chr20-48941883-C-T

Position:

chr20-48941883-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 3P and 5B. PM2PP2BP4_StrongBS1_Supporting

The NM_006420.3(ARFGEF2):c.172C>T(p.Pro58Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000536 in 1,614,244 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 0.00045 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00055 ( 0 hom. )

Consequence

ARFGEF2
NM_006420.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:6

Conservation

PhyloP100: 1.59

Variant links:

Genes affected

ARFGEF2 (HGNC:15853): (ADP ribosylation factor guanine nucleotide exchange factor 2) ADP-ribosylation factors (ARFs) play an important role in intracellular vesicular trafficking. The protein encoded by this gene is involved in the activation of ARFs by accelerating replacement of bound GDP with GTP and is involved in Golgi transport. It contains a Sec7 domain, which may be responsible for its guanine-nucleotide exchange activity and also brefeldin A inhibition. [provided by RefSeq, Jul 2008]

ARFGEF2 links:

Genome browser will be placed here

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;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ARFGEF2. . Gene score misZ 2.5971 (greater than the threshold 3.09). Trascript score misZ 4.3519 (greater than threshold 3.09). GenCC has associacion of gene with periventricular nodular heterotopia, periventricular heterotopia with microcephaly, autosomal recessive.

BP4

Computational evidence support a benign effect (MetaRNN=0.036744386).

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000453 (69/152358) while in subpopulation NFE AF= 0.000735 (50/68030). AF 95% confidence interval is 0.000572. There are 0 homozygotes in gnomad4. There are 30 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
ARFGEF2	NM_006420.3 linkuse as main transcript	c.172C>T	p.Pro58Ser	missense_variant	3/39	ENST00000371917.5
ARFGEF2	NM_001410846.1 linkuse as main transcript	c.172C>T	p.Pro58Ser	missense_variant	3/39
ARFGEF2	XM_047439832.1 linkuse as main transcript	c.-288-9440C>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ARFGEF2	ENST00000371917.5 linkuse as main transcript	c.172C>T	p.Pro58Ser	missense_variant	3/39	1	NM_006420.3	P4

Frequencies

GnomAD3 genomes

AF:

0.000453

AC:

AN:

152240

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000720

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:

0.000735

Gnomad OTH

AF:

0.00287

GnomAD3 exomes

AF:

0.000342

AC:

AN:

251490

Hom.:

AF XY:

0.000397

AC XY:

AN XY:

135920

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.000289

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:

0.000659

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000545

AC:

797

AN:

1461886

Hom.:

Cov.:

AF XY:

0.000539

AC XY:

392

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.000380

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000673

Gnomad4 OTH exome

AF:

0.000364

GnomAD4 genome

AF:

0.000453

AC:

AN:

152358

Hom.:

Cov.:

AF XY:

0.000403

AC XY:

AN XY:

74502

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.000719

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000735

Gnomad4 OTH

AF:

0.00284

Alfa

AF:

0.000607

Hom.:

Bravo

AF:

0.000438

TwinsUK

AF:

0.000809

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000814

AC:

ExAC

AF:

0.000362

AC:

EpiCase

AF:

0.000927

EpiControl

AF:

0.000771

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:4

Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	Jan 24, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Feb 27, 2020	In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Sep 27, 2022	This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 58 of the ARFGEF2 protein (p.Pro58Ser). This variant is present in population databases (rs149471454, gnomAD 0.06%). This variant has not been reported in the literature in individuals affected with ARFGEF2-related conditions. ClinVar contains an entry for this variant (Variation ID: 210226). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	May 17, 2016	- -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Jun 23, 2015

- -

See cases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein

Jan 16, 2020

ACMG classification criteria: PM2, BP4 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.37

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.18

Eigen

Uncertain

0.41

Eigen_PC

Uncertain

0.46

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.86

M_CAP

Benign

0.0082

MetaRNN

Benign

0.037

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.6

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.58

PROVEAN

Uncertain

-2.7

REVEL

Benign

0.13

Sift

Benign

0.098

Sift4G

Benign

0.24

Polyphen

0.98

Vest4

0.14

MVP

0.45

MPC

0.43

ClinPred

0.23

GERP RS

5.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.26

gMVP

0.44

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