chr10-121520016-T-C

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP2PP3

The NM_022970.4(FGFR2):c.902A>G(p.Tyr301Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. Y301Y) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Consequence

FGFR2
NM_022970.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.68

Publications

0 publications found

Variant links:

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]

FGFR2 Gene-Disease associations (from GenCC):

Apert syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, PanelApp Australia, G2P, Genomics England PanelApp
Beare-Stevenson cutis gyrata syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, G2P, Genomics England PanelApp
Crouzon syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, ClinGen, PanelApp Australia, Genomics England PanelApp, G2P
Jackson-Weiss syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp, G2P
LADD syndrome 1
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
Pfeiffer syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, PanelApp Australia, Labcorp Genetics (formerly Invitae), Ambry Genetics, Genomics England PanelApp, G2P
Antley-Bixler syndrome without genital anomalies or disordered steroidogenesis
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp, G2P
bent bone dysplasia syndrome 1
Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet
familial scaphocephaly syndrome, McGillivray type
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp
Saethre-Chotzen syndrome
Inheritance: AD Classification: STRONG Submitted by: PanelApp Australia, Genomics England PanelApp
Antley-Bixler syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
LADD syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Pfeiffer syndrome type 1
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Pfeiffer syndrome type 2
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Pfeiffer syndrome type 3
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

FGFR2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the FGFR2 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 114 curated pathogenic missense variants (we use a threshold of 10). The gene has 24 curated benign missense variants. Gene score misZ: 2.402 (below the threshold of 3.09). Trascript score misZ: 4.3638 (above the threshold of 3.09). GenCC associations: The gene is linked to Pfeiffer syndrome type 3, Crouzon syndrome, Apert syndrome, Antley-Bixler syndrome, Beare-Stevenson cutis gyrata syndrome, Jackson-Weiss syndrome, bent bone dysplasia syndrome 1, Pfeiffer syndrome, Saethre-Chotzen syndrome, LADD syndrome 1, familial scaphocephaly syndrome, McGillivray type, LADD syndrome, Pfeiffer syndrome type 1, Pfeiffer syndrome type 2, Antley-Bixler syndrome without genital anomalies or disordered steroidogenesis.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.784

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_022970.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
FGFR2	NM_022970.4	MANE Plus Clinical	c.902A>G	p.Tyr301Cys	missense	Exon 7 of 18	NP_075259.4
FGFR2	NM_000141.5	MANE Select	c.902A>G	p.Tyr301Cys	missense	Exon 7 of 18	NP_000132.3
FGFR2	NM_001441087.1		c.902A>G	p.Tyr301Cys	missense	Exon 7 of 18	NP_001428016.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
FGFR2	ENST00000457416.7	TSL:1 MANE Plus Clinical	c.902A>G	p.Tyr301Cys	missense	Exon 7 of 18	ENSP00000410294.2
FGFR2	ENST00000358487.10	TSL:1 MANE Select	c.902A>G	p.Tyr301Cys	missense	Exon 7 of 18	ENSP00000351276.6
FGFR2	ENST00000369056.5	TSL:1	c.902A>G	p.Tyr301Cys	missense	Exon 6 of 17	ENSP00000358052.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

FGFR2-related craniosynostosis

Uncertain:1

Jul 03, 2016

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In summary, this variant is a rare missense change with uncertain impact on protein function. While it is absent from the population and reported in affected individuals, the available evidence is currently insufficient to definitively determine its role in disease. Therefore, it has been classified as a Variant of Uncertain Significance. This sequence change replaces tyrosine with cysteine at codon 301 of the FGFR2 protein (p.Tyr301Cys). The tyrosine residue is moderately conserved and there is a large physicochemical difference between tyrosine and cysteine. This variant is not present in population databases (ExAC no frequency). This variant has been reported in 2 individuals affected with Crouzon Syndrome (PMID: 9521581, 18391498). Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0").

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.33

BayesDel_addAF

Pathogenic

0.40

BayesDel_noAF

Pathogenic

0.34

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.88

Eigen

Benign

0.067

Eigen_PC

Benign

0.21

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.91

M_CAP

Uncertain

0.20

MetaRNN

Pathogenic

0.78

MetaSVM

Uncertain

0.62

MutationAssessor

Benign

1.2

PhyloP100

2.7

PrimateAI

Pathogenic

0.81

PROVEAN

Pathogenic

-4.6

REVEL

Pathogenic

0.72

Sift

Uncertain

0.023

Sift4G

Benign

0.11

Polyphen

0.0070

Vest4

0.80

MutPred

0.74

Gain of methylation at K300 (P = 0.0183)

MVP

0.98

MPC

1.6

ClinPred

0.91

GERP RS

5.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.36

gMVP

0.90

Mutation Taster

=2/98

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over