Variant 4-8867740-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_018942.3(HMX1):c.1000G>A(p.Ala334Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000132 in 1,289,814 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000088 ( 0 hom. )

Consequence

HMX1
NM_018942.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 0.495

Variant links:

Genes affected

HMX1 (HGNC:5017): (H6 family homeobox 1) This gene encodes a transcription factor that belongs to the H6 family of homeobox proteins. This protein can bind a 5'-CAAG-3' core DNA sequence, and it is involved in the development of craniofacial structures. Mutations in this gene cause oculoauricular syndrome, a disorder of the eye and external ear. [provided by RefSeq, Oct 2009]

HMX1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.24252382).

BS2

High AC in GnomAd4 at 7 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HMX1	NM_018942.3 linkuse as main transcript	c.1000G>A	p.Ala334Thr	missense_variant	2/2	ENST00000400677.5	NP_061815.2
HMX1	NM_001306142.2 linkuse as main transcript	c.394+3481G>A		intron_variant			NP_001293071.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HMX1	ENST00000400677.5 linkuse as main transcript	c.1000G>A	p.Ala334Thr	missense_variant	2/2	1	NM_018942.3	ENSP00000383516	P1
HMX1	ENST00000506970.2 linkuse as main transcript	c.394+3481G>A		intron_variant		1		ENSP00000446997

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152016

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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

AF:

0.00000879

AC:

AN:

1137798

Hom.:

Cov.:

AF XY:

0.0000109

AC XY:

AN XY:

548726

show subpopulations

Gnomad4 AFR exome

AF:

0.000169

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000370

Gnomad4 SAS exome

AF:

0.0000313

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000314

Gnomad4 OTH exome

AF:

0.0000218

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152016

Hom.:

Cov.:

AF XY:

0.0000539

AC XY:

AN XY:

74246

show subpopulations

Gnomad4 AFR

AF:

0.000121

Gnomad4 AMR

AF:

0.000131

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:

0.00

Bravo

AF:

0.0000718

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 29, 2023

The c.1000G>A (p.A334T) alteration is located in exon 2 (coding exon 2) of the HMX1 gene. This alteration results from a G to A substitution at nucleotide position 1000, causing the alanine (A) at amino acid position 334 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 21, 2022

This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 334 of the HMX1 protein (p.Ala334Thr). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with HMX1-related conditions. ClinVar contains an entry for this variant (Variation ID: 1515302). 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: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.040

BayesDel_noAF

Benign

-0.30

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.082

Eigen

Benign

-0.059

Eigen_PC

Benign

-0.038

FATHMM_MKL

Benign

0.16

LIST_S2

Benign

0.52

M_CAP

Pathogenic

0.39

MetaRNN

Benign

0.24

MetaSVM

Benign

-0.40

MutationAssessor

Benign

0.34

MutationTaster

Benign

1.0

PrimateAI

Pathogenic

0.92

PROVEAN

Benign

-0.77

REVEL

Benign

0.19

Sift

Uncertain

0.024

Sift4G

Benign

0.095

Polyphen

0.96

Vest4

0.23

MVP

0.92

MPC

1.8

ClinPred

0.63

GERP RS

3.9

Varity_R

0.14

gMVP

0.42

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over