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Fatty Acid Catabolism
Medical School Biochemistry
10
Biochemistry
Graduate
10/23/2011

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Cards

Term
Adipocyte Fat stores are broken down by what enzyme?
Definition
Hormone sensitive lipase (HSL)
Term
Glucagon has what effect on Hormone Sensitive Lipase?
Definition
Upregulates HSL via phosphorylation

insulin has opposite effect via PP1
Term
What is perlippin?
Definition
Protein that binds to and protects triglycerides from HSL
Term
What is the effect of Glucagon on Perlippin?
Definition
Perlippin will stop binding to triglycerides

Insulin has opposite effect via PP1
Term
How do activated fatty acids cross the inner mitochondrial membrane?
Definition
Carnitine acyltransferase converts activated Fatty acids into Carnitine.

FA (as carnitine) then gets uptaken into cell via Carnitine transporter (facilitated diffusion)

Carnitine is then changed bact to Fatty acid
Term
What is the total amount of ATP generated from the degradation of one Palmitate molecule?
Definition
104
Term
Besides the mitochondria, where else does Beta-oxidation occur?
Definition
Perixisomes
Term
How are double bonds handled in beta oxidation?
Definition
enoyl-CoA isomerase
Term
Where does beta oxidation occur?
Definition
In the mitochondria
Term
What are the four steps of beta oxidation?
Definition
Palmitoyl-CoA -> Enoyl-CoA

via Acyl-Coa Dehydrogenase

Enoyl-CoA -> Beta-Hydroxy-acyl-Coa

via enoyl-CoA hydratase

Hydroxy-acyl-CoA -> Beta-Ketoacyl-CoA

via Beta-hydroxyacyl-CoA dehydrogenase

Beta-Ketoacyl-CoA -> Acetyl CoA

Via Acyl-CoA acetyltransferase
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