dbSNP rs794726961: NHS:p.Val49Val (chrX-17375904-C-A) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7

The NM_001291867.2(NHS):c.147C>A(p.Val49Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000102 in 984,554 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. V49V) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 23)

Exomes 𝑓: 0.0000010 ( 0 hom. 0 hem. )

Consequence

NHS
NM_001291867.2 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.0450

Publications

0 publications found

Variant links:

Genes affected

NHS (HGNC:7820): (NHS actin remodeling regulator) This gene encodes a protein containing four conserved nuclear localization signals. The encoded protein functions in eye, tooth, craniofacial and brain development, and it can regulate actin remodeling and cell morphology. Mutations in this gene have been shown to cause Nance-Horan syndrome, and also X-linked cataract-40. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, May 2014]

NHS Gene-Disease associations (from GenCC):

Nance-Horan syndrome
Inheritance: XL Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: ClinGen, Orphanet, G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
early-onset nuclear cataract
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

NHS links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

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

BP7

Synonymous conserved (PhyloP=-0.045 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NHS	NM_001291867.2 link	c.147C>A	p.Val49Val	synonymous_variant	Exon 1 of 9	ENST00000676302.1	NP_001278796.1	Q6T4R5-1
NHS	NM_198270.4 link	c.147C>A	p.Val49Val	synonymous_variant	Exon 1 of 8		NP_938011.1	Q6T4R5-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NHS	ENST00000676302.1 link	c.147C>A	p.Val49Val	synonymous_variant	Exon 1 of 9		NM_001291867.2	ENSP00000502262.1		Q6T4R5-1
NHS	ENST00000380060.7 link	c.147C>A	p.Val49Val	synonymous_variant	Exon 1 of 8	1		ENSP00000369400.3		Q6T4R5-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000102

AC:

AN:

984554

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

315908

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

20609

American (AMR)

AF:

0.00

AC:

AN:

19591

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

15904

East Asian (EAS)

AF:

0.00

AC:

AN:

22700

South Asian (SAS)

AF:

0.0000235

AC:

AN:

42496

European-Finnish (FIN)

AF:

0.00

AC:

AN:

24782

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2666

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

794450

Other (OTH)

AF:

0.00

AC:

AN:

41356

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.65

CADD

Benign

8.8

(source)

DANN

Benign

0.85

PhyloP100

-0.045

PromoterAI

-0.046

Neutral

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over