GRASP [Genomic Resource Access for Stoichioproteomics]: Comparative explorations of the atomic content of 12 Drosophila proteomes
Genre
Journal ArticleDate
2013-09-04Author
Gilbert, JDJAcquisti, C
Martinson, HM
Elser, JJ
Kumar, S
Fagan, WF
Subject
BioinformaticsComparative-phylogenetic analysis
Ecological stoichiometry
Material costs
Nutrient limitation
Proteomics
Permanent link to this record
http://hdl.handle.net/20.500.12613/5374
Metadata
Show full item recordDOI
10.1186/1471-2164-14-599Abstract
Background: " Stoichioproteomics" relates the elemental composition of proteins and proteomes to variation in the physiological and ecological environment. To help harness and explore the wealth of hypotheses made possible under this framework, we introduce GRASP (http://www.graspdb.net), a public bioinformatic knowledgebase containing information on the frequencies of 20 amino acids and atomic composition of their side chains. GRASP integrates comparative protein composition data with annotation data from multiple public databases. Currently, GRASP includes information on proteins of 12 sequenced Drosophila (fruit fly) proteomes, which will be expanded to include increasingly diverse organisms over time. In this paper we illustrate the potential of GRASP for testing stoichioproteomic hypotheses by conducting an exploratory investigation into the composition of 12 Drosophila proteomes, testing the prediction that protein atomic content is associated with species ecology and with protein expression levels.Results: Elements varied predictably along multivariate axes. Species were broadly similar, with the D. willistoni proteome a clear outlier. As expected, individual protein atomic content within proteomes was influenced by protein function and amino acid biochemistry. Evolution in elemental composition across the phylogeny followed less predictable patterns, but was associated with broad ecological variation in diet. Using expression data available for D. melanogaster, we found evidence consistent with selection for efficient usage of elements within the proteome: as expected, nitrogen content was reduced in highly expressed proteins in most tissues, most strongly in the gut, where nutrients are assimilated, and least strongly in the germline.Conclusions: The patterns identified here using GRASP provide a foundation on which to base future research into the evolution of atomic composition in Drosophila and other taxa. © 2013 Gilbert et al.; licensee BioMed Central Ltd.Citation to related work
Springer Science and Business Media LLCHas part
BMC GenomicsADA compliance
For Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.eduae974a485f413a2113503eed53cd6c53
http://dx.doi.org/10.34944/dspace/5356