Malate-aspartate shuttle | Biochemistry

Quick Orientation

Section	Objective	Keywords
Definition	Understand the core idea	malate-aspartate shuttle, 2.5 ATP, 3 ATP
Reactions in the Cytosol and Mitochondria	Follow the sequence and key control points	Step 1, malate, Step 2
Aspartate-Glutamate Exchange	Learn the main facts and relationships	Step 3, glutamate, aspartate
Energetics	Learn the main facts and relationships	2.5 ATP, glycerol-3-phosphate shuttle, 1.5 ATP
Clinical Correlation	Connect the mechanism to clinical findings	2.5 ATP, 1.5 ATP

Section

Definition

Objective: Understand the core idea
Keywords: malate-aspartate shuttle, 2.5 ATP, 3 ATP

Reactions in the Cytosol and Mitochondria

Objective: Follow the sequence and key control points
Keywords: Step 1, malate, Step 2

Aspartate-Glutamate Exchange

Objective: Learn the main facts and relationships
Keywords: Step 3, glutamate, aspartate

Energetics

Objective: Learn the main facts and relationships
Keywords: 2.5 ATP, glycerol-3-phosphate shuttle, 1.5 ATP

Clinical Correlation

Objective: Connect the mechanism to clinical findings
Keywords: 2.5 ATP, 1.5 ATP

Definition

The malate-aspartate shuttle transfers cytosolic reducing equivalents (NADH) into mitochondria via oxaloacetate-malate and aspartate-glutamate interconversions, regenerating NADH inside the mitochondrial matrix.