Genetic Variant FLT4:c.3002-18C>A (chr5-180617012-G-T) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_182925.5(FLT4):c.3002-18C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00136 in 1,603,184 control chromosomes in the GnomAD database, including 27 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0059 ( 12 hom., cov: 32)

Exomes 𝑓: 0.00088 ( 15 hom. )

Consequence

FLT4
NM_182925.5 intron

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 0.0540

Publications

2 publications found

Variant links:

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):

lymphatic malformation 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
capillary infantile hemangioma
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
congenital heart defects, multiple types, 7
Inheritance: AD Classification: STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
lymphatic malformation
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
tetralogy of fallot
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

FLT4 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.76).

BP6

Variant 5-180617012-G-T is Benign according to our data. Variant chr5-180617012-G-T is described in ClinVar as Benign. ClinVar VariationId is 263042.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00591 (900/152236) while in subpopulation AFR AF = 0.0191 (793/41510). AF 95% confidence interval is 0.018. There are 12 homozygotes in GnomAd4. There are 436 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 900 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FLT4	NM_182925.5 link	c.3002-18C>A		intron_variant	Intron 21 of 29	ENST00000261937.11	NP_891555.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FLT4	ENST00000261937.11 link	c.3002-18C>A		intron_variant	Intron 21 of 29	1	NM_182925.5	ENSP00000261937.6

Frequencies

GnomAD3 genomes

AF:

0.00586

AC:

891

AN:

152120

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0190

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00367

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00331

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0127

Gnomad NFE

AF:

0.000250

Gnomad OTH

AF:

0.00621

GnomAD2 exomes

AF:

0.00203

AC:

508

AN:

249950

AF XY:

0.00177

show subpopulations

Gnomad AFR exome

AF:

0.0210

Gnomad AMR exome

AF:

0.00191

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000319

Gnomad OTH exome

AF:

0.00180

GnomAD4 exome

AF:

0.000879

AC:

1275

AN:

1450948

Hom.:

Cov.:

AF XY:

0.000864

AC XY:

624

AN XY:

722538

show subpopulations

African (AFR)

AF:

0.0195

AC:

647

AN:

33220

American (AMR)

AF:

0.00181

AC:

AN:

44688

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26080

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39652

South Asian (SAS)

AF:

0.00181

AC:

156

AN:

86038

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52186

Middle Eastern (MID)

AF:

0.00767

AC:

AN:

5734

European-Non Finnish (NFE)

AF:

0.000200

AC:

221

AN:

1103298

Other (OTH)

AF:

0.00206

AC:

124

AN:

60052

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

Heterozygous variant carriers

134

202

269

336

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

112

140

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00591

AC:

900

AN:

152236

Hom.:

Cov.:

AF XY:

0.00586

AC XY:

436

AN XY:

74426

show subpopulations

African (AFR)

AF:

0.0191

AC:

793

AN:

41510

American (AMR)

AF:

0.00366

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00331

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.0170

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000250

AC:

AN:

68004

Other (OTH)

AF:

0.00615

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

122

163

204

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000499

Hom.:

Bravo

AF:

0.00716

Asia WGS

AF:

0.00809

AC:

AN:

3476

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:1

Sep 21, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.76

CADD

Benign

1.6

(source)

DANN

Benign

0.62

PhyloP100

0.054

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over