X-11298710-G-A

Variant summary

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

The NM_001142.2(AMELX):c.307G>A(p.Val103Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000701 in 1,098,265 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 33 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0 ( 0 hom., 0 hem., cov: 22)

Exomes 𝑓: 0.000070 ( 0 hom. 33 hem. )

Failed GnomAD Quality Control

Consequence

AMELX
NM_001142.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.570

Variant links:

Genes affected

AMELX (HGNC:461): (amelogenin X-linked) This gene encodes a member of the amelogenin family of extracellular matrix proteins. Amelogenins are involved in biomineralization during tooth enamel development. Mutations in this gene cause X-linked amelogenesis imperfecta. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

AMELX links:

ARHGAP6 (HGNC:676): (Rho GTPase activating protein 6) This gene encodes a member of the rhoGAP family of proteins which play a role in the regulation of actin polymerization at the plasma membrane during several cellular processes. This protein is thought to have two independent functions, one as a GTPase-activating protein with specificity for RhoA, and another as a cytoskeletal protein that promotes actin remodeling. Multiple alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ARHGAP6 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=0.069951266).

BS2

High Hemizygotes in GnomAdExome at 7 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AMELX	NM_001142.2 linkuse as main transcript	c.307G>A	p.Val103Ile	missense_variant	5/6	ENST00000380714.7
ARHGAP6	NM_013427.3 linkuse as main transcript	c.589-44003C>T		intron_variant		ENST00000337414.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AMELX	ENST00000380714.7 linkuse as main transcript	c.307G>A	p.Val103Ile	missense_variant	5/6	1	NM_001142.2	P1	Q99217-1
ARHGAP6	ENST00000337414.9 linkuse as main transcript	c.589-44003C>T		intron_variant		1	NM_013427.3	P2	O43182-1

Frequencies

GnomAD3 genomes

AF:

0.00

AC:

AN:

109844

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

32172

FAILED QC

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000708

AC:

AN:

183509

Hom.:

AF XY:

0.000103

AC XY:

AN XY:

67937

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000365

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000210

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000976

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000701

AC:

AN:

1098265

Hom.:

Cov.:

AF XY:

0.0000908

AC XY:

AN XY:

363619

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000284

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000222

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000712

Gnomad4 OTH exome

AF:

0.0000651

GnomAD4 genome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

109844

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

32172

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

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

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.00000378

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000149

AC:

ExAC

AF:

0.0000659

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000356

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 30, 2022

The c.349G>A (p.V117I) alteration is located in exon 6 (coding exon 5) of the AMELX gene. This alteration results from a G to A substitution at nucleotide position 349, causing the valine (V) at amino acid position 117 to be replaced by an isoleucine (I). 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

0.073

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.47

Cadd

Benign

Dann

Benign

0.97

FATHMM_MKL

Benign

0.27

LIST_S2

Benign

0.86

D;D;D

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.070

T;T;T

MetaSVM

Benign

-0.60

MutationTaster

Benign

1.0

D;D;D;D;D;N;N;N

PrimateAI

Benign

0.39

PROVEAN

Benign

-0.28

N;N;N

REVEL

Benign

0.20

Sift

Benign

0.16

T;T;T

Sift4G

Benign

0.41

T;T;T

Polyphen

0.0030

B;B;B

Vest4

0.10

MVP

0.95

MPC

0.18

ClinPred

0.024

GERP RS

0.26

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.070

gMVP

0.36

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