chr5-44305009-C-T

Position:

• chr5-44305009-C-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 2P and 7B. PM1 BP4_Moderate BS1_Supporting BS2

The NM_004465.2(FGF10):​c.613G>A​(p.Val205Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000547 in 1,461,626 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: FGF10 NM_004465.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.18

Genes affected

FGF10 (HGNC:3666): (fibroblast growth factor 10) 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 exhibits mitogenic activity for keratinizing epidermal cells, but essentially no activity for fibroblasts, which is similar to the biological activity of FGF7. Studies of the mouse homolog of suggested that this gene is required for embryonic epidermal morphogenesis including brain development, lung morphogenesis, and initiation of lim bud formation. This gene is also implicated to be a primary factor in the process of wound healing. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• PM1: In a chain Fibroblast growth factor 10 (size 170) in uniprot entity FGF10_HUMAN there are 9 pathogenic changes around while only 2 benign (82%) in NM_004465.2
• BP4: Computational evidence support a benign effect (MetaRNN=0.15874442).
• BS1: Variant frequency is greater than expected in population amr. gnomad4_exome allele frequency = 0.00000547 (8/1461626) while in subpopulation AMR AF= 0.000179 (8/44720). AF 95% confidence interval is 0.0000886. There are 0 homozygotes in gnomad4_exome. There are 3 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGF10	NM_004465.2	c.613G>A	p.Val205Met	missense_variant	3/3	ENST00000264664.5
FGF10	XM_005248264.5	c.613G>A	p.Val205Met	missense_variant	4/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FGF10	ENST00000264664.5	c.613G>A	p.Val205Met	missense_variant	3/3	1	NM_004465.2	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000318 AC: 8 AN: 251360 Hom.: 0 AF XY: 0.0000221 AC XY: 3 AN XY: 135842

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000231

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461626 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727120

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000179

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.0000151

ExAC AF: 0.0000165 AC: 2

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 24, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. This variant has not been reported in the literature in individuals affected with FGF10-related conditions. This variant is present in population databases (rs773535125, gnomAD 0.02%). This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 205 of the FGF10 protein (p.Val205Met). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	16
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.42	T
Eigen	Benign	-0.055
Eigen_PC	Benign	0.076
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.034	D
MetaRNN	Benign	0.16	T
MetaSVM	Uncertain	0.24	D
MutationAssessor	Benign	0.78	N
MutationTaster	Benign	0.85	D
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	-0.67	N
REVEL	Benign	0.24
Sift	Uncertain	0.015	D
Sift4G	Uncertain	0.027	D
Polyphen		0.045	B
Vest4		0.11
MutPred		0.28		Gain of disorder (P = 0.0461);
MVP		0.71
MPC		1.3
ClinPred		0.081	T
GERP RS		5.0
Varity_R		0.10
gMVP		0.48

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

Other links and lift over

dbSNP: rs773535125; hg19: chr5-44305111;