by Swedish University of Agricultural Sciences, Uppsala Genetic Center, Dept. of Cell Research in Uppsala, Sweden .
Written in English
|Statement||by Hans-Olof Gustavsson.|
|The Physical Object|
|Pagination||1 v. (various pagings) :|
The synthesis of storage proteins is primarily controlled at transcriptional level and seed-specific expression has been shown to be conferred upon the promoter regions of many storage protein genes. Napin is one of the main storage proteins in rapeseed ' s embryo that is produced in seed developing :// The seeds of B. napus contain around 45% oil and 25% seed storage proteins (SSPs), which are predominantly composed of cruciferin (60%), napin (20%) and other minor proteins such as oleosins and lipid transfer proteins (Gehrig et al., ). When compared to soybean and legumes, the protein of rapeseed contains an excellent balance of essential The B3-domain transcription factor ABI3 is a major regulator of gene expression of seed maturation during Arabidopsis embryogenesis. The napA gene encodes for a Brassica napus 2S storage protein specifically expressed in the embryo during the early and mid-maturation phase (MAT program).The napA promoter contains two essential cis-sequences; the B-box, which functions as an Abscisic acid :oai::uu?language=en. The expression of seed storage proteins is under tight developmental regulation and represents a powerful model system to study the regulation of gene expression during plant development. In this study, we show that three homologous B3 type transcription factors regulate the model storage protein gene, At2S3, via two distinct mechanisms: FUSCA3 (FUS3) and LEAFY COTYLEDON2 (LEC2) activate the
Seed Storage Proteins are synthesized at high levels in specific tissues and at certain stages of development. named after those of Brassica napus. 12S globulin proteins are referred to as cruciferin, whereas the 2S albumins are referred to as either napin or :// Svendsen I, Nicolova D, Goshev I, Genov N () Isolation and characterization of a trypsin inhibitor from the seeds of kohlrabi (Brassica napus var. Rapifera) belonging to the napin family of storage proteins. Carlsberg Res Commun – PubMed CrossRef Google Scholar In the seed of oilseed rape/canola (Brassica napus), storage parenchyma cells are responsible for the synthesis of triacylglycerols (TAGs), deposited in the form of lipid droplets (Chapman et al., ), while the major seed storage proteins cruciferin and napin are deposited in large storage Previous studies have shown that ectopic expression of ABI3 driven by the cauliflower mosaic virus (CaMV) 35S promoter in vegetative tissues resulted in ectopic expression of the At2S and CRC seed storage protein genes in an ABA-dependent manner (Parcy et al. ).
Napin ( S protein) is a basic, low molecular weight storage protein synthesized in rapeseed (Brassica na- pus) embryos during seed development. Napin is com- posed of two polypeptide chains with molecular weights of and that are held together by disulfide Structure of a gene encoding the S storage protein, napin, from Brassica napus Article (PDF Available) in Journal of Biological Chemistry (25) October with 80 Reads Seed storage proteins play a fundamental role in plant reproduction and human nutrition. They accumulate during seed development as reserve material for germination and seedling growth and are a major source of dietary protein for human consumption. Storage proteins encompass multiple isoforms encoded by multi-gene families that undergo abundant glycosylations and :// Seed reserves comprise starch, lipids in the form of triacylglycerol (TAG) and specialised seed storage proteins (SSPs), but the relative proportions differ considerably between species (Baud et al., ). In oilseed plants, such as Arabidopsis, TAG is the most abundant storage reserve but the endosperm and embryo of Arabidopsis seeds also