X-17375893-C-G

Position:

• chrX-17375893-C-G

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_001291867.2(NHS):​c.136C>G​(p.Leu46Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000708 in 989,254 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 3 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 12/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0000071 (0 hom. 3 hem.)
• Consequence: NHS NM_001291867.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.32

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 Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0921877).
• BS2: High Hemizygotes in GnomAdExome4 at 3 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NHS	NM_001291867.2	c.136C>G	p.Leu46Val	missense_variant	1/9	ENST00000676302.1
NHS	NM_198270.4	c.136C>G	p.Leu46Val	missense_variant	1/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NHS	ENST00000676302.1	c.136C>G	p.Leu46Val	missense_variant	1/9		NM_001291867.2	P4
NHS	ENST00000380060.7	c.136C>G	p.Leu46Val	missense_variant	1/8	1		A2

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 0.00000708 AC: 7 AN: 989254 Hom.: 0 Cov.: 31 AF XY: 0.00000946 AC XY: 3 AN XY: 317030

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000878

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Nance-Horan syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 18, 2022

Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with NHS-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces leucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 46 of the NHS protein (p.Leu46Val). 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
BayesDel_addAF	Benign	-0.42	T
BayesDel_noAF	Benign	-0.85
CADD	Benign	7.7
DANN	Benign	0.52
FATHMM_MKL	Benign	0.14	N
LIST_S2	Benign	0.32	T
M_CAP	Benign	0.0043	T
MetaRNN	Benign	0.092	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.0	N
MutationTaster	Benign	1.0	N
PrimateAI	Pathogenic	0.88	D
PROVEAN	Benign	0.030	N
REVEL	Benign	0.030
Sift	Benign	0.17	T
Sift4G	Benign	0.15	T
Vest4		0.084
MutPred		0.12		Loss of helix (P = 0.079);
MVP		0.26
MPC		0.35
ClinPred		0.063	T
GERP RS		3.3
gMVP		0.031

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

LitVar

Other links and lift over

dbSNP: rs1401931825; hg19: chrX-17394016;