Genetic Variant FAM193B:p.Arg595Gln (chr5-177524697-C-T) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_001190946.3(FAM193B):c.1784G>A(p.Arg595Gln) variant causes a missense change. The variant allele was found at a frequency of 0.0000775 in 1,600,600 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000084 ( 0 hom. )

Consequence

FAM193B
NM_001190946.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.55

Variant links:

Genes affected

FAM193B (HGNC:25524): (family with sequence similarity 193 member B) Located in cytoplasm; nuclear speck; and nucleolus. [provided by Alliance of Genome Resources, Apr 2022]

FAM193B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.32826325).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FAM193B	NM_001190946.3 link	c.1784G>A	p.Arg595Gln	missense_variant	Exon 6 of 9	ENST00000514747.6	NP_001177875.1	Q6IPW0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FAM193B	ENST00000514747.6 link	c.1784G>A	p.Arg595Gln	missense_variant	Exon 6 of 9	5	NM_001190946.3	ENSP00000422131.1		Q96PV7-3

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152076

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.0000214

AC:

AN:

233334

Hom.:

AF XY:

0.0000236

AC XY:

AN XY:

127034

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:

0.0000355

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000283

Gnomad OTH exome

AF:

0.000179

GnomAD4 exome

AF:

0.0000835

AC:

121

AN:

1448524

Hom.:

Cov.:

AF XY:

0.0000639

AC XY:

AN XY:

720170

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:

0.0000119

Gnomad4 FIN exome

AF:

0.0000191

Gnomad4 NFE exome

AF:

0.000103

Gnomad4 OTH exome

AF:

0.0000836

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152076

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74288

show subpopulations

Gnomad4 AFR

AF:

0.0000241

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:

0.0000918

Hom.:

Bravo

AF:

0.0000529

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000121

AC:

ExAC

AF:

0.00000828

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 23, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1784G>A (p.R595Q) alteration is located in exon 6 (coding exon 6) of the FAM193B gene. This alteration results from a G to A substitution at nucleotide position 1784, causing the arginine (R) at amino acid position 595 to be replaced by a glutamine (Q). 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

BayesDel_addAF

Uncertain

0.070

BayesDel_noAF

Uncertain

-0.030

CADD

Pathogenic

DANN

Pathogenic

1.0

Eigen

Pathogenic

0.76

Eigen_PC

Pathogenic

0.76

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.96

M_CAP

Benign

0.024

MetaRNN

Benign

0.33

MetaSVM

Benign

-0.41

PrimateAI

Benign

0.46

PROVEAN

Benign

-1.5

REVEL

Benign

0.20

Sift

Uncertain

0.0050

Sift4G

Benign

0.11

Vest4

0.52

MVP

0.30

MPC

0.77

ClinPred

0.39

GERP RS

5.8

gMVP

0.50

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.19

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