Journal article
Comparative analysis of predicted plastid-targeted proteomes of sequenced higher plant genomes
PloS one, Vol.9(11), pp.e112870-e112870
2014
Handle:
https://hdl.handle.net/2376/110474
PMCID: PMC4231079
PMID: 25393533
Abstract
Plastids are actively involved in numerous plant processes critical to growth, development and adaptation. They play a primary role in photosynthesis, pigment and monoterpene synthesis, gravity sensing, starch and fatty acid synthesis, as well as oil, and protein storage. We applied two complementary methods to analyze the recently published apple genome (Malus × domestica) to identify putative plastid-targeted proteins, the first using TargetP and the second using a custom workflow utilizing a set of predictive programs. Apple shares roughly 40% of its 10,492 putative plastid-targeted proteins with that of the Arabidopsis (Arabidopsis thaliana) plastid-targeted proteome as identified by the Chloroplast 2010 project and ∼57% of its entire proteome with Arabidopsis. This suggests that the plastid-targeted proteomes between apple and Arabidopsis are different, and interestingly alludes to the presence of differential targeting of homologs between the two species. Co-expression analysis of 2,224 genes encoding putative plastid-targeted apple proteins suggests that they play a role in plant developmental and intermediary metabolism. Further, an inter-specific comparison of Arabidopsis, Prunus persica (Peach), Malus × domestica (Apple), Populus trichocarpa (Black cottonwood), Fragaria vesca (Woodland Strawberry), Solanum lycopersicum (Tomato) and Vitis vinifera (Grapevine) also identified a large number of novel species-specific plastid-targeted proteins. This analysis also revealed the presence of alternatively targeted homologs across species. Two separate analyses revealed that a small subset of proteins, one representing 289 protein clusters and the other 737 unique protein sequences, are conserved between seven plastid-targeted angiosperm proteomes. Majority of the novel proteins were annotated to play roles in stress response, transport, catabolic processes, and cellular component organization. Our results suggest that the current state of knowledge regarding plastid biology, preferentially based on model systems is deficient. New plant genomes are expected to enable the identification of potentially new plastid-targeted proteins that will aid in studying novel roles of plastids.
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Details
- Title
- Comparative analysis of predicted plastid-targeted proteomes of sequenced higher plant genomes
- Creators
- Scott Schaeffer - Department of Horticulture, Washington State University, Pullman, WA, United States of America; Molecular Plant Science Graduate Program, Washington State University, Pullman, WA, United States of AmericaArtemus Harper - Department of Horticulture, Washington State University, Pullman, WA, United States of AmericaRajani Raja - 2082 Cordley Hall, Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, United States of AmericaPankaj Jaiswal - 2082 Cordley Hall, Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR, United States of AmericaAmit Dhingra - Department of Horticulture, Washington State University, Pullman, WA, United States of America; Molecular Plant Science Graduate Program, Washington State University, Pullman, WA, United States of America
- Publication Details
- PloS one, Vol.9(11), pp.e112870-e112870
- Academic Unit
- Horticulture, Department of
- Publisher
- United States
- Grant note
- T32 GM008336 / NIGMS NIH HHS
- Identifiers
- 99900547522801842
- Language
- English
- Resource Type
- Journal article