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Hereditary neuropathy NOT PMP22 copy number

Gene: TTPA

Amber List (moderate evidence)

TTPA (alpha tocopherol transfer protein)
EnsemblGeneIds (GRCh38): ENSG00000137561
EnsemblGeneIds (GRCh37): ENSG00000137561
OMIM: 600415, Gene2Phenotype
TTPA is in 12 panels

5 reviews

Louise Daugherty (Genomics England Curator)

I don't know

Gene rated Amber : From feedback from Genomics England Clinical team (Anna de Burca and Meriel McEntagart): Extension of panel scope - ataxia with neuropathy / Broader phenotype: ataxia with vitamin E deficiency More likely to present as ataxia on ataxia panel
Created: 7 Dec 2019, 12:03 a.m. | Last Modified: 7 Dec 2019, 12:03 a.m.
Panel Version: 0.86
This gene has changed ratings because the panel for R78 was going to be a broad panel (to include conditions where neuropathy is part of a more complex phenotype or where there is overlap with another neurological presentation eg. HSP) but subsequently during the follow up call on 21st June with the Test Group it was agreed that it was more clinically relevant for R78 to be restricted to genes that are associated with isolated neuropathy, which this panel represents. For genes that represent the broader phenotype see https://panelapp.genomicsengland.co.uk/panels/85/.
Created: 6 Dec 2019, 10:25 p.m. | Last Modified: 6 Dec 2019, 10:25 p.m.
Panel Version: 0.84
Review and rating uploaded from file (Curation_Template_GMS_Neuro_AR_20190521.xlsx) submitted by Alex Rossor (UCL Institute of Neurology) on behalf of London North GLH for GMS Neurology specialist test group.
Created: 11 Jun 2019, 1:40 p.m.
Review and rating submitted by Natalie Forrester (SWGLH - Bristol Genetics) on behalf of South West GLH for GMS Neurology specialist test group.
Created: 29 Apr 2019, 12:53 p.m.

Natalie Forrester (SWGLH - Bristol Genetics)

Red List (low evidence)

Unable to find any evidence of clear neuropathy association
Created: 29 Apr 2019, 12:30 p.m.

Phenotypes
Hereditary Neuropathies

Rita Horvath (Institute of Genetic Medicine, Newcastle University)

I don't know

Alexander Rossor (UCL Institute of Neurology)

Green List (high evidence)

Not a CMT gene
Created: 9 Dec 2015, 8:50 a.m.

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Phenotypes
Early onset ataxia and sensory axonal neuropathy similar to Friedreich ataxia, head titubation, normal fat absorption unlike abetalipoproteinaemia, rarely retinitis pigmentosa

Mary Reilly (Institute of Neurology)

Not a CMT gene
Created: 8 Dec 2015, 3:06 p.m.

Details

Mode of Inheritance
BIALLELIC, autosomal or pseudoautosomal
Sources
  • Expert Review Amber
  • NHS GMS
  • London North GLH
  • South West GLH
  • Emory Genetics Laboratory
  • London North GLH
  • NHS GMS
  • South West GLH
Phenotypes
  • Hereditary Neuropathies
  • Early onset ataxia and sensory axonal neuropathy similar to Friedreich ataxia, head titubation, normal fat absorption unlike abetalipoproteinaemia, rarely retinitis pigmentosa
OMIM
600415
Clinvar variants
Variants in TTPA
Penetrance
None
Panels with this gene

History Filter Activity

6 Dec 2019, Gel status: 2

Added New Source, Status Update

Louise Daugherty (Genomics England Curator)

Source Expert Review Amber was added to TTPA. Rating Changed from Red List (low evidence) to Amber List (moderate evidence)

5 Dec 2019, Gel status: 1

Created, Added New Source, Set mode of inheritance, Set Phenotypes

Ellen McDonagh (Genomics England Curator)

gene: TTPA was added gene: TTPA was added to Hereditary neuropathy NOT PMP22 copy number. Sources: Emory Genetics Laboratory,South West GLH,London North GLH,NHS GMS Mode of inheritance for gene: TTPA was set to BIALLELIC, autosomal or pseudoautosomal Phenotypes for gene: TTPA were set to Hereditary Neuropathies; Early onset ataxia and sensory axonal neuropathy similar to Friedreich ataxia, head titubation, normal fat absorption unlike abetalipoproteinaemia, rarely retinitis pigmentosa