rs875989805

Variant names:

• chrX-17687870-C-T
• rs875989805
• NM_001291867.2:c.694C>T

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_001291867.2(NHS):​c.694C>T​(p.Gln232*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 23)
• Consequence: NHS NM_001291867.2 stop_gained
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 2.52

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]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-17687870-C-T is Pathogenic according to our data. Variant chrX-17687870-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 225896.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chrX-17687870-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NHS	NM_001291867.2	c.694C>T	p.Gln232*	stop_gained	Exon 2 of 9	ENST00000676302.1	NP_001278796.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NHS	ENST00000676302.1	c.694C>T	p.Gln232*	stop_gained	Exon 2 of 9		NM_001291867.2	ENSP00000502262.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 23

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Nance-Horan syndrome Pathogenic:1

Jan 01, 2015

Center for Human Genetics, University of Leuven

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: literature only

- -

NHS-related disorder Pathogenic:1

May 30, 2024

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

The NHS c.694C>T variant is predicted to result in premature protein termination (p.Gln232*). This variant, previously reported as p.Q55X, has been documented in patients with Nance-Horan syndrome, including a female patient (Patient 5 in Fieremans et al 2016. PubMed ID: 27159028; Additional file 4 in Ling et al. 2019. PubMed ID: 30642278). This variant has not been reported in a large population database, indicating this variant is rare. Nonsense variants in NHS are expected to be pathogenic. This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.62
CADD	Pathogenic	36
DANN	Uncertain	1.0
FATHMM_MKL	Uncertain	0.90	D
Vest4		0.97
GERP RS		5.6

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.14		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs875989805; hg19: chrX-17705990;