X-18893626-C-T

Variant names:

• chrX-18893626-C-T
• rs773943898
• NM_000292.3:c.3567G>A

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Moderate BP6_Moderate BP7 BS2

The NM_000292.3(PHKA2):​c.3567G>A​(p.Glu1189Glu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000165 in 1,210,373 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 5 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.000053 (0 hom., 2 hem., cov: 23)
  • Exomes 𝑓: 0.000013 (0 hom. 3 hem.)
• Consequence: PHKA2 NM_000292.3 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.0930
• Publications: 0 publications found

Genes affected

PHKA2 (HGNC:8926): (phosphorylase kinase regulatory subunit alpha 2) Phosphorylase kinase is a polymer of 16 subunits, four each of alpha, beta, gamma and delta. The alpha subunit includes the skeletal muscle and hepatic isoforms, and the hepatic isoform is encoded by this gene. The beta subunit is the same in both the muscle and hepatic isoforms, and encoded by one gene. The gamma subunit also includes the skeletal muscle and hepatic isoforms, which are encoded by two different genes. The delta subunit is a calmodulin and can be encoded by three different genes. The gamma subunits contain the active site of the enzyme, whereas the alpha and beta subunits have regulatory functions controlled by phosphorylation. The delta subunit mediates the dependence of the enzyme on calcium concentration. Mutations in this gene cause glycogen storage disease type 9A, also known as X-linked liver glycogenosis. Alternatively spliced transcript variants have been reported, but the full-length nature of these variants has not been determined.[provided by RefSeq, Feb 2010]

PHKA2-AS1 (HGNC:44110): (PHKA2 antisense RNA 1)

ACMG classification

Our verdict: Benign. The variant received -9 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.45).
• BP6: Variant X-18893626-C-T is Benign according to our data. Variant chrX-18893626-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1587403.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=0.093 with no splicing effect.
• BS2: High Hemizygotes in GnomAd4 at 2 XL,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000292.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PHKA2	NM_000292.3	MANE Select	c.3567G>A	p.Glu1189Glu	synonymous	Exon 33 of 33	NP_000283.1	P46019
	PHKA2	NM_001440805.1		c.3591G>A	p.Glu1197Glu	synonymous	Exon 33 of 33	NP_001427734.1
	PHKA2	NM_001440800.1		c.3513G>A	p.Glu1171Glu	synonymous	Exon 32 of 32	NP_001427729.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PHKA2	ENST00000379942.5	TSL:1 MANE Select	c.3567G>A	p.Glu1189Glu	synonymous	Exon 33 of 33	ENSP00000369274.4	P46019
	PHKA2-AS1	ENST00000452900.5	TSL:1	n.467+288C>T		intron	N/A
	PHKA2	ENST00000897868.1		c.3591G>A	p.Glu1197Glu	synonymous	Exon 33 of 33	ENSP00000567927.1

Frequencies

GnomAD3 genomes AF: 0.0000533 AC: 6 AN: 112646 Hom.: 0 Cov.: 23

Gnomad AFR AF: 0.0000322

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000938

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000329 AC: 6 AN: 182479 AF XY: 0.0000148

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000741

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000128 AC: 14 AN: 1097727 Hom.: 0 Cov.: 30 AF XY: 0.00000826 AC XY: 3 AN XY: 363097

African (AFR) AF: 0.00 AC: 0 AN: 26397

American (AMR) AF: 0.00 AC: 0 AN: 35206

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19384

East Asian (EAS) AF: 0.00 AC: 0 AN: 30206

South Asian (SAS) AF: 0.00 AC: 0 AN: 54140

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40459

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4124

European-Non Finnish (NFE) AF: 0.0000166 AC: 14 AN: 841733

Other (OTH) AF: 0.00 AC: 0 AN: 46078

GnomAD4 genome AF: 0.0000533 AC: 6 AN: 112646 Hom.: 0 Cov.: 23 AF XY: 0.0000575 AC XY: 2 AN XY: 34780

African (AFR) AF: 0.0000322 AC: 1 AN: 31034

American (AMR) AF: 0.00 AC: 0 AN: 10699

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2651

East Asian (EAS) AF: 0.00 AC: 0 AN: 3585

South Asian (SAS) AF: 0.00 AC: 0 AN: 2721

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 6223

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 237

European-Non Finnish (NFE) AF: 0.0000938 AC: 5 AN: 53304

Other (OTH) AF: 0.00 AC: 0 AN: 1510

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000302

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Glycogen storage disease IXa1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.45
CADD	Benign	5.9
DANN	Benign	0.82
PhyloP100		0.093
Mutation Taster		=100/0	polymorphism

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: rs773943898; hg19: chrX-18911744;