Arachis hypogaea
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1212195 | ENA |
REPOSITORIES: ENA
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Project description:The activities of a cationic (C.PRX) and an anionic peroxidase isolated from peanut (Arachis hypogaea)-cell suspension culture were drastically reduced when they were deglycosylated with glycopeptidase F or oxidized by 10 mM-periodate. In contrast with the controls, the deglycosylated or the oxidized peroxidases were much more susceptible to proteolytic degradation. In radiolabelling experiments with [35S]methionine, the non-glycosylated C.PRX was synthesized in the tunicamycin-treated cultures and secreted into the medium. Examination of the C.PRX polypeptides by SDS/polyacrylamide-gel electrophoresis followed by fluorography showed that the non-glycosylated form had an Mr of approx. 31,000, which is about 78% of that of the glycosylated form. Our results suggest that carbohydrates may not be essential for peroxidase secretion, but that stabilization of the peroxidase molecules and acquisition by these isoenzymes of a catalytically active conformation is linked directly or indirectly to glycosylation.
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Project description:The advent of the genome sequences of Arachis duranensis and Arachis ipaensis has ushered in a new era for peanut genomics. With the goal of producing a gene atlas for cultivated peanut (Arachis hypogaea), 22 different tissue types and ontogenies that represent the full development of peanut were sequenced, including a complete reproductive series from flower to peg elongation and peg tip immersion in the soil to fully mature seed. Using a genome-guided assembly pipeline, a homeolog-specific transcriptome assembly for Arachis hypogaea was assembled and its accuracy was validated. The assembly was used to annotate 21 developmental co-expression networks as tools for gene discovery. Using a set of 8816 putative homeologous gene pairs, homeolog expression bias was documented, and although bias was mostly balanced, there were striking differences in expression bias in a tissue-specific context. Over 9000 alterative splicing events and over 6000 non-coding RNAs were further identified and profiled in a developmental context. Together, this work represents a major new resource for cultivated peanut and will be integrated into peanutbase.org as an available resource for all peanut researchers.
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