rs137852324

chrX-154532389-C-GchrX-154532389-C-T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1 PM2 PM5 PP3_Strong PP5_Very_Strong

The NM_001360016.2(G6PD):c.1361G>C(p.Arg454Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R454C) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 25)
• Consequence: G6PD NM_001360016.2 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 5.68

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 Pathogenic. Variant got 18 ACMG points.

• PM1: In a hotspot region, there are 11 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 0 uncertain in NM_001360016.2
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrX-154532390-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 93493.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.983
• PP5: Variant X-154532389-C-G is Pathogenic according to our data. Variant chrX-154532389-C-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1198343.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
G6PD	NM_001360016.2	c.1361G>C	p.Arg454Pro	missense_variant	11/13	ENST00000393562.10
G6PD	NM_000402.4	c.1451G>C	p.Arg484Pro	missense_variant	11/13
G6PD	NM_001042351.3	c.1361G>C	p.Arg454Pro	missense_variant	11/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
G6PD	ENST00000393562.10	c.1361G>C	p.Arg454Pro	missense_variant	11/13	1	NM_001360016.2	P4

Frequencies

GnomAD3 genomes Cov.: 25

GnomAD4 exome Cov.: 40

GnomAD4 genome Cov.: 25

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Anemia, nonspherocytic hemolytic, due to G6PD deficiency Pathogenic:2

Pathogenic, criteria provided, single submitter	curation	Dunham Lab, University of Washington	Aug 12, 2022	Variant found in hemizygote with deficiency (PP4). Decreased activity in red blood cells (5%) (PS3). Affects same amino acid as pathogenic 454R>C (ClinVar ID 93493) (PM5). In silico analyses support deleterious effect (PP3). Not found in gnomAD (PM2). Post_P 0.994 (odds of pathogenicity 1517, Prior_P 0.1). -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Feb 10, 2023	- -

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Dec 08, 2019

Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.71	D
BayesDel_noAF	Pathogenic	0.78
Cadd	Pathogenic	29
Dann	Uncertain	1.0
DEOGEN2	Pathogenic	0.98	D;D;D;.
FATHMM_MKL	Uncertain	0.86	D
M_CAP	Pathogenic	0.66	D
MetaRNN	Pathogenic	0.98	D;D;D;D
MetaSVM	Pathogenic	0.94	D
MutationAssessor	Pathogenic	4.5	H;H;H;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.79	T
Sift4G	Pathogenic	0.0010	D;.;D;D
Polyphen		1.0	D;D;D;.
Vest4		0.96
MutPred		0.90		Loss of catalytic residue at R454 (P = 0.139);Loss of catalytic residue at R454 (P = 0.139);Loss of catalytic residue at R454 (P = 0.139);.;
MVP		1.0
MPC		2.5
ClinPred		1.0	D
GERP RS		4.8
Varity_R		0.99
gMVP		1.0

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

No publications associated with this variant yet.

Other links and lift over

hg19: chrX-153760604;