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PMID: 17293439 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

F-box proteins in rice. Genome-wide analysis, classification, temporal and spatial gene expression during panicle and seed development, and regulation by light and abiotic stress.

Plant physiology ·Vol. 143 ·No. 4 ·2007-04-00 ·Pages 1467-83

Jain M, Nijhawan A, Arora R, Agarwal P, Ray S, Sharma P, Kapoor S, Tyagi AK, Khurana JP

Abstract

F-box proteins constitute a large family in eukaryotes and are characterized by a conserved F-box motif (approximately 40 amino acids). As components of the Skp1p-cullin-F-box complex, F-box proteins are critical for the controlled degradation of cellular proteins. We have identified 687 potential F-box proteins in rice (Oryza sativa), the model monocotyledonous plant, by a reiterative database search. Computational analysis revealed the presence of several other functional domains, including leucine-rich repeats, kelch repeats, F-box associated domain, domain of unknown function, and tubby domain in F-box proteins. Based upon their domain composition, they have been classified into 10 subfamilies. Several putative novel conserved motifs have been identified in F-box proteins, which do not contain any other known functional domain. An analysis of a complete set of F-box proteins in rice is presented, including classification, chromosomal location, conserved motifs, and phylogenetic relationship. It appears that the expansion of F-box family in rice, in large part, might have occurred due to localized gene duplications. Furthermore, comprehensive digital expression analysis of F-box protein-encoding genes has been complemented with microarray analysis. The results reveal specific and/or overlapping expression of rice F-box protein-encoding genes during floral transition as well as panicle and seed development. At least 43 F-box protein-encoding genes have been found to be differentially expressed in rice seedlings subjected to different abiotic stress conditions. The expression of several F-box protein-encoding genes is also influenced by light. The structure and function of F-box proteins in plants is discussed in light of these results and the published information. These data will be useful for prioritization of F-box proteins for functional validation in rice.

MeSH Terms
Chromosome Mapping F-Box Proteins/classification,genetics,physiology Gene Expression Regulation, Plant/physiology,radiation effects Genome, Plant Light Oryza/embryology,genetics Phylogeny Polymerase Chain Reaction Seeds/growth & development
Chemicals
F-Box Proteins
Authors & Affiliations
9 authors, click to expand affiliations / ORCID
Jain Mukesh
Interdisciplinary Centre for Plant Genomics and Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi 110 021, India.
Nijhawan Aashima
Arora Rita
Agarwal Pinky
Ray Swatismita
Sharma Pooja
Kapoor Sanjay
Tyagi Akhilesh K
Khurana Jitendra P
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Article Info
Journal
Plant physiology
Abbr.
Plant Physiol
ISSN
0032-0889
DOI
10.1104/pp.106.091900
Published
2007-04-00
Epub
2007-00-09
Pages
1467-83
Language
English
Region
United States
NLM ID
0401224
PMCID
PMC1851844
Subset
IM
Databases
GEO
GSE6893, GSE6901
External Links
PubMed source DOI: 10.1104/pp.106.091900 PMC Full Text View journal details
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