Genetic Variant FGF8:c.*184_*187dupTTTT (chr10-101770141-T-TAAAA) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_033163.5(FGF8):c.*184_*187dupTTTT variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000025 ( 0 hom., cov: 0)

Exomes 𝑓: 0.00037 ( 0 hom. )

Consequence

FGF8
NM_033163.5 3_prime_UTR

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.108

Publications

1 publications found

Variant links:

Genes affected

FGF8 (HGNC:3686): (fibroblast growth factor 8) The protein encoded by this gene is a member of the fibroblast growth factor (FGF) family. FGF family members possess broad mitogenic and cell survival activities, and are involved in a variety of biological processes, including embryonic development, cell growth, morphogenesis, tissue repair, tumor growth and invasion. This protein is known to be a factor that supports androgen and anchorage independent growth of mammary tumor cells. Overexpression of this gene has been shown to increase tumor growth and angiogensis. The adult expression of this gene is restricted to testes and ovaries. Temporal and spatial pattern of this gene expression suggests its function as an embryonic epithelial factor. Studies of the mouse and chick homologs revealed roles in midbrain and limb development, organogenesis, embryo gastrulation and left-right axis determination. The alternative splicing of this gene results in four transcript variants. [provided by RefSeq, Jul 2008]

FGF8 Gene-Disease associations (from GenCC):

hypogonadotropic hypogonadism 6 with or without anosmia
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
hypogonadotropic hypogonadism
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Kallmann syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
holoprosencephaly
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

FGF8 links:

ENSG00000308881 (HGNC:):

ENSG00000308881 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FGF8	NM_033163.5 link	c.184_187dupTTTT		3_prime_UTR_variant	Exon 6 of 6	ENST00000320185.7	NP_149353.1	P55075-4A1A515

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FGF8	ENST00000320185.7 link	c.184_187dupTTTT		3_prime_UTR_variant	Exon 6 of 6	1	NM_033163.5	ENSP00000321797.2		P55075-4

Frequencies

GnomAD3 genomes

AF:

0.0000248

AC:

AN:

120776

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000512

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.000371

AC:

101

AN:

272058

Hom.:

Cov.:

AF XY:

0.000387

AC XY:

AN XY:

139688

show subpopulations

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

African (AFR)

AF:

0.000800

AC:

AN:

7498

American (AMR)

AF:

0.000409

AC:

AN:

9776

Ashkenazi Jewish (ASJ)

AF:

0.000110

AC:

AN:

9068

East Asian (EAS)

AF:

0.0000462

AC:

AN:

21660

South Asian (SAS)

AF:

0.0000661

AC:

AN:

15126

European-Finnish (FIN)

AF:

0.00

AC:

AN:

19692

Middle Eastern (MID)

AF:

0.00

AC:

AN:

1246

European-Non Finnish (NFE)

AF:

0.000461

AC:

AN:

171364

Other (OTH)

AF:

0.000541

AC:

AN:

16628

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.267

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:

0.0000248

AC:

AN:

120776

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

57198

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31572

American (AMR)

AF:

0.00

AC:

AN:

12090

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3022

East Asian (EAS)

AF:

0.00

AC:

AN:

4236

South Asian (SAS)

AF:

0.00

AC:

AN:

3748

European-Finnish (FIN)

AF:

0.00

AC:

AN:

4796

Middle Eastern (MID)

AF:

0.00

AC:

AN:

244

European-Non Finnish (NFE)

AF:

0.0000512

AC:

AN:

58594

Other (OTH)

AF:

0.00

AC:

AN:

1654

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

142

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.11

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over