X-77508430-A-G

Position:

• chrX-77508430-A-G

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM2 PP2 BP4_Moderate BP6_Moderate

The NM_000489.6(ATRX):​c.7400T>C​(p.Met2467Thr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M2467I) has been classified as Benign.

• Frequency: Genomes: not found (cov: 23)
• Consequence: ATRX NM_000489.6 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 6.49

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]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ATRX. . Gene score misZ 3.1025 (greater than the threshold 3.09). GenCC has associacion of gene with alpha thalassemia-X-linked intellectual disability syndrome, ATR-X-related syndrome, intellectual disability-hypotonic facies syndrome, X-linked, 1.
• BP4: Computational evidence support a benign effect (MetaRNN=0.22378996).
• BP6: Variant X-77508430-A-G is Benign according to our data. Variant chrX-77508430-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 1672157.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATRX	NM_000489.6	c.7400T>C	p.Met2467Thr	missense_variant	35/35	ENST00000373344.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATRX	ENST00000373344.11	c.7400T>C	p.Met2467Thr	missense_variant	35/35	1	NM_000489.6	P3

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 23

Bravo AF: 0.00000378

ExAC AF: 0.0000165 AC: 2

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Alpha thalassemia-X-linked intellectual disability syndrome Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 03, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.74
BayesDel_addAF	Benign	0.0059	T
BayesDel_noAF	Uncertain	-0.080
CADD	Benign	23
DANN	Benign	0.76
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.87	D;.
M_CAP	Uncertain	0.14	D
MetaRNN	Benign	0.22	T;T
MetaSVM	Uncertain	0.027	D
MutationTaster	Benign	0.98	D;D
PrimateAI	Uncertain	0.70	T
PROVEAN	Benign	-1.1	N;N
REVEL	Uncertain	0.41
Sift	Uncertain	0.0050	D;D
Sift4G	Uncertain	0.0030	D;D
Vest4		0.17
MutPred		0.21		Gain of relative solvent accessibility (P = 0.005);.;
MVP		0.83
MPC		0.015
ClinPred		0.59	D
GERP RS		3.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.60

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

LitVar

Other links and lift over

dbSNP: rs782631992; hg19: chrX-76763908;