chr8-38445447-C-T

Variant names:

• chr8-38445447-C-T
• rs6474354
• NM_023110.3:c.91+11909G>A

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_023110.3(FGFR1):​c.91+11909G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.226 in 152,054 control chromosomes in the GnomAD database, including 4,064 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.23 (4064 hom., cov: 31)
• Consequence: FGFR1 NM_023110.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.70
• Publications: 9 publications found

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]

FGFR1 Gene-Disease associations (from GenCC):

• encephalocraniocutaneous lipomatosis

  Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
• Hartsfield-Bixler-Demyer syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Ambry Genetics, Orphanet, ClinGen
• hypogonadotropic hypogonadism 2 with or without anosmia

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• osteoglophonic dysplasia

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE, LIMITED Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, Genomics England PanelApp, Orphanet
• Pfeiffer syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• Pfeiffer syndrome type 1

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• Jackson-Weiss syndrome

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• hypogonadotropic hypogonadism

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• isolated trigonocephaly

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Kallmann syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• septooptic dysplasia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• tooth agenesis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• holoprosencephaly

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.278 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_023110.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FGFR1	NM_023110.3	MANE Select	c.91+11909G>A		intron	N/A	NP_075598.2	P11362-1
	FGFR1	NM_001174067.2		c.190+11909G>A		intron	N/A	NP_001167538.1	P11362-21
	FGFR1	NM_001354367.2		c.91+11909G>A		intron	N/A	NP_001341296.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FGFR1	ENST00000447712.7	TSL:1 MANE Select	c.91+11909G>A		intron	N/A	ENSP00000400162.2	P11362-1
	FGFR1	ENST00000425967.8	TSL:1	c.91+11909G>A		intron	N/A	ENSP00000393312.4	A0A8I3B1S4
	FGFR1	ENST00000397091.9	TSL:1	c.91+11909G>A		intron	N/A	ENSP00000380280.5	P11362-7

Frequencies

GnomAD3 genomes AF: 0.226 AC: 34292 AN: 151936 Hom.: 4054 Cov.: 31

Gnomad AFR AF: 0.281

Gnomad AMI AF: 0.0921

Gnomad AMR AF: 0.213

Gnomad ASJ AF: 0.161

Gnomad EAS AF: 0.168

Gnomad SAS AF: 0.188

Gnomad FIN AF: 0.204

Gnomad MID AF: 0.165

Gnomad NFE AF: 0.211

Gnomad OTH AF: 0.204

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.226 AC: 34345 AN: 152054 Hom.: 4064 Cov.: 31 AF XY: 0.224 AC XY: 16661 AN XY: 74322

African (AFR) AF: 0.282 AC: 11685 AN: 41466

American (AMR) AF: 0.212 AC: 3246 AN: 15280

Ashkenazi Jewish (ASJ) AF: 0.161 AC: 559 AN: 3468

East Asian (EAS) AF: 0.168 AC: 871 AN: 5178

South Asian (SAS) AF: 0.188 AC: 904 AN: 4810

European-Finnish (FIN) AF: 0.204 AC: 2157 AN: 10574

Middle Eastern (MID) AF: 0.180 AC: 53 AN: 294

European-Non Finnish (NFE) AF: 0.211 AC: 14355 AN: 67968

Other (OTH) AF: 0.205 AC: 431 AN: 2104

Alfa AF: 0.211 Hom.: 15021

Bravo AF: 0.225

Asia WGS AF: 0.186 AC: 646 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	0.13
DANN	Benign	0.36
PhyloP100		-1.7
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs6474354; hg19: chr8-38302965;