374x Filetype PPTX File size 1.10 MB Source: fenyolab.org
Multiple
Alignment
Stuart M. Brown
NYU School of Medicine
Learning Objectives
Understand the need for multiple alignment
methods in biology
Optimal methods (dynamic programming) are
not practical to align many sequences
Progressive pairwise approach
Profile alignments
Editing alignments
Sequence Logos
Reasons for aligning
sets of sequences
Organize data to reflect sequence homology
Estimate evolutionary distance
Infer phylogenetic trees from homologous sites
Highlight conserved sites/regions (motifs)
Highlight variable sites/regions
Uncover changes in gene structure
Look for evidence of selection
Summarize information
Pairwise Alignment
The alignment of two sequences (DNA or
protein) is a relatively straightforward
computational problem.
The best solution seems to be an approach
called Dynamic Programming.
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