Mississippi State University
Jenkins, Johnie N.
Date of Degree
Graduate Thesis - Open Access
Master of Science
Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology
The ubiquitin-proteasome proteolysis pathway is responsible for the degradation of abnormal and short-lived proteins to regulate many important biochemical activities in eukaryotes. By employing affymetrix microarray analysis, we have identified a novel ubiquitin ligase E3 gene GhRING2 that is expressed differentially between two G. hirsutum lines - Texas Marker-1 and Chromosome Substitution Line CS-B25. The complete GhRING2 gene sequence was obtained by genomic and cDNA walking. The expression of GhRING2 in cotton fiber is developmentally regulated, suggesting that the ubiquitin-proteasome pathway may regulate cotton fiber growth and development. Using a yeast two-hybrid assay GhRING2 was found to interact with a PROTODERMAL FACTOR1 (GhPDF1) protein. GhPDF1 is expressed preferentially in immature ovules and fiber initials and the gene has been suggested to play a role in cell fate determination and fiber development. Pull down and plasmid swap assays were employed to confirm this interaction.
Soma, Shiva Theja Reddy, "Characterization of a Novel RING-type Ubiquitin E3 Ligase GhRING2 involved in Cotton Fiber Development" (2013). Theses and Dissertations. 1001.