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Functionality of system components: conservation of protein function in protein feature space

Item Type:Article
Title:Functionality of system components: conservation of protein function in protein feature space
Creators Name:Jensen, L.J. and Ussery, D.W. and Brunak, S.
Abstract:Many protein features useful for prediction of protein function can be predicted from sequence, including posttranslational modifications, subcellular localization, and physical/chemical properties. We show here that such protein features are more conserved among orthologs than paralogs, indicating they are crucial for protein function and thus subject to selective pressure. This means that a function prediction method based on sequence-derived features may be able to discriminate between proteins with different function even when they have highly similar structure. Also, such a method is likely to perform well on organisms other than the one on which it was trained. We evaluate the performance of such a method, ProtFun, which relies on protein features as its sole input, and show that the method gives similar performance for most eukaryotes and performs much better than anticipated on archaea and bacteria. From this analysis, we conclude that for the posttranslational modifications studied, both the cellular use and the sequence motifs are conserved within Eukarya.
Keywords:Amino Acid Sequence, Amino Acid Sequence Homology, Computational Biology, Conserved Sequence, Predictive Value of Tests, Proteins, Software Validation, Species Specificity, Structure-Activity Relationship, Tertiary Protein Structure, Animals
Source:Genome Research
Publisher:Cold Spring Harbor Laboratory Press (U.S.A.)
Page Range:2444-2449
Date:November 2003
Official Publication:https://doi.org/10.1101/gr.1190803
PubMed:View item in PubMed

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