Cofactors (prosthetic groups): flavin adenine dinucleotide (FAD), heme b, iron-sulfur (Fe-S) clusters, Coenzyme Q. … A flavin adenine dinucleotide (FAD) prosthetic group accepts electrons from succinate, forming fumarate and FADH2.
Which complex is coenzyme Q?
The coenzyme Q : cytochrome c – oxidoreductase, sometimes called the cytochrome bc1 complex, and at other times complex III, is the third complex in the electron transport chain (EC 1.10. 2.2), playing a critical role in biochemical generation of ATP (oxidative phosphorylation).
What are the 4 complexes used in the ETC?
The ETC proteins in a general order are complex I, complex II, coenzyme Q, complex III, cytochrome C, and complex IV.
What are the other name for complex I and II?
Q-Cycle and Complex III of Electron Transport Chain. Complex I and II of Electron Transport Chain. Complex I of the electron transport chain, also known as NADH oxidoreductase or NADH dehydrogenase, is a very large, L-shaped structure that functions to accept high energy electrons from NADH molecules.
What type of electron carrier has a prosthetic group derived from vitamin b2?
This complex, labeled I, is composed of flavin mononucleotide (FMN) and an iron-sulfur (Fe-S)-containing protein. FMN, which is derived from vitamin B2, also called riboflavin, is one of several prosthetic groups or co-factors in the electron transport chain.
Is Coenzyme Q is a protein?
Coenzyme Q10 (CoQ10) is a protein found within all tissues of the body, so much so that it is also referred to as ubiquinone.
What is complex 2 called?
Complex II is the enzyme that carries out this transformation in the citric acid cycle, and so the complex is also called “succinate dehydrogenase”. Complex II is actually an integral part of the TCA cycle, which takes place in the mitochondrial matrix.
Is complex 3 oxidized or reduced?
The heme molecule is similar to the heme in hemoglobin, but it carries electrons, not oxygen. As a result, the iron ion at its core is reduced and oxidized as it passes the electrons, fluctuating between different oxidation states: Fe2+ (reduced) and Fe3+ (oxidized).
How does etc work?
The electron transport chain is a series of proteins embedded in the inner mitochondrial membrane. … Protons flow down their concentration gradient into the matrix through the membrane protein ATP synthase, causing it to spin (like a water wheel) and catalyze conversion of ADP to ATP.
Is Complex 2 a proton pump?
Complex II does not pump protons directly. Complex II does send two protons on to Complex III in the form of the reduced ubiquinol.
Is Complex 1 oxidized?
Complex I is the first enzyme of the respiratory chain. It oxidizes NADH, which is generated through the Krebs cycle in the mitochondrial matrix, and uses the two electrons to reduce ubiquinone to ubiquinol.
What coenzymes is derived from riboflavin?
Riboflavin is naturally present in some foods, added to some food products, and available as a dietary supplement. This vitamin is an essential component of two major coenzymes, flavin mononucleotide (FMN; also known as riboflavin-5′-phosphate) and flavin adenine dinucleotide (FAD).