Genetic Variant FAM118A:p.Arg126Trp (chr22-45327917-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_017911.4(FAM118A):c.376C>T(p.Arg126Trp) variant causes a missense change. The variant allele was found at a frequency of 0.000383 in 1,614,200 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00020 ( 0 hom., cov: 35)

Exomes 𝑓: 0.00040 ( 1 hom. )

Consequence

FAM118A
NM_017911.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.75

Variant links:

Genes affected

FAM118A (HGNC:1313): (family with sequence similarity 118 member A) Enables identical protein binding activity. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

FAM118A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.09029937).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FAM118A	NM_017911.4 link	c.376C>T	p.Arg126Trp	missense_variant	Exon 4 of 9	ENST00000441876.7	NP_060381.2	Q9NWS6-1A0A024R4V3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FAM118A	ENST00000441876.7 link	c.376C>T	p.Arg126Trp	missense_variant	Exon 4 of 9	1	NM_017911.4	ENSP00000395892.2		Q9NWS6-1

Frequencies

GnomAD3 genomes

AF:

0.000204

AC:

AN:

152240

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000367

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000159

AC:

AN:

251370

Hom.:

AF XY:

0.000132

AC XY:

AN XY:

135856

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.000202

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000229

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000402

AC:

587

AN:

1461842

Hom.:

Cov.:

AF XY:

0.000360

AC XY:

262

AN XY:

727220

show subpopulations

Gnomad4 AFR exome

AF:

0.000179

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000493

Gnomad4 OTH exome

AF:

0.000331

GnomAD4 genome

AF:

0.000203

AC:

AN:

152358

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

74502

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000367

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000307

Hom.:

Bravo

AF:

0.000204

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000148

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000763

EpiControl

AF:

0.000415

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 08, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.376C>T (p.R126W) alteration is located in exon 5 (coding exon 3) of the FAM118A gene. This alteration results from a C to T substitution at nucleotide position 376, causing the arginine (R) at amino acid position 126 to be replaced by a tryptophan (W). 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

Benign

0.12

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.37

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.069

T;T;.;.

Eigen

Uncertain

0.21

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.91

.;D;D;D

M_CAP

Benign

0.020

MetaRNN

Benign

0.090

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

N;N;.;.

PrimateAI

Benign

0.34

PROVEAN

Benign

-2.1

N;N;D;D

REVEL

Benign

0.13

Sift

Uncertain

0.0020

D;D;D;D

Sift4G

Uncertain

0.0030

D;D;D;D

Polyphen

0.97

D;D;.;.

Vest4

0.24

MVP

0.10

MPC

0.36

ClinPred

0.081

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.11

gMVP

0.32

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

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