About: Mitochondrial Carnitine Palmitoyltransferase Pathway     Goto   Sponge   NotDistinct   Permalink

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AttributesValues
rdf:type
rdfs:label
  • Mitochondrial Carnitine Palmitoyltransferase Pathway
rdfs:subClassOf
Semantic_Type
  • Functional Concept
Preferred_Name
  • Mitochondrial Carnitine Palmitoyltransferase Pathway
UMLS_CUI
  • C1513341
BioCarta_ID
  • h_cptPathway
ALT_DEFINITION
  • The oxidation of fatty acids is an important source of energy for ATP production in mitochondria through the entry of acetyl-CoA into the Krebs cycle. Fatty acids are oxidized inside the mitochondrial matrix but the fatty acids to be oxidized come from the cytosol. Fatty acids are activated in the cytosol by esterification with Coenzyme A (CoA) to form acyl-CoA (RCO-CoA, where R is the fatty acid acyl group). Activated medium-chain fatty acids (C8 and C10) freely diffuse into mitochondria to be oxidized but long chain fatty acids must be transported in. The transport of long chain fatty acids into mitochondria for oxidation is accomplished by the carnitine palmitoyltransferase system (CPTI and CPTII). CPTI exchanges carnitine for the CoA attached to long chain fatty acids to form a fatty acid-carnitine conjugate (RCO-carnitine). The fatty acid-carnitine is transported into the matrix by a transporter protein in the inner mitochondrial membrane. Once the fatty acid-carnitine is inside the matrix, CPTII exchanges CoA for carnitine to produce fatty acid-CoA once again, ready to enter fatty acid oxidation in the matrix to produce energy. The free carnitine is transported back out to renew the cytoplasmic pool of carnitine and allow the transfer process to continue.BIOCARTA
Legacy_Concept_Name
  • Mitochondrial_Carnitine_Palmitoyltransferase_Pathway
FULL_SYN
  • Mitochondrial Carnitine Palmitoyltransferase PathwayPTNCI
  • Mitochondrial Carnitine Palmitoyltransferase (CPT) SystemPTBIOCARTA
code
  • C39035
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