Genetic Variant HMX3:p.Pro46Ser (chr10-123136186-C-T) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

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

The NM_001105574.2(HMX3):c.136C>T(p.Pro46Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000329 in 1,429,432 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P46R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

HMX3
NM_001105574.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.13

Variant links:

Genes affected

HMX3 (HGNC:5019): (H6 family homeobox 3) Predicted to enable DNA-binding transcription factor activity, RNA polymerase II-specific and RNA polymerase II transcription regulatory region sequence-specific DNA binding activity. Predicted to be involved in ear development and regulation of transcription by RNA polymerase II. Predicted to act upstream of or within several processes, including embryo implantation; maternal process involved in female pregnancy; and neuromuscular process controlling balance. Predicted to be part of chromatin. Predicted to be active in nucleus. [provided by Alliance of Genome Resources, Apr 2022]

HMX3 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=0.23498258).

BS2

High AC in GnomAd4 at 20 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HMX3	NM_001105574.2 link	c.136C>T	p.Pro46Ser	missense_variant	Exon 1 of 2	ENST00000357878.7	NP_001099044.1	A6NHT5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HMX3	ENST00000357878.7 link	c.136C>T	p.Pro46Ser	missense_variant	Exon 1 of 2	2	NM_001105574.2	ENSP00000350549.4		A6NHT5

Frequencies

GnomAD3 genomes

AF:

0.000132

AC:

AN:

151370

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00131

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

GnomAD3 exomes

AF:

0.0000266

AC:

AN:

112752

Hom.:

AF XY:

0.0000155

AC XY:

AN XY:

64710

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000746

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000389

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000211

AC:

AN:

1278062

Hom.:

Cov.:

AF XY:

0.0000175

AC XY:

AN XY:

628976

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000218

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:

0.0000176

Gnomad4 OTH exome

AF:

0.0000774

GnomAD4 genome

AF:

0.000132

AC:

AN:

151370

Hom.:

Cov.:

AF XY:

0.000149

AC XY:

AN XY:

73936

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00131

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

ExAC

AF:

0.0000179

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 18, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.136C>T (p.P46S) alteration is located in exon 1 (coding exon 1) of the HMX3 gene. This alteration results from a C to T substitution at nucleotide position 136, causing the proline (P) at amino acid position 46 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.078

BayesDel_addAF

Benign

-0.0036

BayesDel_noAF

Benign

-0.24

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.097

Eigen

Benign

-0.41

Eigen_PC

Benign

-0.24

FATHMM_MKL

Benign

0.65

LIST_S2

Benign

0.54

M_CAP

Pathogenic

0.94

MetaRNN

Benign

0.23

MetaSVM

Benign

-0.64

MutationAssessor

Benign

0.55

PrimateAI

Pathogenic

0.90

PROVEAN

Benign

0.57

REVEL

Benign

0.16

Sift

Benign

0.52

Sift4G

Benign

0.69

Polyphen

0.14

Vest4

0.38

MVP

0.56

MPC

0.76

ClinPred

0.10

GERP RS

3.4

Varity_R

0.067

gMVP

0.54

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