Genetic Variant FAM43B:p.Ile98Met (chr1-20553267-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_207334.3(FAM43B):c.294C>G(p.Ile98Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000745 in 1,611,258 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: 𝑓 0.000059 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

FAM43B
NM_207334.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.17

Variant links:

Genes affected

FAM43B (HGNC:31791): (family with sequence similarity 43 member B)

FAM43B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FAM43B	NM_207334.3 link	c.294C>G	p.Ile98Met	missense_variant	Exon 1 of 1	ENST00000332947.6	NP_997217.1	Q6ZT52

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FAM43B	ENST00000332947.6 link	c.294C>G	p.Ile98Met	missense_variant	Exon 1 of 1	6	NM_207334.3	ENSP00000331397.4		Q6ZT52

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152234

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000422

AC:

AN:

237000

Hom.:

AF XY:

0.00

AC XY:

AN XY:

129580

show subpopulations

Gnomad AFR exome

AF:

0.0000675

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000206

AC:

AN:

1458906

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

725672

show subpopulations

Gnomad4 AFR exome

AF:

0.0000897

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152352

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74502

show subpopulations

Gnomad4 AFR

AF:

0.000168

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000142

Hom.:

Bravo

AF:

0.0000529

ExAC

AF:

0.00000827

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 03, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.294C>G (p.I98M) alteration is located in exon 1 (coding exon 1) of the FAM43B gene. This alteration results from a C to G substitution at nucleotide position 294, causing the isoleucine (I) at amino acid position 98 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.86

BayesDel_addAF

Uncertain

0.16

BayesDel_noAF

Uncertain

-0.010

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.087

Eigen

Uncertain

0.32

Eigen_PC

Benign

0.21

FATHMM_MKL

Uncertain

0.88

LIST_S2

Benign

0.79

M_CAP

Pathogenic

0.39

MetaRNN

Uncertain

0.49

MetaSVM

Benign

-0.35

MutationAssessor

Uncertain

2.9

PrimateAI

Pathogenic

0.89

PROVEAN

Benign

-1.8

REVEL

Uncertain

0.38

Sift

Uncertain

0.0020

Sift4G

Uncertain

0.0060

Polyphen

1.0

Vest4

0.76

MutPred

0.68

Loss of helix (P = 0.0237);

MVP

0.15

ClinPred

0.76

GERP RS

2.7

Varity_R

0.57

gMVP

0.76

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over