Genetic Variant FAM3B:p.Gly195Val (chr21-41348690-G-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_058186.4(FAM3B):c.584G>T(p.Gly195Val) variant causes a missense change. The variant allele was found at a frequency of 0.0000155 in 1,614,192 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

FAM3B
NM_058186.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.78

Variant links:

Genes affected

FAM3B (HGNC:1253): (FAM3 metabolism regulating signaling molecule B) Involved in insulin secretion. Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

FAM3B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.875

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FAM3B	NM_058186.4 link	c.584G>T	p.Gly195Val	missense_variant	Exon 7 of 8	ENST00000357985.7	NP_478066.3	P58499-1
FAM3B	NM_206964.2 link	c.440G>T	p.Gly147Val	missense_variant	Exon 6 of 7		NP_996847.1	P58499-3
FAM3B	XM_011529649.3 link	c.626G>T	p.Gly209Val	missense_variant	Exon 7 of 8		XP_011527951.1
FAM3B	XM_011529648.3 link	c.584G>T	p.Gly195Val	missense_variant	Exon 7 of 8		XP_011527950.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FAM3B	ENST00000357985.7 link	c.584G>T	p.Gly195Val	missense_variant	Exon 7 of 8	1	NM_058186.4	ENSP00000350673.2		P58499-1
FAM3B	ENST00000398652.7 link	c.701G>T	p.Gly234Val	missense_variant	Exon 8 of 9	1		ENSP00000381646.3		P58499-2

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152180

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:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000358

AC:

AN:

251480

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135914

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:

0.000261

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000164

AC:

AN:

1461894

Hom.:

Cov.:

AF XY:

0.0000206

AC XY:

AN XY:

727248

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:

0.000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152298

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74464

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:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.00000464

Hom.:

ExAC

AF:

0.0000494

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 18, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.584G>T (p.G195V) alteration is located in exon 7 (coding exon 7) of the FAM3B gene. This alteration results from a G to T substitution at nucleotide position 584, causing the glycine (G) at amino acid position 195 to be replaced by a valine (V). 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

0.64

BayesDel_addAF

Pathogenic

0.17

BayesDel_noAF

Pathogenic

0.31

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.61

D;.;.;.

Eigen

Pathogenic

0.77

Eigen_PC

Pathogenic

0.67

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.89

D;D;D;D

M_CAP

Uncertain

0.14

MetaRNN

Pathogenic

0.87

D;D;D;D

MetaSVM

Uncertain

0.33

MutationAssessor

Pathogenic

3.4

M;.;.;.

PrimateAI

Uncertain

0.51

PROVEAN

Pathogenic

-8.2

D;D;D;D

REVEL

Pathogenic

0.70

Sift

Pathogenic

0.0

D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D

Polyphen

1.0

D;.;D;D

Vest4

0.98

MutPred

0.61

.;.;.;Gain of methylation at K217 (P = 0.0353);

MVP

0.85

MPC

0.57

ClinPred

0.99

GERP RS

4.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.90

gMVP

0.89

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