rs781820428

Positions:

• chrX-77683808-T-A
• chrX-77683808-T-C
• chrX-77683808-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The ENST00000373344.11(ATRX):​c.1448A>T​(p.Gln483Leu) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q483P) has been classified as Benign.

• Frequency: Genomes: not found (cov: 23)
• Consequence: ATRX ENST00000373344.11 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.24

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 Uncertain_significance. Variant got 2 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=0.27729455).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ATRX	NM_000489.6	c.1448A>T	p.Gln483Leu	missense_variant	9/35	ENST00000373344.11	NP_000480.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ATRX	ENST00000373344.11	c.1448A>T	p.Gln483Leu	missense_variant	9/35	1	NM_000489.6	ENSP00000362441	P3

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 23

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.093
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Benign	20
DANN	Benign	0.96
DEOGEN2	Benign	0.059	.;.;T;T;.
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Benign	0.84	T;.;T;T;T
M_CAP	Pathogenic	0.52	D
MetaRNN	Benign	0.28	T;T;T;T;T
MetaSVM	Uncertain	0.58	D
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-2.0	N;N;.;.;.
REVEL	Uncertain	0.41
Sift	Uncertain	0.0040	D;D;.;.;.
Sift4G	Benign	0.23	T;T;T;.;T
Polyphen		0.094	B;.;.;.;.
Vest4		0.26
MutPred		0.092		Loss of methylation at K487 (P = 0.0381);.;.;Loss of methylation at K487 (P = 0.0381);.;
MVP		0.58
MPC		0.056
ClinPred		0.55	D
GERP RS		4.9
gMVP		0.16

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

No publications associated with this variant yet.

Other links and lift over

hg19: chrX-76939300;