Genetic Variant NHS:p.Ala115_Ala117dup (chrX-17376088-T-TCGGCGGCGG) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2

The NM_001291867.2(NHS):c.342_350dupGGCGGCGGC(p.Ala115_Ala117dup) variant causes a disruptive inframe insertion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000835 in 1,078,392 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000091 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.0000083 ( 0 hom. 1 hem. )

Consequence

NHS
NM_001291867.2 disruptive_inframe_insertion

Scores

Not classified

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.485

Publications

1 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 -4 ACMG points.

BS2

High AC in GnomAdExome4 at 8 XL,AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NHS	NM_001291867.2 link	c.342_350dupGGCGGCGGC	p.Ala115_Ala117dup	disruptive_inframe_insertion	Exon 1 of 9	ENST00000676302.1	NP_001278796.1	Q6T4R5-1
NHS	NM_198270.4 link	c.342_350dupGGCGGCGGC	p.Ala115_Ala117dup	disruptive_inframe_insertion	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.342_350dupGGCGGCGGC	p.Ala115_Ala117dup	disruptive_inframe_insertion	Exon 1 of 9		NM_001291867.2	ENSP00000502262.1		Q6T4R5-1
NHS	ENST00000380060.7 link	c.342_350dupGGCGGCGGC	p.Ala115_Ala117dup	disruptive_inframe_insertion	Exon 1 of 8	1		ENSP00000369400.3		Q6T4R5-2

Frequencies

GnomAD3 genomes

AF:

0.00000906

AC:

AN:

110367

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:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000191

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000826

AC:

AN:

968025

Hom.:

Cov.:

AF XY:

0.00000326

AC XY:

AN XY:

306971

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

20409

American (AMR)

AF:

0.00

AC:

AN:

16638

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

15684

East Asian (EAS)

AF:

0.00

AC:

AN:

22135

South Asian (SAS)

AF:

0.0000254

AC:

AN:

39293

European-Finnish (FIN)

AF:

0.00

AC:

AN:

24428

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2701

European-Non Finnish (NFE)

AF:

0.00000763

AC:

AN:

786023

Other (OTH)

AF:

0.0000246

AC:

AN:

40714

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.432

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

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

GnomAD4 genome

AF:

0.00000906

AC:

AN:

110367

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33339

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30340

American (AMR)

AF:

0.00

AC:

AN:

10615

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2620

East Asian (EAS)

AF:

0.00

AC:

AN:

3428

South Asian (SAS)

AF:

0.00

AC:

AN:

2676

European-Finnish (FIN)

AF:

0.00

AC:

AN:

5829

Middle Eastern (MID)

AF:

0.00

AC:

AN:

234

European-Non Finnish (NFE)

AF:

0.0000191

AC:

AN:

52473

Other (OTH)

AF:

0.00

AC:

AN:

1475

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Nance-Horan syndrome

Uncertain:1

Nov 16, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant, c.342_350dup, results in the insertion of 3 amino acid(s) of the NHS protein (p.Ala115_Ala117dup), but otherwise preserves the integrity of the reading frame. This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with NHS-related conditions. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.48

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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X-17376088-TCGGCGGCGG-TCGGCGGCGGCGGCGGCGG

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over