rs13317

Positions:

• chr8-38411996-T-C

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_023110.3(FGFR1):​c.*1632A>G variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.233 in 230,686 control chromosomes in the GnomAD database, including 6,569 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.23 (4142 hom., cov: 32)
  • Exomes 𝑓: 0.25 (2427 hom.)
• Consequence: FGFR1 NM_023110.3 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:4
• Conservation: PhyloP100: -0.0420

Genes affected

FGFR1 (HGNC:3688): (fibroblast growth factor receptor 1) The protein encoded by this gene is a member of the fibroblast growth factor receptor (FGFR) family, where amino acid sequence is highly conserved between members and throughout evolution. FGFR family members differ from one another in their ligand affinities and tissue distribution. A full-length representative protein consists of an extracellular region, composed of three immunoglobulin-like domains, a single hydrophobic membrane-spanning segment and a cytoplasmic tyrosine kinase domain. The extracellular portion of the protein interacts with fibroblast growth factors, setting in motion a cascade of downstream signals, ultimately influencing mitogenesis and differentiation. This particular family member binds both acidic and basic fibroblast growth factors and is involved in limb induction. Mutations in this gene have been associated with Pfeiffer syndrome, Jackson-Weiss syndrome, Antley-Bixler syndrome, osteoglophonic dysplasia, and autosomal dominant Kallmann syndrome 2. Chromosomal aberrations involving this gene are associated with stem cell myeloproliferative disorder and stem cell leukemia lymphoma syndrome. Alternatively spliced variants which encode different protein isoforms have been described; however, not all variants have been fully characterized. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP6: Variant 8-38411996-T-C is Benign according to our data. Variant chr8-38411996-T-C is described in ClinVar as [Benign]. Clinvar id is 362864.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.328 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGFR1	NM_023110.3	c.*1632A>G		3_prime_UTR_variant	18/18	ENST00000447712.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FGFR1	ENST00000447712.7	c.*1632A>G		3_prime_UTR_variant	18/18	1	NM_023110.3	P4

Frequencies

GnomAD3 genomes AF: 0.226 AC: 34376 AN: 152006 Hom.: 4128 Cov.: 32

Gnomad AFR AF: 0.213

Gnomad AMI AF: 0.370

Gnomad AMR AF: 0.261

Gnomad ASJ AF: 0.143

Gnomad EAS AF: 0.341

Gnomad SAS AF: 0.110

Gnomad FIN AF: 0.193

Gnomad MID AF: 0.222

Gnomad NFE AF: 0.233

Gnomad OTH AF: 0.233

GnomAD4 exome AF: 0.245 AC: 19248 AN: 78562 Hom.: 2427 Cov.: 0 AF XY: 0.242 AC XY: 8805 AN XY: 36346

Gnomad4 AFR exome AF: 0.212

Gnomad4 AMR exome AF: 0.257

Gnomad4 ASJ exome AF: 0.149

Gnomad4 EAS exome AF: 0.358

Gnomad4 SAS exome AF: 0.100

Gnomad4 FIN exome AF: 0.154

Gnomad4 NFE exome AF: 0.237

Gnomad4 OTH exome AF: 0.224

GnomAD4 genome AF: 0.226 AC: 34431 AN: 152124 Hom.: 4142 Cov.: 32 AF XY: 0.221 AC XY: 16468 AN XY: 74364

Gnomad4 AFR AF: 0.214

Gnomad4 AMR AF: 0.261

Gnomad4 ASJ AF: 0.143

Gnomad4 EAS AF: 0.341

Gnomad4 SAS AF: 0.110

Gnomad4 FIN AF: 0.193

Gnomad4 NFE AF: 0.233

Gnomad4 OTH AF: 0.232

Alfa AF: 0.229 Hom.: 5317

Bravo AF: 0.238

Asia WGS AF: 0.222 AC: 772 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, single submitter

Submissions by phenotype

Trigonocephaly 1 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. -

Hypogonadotropic hypogonadism 2 with or without anosmia 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. -

Osteoglophonic dysplasia 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. -

Craniosynostosis syndrome 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	-0.83
CADD	Benign	3.0
DANN	Benign	0.67

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: rs13317; hg19: chr8-38269514;