Genetic Variant FAM133B:p.Arg138His (chr7-92577155-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_152789.4(FAM133B):c.413G>A(p.Arg138His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000227 in 1,495,676 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000024 ( 0 hom. )

Consequence

FAM133B
NM_152789.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.28

Variant links:

Genes affected

FAM133B (HGNC:28629): (family with sequence similarity 133 member B) Enables RNA binding activity. [provided by Alliance of Genome Resources, Apr 2022]

FAM133B 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=0.09490761).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FAM133B	NM_152789.4 link	c.413G>A	p.Arg138His	missense_variant	Exon 7 of 11	ENST00000445716.6	NP_690002.2	Q5BKY9-1
FAM133B	NM_001040057.3 link	c.383G>A	p.Arg128His	missense_variant	Exon 8 of 12		NP_001035146.1	Q5BKY9-2
FAM133B	NM_001288584.2 link	c.383G>A	p.Arg128His	missense_variant	Exon 7 of 11		NP_001275513.1	Q5BKY9-2
FAM133B	NR_109929.2 link	n.471G>A		non_coding_transcript_exon_variant	Exon 7 of 11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FAM133B	ENST00000445716.6 link	c.413G>A	p.Arg138His	missense_variant	Exon 7 of 11	1	NM_152789.4	ENSP00000398401.1		Q5BKY9-1

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

151994

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000762

AC:

AN:

131206

Hom.:

AF XY:

0.00

AC XY:

AN XY:

69730

show subpopulations

Gnomad AFR exome

AF:

0.00

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:

0.0000191

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000238

AC:

AN:

1343682

Hom.:

Cov.:

AF XY:

0.0000197

AC XY:

AN XY:

661020

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000298

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000266

Gnomad4 OTH exome

AF:

0.0000362

GnomAD4 genome

AF:

0.0000132

AC:

AN:

151994

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74248

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000612

Hom.:

Bravo

AF:

0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 03, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.413G>A (p.R138H) alteration is located in exon 7 (coding exon 7) of the FAM133B gene. This alteration results from a G to A substitution at nucleotide position 413, causing the arginine (R) at amino acid position 138 to be replaced by a histidine (H). 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

0.070

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.51

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.013

.;T;.;T

Eigen

Benign

-0.26

Eigen_PC

Benign

-0.094

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.43

.;T;T;T

M_CAP

Benign

0.0060

MetaRNN

Benign

0.095

T;T;T;T

MetaSVM

Benign

-0.99

MutationAssessor

Benign

1.2

.;L;.;.

PrimateAI

Benign

0.30

PROVEAN

Benign

-0.030

N;N;N;N

REVEL

Benign

0.047

Sift

Benign

0.46

T;T;T;.

Sift4G

Benign

0.14

T;T;T;T

Polyphen

0.0010

.;B;.;.

Vest4

0.14

MVP

0.24

MPC

0.29

ClinPred

0.45

GERP RS

3.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.051

gMVP

0.016

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