Statistical Methods for Identifying Conserved Residues in Multiple Sequence Alignment

Verfasser / Beitragende:
[Virpi Ahola, Tero Aittokallio, Esa Uusipaikka, Mauno Vihinen]
Ort, Verlag, Jahr:
2004
Enthalten in:
Statistical Applications in Genetics and Molecular Biology, 3/1(2004-10-30), 1-28
Format:
Artikel (online)
ID: 378925962
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024 7 0 |a 10.2202/1544-6115.1074  |2 doi 
035 |a (NATIONALLICENCE)gruyter-10.2202/1544-6115.1074 
245 0 0 |a Statistical Methods for Identifying Conserved Residues in Multiple Sequence Alignment  |h [Elektronische Daten]  |c [Virpi Ahola, Tero Aittokallio, Esa Uusipaikka, Mauno Vihinen] 
520 3 |a The assessment of residue conservation in a multiple sequence alignment is a central issue in bioinformatics. Conserved residues and regions are used to determine structural and functional motifs or evolutionary relationships between the sequences of a multiple sequence alignment. For this reason, residue conservation is a valuable measure for database and motif search or for estimating the quality of alignments. In this paper, we present statistical methods for identifying conserved residues in multiple sequence alignments. While most earlier studies examine the positional conservation of the alignment, we focus on the detection of individual conserved residues at a position. The major advantages of multiple comparison methods originate from their ability to select conserved residues simultaneously and to consider the variability of the residue estimates. Large-scale simulations were used for the comparative analysis of the methods. Practical performance was studied by comparing the structurally and functionally important residues of Src homology 2 (SH2) domains to the assignments of the conservation indices. The applicability of the indices was also compared in three additional protein families comprising different degrees of entropy and variability in alignment positions. The results indicate that statistical multiple comparison methods are sensitive and reliable in identifying conserved residues. 
540 |a ©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston 
690 7 |a Computational Biology/Bioinformatics  |2 nationallicence 
690 7 |a Protein sequence analysis  |2 nationallicence 
690 7 |a residue conservation  |2 nationallicence 
690 7 |a conservation index  |2 nationallicence 
690 7 |a multiple comparison  |2 nationallicence 
690 7 |a SH2 domain  |2 nationallicence 
700 1 |a Ahola  |D Virpi  |u University of Turku  |4 aut 
700 1 |a Aittokallio  |D Tero  |u University of Turku  |4 aut 
700 1 |a Uusipaikka  |D Esa  |u University of Turku  |4 aut 
700 1 |a Vihinen  |D Mauno  |u University of Tampere  |4 aut 
773 0 |t Statistical Applications in Genetics and Molecular Biology  |d De Gruyter  |g 3/1(2004-10-30), 1-28  |q 3:1<1  |1 2004  |2 3  |o sagmb 
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950 |B NATIONALLICENCE  |P 700  |E 1-  |a Ahola  |D Virpi  |u University of Turku  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Aittokallio  |D Tero  |u University of Turku  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Uusipaikka  |D Esa  |u University of Turku  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Vihinen  |D Mauno  |u University of Tampere  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Statistical Applications in Genetics and Molecular Biology  |d De Gruyter  |g 3/1(2004-10-30), 1-28  |q 3:1<1  |1 2004  |2 3  |o sagmb 
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