Microsomal Phosphatidate Phosphatase in Maturing Safflower Seeds
نویسندگان
چکیده
منابع مشابه
Diacylglycerol acyltransferase in maturing sunflower seeds.
Developing sunflower seeds exhibit a high diacylglycerol acyltransferase (DAGAT, EC 2.3.1.20) activity. The distribution of the enzyme has been studied in subcellular fractions prepared by differential centrifugation of seed homogenate. Its activity was characterized using [1-(14)C]oleoyl-CoA and diolein dispersed in Tween 20. Some properties of the microsomal fraction of DAGAT were investigate...
متن کاملRoles of phosphatidate phosphatase enzymes in lipid metabolism.
Phosphatidate phosphatase (PAP) enzymes catalyze the dephosphorylation of phosphatidate, yielding diacylglycerol and inorganic phosphate. In eukaryotic cells, PAP activity has a central role in the synthesis of phospholipids and triacylglycerol through its product diacylglycerol, and it also generates and/or degrades lipid-signaling molecules that are related to phosphatidate. There are two typ...
متن کاملCessation of assimilate uptake in maturing soybean seeds.
In vitro assimilate uptake and metabolism were evaluated in embryos of known age isolated from seeds at mid-podfilling through physiological maturity. The capacity of isolated Wye soybean embryos to take up exogenous [(14)C]sucrose dropped nearly 4-fold in less than 1 week at incipient cotyledon yellowing. This drop in rate of sucrose uptake coincided with cessation of seed growth as well as ra...
متن کاملAdenylate energy pool and energy charge in maturing rape seeds.
A study of energy state and chemical composition of pod walls and seeds of maturing rape (Brassica napus L.) was conducted on two varieties, Victor and Gorczanski. Total adenosine phosphates, ATP, and adenylate energy charge increased with increasing cell number and cellular synthesis during the early stages, remained high at maximum dry weight accumulation and maximum substrate influx time, an...
متن کاملO-lysophospholipid Acyltransferase from the Microsomes of Developing Safflower Seeds
Acyl-CoA:O-lysophospholipid acyltransferase activity was measured in extracts of developing safflower (Carthamus tinctoriis var. UC-1) seeds. Acyltransferase activity was present in all subcellular fractions. The microsomal acyltransferase activity was solubilized with either 30 mM-noctylglucoside, 1% deoxycholate, or 100 isM lysophosphatidyicholine. The pH optimum of the lysophosphatidylcholin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Plant Physiology
سال: 1989
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.90.2.413