chr14-74239723-C-A

Position:

• chr14-74239723-C-A

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_Strong BP6 BS1 BS2

The NM_182894.3(VSX2):​c.162C>A​(p.Asp54Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000511 in 1,549,210 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.0024 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00030 (2 hom.)
• Consequence: VSX2 NM_182894.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:3
• Conservation: PhyloP100: 1.12

Genes affected

VSX2 (HGNC:1975): (visual system homeobox 2) This gene encodes a homeobox protein originally described as a retina-specific transcription factor. Mutations in this gene are associated with microphthalmia, cataracts and iris abnormalities. [provided by RefSeq, Oct 2009]

ACMG classification

Verdict is Benign. Variant got -13 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0077951252).
• BP6: Variant 14-74239723-C-A is Benign according to our data. Variant chr14-74239723-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 468358.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2}.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00241 (367/152316) while in subpopulation AFR AF= 0.00818 (340/41568). AF 95% confidence interval is 0.00746. There are 0 homozygotes in gnomad4. There are 175 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
VSX2	NM_182894.3	c.162C>A	p.Asp54Glu	missense_variant	1/5	ENST00000261980.3	NP_878314.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
VSX2	ENST00000261980.3	c.162C>A	p.Asp54Glu	missense_variant	1/5	1	NM_182894.3	ENSP00000261980	P1

Frequencies

GnomAD3 genomes AF: 0.00241 AC: 367 AN: 152198 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00820

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00144

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: 0.00239

GnomAD3 exomes AF: 0.000570 AC: 83 AN: 145736 Hom.: 1 AF XY: 0.000432 AC XY: 34 AN XY: 78688

Gnomad AFR exome AF: 0.00917

Gnomad AMR exome AF: 0.000735

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000442

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000187

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000304 AC: 425 AN: 1396894 Hom.: 2 Cov.: 32 AF XY: 0.000277 AC XY: 191 AN XY: 688882

Gnomad4 AFR exome AF: 0.0101

Gnomad4 AMR exome AF: 0.000729

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000252

Gnomad4 SAS exome AF: 0.0000631

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000111

Gnomad4 OTH exome AF: 0.000864

GnomAD4 genome AF: 0.00241 AC: 367 AN: 152316 Hom.: 0 Cov.: 33 AF XY: 0.00235 AC XY: 175 AN XY: 74484

Gnomad4 AFR AF: 0.00818

Gnomad4 AMR AF: 0.00144

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00237

Alfa AF: 0.000168 Hom.: 0

Bravo AF: 0.00273

ESP6500AA AF: 0.00575 AC: 21

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.000353 AC: 28

Asia WGS AF: 0.00115 AC: 4 AN: 3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:3

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Isolated microphthalmia 2 Uncertain:1 Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Microphthalmia, isolated, with coloboma 3 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Microphthalmia Benign:1

Likely benign, no assertion criteria provided

clinical testing

Natera, Inc.

Sep 16, 2020

- -

VSX2-related disorder Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Sep 23, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Benign	-0.48	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	16
DANN	Uncertain	0.98
DEOGEN2	Benign	0.13	T
Eigen	Benign	-0.74
Eigen_PC	Benign	-0.51
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.48	T
MetaRNN	Benign	0.0078	T
MetaSVM	Benign	-0.61	T
MutationAssessor	Benign	-0.23	N
MutationTaster	Benign	0.86	D
PrimateAI	Uncertain	0.72	T
PROVEAN	Benign	-0.070	N
REVEL	Benign	0.22
Sift	Benign	0.66	T
Sift4G	Benign	0.68	T
Polyphen		0.0020	B
Vest4		0.14
MutPred		0.22		Gain of disorder (P = 0.0954);
MVP		0.88
MPC		0.21
ClinPred		0.0072	T
GERP RS		3.9
Varity_R		0.089
gMVP		0.30

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: rs61747367; hg19: chr14-74706426;