X-154531480-C-T

Position:

• chrX-154531480-C-T

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Strong BP6 BS2_Supporting

The NM_001360016.2(G6PD):​c.*520G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000992 in 130,037 control chromosomes in the GnomAD database, including 1 homozygotes. There are 43 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.0011 (1 hom., 40 hem., cov: 23)
  • Exomes 𝑓: 0.00061 (0 hom. 3 hem.)
• Consequence: G6PD NM_001360016.2 3_prime_UTR
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: -1.06

Genes affected

G6PD (HGNC:4057): (glucose-6-phosphate dehydrogenase) This gene encodes glucose-6-phosphate dehydrogenase. This protein is a cytosolic enzyme encoded by a housekeeping X-linked gene whose main function is to produce NADPH, a key electron donor in the defense against oxidizing agents and in reductive biosynthetic reactions. G6PD is remarkable for its genetic diversity. Many variants of G6PD, mostly produced from missense mutations, have been described with wide ranging levels of enzyme activity and associated clinical symptoms. G6PD deficiency may cause neonatal jaundice, acute hemolysis, or severe chronic non-spherocytic hemolytic anemia. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.93).
• BP6: Variant X-154531480-C-T is Benign according to our data. Variant chrX-154531480-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 368094.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.
• BS2: High Hemizygotes in GnomAd4 at 40 XL geneVariant has number of hemizygotes lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
G6PD	NM_001360016.2	c.*520G>A		3_prime_UTR_variant	13/13	ENST00000393562.10
G6PD	NM_000402.4	c.*520G>A		3_prime_UTR_variant	13/13
G6PD	NM_001042351.3	c.*520G>A		3_prime_UTR_variant	13/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
G6PD	ENST00000393562.10	c.*520G>A		3_prime_UTR_variant	13/13	1	NM_001360016.2	P4

Frequencies

GnomAD3 genomes AF: 0.00105 AC: 118 AN: 112065 Hom.: 1 Cov.: 23 AF XY: 0.00117 AC XY: 40 AN XY: 34259

Gnomad AFR AF: 0.000130

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00407

Gnomad ASJ AF: 0.0245

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000113

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.000614 AC: 11 AN: 17921 Hom.: 0 Cov.: 0 AF XY: 0.000863 AC XY: 3 AN XY: 3475

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000898

Gnomad4 ASJ exome AF: 0.0143

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000372

Gnomad4 OTH exome AF: 0.000993

GnomAD4 genome AF: 0.00105 AC: 118 AN: 112116 Hom.: 1 Cov.: 23 AF XY: 0.00117 AC XY: 40 AN XY: 34320

Gnomad4 AFR AF: 0.000129

Gnomad4 AMR AF: 0.00406

Gnomad4 ASJ AF: 0.0245

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000113

Gnomad4 OTH AF: 0.00

Alfa AF: 0.00108 Hom.: 6

Bravo AF: 0.00133

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

G6PD deficiency Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Dec 01, 2022

G6PD: BS2 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.93
CADD	Benign	0.067
DANN	Benign	0.41
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs782764609; hg19: chrX-153759695;