; protein evolution; sequence alignment; structure alignment; substitution matrix
Sequence alignment is a standard method to infer evolutionary, structural, and functional relationships among sequences. The quality of alignments depends on the substitution matrix used. Here we derive matrices based on superimpositions from protein pairs of similar structure, but of low or no sequence similarity. In a performance test the matrices are compared with 12 other previously published matrices. It is found that the structure-derived matrices are applicable for comparisons of distantly related sequences. We investigate the influence of evolutionary relationships of protein pairs on the alignment accuracy.
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