Prediction of enzyme function by combining sequence similarity and protein interactions.

Prediction of enzyme function by combining sequence similarity and protein interactions.
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DOI:
10.1186/1471-2105-9-249
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发表时间:
2008-05-27
期刊:
影响因子:
3
通讯作者:
Oliva B
Oliva B
中科院分区:
生物学4区
文献类型:
--
作者:
Espadaler J;Eswar N;Querol E;Avilés FX;Sali A;Marti-Renom MA;Oliva B

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A number of studies have used protein interaction data alone for protein function prediction. Here, we introduce a computational approach for annotation of enzymes, based on the observation that similar protein sequences are more likely to perform the same function if they share similar interacting partners. The method has been tested against the PSI-BLAST program using a set of 3,890 protein sequences from which interaction data was available. For protein sequences that align with at least 40% sequence identity to a known enzyme, the specificity of our method in predicting the first three EC digits increased from 80% to 90% at 80% coverage when compared to PSI-BLAST. Our method can also be used in proteins for which homologous sequences with known interacting partners can be detected. Thus, our method could increase 10% the specificity of genome-wide enzyme predictions based on sequence matching by PSI-BLAST alone.
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