Genetic Variant EXOC3:p.Arg22Cys (chr5-446269-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_007277.5(EXOC3):c.64C>T(p.Arg22Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000223 in 1,613,836 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 0.00018 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00023 ( 1 hom. )

Consequence

EXOC3
NM_007277.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.02

Variant links:

Genes affected

EXOC3 (HGNC:30378): (exocyst complex component 3) The protein encoded by this gene is a component of the exocyst complex, a multiple protein complex essential for targeting exocytic vesicles to specific docking sites on the plasma membrane. Though best characterized in yeast, the component proteins and functions of exocyst complex have been demonstrated to be highly conserved in higher eukaryotes. At least eight components of the exocyst complex, including this protein, are found to interact with the actin cytoskeletal remodeling and vesicle transport machinery. The complex is also essential for the biogenesis of epithelial cell surface polarity. [provided by RefSeq, Jul 2008]

EXOC3 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.013579756).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
EXOC3	NM_007277.5 link	c.64C>T	p.Arg22Cys	missense_variant	Exon 2 of 13	ENST00000512944.6	NP_009208.2	O60645A0A024QYZ6Q69YP2
EXOC3	XM_047416683.1 link	c.64C>T	p.Arg22Cys	missense_variant	Exon 2 of 7		XP_047272639.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
EXOC3	ENST00000512944.6 link	c.64C>T	p.Arg22Cys	missense_variant	Exon 2 of 13	1	NM_007277.5	ENSP00000425587.1		O60645

Frequencies

GnomAD3 genomes

AF:

0.000184

AC:

AN:

152200

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

Gnomad ASJ

AF:

0.00461

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.000454

AC:

113

AN:

249138

Hom.:

AF XY:

0.000437

AC XY:

AN XY:

135156

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000203

Gnomad ASJ exome

AF:

0.00826

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000151

Gnomad OTH exome

AF:

0.000993

GnomAD4 exome

AF:

0.000227

AC:

332

AN:

1461636

Hom.:

Cov.:

AF XY:

0.000250

AC XY:

182

AN XY:

727100

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000246

Gnomad4 ASJ exome

AF:

0.00846

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000477

Gnomad4 OTH exome

AF:

0.000762

GnomAD4 genome

AF:

0.000184

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

AN XY:

74352

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000589

Gnomad4 ASJ

AF:

0.00461

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000956

Alfa

AF:

0.000604

Hom.:

Bravo

AF:

0.000230

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000480

AC:

ExAC

AF:

0.000240

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 06, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.64C>T (p.R22C) alteration is located in exon 2 (coding exon 1) of the EXOC3 gene. This alteration results from a C to T substitution at nucleotide position 64, causing the arginine (R) at amino acid position 22 to be replaced by a cysteine (C). 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

0.94

BayesDel_addAF

Benign

-0.067

BayesDel_noAF

Uncertain

-0.050

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.37

.;T;.

Eigen

Uncertain

0.20

Eigen_PC

Uncertain

0.27

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.95

.;D;D

M_CAP

Benign

0.021

MetaRNN

Benign

0.014

T;T;T

MetaSVM

Benign

-1.1

PrimateAI

Pathogenic

0.91

PROVEAN

Pathogenic

-6.0

D;D;D

REVEL

Benign

0.20

Sift

Pathogenic

0.0

D;D;D

Sift4G

Uncertain

0.0030

D;D;D

Vest4

0.90

MVP

0.42

MPC

1.6

ClinPred

0.19

GERP RS

4.3

RBP_binding_hub_radar

0.97

RBP_regulation_power_radar

2.8

gMVP

0.62

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