Plastidial Localization of a Potato ‘Nudix’ Hydrolase of ADP-glucose Linked to Starch Biosynthesis
نویسندگان
چکیده
منابع مشابه
Most of ADP x glucose linked to starch biosynthesis occurs outside the chloroplast in source leaves.
Sucrose and starch are end products of two segregated gluconeogenic pathways, and their production takes place in the cytosol and chloroplast of green leaves, respectively. According to this view, the plastidial ADP.glucose (ADPG) pyrophosphorylase (AGP) is the sole enzyme catalyzing the synthesis of the starch precursor molecule ADPG. However, a growing body of evidences indicates that starch ...
متن کاملADP-Glucose Transport by the Chloroplast Adenylate Translocator Is Linked to Starch Biosynthesis.
In organello starch biosynthesis was studied using intact chloroplasts isolated from spinach leaves (Spinacia oleracea). Immunoblot analysis using a specific antiserum against the mitochondrial adenylate (ADP/ATP) translocator of Neurospora crassa shows the presence of an adenylate translocator protein in the chloroplast envelope membranes, similar to that existing in mitochondria and amyloplas...
متن کاملADP - Glucose Transport by the Chloroplast Adenylate Translocator Is Linked to Starch Biosynthesis 1
In organello starch biosynthesis was studied using intact chloroplasts isolated from spinach leaves (Spinacia oleracea). Immunoblot analysis using a specific antiserum against the mitochondrial adenylate (ADP/ATP) translocator of Neurospora crassa shows the presence of an adenylate translocator protein in the chloroplast envelope membranes, similar to that existing in mitochondria and amyloplas...
متن کاملAdenosine diphosphate glucose pyrophosphatase: A plastidial phosphodiesterase that prevents starch biosynthesis.
A distinct phosphodiesterasic activity (EC 3.1.4) was found in both mono- and dicotyledonous plants that catalyzes the hydrolytic breakdown of ADPglucose (ADPG) to produce equimolar amounts of glucose-1-phosphate and AMP. The enzyme responsible for this activity, referred to as ADPG pyrophosphatase (AGPPase), was purified over 1,100-fold from barley leaves and subjected to biochemical character...
متن کاملRegulation of Adp-glucose Pyrophosphorylase Subunit Expression –-a Key Enzyme for Starch Biosynthesis in Plants
INTRODUCTION Starch is the predominant carbon sink of storage organs and leaves of many plants. Substantial evidence from the analysis of starch-deficient mutants, transgenic plants, and enzyme kinetics suggest that ADP-glucose pyrophosphorylase (AGPase) catalyzes a key step for starch biosynthesis in both photosynthetic and nonphotosynthetic tissues. Fruit quality in tomato is largely a functi...
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 and Cell Physiology
سال: 2008
ISSN: 1471-9053,0032-0781
DOI: 10.1093/pcp/pcn145