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Glutamine synthetase
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Glutamine synthetase (EC 6.3.1.2) is an enzyme which assimilates ammonium into amino acids. Therefore, GS plays an essential role in the metabolism of nitrogen. In vascular plants, GS is devided into two groups: cytosol - located isoform (GS1) and plastid – located isoform (GS2). Surveys have shown that GS1 gene was used widely to generate transgenic plants. Effects on the growth characteristics of GS1 transgenic plants have been reported in many researches.
7p
vilarry
01-04-2024
6
1
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Bài viết Tạo cây xoan ta chuyển gen GS1 mã hóa Glutamine synthetase tăng khả năng sử dụng nitrogen nghiên cứu thiết kế vector chuyển gen pBI121 chứa cấu trúc mang gen GS1, cấu trúc được chuyển vào cây xoan ta nhằm đánh giá hiệu quả biểu hiện của vector pBI121:GS1. Kiểm tra nhanh sự có mặt của gen GS1 trong các dòng xoan ta chuyển gen nhận thấy đã có sự tăng cường hiệu quả sử dụng nitrogen.
7p
vimalfoy
08-02-2023
4
1
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Free asparagine is the precursor for acrylamide formation during cooking and processing of grains, tubers, beans and other crop products. In wheat grain, free asparagine, free glutamine and total free amino acids accumulate to high levels in response to sulphur deficiency.
18p
visilicon2711
20-08-2021
13
1
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Nitrogen application can effectively mitigate the damage to crop growth and yield caused by drought. However, the efficiency of heavy nitrogen application before drought (NBD) and heavy nitrogen application after drought (NAD) to regulate rice response to drought stress remains controversial.
17p
vijichea2711
28-05-2021
8
1
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Glutamine synthetase (GS) acts as a key enzyme in plant nitrogen (N) metabolism. It is important to understand the regulation of GS expression in plant. Promoters can initiate the transcription of its downstream gene.
14p
vijichea2711
28-05-2021
8
1
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Early seed germination and a functional root system development during establishment are crucial attributes contributing to nutrient competence under marginal nutrient soil conditions. Chenopodium quinoa Willd (Chenopodiaceae) is a rustic crop, able to grow in marginal areas.
17p
vijichea2711
28-05-2021
15
1
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Cisplatin (CDDP) significantly prolongs survival in various cancers, but many patients also develop resistance that results in treatment failure. Thus, this study aimed to elucidate the underlying mechanisms by which ovarian cancer cells acquire CDDP resistance.
11p
vianrose2711
27-04-2021
9
1
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Glutamine synthetase (GS; EC: 6.3.1.2, L-glutamate: ammonia ligase ADP-forming) is a key enzyme in ammonium assimilation and metabolism in higher plants. In poplar, the GS family is organized in 4 groups of duplicated genes, 3 of which code for cytosolic GS isoforms (GS1.1, GS1.2 and GS1.3) and one group that codes for the choroplastic GS isoform (GS2).
14p
viminato2711
22-05-2020
17
3
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Glutamine synthetase (GS) catalyzes the first step of nitrogen assimilation in plant cell. The main GS are classified as cytosolic GS1 and plastidial GS2, of which the functionality is variable according to the nitrogen sources, organs and developmental stages.
13p
vihashirama2711
21-05-2020
17
1
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In plants, ammonium metabolism is particularly important for converting absorbed nitrogen into amino acids. However, the molecular mechanism underlying this conversion remains largely unknown.
13p
viharuno2711
21-04-2020
8
1
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Nitrogen (N) nutrition significantly affected metabolism and accumulation of quality-related compounds in tea plant (Camellia sinensis L.). Little is known about the physiological and molecular mechanisms underlying the effects of short-term repression of N metabolism on tea roots and leaves for a short time.
17p
viharuno2711
21-04-2020
11
1
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Nitrogen (N) and sulphur (S), being essential macronutrients, have important roles in microalgae metabolism. Effects of N- or S -shortage were investigated in the green microalgae Chlorella s o-rokiniana subjected to 24 h of starvation, by measuring the glutamine synthetase (GS) and O-ace - tylserine(thiol)lyase (OASTL) activities, p roteins and amino acids levels. To test possible met a-bolic impact related to carbon (C) metabolism in response to N- or S -deprivation, starch and total C, N and S contents were also determin ed. The growth of C.
9p
mentospurefresh
29-11-2019
13
1
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The effects of pre-treatments from s-methyl cysteine (SMC) alone, syringic acid (SA) alone and SMC plus SA against kainic acid (KA) induced injury in nerve growth factor (NGF) differentiated PC12 cells were investigated.
8p
vinasaki2711
12-11-2019
6
0
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Effects of different sodium nitrate and iron concentrations on the production of some metabolites and pigments and the activities of some nitrate assimilation enzymes [nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase and glutamate synthase (GOGAT)] were investigated in the growth medium of Spirulina platensis (Gamont) Geitler.
11p
vikimsa
22-02-2019
26
0
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Camellia sinensis L. is one of the most economically important crops in the world today. The leaves of this plant are harvested for tea production on a massive scale through a process that requires a large amount of inorganic nitrogen (N). However, knowledge of how inorganic nitrogen regulates the growth physiology of C. sinensis L. remains limited.
11p
danhdanh11
11-01-2019
35
1
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An activity that inhibited both glutamine synthetase (GS) and nitrate reductase (NR) was highly purified from cauli-flower (Brassica oleraceavar.botrytis) extracts.The final preparationcontainedanacyl-CoAoxidase andasecond proteinof theplant nucleotidepyrophosphatase family.This preparationhydrolysedNADH, ATPandFAD togenerate AMP andwas inhibited by fluoride, Cu 2+ ,Zn 2+ andNi 2+ .
7p
tumor12
20-04-2013
30
1
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Glutamine synthetase (GS) is expressed at high levels in subsets of cells in some tissues and at low levels in all cells of other tissues, suggesting that the GS gene is surrounded by multiple regulatory elements.We searched for such elements in the 2.5-kbupstreamregionand in the 2.6-kbfirst intronof theGSgene, usingFTO-2Bhepatoma andC2/7muscle cells as representatives of both cell types and transient transfec-tion assays as our tools.
7p
tumor12
20-04-2013
34
2
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Ammonium assimilation inEscherichia coliis regulated through multiple mechanisms (metabolic, signal transduction leading to covalent modification, transcription, and translation), which (in-)directly affect the activities of its two ammonium-assimilating enzymes, i.e. glutamine synthetase (GS) and glutamate dehydrogenase (GDH).
21p
awards
06-04-2013
28
3
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Ammonium assimilation is tightly regulated in nitrogen-fixing bacteria; the target of regulation is primarily the activity of the key enzyme glutamine synthetase that is regulated by reversible covalent modification by AMP groups in reactions catalysed by the bifunctional adenylyltransferase (ATase). The properties and regulation of ATase fromEscherichia colihave been studied in great detail.
12p
galaxyss3
21-03-2013
42
3
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Adenylyltransferase is a bifunctional enzyme that controls the enzymatic activity of dodecameric glutamine synthetase inEscherichia coliby rever-sible adenylylation and deadenylylation. Previous studies showed that the two similar but chemically distinct reactions are carried out by separate domains within adenylyltransferase.
13p
galaxyss3
19-03-2013
25
2
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