rs1057519898

Positions:

• chr8-38417333-T-C

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM1 PM2 PM5 PP2 PP3_Strong

The NM_023110.3(FGFR1):​c.1636A>G​(p.Asn546Asp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N546K) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FGFR1 NM_023110.3 missense
• Clinical Significance: Likely pathogenic no assertion criteria provided P:5
• Conservation: PhyloP100: 8.00

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 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 11 ACMG points.

• PM1: In a domain Protein kinase (size 289) in uniprot entity FGFR1_HUMAN there are 78 pathogenic changes around while only 2 benign (98%) in NM_023110.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr8-38417331-G-T is described in Lovd as [Pathogenic].
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), FGFR1. . Gene score misZ 2.4852 (greater than the threshold 3.09). Trascript score misZ 4.2642 (greater than threshold 3.09). GenCC has associacion of gene with hypogonadotropic hypogonadism 2 with or without anosmia, encephalocraniocutaneous lipomatosis, hypogonadotropic hypogonadism, tooth agenesis, isolated trigonocephaly, Pfeiffer syndrome type 1, Jackson-Weiss syndrome, Pfeiffer syndrome, Kallmann syndrome, septooptic dysplasia, hypogonadotropic hypogonadism 7 with or without anosmia, holoprosencephaly, osteoglophonic dwarfism, Hartsfield-Bixler-Demyer syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.977

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FGFR1	NM_023110.3	c.1636A>G	p.Asn546Asp	missense_variant	12/18	ENST00000447712.7	NP_075598.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FGFR1	ENST00000447712.7	c.1636A>G	p.Asn546Asp	missense_variant	12/18	1	NM_023110.3	ENSP00000400162.2
FGFR1	ENST00000397091.9	c.1630A>G	p.Asn544Asp	missense_variant	12/18	1		ENSP00000380280.5
FGFR1	ENST00000397108.8	c.1630A>G	p.Asn544Asp	missense_variant	13/19	1		ENSP00000380297.4
FGFR1	ENST00000397113.6	c.1630A>G	p.Asn544Asp	missense_variant	12/18	2		ENSP00000380302.2
FGFR1	ENST00000356207.9	c.1369A>G	p.Asn457Asp	missense_variant	11/17	1		ENSP00000348537.5
FGFR1	ENST00000397103.5	c.1369A>G	p.Asn457Asp	missense_variant	10/16	5		ENSP00000380292.1
FGFR1	ENST00000326324.10	c.1363A>G	p.Asn455Asp	missense_variant	11/17	1		ENSP00000327229.6
FGFR1	ENST00000487647.5	n.*1327A>G		non_coding_transcript_exon_variant	11/12	1		ENSP00000435254.1
FGFR1	ENST00000487647.5	n.*1327A>G		3_prime_UTR_variant	11/12	1		ENSP00000435254.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:5

Revision: no assertion criteria provided

Submissions by phenotype

Neuroblastoma Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Gastric adenocarcinoma Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Medulloblastoma Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Astrocytoma Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Brainstem glioma Pathogenic:1

Likely pathogenic, no assertion criteria provided

literature only

Database of Curated Mutations (DoCM)

May 31, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.89
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.040
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.90	.;.;D;.;.;.;.;.;D;.
Eigen	Pathogenic	0.74
Eigen_PC	Pathogenic	0.75
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D;.;D;D;.;D;D;D;D;D
M_CAP	Pathogenic	0.44	D
MetaRNN	Pathogenic	0.98	D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.75	D
MutationAssessor	Benign	1.3	.;.;L;.;.;.;.;.;.;.
PrimateAI	Pathogenic	0.85	D
PROVEAN	Pathogenic	-4.5	D;D;D;D;D;D;D;D;D;D
REVEL	Pathogenic	0.84
Sift	Pathogenic	0.0	D;D;D;D;D;D;D;D;D;D
Sift4G	Uncertain	0.0050	D;D;D;D;D;D;D;D;D;D
Polyphen		1.0, 1.0	.;.;D;D;.;.;D;D;.;.
Vest4		0.95
MutPred		0.90		.;.;Loss of MoRF binding (P = 0.1092);.;.;.;.;.;.;.;
MVP		0.93
MPC		2.2
ClinPred		1.0	D
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7
Varity_R		0.99
gMVP		0.79

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: rs1057519898; hg19: chr8-38274851; COSMIC: COSV58330676; COSMIC: COSV58330676;