Preferred Label : Mitochondrial trifunctional protein deficiency 1;
Symbol : MTPD1;
CISMeF acronym : MTPD;
Type : Phenotype, molecular basis known;
Alternative titles and symbols : Trifunctional protein deficiency; MTPD;
Included titles and symbols : Mitochondrial trifunctional protein deficiency 1 with myopathy and neuropathy;
Description : The mitochondrial trifunctional protein, composed of 4 alpha and 4 beta subunits,
catalyzes 3 steps in mitochondrial beta-oxidation of fatty acids: long-chain 3-hydroxyacyl-CoA
dehydrogenase (LCHAD), long-chain enoyl-CoA hydratase, and long-chain thiolase activities.
Trifunctional protein deficiency is characterized by decreased activity of all 3 enzymes.
Clinically, classic trifunctional protein deficiency can be classified into 3 main
clinical phenotypes: neonatal onset of a severe, lethal condition resulting in sudden
unexplained infant death (SIDS; 272120), infantile onset of a hepatic Reye-like syndrome,
and late-adolescent onset of primarily a skeletal myopathy (Spiekerkoetter et al.,
2003). Some patients with MTP deficiency show a protracted progressive course associated
with myopathy, recurrent rhabdomyolysis, and sensorimotor axonal neuropathy. These
patients tend to survive into adolescence and adulthood (den Boer et al., 2003). See
also isolated LCHAD deficiency (609016), which is caused by mutation in the HADHA
gene.;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the alpha subunit of the hydroxyacyl-CoA dehydrogenase/3-ketoacyl-CoA
thiolase/enoyl-CoA hydratase (HADHA, 600890.0003); Caused by mutation in the beta subunit of the hydroxyacyl-CoA dehydrogenase/3-ketoacyl-CoA
thiolase/enoyl-CoA hydratase (HADHB, 143450.0001);
Laboratory abnormalities : Hypoketotic hypoglycemia; Decreased activity of long-chain 3-hydroxyacyl-CoA dehydrogenase, long-chain 3-oxoacyl-CoA
thiolase, and long-chain 2-enoyl-CoA hydratase; Increased serum acylcarnitines; Hyperammonemia; Myoglobinuria; Abnormal liver enzymes;
Prefixed ID : #609015;
Origin ID : 609015;
UMLS CUI : C1969443;
Automatic exact mappings (from CISMeF team)
Currated CISMeF NLP mapping
DO Cross reference
Genes related to phenotype
HPO term(s)
ORDO concept(s)
Semantic type(s)
UMLS correspondences (same concept)