10-101770514-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PP3_Strong

The NM_033163.5(FGF8):c.550C>T(p.Arg184Cys) variant causes a missense change. The variant allele was found at a frequency of 0.000013 in 1,461,334 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.000013 ( 0 hom. )

Consequence

FGF8
NM_033163.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.84

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 links:

LOC105378457 (HGNC:):

LOC105378457 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.944

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGF8	NM_033163.5 linkuse as main transcript	c.550C>T	p.Arg184Cys	missense_variant	6/6	ENST00000320185.7
LOC105378457	XR_007062268.1 linkuse as main transcript	n.138-43G>A		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FGF8	ENST00000320185.7 linkuse as main transcript	c.550C>T	p.Arg184Cys	missense_variant	6/6	1	NM_033163.5	A2	P55075-4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000160

AC:

AN:

250682

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135662

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.0000469

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000130

AC:

AN:

1461334

Hom.:

Cov.:

AF XY:

0.0000151

AC XY:

AN XY:

727030

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.0000189

Gnomad4 NFE exome

AF:

0.0000117

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000329

Hom.:

Bravo

AF:

0.00000756

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

FGF8-related disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Dec 22, 2022

The FGF8 c.550C>T variant is predicted to result in the amino acid substitution p.Arg184Cys. This variant in the homozygous condition was reported in an individual with hypogonadotropic hypogonadism, idiopathic (Men et al 2019. PubMed ID: 31748124). This variant is reported in 0.0047% of alleles in individuals of European (Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/10-103530271-G-A). A different variant affecting the same amino acid (p.Arg184His) was reported to negatively affect the proliferation of human cardiomyocytes (Zhou. 2020. PubMed ID: 32664970). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.98

BayesDel_addAF

Pathogenic

0.23

BayesDel_noAF

Pathogenic

0.19

Cadd

Pathogenic

Dann

Pathogenic

1.0

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.48

FATHMM_MKL

Uncertain

0.93

LIST_S2

Pathogenic

0.99

D;D;D;D;D

M_CAP

Pathogenic

0.59

MetaRNN

Pathogenic

0.94

D;D;D;D;D

MetaSVM

Pathogenic

0.80

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Pathogenic

0.91

Sift4G

Uncertain

0.0020

D;D;D;D;D

Polyphen

1.0

.;D;D;D;D

Vest4

0.82

MVP

0.92

MPC

2.2

ClinPred

0.98

GERP RS

2.8

Varity_R

0.95

gMVP

0.82

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