Enoyl CoA isomerase
Δ3-Δ2-Enoyl-CoA isomerase | |||||||||
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ExPASy NiceZyme view | | ||||||||
KEGG | KEGG entry | ||||||||
MetaCyc | metabolic pathway | ||||||||
PRIAM | profile | ||||||||
PDB structures | RCSB PDB PDBe PDBsum | ||||||||
Gene Ontology | AmiGO / QuickGO | ||||||||
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Enoyl-CoA-(∆) isomerase (
(position 2) as below:This enzyme has an important role in the
unsaturated fatty acids in beta oxidation
.
Mechanism
Enoyl-CoA
fatty acids with double bonds at even-numbered carbon positions also produces 3-trans-enoyl-CoA in mammals and yeasts, enoyl-CoA isomerase is technically required for their metabolism as well.[3] The reaction mechanism is detailed in figure 1,[4] and the base that initiates the isomerization and NH groups that stabilize the intermediate are located on the active site of enoyl-coA isomerase
.
As it functions in the step immediately preceding the actual
chain.Sub-classification
Enoyl-CoA
isomerases
can be categorized into three classes:
- monofunctional mitochondrial
- monofunctional peroxisomal
- multifunctional
The monofunctional
mitochondrial enoyl Co-A isomerase: short-chain and long-chain [4].[6] In an immunoblot, antibodies were run against all enoyl CoA isomerase. However, two of these isomerases had antibody attachment: the short chain isomerase and the peroxisomal multifunctional enzyme.[6] There was one enzyme which did not have binding specificity to this antibody: mitochondrial long-chain isomerase. Long-chain isomerase was found when it eluted at a lower potassium phosphate concentration in the gradient.[6][7]
Thus, the discovery of three sub-classes of enoyl CoA isomerase was made.
Although all three classes of
hydratase activity.[13] The Plant form did not form a 2-cis-isomer (from enoyl-CoA hydratase) or D- or L- 3 hydroxy derivative (L-(−)-3-hydroxyacyl-CoA dehydrogenase): products of multifunctional enzyme of rat liver.[13] The turnover rates of these the two sub divisions of peroxisomes are very different. The Kcat/Km ratio in cotyledons is 10^6 M-1s-1 which outperforms the ratio .07 * 10^6 M-1s-1.[13] Due to a high turnover rate, the plant peroxisomes contain a lesser amount of enoyl-CoA isomerase than their counterparts in the rat liver.[13]
In rat liver,
Structure
All classes of enoyl-CoA
alpha-helix.[19]
In enoyl-CoA
carbonyl oxygen of the acyl-CoA intermediate. The formation of this oxyanion hole stabilizes the transition state of the enzyme-catalyzed reaction.[4]
Moreover, a
glutamate side chain to retain the proton and later deliver it back to the acyl-CoA, on a different carbon position.[4]
The NH-containing
peroxisomal enzymes in a yeast species, Saccharomyces cerevisiae. Their relative locations on the enzyme can be compared in figure 2.[4]
The
enzymes in Saccharomyces cerevisiae is displayed in figure 3.[20]
History
Enoyl-CoA
unicellular
organisms.
By 1994, using the
In the attempts to examine the
to be specified in the next section.Clinical significance
In
dicarboxylic acids, a condition called dicarboxylic aciduria.[9]
More recent studies link
latency of the virus and no existing cures to rid the virus specifically,[25] HCV is a serious problem that is causing more deaths than HIV/AIDS in the United States,[26] but its threat still do not receive adequate attention. The need for a HCV-specific treatment is essential, and according to John Ward, the director of the CDC Hepatitis Division, it can save up to 120,000 lives.[26]
According to
intracellular level.[23]
See also
References
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{{cite journal}}
: CS1 maint: numeric names: authors list (link - PMID 1351742.
- S2CID 69172923.
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- S2CID 19755395.
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- ^ a b "Hepatitis C Kills More Americans Than HIV/AIDS". Voice of America, Health. 27 February 2012. Retrieved 3 March 2012.
- PMID 17654742.