chrX-18893578-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_000292.3(PHKA2):c.3615G>A(p.Pro1205Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000112 in 1,210,006 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 64 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. P1205P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., 9 hem., cov: 23)

Exomes 𝑓: 0.00011 ( 0 hom. 55 hem. )

Consequence

PHKA2
NM_000292.3 synonymous

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: -3.25

Publications

1 publications found

Variant links:

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 links:

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

PHKA2-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.89).

BP6

Variant X-18893578-C-T is Benign according to our data. Variant chrX-18893578-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 515896.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-3.25 with no splicing effect.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.00016 (18/112557) while in subpopulation SAS AF = 0.000371 (1/2699). AF 95% confidence interval is 0.000144. There are 0 homozygotes in GnomAd4. There are 9 alleles in the male GnomAd4 subpopulation. Median coverage is 23. This position passed quality control check.

BS2

High Hemizygotes in GnomAd4 at 9 XL,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PHKA2	NM_000292.3 link	c.3615G>A	p.Pro1205Pro	synonymous_variant	Exon 33 of 33	ENST00000379942.5	NP_000283.1	P46019

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PHKA2	ENST00000379942.5 link	c.3615G>A	p.Pro1205Pro	synonymous_variant	Exon 33 of 33	1	NM_000292.3	ENSP00000369274.4		P46019

Frequencies

GnomAD3 genomes

AF:

0.000160

AC:

AN:

112505

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000968

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000279

Gnomad SAS

AF:

0.000369

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000244

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000327

AC:

AN:

183223

AF XY:

0.0000295

show subpopulations

Gnomad AFR exome

AF:

0.0000760

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000721

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000245

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000107

AC:

117

AN:

1097449

Hom.:

Cov.:

AF XY:

0.000152

AC XY:

AN XY:

362813

show subpopulations

African (AFR)

AF:

0.0000379

AC:

AN:

26390

American (AMR)

AF:

0.0000568

AC:

AN:

35206

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19379

East Asian (EAS)

AF:

0.00

AC:

AN:

30203

South Asian (SAS)

AF:

0.000203

AC:

AN:

54130

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40512

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4135

European-Non Finnish (NFE)

AF:

0.000113

AC:

AN:

841422

Other (OTH)

AF:

0.000174

AC:

AN:

46072

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000160

AC:

AN:

112557

Hom.:

Cov.:

AF XY:

0.000259

AC XY:

AN XY:

34707

show subpopulations

African (AFR)

AF:

0.0000966

AC:

AN:

31046

American (AMR)

AF:

0.00

AC:

AN:

10661

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2650

East Asian (EAS)

AF:

0.000280

AC:

AN:

3572

South Asian (SAS)

AF:

0.000371

AC:

AN:

2699

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6208

Middle Eastern (MID)

AF:

0.00

AC:

AN:

217

European-Non Finnish (NFE)

AF:

0.000244

AC:

AN:

53288

Other (OTH)

AF:

0.00

AC:

AN:

1531

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.0000756

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Mar 12, 2018

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Glycogen storage disease IXa1

Benign:1

Dec 19, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

PHKA2-related disorder

Benign:1

Jul 09, 2019

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.89

CADD

Benign

0.076

(source)

DANN

Benign

0.76

PhyloP100

-3.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Mutation Taster

=99/1

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over