Gayler K R, Sykes G E
Russell Grimwade School of Biochemistry, University of Melbourne, Parkville, Victoria 3052, Australia.
Plant Physiol. 1985 Jul;78(3):582-5. doi: 10.1104/pp.78.3.582.
The effects of sulfur deficiency on the complement of proteins laid down in developing seeds of soybean (Glycine max L. Merr) have been examined. Sulfur deficiency caused a 40% decrease in the level of glycinins and a contrasting elevation in the level of beta-conglycinins. The subunit composition of these proteins was also affected. There was in particular a 3-fold increase in the beta-subunit of beta-conglycinins in the sulfur-deficient seeds, and this accumulated largely as the B(0)-isomer of beta-conglycinins, a protein which while virtually devoid of methionine and cysteine retains the physical properties of a normal 7S storage protein. These data demonstrate that a high degree of selectivity can be exerted by environmental stress over the accumulation of proteins in developing seeds.
研究了硫缺乏对大豆（Glycine max L. Merr）发育种子中积累的蛋白质组成的影响。硫缺乏导致大豆球蛋白水平下降40%，同时β-伴大豆球蛋白水平相应升高。这些蛋白质的亚基组成也受到影响。特别是，硫缺乏种子中β-伴大豆球蛋白的β-亚基增加了3倍，并且主要以β-伴大豆球蛋白的B(0)-异构体形式积累，这种蛋白质几乎不含蛋氨酸和半胱氨酸，但保留了正常7S贮藏蛋白的物理性质。这些数据表明，环境胁迫对发育种子中蛋白质的积累具有高度的选择性。
