rs63751220

Positions:

chr8-96145065-A-G

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_001001557.4(GDF6):c.866T>C(p.Leu289Pro) variant causes a missense change. The variant allele was found at a frequency of 0.000137 in 1,502,488 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00081 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000061 ( 1 hom. )

Consequence

GDF6
NM_001001557.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:1B:2

Conservation

PhyloP100: 5.59

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 Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.039397776).

BP6

Variant 8-96145065-A-G is Benign according to our data. Variant chr8-96145065-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 8372.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GDF6	NM_001001557.4 linkuse as main transcript	c.866T>C	p.Leu289Pro	missense_variant	2/2	ENST00000287020.7	NP_001001557.1	Q6KF10A0A0S2A5D6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GDF6	ENST00000287020.7 linkuse as main transcript	c.866T>C	p.Leu289Pro	missense_variant	2/2	1	NM_001001557.4	ENSP00000287020.4		Q6KF10

Frequencies

GnomAD3 genomes

AF:

0.000811

AC:

123

AN:

151754

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00295

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000656

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:

0.0000636

AC:

AN:

141432

Hom.:

AF XY:

0.0000494

AC XY:

AN XY:

80930

show subpopulations

Gnomad AFR exome

AF:

0.00181

Gnomad AMR exome

AF:

0.00

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000615

AC:

AN:

1350626

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

668560

show subpopulations

Gnomad4 AFR exome

AF:

0.00255

Gnomad4 AMR exome

AF:

0.0000300

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:

0.00000188

Gnomad4 OTH exome

AF:

0.000125

GnomAD4 genome

AF:

0.000810

AC:

123

AN:

151862

Hom.:

Cov.:

AF XY:

0.000674

AC XY:

AN XY:

74222

show subpopulations

Gnomad4 AFR

AF:

0.00294

Gnomad4 AMR

AF:

0.0000655

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:

0.000141

Hom.:

Bravo

AF:

0.000820

ESP6500AA

AF:

0.00132

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000125

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:1Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Klippel-Feil syndrome 1, autosomal dominant

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Aug 01, 2008

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jun 06, 2016

The L289P variant in the GDF6 gene has been reported previously in two unrelated patients with Klippel-Feil syndrome: an adult male with short neck, mirror movements, and left Sprengel anomaly, and a fetus with multiple segmentation abnormalities affecting the entire spine and ribs (Tassabehji et al., 2008). Both cases were said to be sporadic, but there is no evidence that family studies were performed. The L289P variant was not observed at any significant frequency in approximately 4500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The L289P variant is a semi-conservative amino acid substitution, which may impact secondary protein structure as these residues differ in some properties. This substitution occurs at a position that is conserved in mammals, and in silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. A missense variants in a nearby residue, E292D, has been reported in the Human Gene Mutation Database in association with Leber congenital amaurosis (Stenson et al., 2014), supporting the functional importance of this region of the protein. Based on review of the data in the context of the 2015 ACMG standards and guidelines for the interpretation of sequence variants (Richards et al., 2015), we now interpret L289P as a variant of uncertain significance. -

GDF6-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 08, 2024

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

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

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 22, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.78

BayesDel_addAF

Benign

-0.086

BayesDel_noAF

Uncertain

0.10

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.79

D;T

Eigen

Uncertain

0.44

Eigen_PC

Uncertain

0.43

FATHMM_MKL

Uncertain

0.92

LIST_S2

Benign

0.70

T;T

M_CAP

Pathogenic

0.93

MetaRNN

Benign

0.039

T;T

MetaSVM

Uncertain

0.058

MutationAssessor

Uncertain

2.2

M;.

PrimateAI

Pathogenic

0.93

PROVEAN

Pathogenic

-6.2

D;.

REVEL

Pathogenic

0.70

Sift

Uncertain

0.0010

D;.

Sift4G

Uncertain

0.052

T;D

Polyphen

1.0

D;.

Vest4

0.40

MVP

0.94

MPC

2.4

ClinPred

0.41

GERP RS

3.4

Varity_R

0.82

gMVP

0.78

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