dbSNP rs587778359: FGFR3:p.Lys496Gln (chr4-1805428-A-C) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1PM2

The NM_000142.5(FGFR3):c.1486A>C(p.Lys496Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,814 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

FGFR3
NM_000142.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 9.08

Variant links:

Genes affected

FGFR3 (HGNC:3690): (fibroblast growth factor receptor 3) This gene encodes a member of the fibroblast growth factor receptor (FGFR) family, with its amino acid sequence being highly conserved between members and among divergent species. FGFR family members differ from one another in their ligand affinities and tissue distribution. A full-length representative protein would consist 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 binds acidic and basic fibroblast growth hormone and plays a role in bone development and maintenance. Mutations in this gene lead to craniosynostosis and multiple types of skeletal dysplasia. [provided by RefSeq, Aug 2017]

FGFR3 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM1

In a domain Protein kinase (size 289) in uniprot entity FGFR3_HUMAN there are 14 pathogenic changes around while only 5 benign (74%) in NM_000142.5

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FGFR3	NM_000142.5 link	c.1486A>C	p.Lys496Gln	missense_variant	Exon 11 of 18	ENST00000440486.8	NP_000133.1	P22607-1Q0IJ44

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FGFR3	ENST00000440486.8 link	c.1486A>C	p.Lys496Gln	missense_variant	Exon 11 of 18	5	NM_000142.5	ENSP00000414914.2		P22607-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459814

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726114

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.00e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Pathogenic

0.24

BayesDel_noAF

Uncertain

0.10

CADD

Pathogenic

DANN

Uncertain

0.98

DEOGEN2

Pathogenic

0.84

D;D;.;.;.

Eigen

Benign

0.17

Eigen_PC

Uncertain

0.23

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.87

D;D;D;D;.

M_CAP

Pathogenic

0.69

MetaRNN

Uncertain

0.64

D;D;D;D;D

MetaSVM

Uncertain

0.56

MutationAssessor

Benign

1.1

L;.;.;.;.

PrimateAI

Uncertain

0.64

PROVEAN

Uncertain

-2.9

D;D;D;D;D

REVEL

Pathogenic

0.72

Sift

Uncertain

0.012

D;D;D;D;D

Sift4G

Uncertain

0.054

T;D;T;T;T

Polyphen

0.084

B;B;P;D;D

Vest4

0.60

MutPred

0.49

Loss of sheet (P = 0.007);.;.;.;.;

MVP

0.94

MPC

0.41

ClinPred

0.98

GERP RS

3.8

Varity_R

0.87

gMVP

0.64

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over