Coproporphyrinogen Oxidase: Physiology, Biochemistry, and Organic Mechanism

The video explores the physiology, biochemistry, and mechanism of copro porphyrinogen oxidase, an enzyme involved in heme synthesis. It discusses the enzyme's systematic name, subcellular location, and recent discoveries about its mechanism. The video also covers the genetic mutation leading to enzyme deficiency, known as porphyria, and compares the enzyme's oxidative decarboxylation process with other enzymes. The video concludes with a brief mention of future topics related to protoporphyrinogen and heme B synthesis.

What is the systematic name of copro porphyrinogen oxidase?

• Copro porphyrinogen 3 oxidase

• Copro porphyrinogen 3 oxygen oxidoreductase

• Copro porphyrinogen 3 oxygen reductase

• Copro porphyrinogen 3 oxygenase

Where does the catalysis of copro porphyrinogen oxidase occur?

• In the inner membrane space of the mitochondria

• In the mitochondrial matrix

• In the cytosol

• In the outer membrane of the mitochondria

What is the gene associated with the deficiency of copro porphyrinogen oxidase?

• FECH

• ALAS

• HMOX

• CPOX

What is the main symptom of hereditary coproporphyria?

• Nausea and skin lesions

• Improved skin condition

• Enhanced vision

• Increased energy levels

What is the final product of the reaction catalyzed by copro porphyrinogen oxidase?

• Uroporphyrinogen III

• Protoporphyrinogen IX

• Heme B

• Coproporphyrinogen III

Which type of decarboxylation is performed by copro porphyrinogen oxidase?

• Reductive decarboxylation

• Hydrolytic decarboxylation

• Oxidative decarboxylation

• Non-oxidative decarboxylation

What is the role of catalase in the reaction involving copro porphyrinogen oxidase?

• To decompose hydrogen peroxide

• To oxidize the substrate

• To synthesize heme

• To reduce molecular oxygen

Which group is replaced by vinyl groups during the reaction catalyzed by copro porphyrinogen oxidase?

• Propionate groups

• Acetyl groups

• Methyl groups

• Carboxyl groups

What is unique about the mechanism of copro porphyrinogen oxidase in humans?

• It incorporates oxygen atoms into the final product

• It performs decarboxylation without coenzymes

• It does not use molecular oxygen

• It uses coenzymes

Which enzyme is responsible for converting protoporphyrinogen to protoporphyrin?

• Coproporphyrinogen oxidase

• Ferrochelatase

• Protoporphyrinogen oxidase

• Uroporphyrinogen decarboxylase