biochemistry enzyme question. 4. Given the enzyme name below, describe the react

Question

biochemistry enzyme question.

4. Given the enzyme name below, describe the reaction catalyzed by the enzyme. Refer to your from class regarding variations in the naming of enzymes. You may need to look up some of the reactions. i. Glutamine synthetase Glutamine hydrolase iii. 3-Phosphoglycerate mutase iv. Glucose Kinase Malate hydratase vi. Glutathione : cystine oxidoreductase vii. Pyruvate transaminase viii. glutathione synthetase ix. Glycerol hydratase x. Hexokinase xi. Phosphoglucose isomerase (PGI) xii. Phosphofructokinase (PFK) xiii. Triose phosphate isomerase (TIM) xiv. Glyceraldehyde-3-phosphale dehydrogenase (GAPDH) xv. Phosphoglycerate kinase (PGK) xvi. Phosphoglycerate mutase (PGM) xvii. Enolase xviii. Pyruvate kinase (PK)

Explanation / Answer

i. Glutamine synthetase: Condensation of glutamate and ammonia gives rise to glutamine

ii.     Glutamine hydrolysis: Hydrolysis glutamine into glutamate and ammonia

iii.    3-Phosphoglycerate mutase: It catalyzes the internal transfer of a phosphate group from C-3 to C-2 which results in the conversion of 3-phosphoglycerate (3PG) to 2-phosphoglycerate

iv. Glucose Kinase: It facilitates phosphorylation of glucose to glucose-6-phosphate.

v.     Malate hydratase: Conversion of malate to maleat and water.

vi.    Glutathione: cystine oxidoreductase: It converts glutathione + cystine into glutathione disulfide + cysteine

vii.   Pyruvate transaminase: This enzyme catalyses L-glutamine and pyruvate, into products are 2-oxoglutarate and L-alanine.

viii. Glutathione synthetase: It catalyses the condensation of gamma-glutamylcysteine and glycine, to form glutathione.

ix.    Glycerol hydratase: It catalyzes glycerol into 3-hydroxypropanal and H2O.

x.     Hexokinase: It phosphorylates the glucose to glucose-6-phosphate.

xi.    Phosphoglucose isomerase: Conversion of glucose-6-phosphate to fructose-6.phosphate.

xii.   Phosphofructokinase: It catalyses phosphorylation of fructose-6-phosphate to fructose-1, 6- bisphosphate.

xiii. Triose phosphate isomerase: It catalyzes interconversion of the triosephosphate isomers dihydroxyacetone phosphate and D-glyceraldehyde 3-phosphate.

Xiv. Glyceraldehyde-3-phosphate dehydrogenase: It pholylates glyceraldehyde-3-phosphate + NADP into glyceraldehyde-1,3-phosphate and NADPH + H+.

xv.   Phosphoglycerate kinase: It dephosphorylates the 1,3-bisphosphoglycerate (1,3-BPG) to 3-phosphoglycerate.

xvi. Phosphoglycerate mutase: It catalyzes the internal transfer of a phosphate group from C-3 to C-2 which results in the conversion of 3-phosphoglycerate (3PG) to 2-phosphoglycerate (2PG).

xvii. Enolase: It catalyses of the conversion of 2-phosphoglycerate (2-PG) to phosphoenolpyruvate (PEP).

xviii. Pyruvate kinase: It catalyses the transfer of a phosphate group from phosphoenolpyruvate(PEP) ADP, yielding one molecule of pyruvate.

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