chrX-77682964-C-G

Variant names:

• chrX-77682964-C-G
• rs1557139933
• NM_000489.6:c.2292G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000489.6(ATRX):​c.2292G>C​(p.Leu764Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000414 in 1,208,342 control chromosomes in the GnomAD database, including 1 homozygotes. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000090 (0 hom., 0 hem., cov: 22)
  • Exomes 𝑓: 0.0000036 (1 hom. 0 hem.)
• Consequence: ATRX NM_000489.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -2.08
• Publications: 0 publications found

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: Orphanet, G2P, Labcorp Genetics (formerly Invitae), 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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.10501158).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000489.6. 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
	ATRX	NM_000489.6	MANE Select	c.2292G>C	p.Leu764Phe	missense	Exon 9 of 35	NP_000480.3
	ATRX	NM_138270.5		c.2178G>C	p.Leu726Phe	missense	Exon 8 of 34	NP_612114.2	P46100-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ATRX	ENST00000373344.11	TSL:1 MANE Select	c.2292G>C	p.Leu764Phe	missense	Exon 9 of 35	ENSP00000362441.4	P46100-1
	ATRX	ENST00000395603.7	TSL:1	c.2178G>C	p.Leu726Phe	missense	Exon 8 of 34	ENSP00000378967.3	P46100-4
	ATRX	ENST00000624166.3	TSL:1	c.2088G>C	p.Leu696Phe	missense	Exon 9 of 14	ENSP00000485103.1	A0A096LNL9

Frequencies

GnomAD3 genomes AF: 0.00000903 AC: 1 AN: 110753 Hom.: 0 Cov.: 22

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: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000189

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000364 AC: 4 AN: 1097589 Hom.: 1 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 363017

African (AFR) AF: 0.00 AC: 0 AN: 26382

American (AMR) AF: 0.00 AC: 0 AN: 35207

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19376

East Asian (EAS) AF: 0.00 AC: 0 AN: 30190

South Asian (SAS) AF: 0.0000185 AC: 1 AN: 54119

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40519

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4127

European-Non Finnish (NFE) AF: 0.00000356 AC: 3 AN: 841598

Other (OTH) AF: 0.00 AC: 0 AN: 46071

GnomAD4 genome AF: 0.00000903 AC: 1 AN: 110753 Hom.: 0 Cov.: 22 AF XY: 0.00 AC XY: 0 AN XY: 33013

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 30465

American (AMR) AF: 0.00 AC: 0 AN: 10355

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2633

East Asian (EAS) AF: 0.00 AC: 0 AN: 3557

South Asian (SAS) AF: 0.00 AC: 0 AN: 2646

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 5850

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 239

European-Non Finnish (NFE) AF: 0.0000189 AC: 1 AN: 52840

Other (OTH) AF: 0.00 AC: 0 AN: 1486

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.0000660 Hom.: 0

Bravo AF: 0.00000756

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Alpha thalassemia-X-linked intellectual disability syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.080
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.49
CADD	Benign	11
DANN	Benign	0.87
DEOGEN2	Benign	0.042	T
FATHMM_MKL	Benign	0.23	N
LIST_S2	Benign	0.76	T
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.11	T
MetaSVM	Benign	-0.39	T
PhyloP100		-2.1
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-0.35	N
REVEL	Benign	0.19
Sift	Uncertain	0.0050	D
Sift4G	Benign	0.72	T
Polyphen		0.020	B
Vest4		0.055
MutPred		0.092		Gain of methylation at K762 (P = 0.0913)
MVP		0.59
MPC		0.025
ClinPred		0.068	T
GERP RS		-0.64
gMVP		0.11
Mutation Taster		=95/5	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: rs1557139933; hg19: chrX-76938456;