10-121520050-A-T

Variant summary

Our verdict is Pathogenic. Variant got 21 ACMG points: 21P and 0B. PS1_Very_Strong PM1 PM2 PM5 PP2 PP3_Strong PP5_Moderate

The NM_000141.5(FGFR2):c.868T>A(p.Trp290Arg) 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. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Another nucleotide change resulting in same amino acid change has been previously reported as Pathogenicin ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. W290C) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: FGFR2 NM_000141.5 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.32

Genes affected

FGFR2 (HGNC:3689): (fibroblast growth factor receptor 2) The protein encoded by this gene is a member of the fibroblast growth factor receptor 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 is a high-affinity receptor for acidic, basic and/or keratinocyte growth factor, depending on the isoform. Mutations in this gene are associated with Crouzon syndrome, Pfeiffer syndrome, Craniosynostosis, Apert syndrome, Jackson-Weiss syndrome, Beare-Stevenson cutis gyrata syndrome, Saethre-Chotzen syndrome, and syndromic craniosynostosis. Multiple alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Jan 2009]

ACMG classification

Verdict is Pathogenic. Variant got 21 ACMG points.

• PS1: Transcript NM_000141.5 (FGFR2) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar as 13283
• PM1: In a strand (size 6) in uniprot entity FGFR2_HUMAN there are 21 pathogenic changes around while only 0 benign (100%) in NM_000141.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr10-121520048-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 13281.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP2: Missense variant where missense usually causes diseases, FGFR2
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.995
• PP5: Variant 10-121520050-A-T is Pathogenic according to our data. Variant chr10-121520050-A-T is described in ClinVar as [Pathogenic]. Clinvar id is 1995111.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGFR2	NM_022970.4	c.868T>A	p.Trp290Arg	missense_variant	7/18	ENST00000457416.7
FGFR2	NM_000141.5	c.868T>A	p.Trp290Arg	missense_variant	7/18	ENST00000358487.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FGFR2	ENST00000457416.7	c.868T>A	p.Trp290Arg	missense_variant	7/18	1	NM_022970.4	P4
FGFR2	ENST00000358487.10	c.868T>A	p.Trp290Arg	missense_variant	7/18	1	NM_000141.5	A2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

FGFR2-related craniosynostosis Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

May 16, 2022

For these reasons, this variant has been classified as Pathogenic. This variant disrupts the p.Trp290 amino acid residue in FGFR2. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 9475591, 18618990, 24036790, 27683237). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Experimental studies have shown that this missense change affects FGFR2 function (PMID: 20503384). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. This missense change has been observed in individuals with clinical features of Crouzon syndrome (PMID: 7655462, 16418739, 23431754, 24127277, 24656465; Invitae). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces tryptophan, which is neutral and slightly polar, with arginine, which is basic and polar, at codon 290 of the FGFR2 protein (p.Trp290Arg). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.59	D
BayesDel_noAF	Pathogenic	0.60
Cadd	Pathogenic	33
Dann	Uncertain	1.0
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.99
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D;D;D;D;D;D;D;D;D;D;D;D;D;D
M_CAP	Pathogenic	0.78	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	0.89	D
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D;D;D;D
PrimateAI	Pathogenic	0.92	D
PROVEAN	Pathogenic	-12	D;.;D;.;D;D;D;D;D;D;D;D;D;D
REVEL	Pathogenic	0.97
Sift	Uncertain	0.0010	D;.;D;.;D;T;D;D;D;D;D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D;D;D;D;D;D;D;D;D;D;.
Polyphen		1.0	D;.;.;.;D;.;.;.;.;.;D;D;.;.
Vest4		0.98
MutPred		0.97		.;.;Gain of disorder (P = 0.0086);.;.;Gain of disorder (P = 0.0086);.;Gain of disorder (P = 0.0086);Gain of disorder (P = 0.0086);Gain of disorder (P = 0.0086);.;Gain of disorder (P = 0.0086);Gain of disorder (P = 0.0086);.;
MVP		0.96
MPC		2.0
ClinPred		1.0	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.98
gMVP		0.99

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr10-123279564;