Genetic Variant NM_003506.4:c.287G>T (chr8-103318699-G-T) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_003506.4(FZD6):c.287G>T(p.Arg96Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000687 in 1,456,056 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. R96H) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

FZD6
NM_003506.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.78

Publications

0 publications found

Variant links:

Genes affected

FZD6 (HGNC:4044): (frizzled class receptor 6) This gene represents a member of the 'frizzled' gene family, which encode 7-transmembrane domain proteins that are receptors for Wnt signaling proteins. The protein encoded by this family member contains a signal peptide, a cysteine-rich domain in the N-terminal extracellular region, and seven transmembrane domains, but unlike other family members, this protein does not contain a C-terminal PDZ domain-binding motif. This protein functions as a negative regulator of the canonical Wnt/beta-catenin signaling cascade, thereby inhibiting the processes that trigger oncogenic transformation, cell proliferation, and inhibition of apoptosis. Alternative splicing results in multiple transcript variants, some of which do not encode a protein with a predicted signal peptide.[provided by RefSeq, Aug 2011]

FZD6 links:

BAALC-AS1 (HGNC:50461): (BAALC antisense RNA 1)

BAALC-AS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.984

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003506.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
FZD6	NM_003506.4	MANE Select	c.287G>T	p.Arg96Leu	missense	Exon 3 of 7	NP_003497.2
FZD6	NM_001164615.2		c.287G>T	p.Arg96Leu	missense	Exon 3 of 7	NP_001158087.1	O60353-1
FZD6	NM_001164616.2		c.191G>T	p.Arg64Leu	missense	Exon 4 of 8	NP_001158088.1	O60353-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
FZD6	ENST00000358755.5	TSL:1 MANE Select	c.287G>T	p.Arg96Leu	missense	Exon 3 of 7	ENSP00000351605.4	O60353-1
FZD6	ENST00000522566.5	TSL:1	c.287G>T	p.Arg96Leu	missense	Exon 3 of 7	ENSP00000429055.1	O60353-1
FZD6	ENST00000522484.5	TSL:1	n.287G>T		non_coding_transcript_exon	Exon 3 of 6	ENSP00000428301.1	G5EA13

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.87e-7

AC:

AN:

1456056

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

724888

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33376

American (AMR)

AF:

0.00

AC:

AN:

44672

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26084

East Asian (EAS)

AF:

0.00

AC:

AN:

39660

South Asian (SAS)

AF:

0.00

AC:

AN:

86158

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53402

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5760

European-Non Finnish (NFE)

AF:

9.04e-7

AC:

AN:

1106720

Other (OTH)

AF:

0.00

AC:

AN:

60224

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.56

BayesDel_addAF

Pathogenic

0.47

BayesDel_noAF

Pathogenic

0.43

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.74

Eigen

Pathogenic

0.99

Eigen_PC

Pathogenic

0.94

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.93

M_CAP

Pathogenic

0.30

MetaRNN

Pathogenic

0.98

MetaSVM

Uncertain

0.78

MutationAssessor

Pathogenic

4.2

PhyloP100

7.8

PrimateAI

Uncertain

0.51

PROVEAN

Pathogenic

-6.2

REVEL

Pathogenic

0.94

Sift

Pathogenic

0.0

Sift4G

Uncertain

0.0020

Polyphen

1.0

Vest4

0.91

MutPred

0.86

Gain of catalytic residue at R96 (P = 0.0295)

MVP

1.0

MPC

1.0

ClinPred

1.0

GERP RS

5.8

Varity_R

0.95

gMVP

0.93

Mutation Taster

=48/52

disease causing

(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

Computational scores

Splicing

Publications

Other links and lift over