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Undiagnosed metabolic disorders

Gene: MTTP

Green List (high evidence)

MTTP (microsomal triglyceride transfer protein)
EnsemblGeneIds (GRCh38): ENSG00000138823
EnsemblGeneIds (GRCh37): ENSG00000138823
OMIM: 157147, Gene2Phenotype
MTTP is in 15 panels

1 review

Louise Daugherty (NIHR BioResource - Rare Diseases Study (NIHRBR-RD), University of Cambridge & NHS Blood and Transplant)

Green List (high evidence)

Abetalipoproteinemia (ABL) is characterized by permanently low levels (below the 5th percentile) of apolipoprotein B and LDL cholesterol. Many unrelated cases (more than 3) that link at least 10 variants of MTTP to Abetalipoproteinemia (PMID: 8361539, 8361539, 10446076, 10946006, 17275380 ). Note that in PMID 27578136 (2016) report the case of two cousins, one presenting classical symptoms of abetalipoproteinemia (hmz for c.1867+1G>A) and one presenting a much attenuated phenotype (compound htz for c.1867+1G>A and p.R450C) report suggests that ABL can present itself with a very incomplete clinical penetrance. PMID 16721486 reports protective phenotype {Metabolic syndrome, protection against} 605552 associated with monoallelic variant rs3816873. On Radboud MOVEMENT DISORDERS panel.
Created: 23 Feb 2017, 5:14 p.m.

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Phenotypes
Abetalipoproteinemia, 200100; (ACANTHOCYTOSIS, BASSEN-KORNZWEIG SYNDROME, MICROSOMAL TRIGLYCERIDE TRANSFER PROTEIN DEFICIENCY, MTP DEFICIENCY)

Publications

Details

Mode of Inheritance
BIALLELIC, autosomal or pseudoautosomal
Sources
  • Expert Review Green
  • Radboud University Medical Center, Nijmegen
  • Illumina TruGenome Clinical Sequencing Services
  • Literature
Phenotypes
  • Familial abetalipoproteinaemia (Inherited hypolipidaemias)
  • Abetalipoproteinemia, 200100
  • (ACANTHOCYTOSIS, BASSEN-KORNZWEIG SYNDROME, MICROSOMAL TRIGLYCERIDE TRANSFER PROTEIN DEFICIENCY, MTP DEFICIENCY)
OMIM
157147
Clinvar variants
Variants in MTTP
Penetrance
Complete
Publications
Panels with this gene

History Filter Activity

27 Feb 2017, Gel status: 4

panel promoted to version 1

Sarah Leigh (Genomics England Curator)

Construction of “Undiagnosed Metabolic Disorders” (UDM) panel • The 614 genes from the neurometabolic gene panel (PMID: 27604308) added • Green genes downloaded from V1 metabolic panels (Cerebral folate deficiency, Congenital disorders of glycosylation, Hyperammonaemia, Ketotic hypoglycaemia, Mitochondrial disorders, Mucopolysaccharideosis, Gaucher, Fabry, Peroxisomal disorders), sources replaced with "Expert review green", then loaded as a review onto UDM panel, resulting in 367 green genes and 333 red (therefore 86 new green genes included from the additional metabolic panels that weren't previously on the UDM panel) • Downloaded green genes from all panels. Removed genes from none V1 panels. Removed genes from the metabolic panels mentioned above. Compared the remaining genes with the red genes from UDM panel. Loaded as an "Expert review Amber" review to the overlapping genes, (the panel name where the genes came from was used as the phenotype) • Used variant information from PMID 27604308 to review the genes on this panel • Reviewed genes on UDM panel with genes from Emory "Inherited Metabolic Disorders: Sequencing Panel" and UKGTN “Inborn Errors of Metabolism 226 panel”, changing status where appropriate, added 14 UKGTN genes that had not be listed before • Review 10 red genes that had not previously been reviewed, 4/10 were reclassified as green • Review the remaining 145 red genes that had not previously been reviewed (shared between reviewers EM, RF, LD, AT, HB, ON & SL), resulting in 60 green, 11 amber, 70 red, 4 I don’t know reviews) • Reviewed genes from PMID: 24816252 as a publication to genes found in the Inborn error or metabolism Genes metabolomics GWAS paper (figure 5). 2 new genes added

24 Feb 2017, Gel status: 4

Set Mode of Inheritance, Added New Source

Ellen McDonagh (Genomics England Curator)

MTTP was added to Undiagnosed metabolic disorderspanel. Source: Expert Review Green MTTP was added to Undiagnosed metabolic disorderspanel. Source: Illumina TruGenome Clinical Sequencing Services MTTP was added to Undiagnosed metabolic disorderspanel. Source: Radboud University Medical Center, Nijmegen Model of inheritance for gene MTTP was set to BIALLELIC, autosomal or pseudoautosomal

28 Oct 2016, Gel status: 0

Created

Sarah Leigh (Genomics England Curator)

MTTP was created by sleigh

28 Oct 2016, Gel status: 0

Added New Source

Sarah Leigh (Genomics England Curator)

MTTP was added to Undiagnosed metabolic disorderspanel. Sources: Literature