Hyperammonaemia

Gene: SERAC1

Green List (high evidence)

SERAC1 (serine active site containing 1)
EnsemblGeneIds (GRCh38): ENSG00000122335
EnsemblGeneIds (GRCh37): ENSG00000122335
OMIM: 614725, Gene2Phenotype
SERAC1 is in 16 panels

3 reviews

Louise Daugherty (Genomics England Curator)

Green List (high evidence)

Comment on publications: Added publications to support the phenotype
Created: 19 Dec 2017, 11:44 a.m.
Comment on phenotypes: Added phenotype
Created: 19 Dec 2017, 11:43 a.m.
Comment on mode of inheritance: added MOI from expert review
Created: 19 Dec 2017, 11:43 a.m.
Comment on list classification: changed form Red to to Green due to evidence in the literature
Created: 19 Dec 2017, 11:43 a.m.
Added from Intellectual disability panel update as gene is also relevant to this panel
Created: 19 Dec 2017, 11:42 a.m.
Wortmann et al (2017) PMID: 29205472 reclassified MEGDEL syndrome to MEGDHEL syndrome, 3-MEthylGlutaconic aciduria, Dystonia-Deafness, Hepatopathy, Encephalopathy, Leigh-like syndrome (MEGDHEL) as they found that liver involvement was an additional clinical feature, so Hepatopathy was incorporated into the acronym. From a study of 67 individuals (39 previously unreported) from 59 families were included (age range 5 days - 33.4 years, median age 9 years) Wortmann et al idenitified 41 different SERAC1 biallelic variants, including 20 that have not been reported before. With exception of two families with a milder phenotype, all affected individuals show a strikingly homogeneous phenotype and time course. Severe, reversible neonatal liver dysfunction and hypoglycemia was seen in more than 40% of all cases. Starting at a median age of six months muscular hypotonia (91%) was seen, followed by progressive spasticity (82%, median onset 15 months) and dystonia (82%, 18 months). The majority of affected individuals never learnt to walk (68%). 79% suffered hearing loss, 58% never learnt to speak, nearly all had significant intellectual disability (88%).
Created: 19 Dec 2017, 11:40 a.m.

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Phenotypes
3-methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndrome, 614739; MEGDEL syndrome; 3-MEthylGlutaconic aciduria, Dystonia-Deafness, Hepatopathy, Encephalopathy, Leigh-like syndrome; MEGDHEL syndrome

Publications

Peter Clayton (UCL Institute of Child Health)

Red List (low evidence)

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Phenotypes
3-Methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndromeMEGD(H)EL

Ellen McDonagh (Genomics England Curator)

Please note that phenotypes that already existed for this gene panel (viewed under Gene Summary) and Ensembl transcripts were accidently uploaded under Peter Clayton (UCL Institute of Child Health)'s review and were not suggested by him. We are working on a fix in PanelApp to correct this.
Created: 5 Nov 2015, 5:19 p.m.

Details

History Filter Activity

19 Dec 2017, Gel status: 3

Set Phenotypes

Louise Daugherty (Genomics England Curator)

Phenotypes for SERAC1 were set to 3-methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndrome, 614739; MEGDEL syndrome; 3-MEthylGlutaconic aciduria, Dystonia-Deafness, Hepatopathy, Encephalopathy, Leigh-like syndrome; MEGDHEL syndrome; Hypoglycemia

19 Dec 2017, Gel status: 3

Set publications

Louise Daugherty (Genomics England Curator)

Publications for SERAC1 were set to 29205472; 22683713; 16527507; 28482397; 28778788; 27186703; 27604308

19 Dec 2017, Gel status: 3

Set Phenotypes

Louise Daugherty (Genomics England Curator)

Phenotypes for SERAC1 were set to 3-methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndrome, 614739; MEGDEL syndrome; 3-MEthylGlutaconic aciduria, Dystonia-Deafness, Hepatopathy, Encephalopathy, Leigh-like syndrome; MEGDHEL syndrome

19 Dec 2017, Gel status: 3

Set mode of inheritance

Louise Daugherty (Genomics England Curator)

Mode of inheritance for SERAC1 was changed from to BIALLELIC, autosomal or pseudoautosomal

19 Dec 2017, Gel status: 3

Gene classified by Genomics England curator

Louise Daugherty (Genomics England Curator)

This gene has been classified as Green List (High Evidence).

22 Nov 2016, Gel status: 1

panel promoted to version 1

Sarah Leigh (Genomics England Curator)

Promoted to version 1 on 22nd November 2016

5 May 2015, Gel status: 1

Added New Source

Eik Haraldsdottir (Genomics England)

SERAC1 was added to Hyperammonaemiapanel. Sources: Emory Genetics Laboratory