chr10-121517414-C-A

Position:

• chr10-121517414-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 5P and 1B. PM1 PM2 PP2 BP4

The ENST00000358487.10(FGFR2):​c.989G>T​(p.Arg330Leu) 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. 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. R330Q) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FGFR2 ENST00000358487.10 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.31

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 4 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 5 uncertain in ENST00000358487.10
• 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=0.40246058).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FGFR2	NM_000141.5	c.989G>T	p.Arg330Leu	missense_variant	8/18	ENST00000358487.10	NP_000132.3
FGFR2	NM_022970.4	c.1087+1268G>T		intron_variant		ENST00000457416.7	NP_075259.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FGFR2	ENST00000358487.10	c.989G>T	p.Arg330Leu	missense_variant	8/18	1	NM_000141.5	ENSP00000351276	A2
FGFR2	ENST00000457416.7	c.1087+1268G>T		intron_variant		1	NM_022970.4	ENSP00000410294	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.55
BayesDel_addAF	Uncertain	0.037	T
BayesDel_noAF	Benign	-0.19
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.76	.;.;D;.;.;.;T;.
Eigen	Benign	0.14
Eigen_PC	Uncertain	0.31
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.87	D;D;D;D;D;D;D;D
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.40	T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.57	T
MutationAssessor	Benign	0.57	.;.;N;.;.;N;.;.
MutationTaster	Benign	0.89	D;D;D;D;D;D;D;D;D;D;D
PROVEAN	Uncertain	-3.2	D;.;D;.;D;D;.;D
REVEL	Benign	0.22
Sift	Uncertain	0.012	D;.;D;.;D;D;.;D
Sift4G	Benign	0.10	T;T;T;T;T;T;T;.
Polyphen		0.48	P;.;.;.;B;.;.;.
Vest4		0.54
MutPred		0.55		.;.;Loss of sheet (P = 0.0817);.;.;Loss of sheet (P = 0.0817);.;.;
MVP		0.63
ClinPred		0.41	T
GERP RS		5.9
Varity_R		0.65

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: chr10-123276928;