Red cell disorders

Gene: CYB5A

Amber List (moderate evidence)

CYB5A (cytochrome b5 type A)
EnsemblGeneIds (GRCh38): ENSG00000166347
EnsemblGeneIds (GRCh37): ENSG00000166347
OMIM: 613218, Gene2Phenotype
CYB5A is in 4 panels

1 review

Danielle Ariti (University of Melbourne)

I don't know

6 individuals from 4 unrelated families reported with bi-allelic (missense, nonsense and splice) variants.

PMID: 3951505- First patient reported with methemoglobinaemia and ambiguous genitalia.

PMID: 22170710 & 20080843- 4 individuals (3 siblings) with 46, XY DSD displayed elevated methemoglobin levels. However, methemoglobinaemia was clinically inapparent, with no evidence of episodes of cyanosis (blue skin), shortness of breath, or respiratory distress in any of them.

PMID: 32051920- 1 female reported with Isolated 17,20-Lyase Deficiency and methemoglobinaemia but no DSD.
Created: 16 Sep 2021, 1:42 a.m. | Last Modified: 16 Sep 2021, 1:42 a.m.
Panel Version: 0.153

Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal

Phenotypes
Methemoglobinaemia and ambiguous genitalia MIM#250790

Publications

Details

Mode of Inheritance
BIALLELIC, autosomal or pseudoautosomal
Sources
  • Expert Review Amber
  • London South GLH
  • NHS GMS
Phenotypes
  • Methemoglobinaemia and ambiguous genitalia MIM#250790
OMIM
613218
Clinvar variants
Variants in CYB5A
Penetrance
None
Publications
Panels with this gene

History Filter Activity

16 Sep 2021, Gel status: 2

Entity classified by Genomics England curator

Zornitza Stark (Victorian Clinical Genetics Services; Australian Genomics)

Gene: cyb5a has been classified as Amber List (Moderate Evidence).

16 Sep 2021, Gel status: 2

Set Phenotypes

Zornitza Stark (Victorian Clinical Genetics Services; Australian Genomics)

Phenotypes for gene: CYB5A were changed from 250790 Methemoglobinemia and ambiguous genitalia to Methemoglobinaemia and ambiguous genitalia MIM#250790

16 Sep 2021, Gel status: 2

Set publications

Zornitza Stark (Victorian Clinical Genetics Services; Australian Genomics)

Publications for gene: CYB5A were set to 8168836; 20080843

16 Sep 2021, Gel status: 2

Entity classified by Genomics England curator

Zornitza Stark (Victorian Clinical Genetics Services; Australian Genomics)

Gene: cyb5a has been classified as Amber List (Moderate Evidence).

15 Oct 2020, Gel status: 1

Set Phenotypes, Set publications

Zornitza Stark (Victorian Clinical Genetics Services; Australian Genomics)

Added phenotypes 250790 Methemoglobinemia and ambiguous genitalia for gene: CYB5A Publications for gene CYB5A were updated from 20080843; 8168836 to 8168836; 20080843

15 Sep 2020, Gel status: 1

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

Zornitza Stark (Victorian Clinical Genetics Services; Australian Genomics)

gene: CYB5A was added gene: CYB5A was added to Rare anaemia_GEL. Sources: NHS GMS,Expert Review Red,London South GLH Mode of inheritance for gene: CYB5A was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: CYB5A were set to 20080843; 8168836 Phenotypes for gene: CYB5A were set to 250790 Methemoglobinemia and ambiguous genitalia