rs1554930684

Positions:

• chr10-121520016-T-A
• chr10-121520016-T-C
• chr10-121520016-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 5P and 2B. PM1 PM2 PP2 BP4_Moderate

The NM_000141.5(FGFR2):​c.902A>T​(p.Tyr301Phe) 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 benign outcome for this variant. 12/21 in silico tools predict 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. Y301C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: FGFR2 NM_000141.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.68

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 Uncertain_significance. Variant got 3 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 5 uncertain in NM_000141.5
• PM2: Very rare variant in population databases, with high coverage
• 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.
• BP4: Computational evidence support a benign effect (MetaRNN=0.23166624).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FGFR2	NM_022970.4	c.902A>T	p.Tyr301Phe	missense_variant	7/18	ENST00000457416.7
FGFR2	NM_000141.5	c.902A>T	p.Tyr301Phe	missense_variant	7/18	ENST00000358487.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FGFR2	ENST00000457416.7	c.902A>T	p.Tyr301Phe	missense_variant	7/18	1	NM_022970.4	P4
FGFR2	ENST00000358487.10	c.902A>T	p.Tyr301Phe	missense_variant	7/18	1	NM_000141.5	A2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.079
BayesDel_addAF	Uncertain	0.075	D
BayesDel_noAF	Benign	-0.13
CADD	Benign	22
DANN	Benign	0.90
DEOGEN2	Benign	0.42	.;.;T;.;.;.;T;.;T;.;.;.;.;.
Eigen	Benign	-0.25
Eigen_PC	Benign	-0.033
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.88	D;D;D;D;D;D;D;D;D;D;D;D;D;D
M_CAP	Uncertain	0.092	D
MetaRNN	Benign	0.23	T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	0.073	D
MutationAssessor	Benign	0.090	.;.;N;.;.;N;.;N;.;N;.;N;N;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D;D;D;N
PrimateAI	Uncertain	0.74	T
PROVEAN	Benign	-1.5	N;.;N;.;N;N;N;N;N;N;N;N;N;N
REVEL	Uncertain	0.39
Sift	Benign	0.68	T;.;T;.;T;T;T;T;T;T;T;T;T;T
Sift4G	Benign	0.78	T;T;T;T;T;T;T;T;T;T;T;T;T;.
Polyphen		0.0	B;.;.;.;B;.;.;.;.;.;B;B;.;.
Vest4		0.35
MutPred		0.54		.;.;Gain of methylation at K300 (P = 0.027);.;.;Gain of methylation at K300 (P = 0.027);.;Gain of methylation at K300 (P = 0.027);Gain of methylation at K300 (P = 0.027);Gain of methylation at K300 (P = 0.027);.;Gain of methylation at K300 (P = 0.027);Gain of methylation at K300 (P = 0.027);.;
MVP		0.66
MPC		0.76
ClinPred		0.36	T
GERP RS		5.8
Varity_R		0.20
gMVP		0.67

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: chr10-123279530;