rs77543610

Positions:

• chr10-121520160-G-A
• chr10-121520160-G-C

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM2 PM5 PP2 PP3_Moderate PP5

The NM_000141.5(FGFR2):​c.758C>T​(p.Pro253Leu) 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. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P253R) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: FGFR2 NM_000141.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2 U:1
• Conservation: PhyloP100: 9.99

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 (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr10-121520160-G-C is described in Lovd as [Pathogenic].
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), FGFR2. . Gene score misZ 2.402 (greater than the threshold 3.09). Trascript score misZ 4.4365 (greater than threshold 3.09). GenCC has associacion of gene with Pfeiffer syndrome type 3, Antley-Bixler syndrome, Pfeiffer syndrome type 2, Saethre-Chotzen syndrome, Beare-Stevenson cutis gyrata syndrome, Crouzon syndrome, Jackson-Weiss syndrome, Pfeiffer syndrome type 1, LADD syndrome 1, Pfeiffer syndrome, bent bone dysplasia syndrome 1, Antley-Bixler syndrome without genital anomalies or disordered steroidogenesis, familial scaphocephaly syndrome, McGillivray type, Apert syndrome, LADD syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.888
• PP5: Variant 10-121520160-G-A is Pathogenic according to our data. Variant chr10-121520160-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 829801.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=1, Likely_pathogenic=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FGFR2	NM_000141.5	c.758C>T	p.Pro253Leu	missense_variant	7/18	ENST00000358487.10	NP_000132.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FGFR2	ENST00000358487.10	c.758C>T	p.Pro253Leu	missense_variant	7/18	1	NM_000141.5	ENSP00000351276.6
FGFR2	ENST00000457416.7	c.758C>T	p.Pro253Leu	missense_variant	7/18	1		ENSP00000410294.2
FGFR2	ENST00000369056.5	c.758C>T	p.Pro253Leu	missense_variant	6/17	1		ENSP00000358052.1
FGFR2	ENST00000369058.7	c.758C>T	p.Pro253Leu	missense_variant	7/17	1		ENSP00000358054.3
FGFR2	ENST00000613048.4	c.491C>T	p.Pro164Leu	missense_variant	6/17	5		ENSP00000484154.1
FGFR2	ENST00000369059.5	c.413C>T	p.Pro138Leu	missense_variant	5/16	5		ENSP00000358055.1
FGFR2	ENST00000360144.7	c.491C>T	p.Pro164Leu	missense_variant	6/17	2		ENSP00000353262.3
FGFR2	ENST00000478859.5	c.74C>T	p.Pro25Leu	missense_variant	6/17	1		ENSP00000474011.1
FGFR2	ENST00000369061.8	c.749-4841C>T		intron_variant		1		ENSP00000358057.4
FGFR2	ENST00000604236.5	n.413C>T		non_coding_transcript_exon_variant	5/17	1		ENSP00000474109.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2 Uncertain:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

FGFR2-related craniosynostosis Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 01, 2021

- -

Inborn genetic diseases Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 12, 2018

- -

Acrocephalosyndactyly type I Uncertain:1

Uncertain significance, criteria provided, single submitter

research

HudsonAlpha Institute for Biotechnology, HudsonAlpha Institute for Biotechnology

Nov 19, 2019

ACMG codes: PS4M, PM2, PP3 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.87
BayesDel_addAF	Pathogenic	0.29	D
BayesDel_noAF	Pathogenic	0.17
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.88	.;.;D;.;.;.;T;.;T;.;.;.;.;.
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.95	D;D;D;D;D;D;D;D;D;D;D;D;D;D
M_CAP	Uncertain	0.26	D
MetaRNN	Pathogenic	0.89	D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.39	D
MutationAssessor	Pathogenic	3.0	.;.;M;.;.;M;.;M;.;M;.;M;M;.
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-7.7	D;.;D;.;D;D;D;D;D;D;D;D;D;D
REVEL	Pathogenic	0.66
Sift	Pathogenic	0.0	D;.;D;.;D;D;D;D;D;D;D;D;D;D
Sift4G	Benign	0.086	T;T;D;D;T;D;T;D;D;D;T;D;D;.
Polyphen		0.39	B;.;.;.;B;.;.;.;.;.;B;P;.;.
Vest4		0.75
MutPred		0.69		.;.;Loss of disorder (P = 0.0317);.;.;Loss of disorder (P = 0.0317);.;Loss of disorder (P = 0.0317);Loss of disorder (P = 0.0317);Loss of disorder (P = 0.0317);.;Loss of disorder (P = 0.0317);Loss of disorder (P = 0.0317);.;
MVP		0.77
MPC		0.79
ClinPred		1.0	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.91
gMVP		0.90

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: rs77543610; hg19: chr10-123279674; COSMIC: COSV60648669; COSMIC: COSV60648669;