4-1807260-T-G

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PM2PM4PP5_Very_Strong

The NM_000142.5(FGFR3):c.2419T>G(p.Ter807Glyext*?) variant causes a stop lost 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. Variant has been reported in ClinVar as Pathogenic (★★).

Frequency

Genomes: not found (cov: 33)

Consequence

FGFR3
NM_000142.5 stop_lost

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:5O:1

Conservation

PhyloP100: 2.71

Publications

16 publications found

Variant links:

COSMIC-nc: COSV107293820

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 Gene-Disease associations (from GenCC):

achondroplasia
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, ClinGen, Genomics England PanelApp, Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
Crouzon syndrome-acanthosis nigricans syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Ambry Genetics, Orphanet, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), PanelApp Australia, ClinGen
hypochondroplasia
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, G2P, ClinGen, Labcorp Genetics (formerly Invitae), Orphanet
lacrimoauriculodentodigital syndrome 2
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
Muenke syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, PanelApp Australia, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, ClinGen, G2P
thanatophoric dysplasia type 1
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Ambry Genetics, Genomics England PanelApp, Orphanet, ClinGen
thanatophoric dysplasia type 2
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae)
camptodactyly-tall stature-scoliosis-hearing loss syndrome
Inheritance: AR, AD, SD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, G2P, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen
severe achondroplasia-developmental delay-acanthosis nigricans syndrome
Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), ClinGen
isolated brachycephaly
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
isolated plagiocephaly
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
LADD syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
LADD syndrome 1
Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

FGFR3 links:

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ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 12 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM4

Stoplost variant in NM_000142.5 Downstream stopcodon found after 897 codons.

PP5

Variant 4-1807260-T-G is Pathogenic according to our data. Variant chr4-1807260-T-G is described in ClinVar as Pathogenic. ClinVar VariationId is 16334.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000142.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
FGFR3	NM_000142.5	MANE Select	c.2419T>G	p.Ter807Glyext*?	stop_lost	Exon 18 of 18	NP_000133.1
FGFR3	NM_001163213.2		c.2425T>G	p.Ter809Glyext*?	stop_lost	Exon 18 of 18	NP_001156685.1
FGFR3	NM_001354809.2		c.2422T>G	p.Ter808Glyext*?	stop_lost	Exon 18 of 18	NP_001341738.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
FGFR3	ENST00000440486.8	TSL:5 MANE Select	c.2419T>G	p.Ter807Glyext*?	stop_lost	Exon 18 of 18	ENSP00000414914.2
FGFR3	ENST00000352904.6	TSL:1	c.2083T>G	p.Ter695Glyext*?	stop_lost	Exon 15 of 15	ENSP00000231803.1
FGFR3	ENST00000481110.7	TSL:1	c.2351T>G	p.Val784Gly	missense	Exon 17 of 17	ENSP00000420533.2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:5Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Thanatophoric dysplasia type 1

Pathogenic:2Other:1

Nov 18, 2018

Baylor Genetics

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

GeneReviews

Significance:not provided

Review Status:no classification provided

Collection Method:literature only

May 01, 1995

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

not provided

Pathogenic:2

Apr 01, 2018

CeGaT Center for Human Genetics Tuebingen

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Dec 12, 2023

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Identified in multiple other patients with thantophoric dysplsasia in the published literature (PMID: 25614871, 28254233); Variant resulting in loss of the termination codon leading to protein extension by 101 amino acids; Several different variants resulting in similar protein extensions have been reported in the Human Gene Mutation Database associated with thanatophoric dysplasia (HGMD), and have apparently similar functional consequences on protein stability and/or processing (PMID: 17509076, 17320202); Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 22045636, 28254233, 9677066, 28249712, 19449430, 22414243, 10360402, 19066716, 24295726, 30048571, 25728633, 30692697, 34958143, 34358384, 20301540, 17509076, 17320202, 7647778, 25614871)

See cases

Pathogenic:1

Mar 03, 2022

Institute Of Reproduction And Development, Obstetrics and Gynecology Hospital, Fudan University

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:research

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Pathogenic

0.21

BayesDel_noAF

Uncertain

0.070

CADD

Benign

(source)

DANN

Benign

0.76

DEOGEN2

Benign

0.28

Eigen

Pathogenic

0.82

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.15

MetaRNN

Benign

0.26

MetaSVM

Benign

-1.0

PhyloP100

2.7

PROVEAN

Benign

-1.0

REVEL

Uncertain

0.31

Sift

Pathogenic

0.0

Polyphen

0.13

Vest4

0.21

MutPred

0.63

Loss of stability (P = 0.0047)

MVP

0.84

ClinPred

0.96

GERP RS

3.4

Mutation Taster

=0/200

disease causing (ClinVar)

(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