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23 Ιουλ 2023 · ATP + H 2 O → ADP + Pi , ΔG 0 = -7.5; NET: glucose + ATP -→ Glucose-6-P + ADP, ΔG o = -4.2; In most biological reactions using ATP, the terminal phosphate of ATP is transferred to a substrate using an enzyme called a kinase. Hence, hexokinase transfers the gamma phosphate from ATP to a hexose sugar.
You should be able to identify the α, β, and γ phosphate groups of ATP, as well as the ribose and adenosine parts of the molecule. You should be able to explain how ATP acts as a phosphate group donor, and why such reactions are thermodynamically favorable.
10 Ιαν 2022 · ADP-glucose pyrophosphorylase (ADP-Glc PPase) catalyzes the first committed step in the pathway of glycogen and starch synthesis in bacteria and plants, respectively. Plant ADP-Glc PPase is a heterotetramer allosterically regulated by metabolites and post-translational modifications.
27 Απρ 2021 · Introduction. Adenosine triphosphate (ATP) is an important energy molecule in cells, and surplus of intracellular ATP is a risk factor of insulin resistance ( 1 ).
A relatively recently discovered ADP-dependent glucokinase (ADPGK) 3 (EC 2.7.1.147) catalyzes the phosphorylation of d -glucose to glucose-6-phosphate using MgADP as phosphoryl donor in contrast to the more typical ATP-utilizing hexokinases and glucokinases.
3 Μαρ 2006 · The preferential utilization of ADP-glucose and mannose-1-P rather than UDP-glucose and glucose-1-P clearly shows that the At5g18200.1 enzyme does not possess GalT activity. ADP-glucose and inorganic phosphate are the best donor/acceptor pair of substrates so far tested.
30 Αυγ 2014 · In alcohol phosphorylations, ATP is almost always the phosphate donor, and the mechanism is very consistent: the alcohol oxygen acts as a nucleophile, attacking the gamma-phosphorus of ATP and expelling ADP (look again, for example, at the glucose kinase reaction that we first saw in section 10.1D).
