Genetic Variant FAM20A:p.Ser115Ser (chr17-68600322-C-G) – ACMG Classification: Benign (-11 pts)

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_StrongBP6_ModerateBP7BS1

The NM_017565.4(FAM20A):c.345G>C(p.Ser115Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000339 in 1,590,192 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★). Synonymous variant affecting the same amino acid position (i.e. S115S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0019 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00017 ( 1 hom. )

Consequence

FAM20A
NM_017565.4 synonymous

Scores

Clinical Significance

Benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.149

Publications

5 publications found

Variant links:

Genes affected

FAM20A (HGNC:23015): (FAM20A golgi associated secretory pathway pseudokinase) This locus encodes a protein that is likely secreted and may function in hematopoiesis. A mutation at this locus has been associated with amelogenesis imperfecta and gingival hyperplasia syndrome. Alternatively spliced transcript variants have been identified. [provided by RefSeq, Aug 2011]

FAM20A links:

LINC01482 (HGNC:51128): (long intergenic non-protein coding RNA 1482)

LINC01482 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -11 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.47).

BP6

Variant 17-68600322-C-G is Benign according to our data. Variant chr17-68600322-C-G is described in ClinVar as Benign. ClinVar VariationId is 734418.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=0.149 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00191 (291/152184) while in subpopulation AFR AF = 0.00674 (280/41538). AF 95% confidence interval is 0.00609. There are 1 homozygotes in GnomAd4. There are 158 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FAM20A	NM_017565.4 link	c.345G>C	p.Ser115Ser	synonymous_variant	Exon 1 of 11	ENST00000592554.2	NP_060035.2	Q96MK3L8B8N7Q8IYA5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FAM20A	ENST00000592554.2 link	c.345G>C	p.Ser115Ser	synonymous_variant	Exon 1 of 11	1	NM_017565.4	ENSP00000468308.1		Q96MK3

Frequencies

GnomAD3 genomes

AF:

0.00191

AC:

290

AN:

152066

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00674

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000523

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:

0.0000147

Gnomad OTH

AF:

0.000955

GnomAD2 exomes

AF:

0.000398

AC:

AN:

201240

AF XY:

0.000336

show subpopulations

Gnomad AFR exome

AF:

0.00656

Gnomad AMR exome

AF:

0.000226

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000117

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000172

AC:

248

AN:

1438008

Hom.:

Cov.:

AF XY:

0.000140

AC XY:

100

AN XY:

713210

show subpopulations

African (AFR)

AF:

0.00645

AC:

212

AN:

32876

American (AMR)

AF:

0.000191

AC:

AN:

41834

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25622

East Asian (EAS)

AF:

0.00

AC:

AN:

38170

South Asian (SAS)

AF:

0.0000121

AC:

AN:

82546

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50946

Middle Eastern (MID)

AF:

0.000175

AC:

AN:

5730

European-Non Finnish (NFE)

AF:

0.00000636

AC:

AN:

1100812

Other (OTH)

AF:

0.000319

AC:

AN:

59472

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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:

0.00191

AC:

291

AN:

152184

Hom.:

Cov.:

AF XY:

0.00212

AC XY:

158

AN XY:

74402

show subpopulations

African (AFR)

AF:

0.00674

AC:

280

AN:

41538

American (AMR)

AF:

0.000523

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5122

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67984

Other (OTH)

AF:

0.000945

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.511

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:

0.0000177

Hom.:

623

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Nov 11, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.47

CADD

Benign

(source)

DANN

Benign

0.89

PhyloP100

0.15

Mutation Taster

=100/0

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over