X-154532389-C-G

Variant names:

• chrX-154532389-C-G
• rs137852324
• NM_001360016.2:c.1361G>C

Variant summary

Our verdict is Pathogenic. The variant received 19 ACMG points: 19P and 0B. PM1 PM2 PM5 PP2 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 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 criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 5.68
• Publications: 0 publications found

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]

G6PD Gene-Disease associations (from GenCC):

• anemia, nonspherocytic hemolytic, due to G6PD deficiency

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• G6PD deficiency

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• class I glucose-6-phosphate dehydrogenase deficiency

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 19 ACMG points.

• PM1: In a hotspot region, there are 18 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 1 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 VariationId is 93493.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 185 curated pathogenic missense variants (we use a threshold of 10). The gene has 42 curated benign missense variants. Gene score misZ: 2.0008 (below the threshold of 3.09). Trascript score misZ: NaN (below the threshold of 3.09). GenCC associations: The gene is linked to anemia, nonspherocytic hemolytic, due to G6PD deficiency, class I glucose-6-phosphate dehydrogenase deficiency, G6PD deficiency.
• 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 Pathogenic. ClinVar VariationId is 1198343.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
G6PD	NM_001360016.2	c.1361G>C	p.Arg454Pro	missense_variant	Exon 11 of 13	ENST00000393562.10	NP_001346945.1
G6PD	NM_000402.4	c.1451G>C	p.Arg484Pro	missense_variant	Exon 11 of 13		NP_000393.4
G6PD	NM_001042351.3	c.1361G>C	p.Arg454Pro	missense_variant	Exon 11 of 13		NP_001035810.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
G6PD	ENST00000393562.10	c.1361G>C	p.Arg454Pro	missense_variant	Exon 11 of 13	1	NM_001360016.2	ENSP00000377192.3

Frequencies

GnomAD3 genomes Cov.: 25

GnomAD4 exome Cov.: 40

GnomAD4 genome Cov.: 25

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

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

Feb 10, 2023

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 12, 2022

Dunham Lab, University of Washington

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: curation

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). -

not provided Pathogenic:1

Jul 15, 2024

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 36681081, 33636823) -

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
LIST_S2	Pathogenic	0.99	.;.;D;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;.
PhyloP100		5.7
PrimateAI	Pathogenic	0.79	T
PROVEAN	Pathogenic	-6.1	.;.;D;D
REVEL	Pathogenic	0.93
Sift	Uncertain	0.0010	.;.;D;D
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
Mutation Taster		=3/97	disease causing

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

Other links and lift over

dbSNP: rs137852324; hg19: chrX-153760604;