rs121909656

Variant names:

• chr5-180614083-C-T
• rs121909656
• NM_182925.5:c.3316G>A

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 9P and 0B. PM1 PM2 PP3_Strong PP5

The NM_182925.5(FLT4):​c.3316G>A​(p.Glu1106Lys) 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 Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 34)
• Consequence: FLT4 NM_182925.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.89
• Publications: 5 publications found

Genes affected

FLT4 (HGNC:3767): (fms related receptor tyrosine kinase 4) This gene encodes a tyrosine kinase receptor for vascular endothelial growth factors C and D. The protein is thought to be involved in lymphangiogenesis and maintenance of the lymphatic endothelium. Mutations in this gene cause hereditary lymphedema type IA. [provided by RefSeq, Jul 2008]

FLT4 Gene-Disease associations (from GenCC):

• congenital heart defects, multiple types, 7

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae)
• lymphatic malformation 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• capillary infantile hemangioma

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• lymphatic malformation

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• tetralogy of fallot

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 9 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 1 uncertain in NM_182925.5
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.992
• PP5: Variant 5-180614083-C-T is Pathogenic according to our data. Variant chr5-180614083-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 16267.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_182925.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FLT4	NM_182925.5	MANE Select	c.3316G>A	p.Glu1106Lys	missense	Exon 24 of 30	NP_891555.2	P35916-2
	FLT4	NM_001354989.2		c.3316G>A	p.Glu1106Lys	missense	Exon 24 of 30	NP_001341918.1	E9PD35
	FLT4	NM_002020.5		c.3316G>A	p.Glu1106Lys	missense	Exon 24 of 30	NP_002011.2	P35916-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FLT4	ENST00000261937.11	TSL:1 MANE Select	c.3316G>A	p.Glu1106Lys	missense	Exon 24 of 30	ENSP00000261937.6	P35916-2
	FLT4	ENST00000502649.5	TSL:1	c.3316G>A	p.Glu1106Lys	missense	Exon 24 of 30	ENSP00000426057.1	E9PD35
	FLT4	ENST00000393347.7	TSL:1	c.3316G>A	p.Glu1106Lys	missense	Exon 24 of 30	ENSP00000377016.3	P35916-1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 34

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Hereditary lymphedema type I (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Pathogenic	0.49
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.89	D
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.80	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.2	M
PhyloP100		7.9
PrimateAI	Pathogenic	0.90	D
PROVEAN	Uncertain	-3.4	D
REVEL	Pathogenic	0.90
Sift	Uncertain	0.017	D
Sift4G	Uncertain	0.027	D
Polyphen		0.66	P
Vest4		0.97
MutPred		0.95		Gain of methylation at E1106 (P = 0.0058)
MVP		0.96
MPC		1.2
ClinPred		0.98	D
GERP RS		2.9
Varity_R		0.83
gMVP		1.0
Mutation Taster		=4/96	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs121909656; hg19: chr5-180041083; COSMIC: COSV105855204;