X-77663378-T-G

Variant names:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_000489.6(ATRX):c.4120+4A>C variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000492 in 1,208,452 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 191 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00045 ( 0 hom., 20 hem., cov: 23)

Exomes 𝑓: 0.00050 ( 0 hom. 171 hem. )

Consequence

ATRX
NM_000489.6 splice_region, intron

Scores

Splicing: ADA: 0.5305

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:7

Conservation

PhyloP100: 0.230

Publications

1 publications found

Variant links:

Genes affected

ATRX (HGNC:886): (ATRX chromatin remodeler) The protein encoded by this gene contains an ATPase/helicase domain, and thus it belongs to the SWI/SNF family of chromatin remodeling proteins. This protein is found to undergo cell cycle-dependent phosphorylation, which regulates its nuclear matrix and chromatin association, and suggests its involvement in the gene regulation at interphase and chromosomal segregation in mitosis. Mutations in this gene are associated with X-linked syndromes exhibiting cognitive disabilities as well as alpha-thalassemia (ATRX) syndrome. These mutations have been shown to cause diverse changes in the pattern of DNA methylation, which may provide a link between chromatin remodeling, DNA methylation, and gene expression in developmental processes. Multiple alternatively spliced transcript variants encoding distinct isoforms have been reported. [provided by RefSeq, Jul 2017]

ATRX Gene-Disease associations (from GenCC):

alpha thalassemia-X-linked intellectual disability syndrome
Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics
ATR-X-related syndrome
Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
intellectual disability-hypotonic facies syndrome, X-linked, 1
Inheritance: XL Classification: MODERATE Submitted by: Ambry Genetics

ATRX links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.65).

BP6

Variant X-77663378-T-G is Benign according to our data. Variant chrX-77663378-T-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 193997.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000454 (51/112264) while in subpopulation NFE AF = 0.00062 (33/53241). AF 95% confidence interval is 0.000453. There are 0 homozygotes in GnomAd4. There are 20 alleles in the male GnomAd4 subpopulation. Median coverage is 23. This position passed quality control check.

BS2

High Hemizygotes in GnomAd4 at 20 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ATRX	NM_000489.6 link	c.4120+4A>C		splice_region_variant, intron_variant	Intron 12 of 34	ENST00000373344.11	NP_000480.3

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
ATRX	ENST00000373344.11 link	c.4120+4A>C	splice_region_variant, intron_variant	Intron 12 of 34	1	NM_000489.6	ENSP00000362441.4	P46100-1
ATRX	ENST00000395603.7 link	c.4006+4A>C	splice_region_variant, intron_variant	Intron 11 of 33	1		ENSP00000378967.3	P46100-4
ATRX	ENST00000624166.3 link	c.3916+4A>C	splice_region_variant, intron_variant	Intron 12 of 13	1		ENSP00000485103.1	A0A096LNL9
ATRX	ENST00000480283.5 link	n.*3748+4A>C	splice_region_variant, intron_variant	Intron 13 of 35	1		ENSP00000480196.1	A0A087WWG0

Frequencies

GnomAD3 genomes

AF:

0.000455

AC:

AN:

112210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.00278

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000620

Gnomad OTH

AF:

0.000660

GnomAD2 exomes

AF:

0.000485

AC:

AN:

183354

AF XY:

0.000516

show subpopulations

Gnomad AFR exome

AF:

0.0000760

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00244

Gnomad NFE exome

AF:

0.000586

Gnomad OTH exome

AF:

0.000221

GnomAD4 exome

AF:

0.000495

AC:

543

AN:

1096188

Hom.:

Cov.:

AF XY:

0.000473

AC XY:

171

AN XY:

361610

show subpopulations

African (AFR)

AF:

0.0000379

AC:

AN:

26363

American (AMR)

AF:

0.00

AC:

AN:

35202

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19365

East Asian (EAS)

AF:

0.00

AC:

AN:

30188

South Asian (SAS)

AF:

0.0000185

AC:

AN:

54094

European-Finnish (FIN)

AF:

0.00217

AC:

AN:

40496

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4113

European-Non Finnish (NFE)

AF:

0.000514

AC:

432

AN:

840330

Other (OTH)

AF:

0.000456

AC:

AN:

46037

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

Heterozygous variant carriers

106

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<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:

0.000454

AC:

AN:

112264

Hom.:

Cov.:

AF XY:

0.000581

AC XY:

AN XY:

34428

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31000

American (AMR)

AF:

0.00

AC:

AN:

10569

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2649

East Asian (EAS)

AF:

0.00

AC:

AN:

3545

South Asian (SAS)

AF:

0.00

AC:

AN:

2708

European-Finnish (FIN)

AF:

0.00278

AC:

AN:

6117

Middle Eastern (MID)

AF:

0.00

AC:

AN:

218

European-Non Finnish (NFE)

AF:

0.000620

AC:

AN:

53241

Other (OTH)

AF:

0.000651

AC:

AN:

1535

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

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:

0.0000727

Hom.:

Bravo

AF:

0.000261

EpiCase

AF:

0.000545

EpiControl

AF:

0.00107

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:7

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:3

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Oct 17, 2014

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Mar 21, 2019

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Alpha thalassemia-X-linked intellectual disability syndrome

Benign:2

Mar 04, 2020

Natera, Inc.

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:1

May 12, 2015

Genetic Services Laboratory, University of Chicago

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Benign:1

Oct 11, 2017

Ambry Genetics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.65

CADD

Benign

(source)

DANN

Benign

0.79

PhyloP100

0.23

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Mutation Taster

=99/1

polymorphism (auto)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.53

dbscSNV1_RF

Benign

0.49

SpliceAI score (max)

0.11

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