Genetic Variant GDF11:p.Ala35_Ala39dup (chr12-55743400-C-CGCGGCGGCGGCGGCG) – ACMG Classification: Likely_benign (-1 pts)

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP3

The NM_005811.5(GDF11):c.102_116dupGGCGGCGGCGGCGGC(p.Ala35_Ala39dup) variant causes a disruptive inframe insertion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000206 in 145,656 control chromosomes in the GnomAD database, with no homozygous occurrence. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000021 ( 0 hom., cov: 30)

Exomes 𝑓: 0.0000035 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

GDF11
NM_005811.5 disruptive_inframe_insertion

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.392

Publications

0 publications found

Variant links:

Genes affected

GDF11 (HGNC:4216): (growth differentiation factor 11) 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 plays a role in the development of the nervous and other organ systems, and may regulate aging. [provided by RefSeq, Aug 2016]

GDF11 Gene-Disease associations (from GenCC):

vertebral hypersegmentation and orofacial anomalies
Inheritance: Unknown, AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P

GDF11 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

BP3

Nonframeshift variant in repetitive region in NM_005811.5

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005811.5. 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
	GDF11	NM_005811.5	MANE Select	c.102_116dupGGCGGCGGCGGCGGC	p.Ala35_Ala39dup	disruptive_inframe_insertion	Exon 1 of 3	NP_005802.1	O95390

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GDF11	ENST00000257868.10	TSL:1 MANE Select	c.102_116dupGGCGGCGGCGGCGGC	p.Ala35_Ala39dup	disruptive_inframe_insertion	Exon 1 of 3	ENSP00000257868.5	O95390
	GDF11	ENST00000546799.1	TSL:1	c.18_32dupGGCGGCGGCGGCGGC	p.Ala7_Ala11dup	disruptive_inframe_insertion	Exon 1 of 4	ENSP00000448390.1	H0YI30

Frequencies

GnomAD3 genomes

AF:

0.0000206

AC:

AN:

145656

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000493

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000199

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

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000354

AC:

AN:

847110

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

393726

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

15978

American (AMR)

AF:

0.00

AC:

AN:

1414

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

5408

East Asian (EAS)

AF:

0.00

AC:

AN:

4100

South Asian (SAS)

AF:

0.0000574

AC:

AN:

17416

European-Finnish (FIN)

AF:

0.00

AC:

AN:

1290

Middle Eastern (MID)

AF:

0.00

AC:

AN:

1684

European-Non Finnish (NFE)

AF:

0.00000259

AC:

AN:

771830

Other (OTH)

AF:

0.00

AC:

AN:

27990

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.0000000509044), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.308

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000206

AC:

AN:

145656

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

70758

show subpopulations

African (AFR)

AF:

0.0000493

AC:

AN:

40582

American (AMR)

AF:

0.00

AC:

AN:

14722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3384

East Asian (EAS)

AF:

0.000199

AC:

AN:

5032

South Asian (SAS)

AF:

0.00

AC:

AN:

4780

European-Finnish (FIN)

AF:

0.00

AC:

AN:

8316

Middle Eastern (MID)

AF:

0.00

AC:

AN:

312

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

65608

Other (OTH)

AF:

0.00

AC:

AN:

2014

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.442

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.39

Mutation Taster

=67/33

polymorphism

(source)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over