13-21671742-A-G

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP4_Strong BP6_Moderate BS2

The NM_002010.3(FGF9):c.-171A>G variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00212 in 722,850 control chromosomes in the GnomAD database, including 8 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0044 (3 hom., cov: 32)
  • Exomes 𝑓: 0.0015 (5 hom.)
• Consequence: FGF9 NM_002010.3 5_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 3.38

Genes affected

FGF9 (HGNC:3687): (fibroblast growth factor 9) 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 was isolated as a secreted factor that exhibits a growth-stimulating effect on cultured glial cells. In nervous system, this protein is produced mainly by neurons and may be important for glial cell development. Expression of the mouse homolog of this gene was found to be dependent on Sonic hedgehog (Shh) signaling. Mice lacking the homolog gene displayed a male-to-female sex reversal phenotype, which suggested a role in testicular embryogenesis. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.54).
• BP6: Variant 13-21671742-A-G is Benign according to our data. Variant chr13-21671742-A-G is described in ClinVar as [Benign]. Clinvar id is 311413.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS2: High AC in GnomAd at 659 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGF9	NM_002010.3	c.-171A>G		5_prime_UTR_variant	1/3	ENST00000382353.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FGF9	ENST00000382353.6	c.-171A>G		5_prime_UTR_variant	1/3	1	NM_002010.3	P1

Frequencies

GnomAD3 genomes AF: 0.00433 AC: 659 AN: 152242 Hom.: 3 Cov.: 32

Gnomad AFR AF: 0.0103

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00955

Gnomad ASJ AF: 0.00317

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0190

Gnomad NFE AF: 0.000823

Gnomad OTH AF: 0.00669

GnomAD4 exome AF: 0.00152 AC: 865 AN: 570490 Hom.: 5 Cov.: 7 AF XY: 0.00148 AC XY: 445 AN XY: 300244

Gnomad4 AFR exome AF: 0.0103

Gnomad4 AMR exome AF: 0.00455

Gnomad4 ASJ exome AF: 0.00285

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000215

Gnomad4 FIN exome AF: 0.0000293

Gnomad4 NFE exome AF: 0.00102

Gnomad4 OTH exome AF: 0.00408

GnomAD4 genome AF: 0.00436 AC: 665 AN: 152360 Hom.: 3 Cov.: 32 AF XY: 0.00419 AC XY: 312 AN XY: 74508

Gnomad4 AFR AF: 0.0104

Gnomad4 AMR AF: 0.00954

Gnomad4 ASJ AF: 0.00317

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000823

Gnomad4 OTH AF: 0.00662

Alfa AF: 0.00326 Hom.: 0

Bravo AF: 0.00541

Asia WGS AF: 0.00115 AC: 4 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Multiple synostoses syndrome 3 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.54
Cadd	Benign	16
Dann	Benign	0.86

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: rs149762079; hg19: chr13-22245881;