8-38413783-G-C

Position:

• chr8-38413783-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The ENST00000447712.7(FGFR1):​c.2314C>G​(p.Pro772Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign 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. P772S) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FGFR1 ENST00000447712.7 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.90

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 Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• 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.
• BP4: Computational evidence support a benign effect (MetaRNN=0.2911824).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FGFR1	NM_023110.3	c.2314C>G	p.Pro772Ala	missense_variant	18/18	ENST00000447712.7	NP_075598.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FGFR1	ENST00000447712.7	c.2314C>G	p.Pro772Ala	missense_variant	18/18	1	NM_023110.3	ENSP00000400162	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.096
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.070
CADD	Uncertain	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.88	.;.;D;.;.;.;.;.;T;.
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.92	D;.;D;D;.;D;D;D;D;D
M_CAP	Uncertain	0.16	D
MetaRNN	Benign	0.29	T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	0.38	D
MutationAssessor	Uncertain	2.8	.;.;M;.;.;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D;D;D;D
PrimateAI	Uncertain	0.63	T
PROVEAN	Pathogenic	-4.5	D;D;D;D;D;D;D;D;D;D
REVEL	Uncertain	0.57
Sift	Uncertain	0.019	D;D;D;D;D;D;D;D;D;D
Sift4G	Benign	0.13	T;T;T;T;T;T;T;T;T;T
Polyphen		0.96, 0.98, 0.88	.;.;D;D;.;.;P;P;.;.
Vest4		0.16
MutPred		0.28		.;.;Loss of disorder (P = 0.07);.;.;.;.;.;.;.;
MVP		0.74
MPC		1.7
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.53
gMVP		0.44

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: rs56234888; hg19: chr8-38271301;