8-96145173-T-A

Position:

chr8-96145173-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 0P and 0B.

The NM_001001557.4(GDF6):c.758A>T(p.Gln253Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000004 in 1,499,556 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. Q253R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000022 ( 0 hom. )

Consequence

GDF6
NM_001001557.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter P:1U:1

Conservation

PhyloP100: 0.280

Variant links:

Genes affected

GDF6 (HGNC:4221): (growth differentiation factor 6) This gene encodes a secreted ligand of the TGF-beta (transforming growth factor-beta) superfamily of proteins. Ligands of this family bind various TGF-beta receptors leading to recruitment and activation of SMAD family transcription factors that regulate gene expression. The encoded preproprotein is proteolytically processed to generate each subunit of the disulfide-linked homodimer. This protein is required for normal formation of some bones and joints in the limbs, skull, and axial skeleton. Mutations in this gene are associated with Klippel-Feil syndrome, microphthalmia, and Leber congenital amaurosis. [provided by RefSeq, Sep 2016]

GDF6 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GDF6	NM_001001557.4 linkuse as main transcript	c.758A>T	p.Gln253Leu	missense_variant	2/2	ENST00000287020.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GDF6	ENST00000287020.7 linkuse as main transcript	c.758A>T	p.Gln253Leu	missense_variant	2/2	1	NM_001001557.4	P1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152084

Hom.:

Cov.:

show subpopulations

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:

0.000621

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000199

AC:

AN:

100520

Hom.:

AF XY:

0.00

AC XY:

AN XY:

56582

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000107

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000223

AC:

AN:

1347364

Hom.:

Cov.:

AF XY:

0.00000301

AC XY:

AN XY:

664470

show subpopulations

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:

0.0000267

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000178

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152192

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74398

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000621

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.0000224

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Isolated microphthalmia 4

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Mar 15, 2009

- -

Klippel-Feil syndrome 1, autosomal dominant;C2751307:Isolated microphthalmia 4;C3150968:Microphthalmia, isolated, with coloboma 6;C3715164:Leber congenital amaurosis 17

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 18, 2021

This sequence change replaces glutamine with leucine at codon 253 of the GDF6 protein (p.Gln253Leu). The glutamine residue is moderately conserved and there is a moderate physicochemical difference between glutamine and leucine. While this variant is present in population databases (rs121909355), the frequency information is unreliable, as metrics indicate poor data quality at this position in the ExAC database. This missense change has been observed in individual(s) with microphthalmia (PMID: 19129173). ClinVar contains an entry for this variant (Variation ID: 8375). 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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.086

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.28

CADD

Benign

DANN

Benign

0.90

DEOGEN2

Benign

0.34

T;T

Eigen

Benign

-0.61

Eigen_PC

Benign

-0.55

FATHMM_MKL

Benign

0.28

LIST_S2

Benign

0.39

T;T

M_CAP

Pathogenic

0.41

MetaRNN

Uncertain

0.43

T;T

MetaSVM

Benign

-0.89

MutationAssessor

Benign

1.1

L;.

MutationTaster

Benign

4.2e-7

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

-0.73

N;.

REVEL

Benign

0.27

Sift

Benign

0.45

T;.

Sift4G

Benign

0.79

T;T

Polyphen

0.0010

B;.

Vest4

0.16

MutPred

0.39

Loss of solvent accessibility (P = 0.0128);Loss of solvent accessibility (P = 0.0128);

MVP

0.92

MPC

0.88

ClinPred

0.041

GERP RS

-0.55

Varity_R

0.081

gMVP

0.39

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