8-96160438-C-T

Variant names:

• chr8-96160438-C-T
• rs112296824
• NM_001001557.4:c.255G>A

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001001557.4(GDF6):​c.255G>A​(p.Pro85Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. P85P) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: GDF6 NM_001001557.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.983
• Publications: 3 publications found

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 Gene-Disease associations (from GenCC):

• Klippel-Feil syndrome 1, autosomal dominant

  Inheritance: AD Classification: DEFINITIVE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• microphthalmia

  Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
• multiple synostoses syndrome 4

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• isolated Klippel-Feil syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Leber congenital amaurosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• isolated microphthalmia 4

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
• Leber congenital amaurosis 17

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.57).
• BP7: Synonymous conserved (PhyloP=-0.983 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001001557.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GDF6	NM_001001557.4	MANE Select	c.255G>A	p.Pro85Pro	synonymous	Exon 1 of 2	NP_001001557.1	Q6KF10

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GDF6	ENST00000287020.7	TSL:1 MANE Select	c.255G>A	p.Pro85Pro	synonymous	Exon 1 of 2	ENSP00000287020.4	Q6KF10

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00 AC: 0 AN: 247486 AF XY: 0.00

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.57
CADD	Benign	5.1
DANN	Benign	0.94
PhyloP100		-0.98
PromoterAI		0.0093	Neutral

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

Other links and lift over

dbSNP: rs112296824; hg19: chr8-97172666; COSMIC: COSV99748236;