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expand all sections collapse all sections Oryza sativa gene "ESP2" (GR:0060302)
Species Oryza sativa (Rice) [ GR_tax:013681 ]
Accession GR:0060302
Gene Symbol ESP2
Gene Name ENDOSPERM STORAGE PROTEIN 2 
Synonyms (5)
E.C. Numbers (0)
Pathway Reactions (0)
Chromosome No. 11
Gene Type Not sequenced
Has Phenotype yes
Description Staining intensity of 57-kD glutelin precursor polypeptide of seed storage protein is higher than that of original cultivar. Rice storage proteins accumulate as two types of protein bodies in the starchy endosperm. Rice prolamine is stored in protein body type I (PB-I, spherical proteinaceous particles of lamellar structure). Rice glutelin is deposited in protein body type II (PB-II, a uniformly electron dense structure, 2-3 micron diameter). In SDS-PAGE analysis, PB-I has 10-kDa, 13a (a larger component of 13 kDa), 13b (a smaller component of 13 kDa) and 16-kDa polypeptides; and polypeptides of PB-II are 22-23 kDa, 26 kDa and 37-39 kDa. Based on EM observation esp2 mutation is thought to result in deposition of 57-kD glutelin precursor polypeptides in PB-I and that esp2 is a gene for the post-translational processing of glutelin and for directing the glutelin precursors toward the protein vacuole.
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