Genetic Variant NHS:p.Gln39Gln (chrX-17375874-G-A) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2BP4_StrongBP6_ModerateBP7

The NM_001291867.2(NHS):c.117G>A(p.Gln39Gln) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000893 in 112,005 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. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.0000020 ( 0 hom. 0 hem. )

Failed GnomAD Quality Control

Consequence

NHS
NM_001291867.2 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 1.10

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 -5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.68).

BP6

Variant X-17375874-G-A is Benign according to our data. Variant chrX-17375874-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 3721665.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=1.1 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NHS	NM_001291867.2 link	c.117G>A	p.Gln39Gln	synonymous_variant	Exon 1 of 9	ENST00000676302.1	NP_001278796.1	Q6T4R5-1
NHS	NM_198270.4 link	c.117G>A	p.Gln39Gln	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.117G>A	p.Gln39Gln	synonymous_variant	Exon 1 of 9		NM_001291867.2	ENSP00000502262.1		Q6T4R5-1
NHS	ENST00000380060.7 link	c.117G>A	p.Gln39Gln	synonymous_variant	Exon 1 of 8	1		ENSP00000369400.3		Q6T4R5-2

Frequencies

GnomAD3 genomes

AF:

0.00000893

AC:

AN:

112005

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000323

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000201

AC:

AN:

996245

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

320511

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:

20965

American (AMR)

AF:

0.00

AC:

AN:

21323

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

15998

East Asian (EAS)

AF:

0.0000835

AC:

AN:

23952

South Asian (SAS)

AF:

0.00

AC:

AN:

43603

European-Finnish (FIN)

AF:

0.00

AC:

AN:

24937

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2680

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

800796

Other (OTH)

AF:

0.00

AC:

AN:

41991

⚠️ 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: 0.275

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000893

AC:

AN:

112005

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34311

show subpopulations

African (AFR)

AF:

0.0000323

AC:

AN:

30965

American (AMR)

AF:

0.00

AC:

AN:

10764

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2653

East Asian (EAS)

AF:

0.00

AC:

AN:

3507

South Asian (SAS)

AF:

0.00

AC:

AN:

2738

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6017

Middle Eastern (MID)

AF:

0.00

AC:

AN:

237

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

52946

Other (OTH)

AF:

0.00

AC:

AN:

1496

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.675

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000189

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Nance-Horan syndrome

Benign:1

Oct 04, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.68

CADD

Benign

6.5

(source)

DANN

Benign

0.94

PhyloP100

1.1

PromoterAI

-0.018

Neutral

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

X-17375874-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over