rs143570842

Positions:

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 1P and 13B. PP2BP4_StrongBP6BS1BS2

The NM_006420.3(ARFGEF2):c.811C>G(p.Pro271Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00274 in 1,614,064 control chromosomes in the GnomAD database, including 7 homozygotes. 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0029 ( 7 hom. )

Consequence

ARFGEF2
NM_006420.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:5

Conservation

PhyloP100: -0.695

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 Benign. Variant got -12 ACMG points.

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=0.009641409).

BP6

Variant 20-48953763-C-G is Benign according to our data. Variant chr20-48953763-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 128446.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=4, Uncertain_significance=2}. Variant chr20-48953763-C-G is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00162 (247/152272) while in subpopulation NFE AF= 0.00295 (201/68034). AF 95% confidence interval is 0.00262. There are 0 homozygotes in gnomad4. There are 114 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 7 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
ARFGEF2	NM_006420.3 linkuse as main transcript	c.811C>G	p.Pro271Ala	missense_variant	6/39	ENST00000371917.5	NP_006411.2
ARFGEF2	NM_001410846.1 linkuse as main transcript	c.811C>G	p.Pro271Ala	missense_variant	6/39		NP_001397775.1
ARFGEF2	XM_047439832.1 linkuse as main transcript	c.247C>G	p.Pro83Ala	missense_variant	4/37		XP_047295788.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ARFGEF2	ENST00000371917.5 linkuse as main transcript	c.811C>G	p.Pro271Ala	missense_variant	6/39	1	NM_006420.3	ENSP00000360985	P4

Frequencies

GnomAD3 genomes

AF:

0.00162

AC:

247

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000579

Gnomad AMI

AF:

0.0197

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000944

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00295

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.00129

AC:

323

AN:

251010

Hom.:

AF XY:

0.00131

AC XY:

178

AN XY:

135722

show subpopulations

Gnomad AFR exome

AF:

0.000615

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.000277

Gnomad NFE exome

AF:

0.00260

Gnomad OTH exome

AF:

0.000816

GnomAD4 exome

AF:

0.00285

AC:

4169

AN:

1461792

Hom.:

Cov.:

AF XY:

0.00277

AC XY:

2013

AN XY:

727194

show subpopulations

Gnomad4 AFR exome

AF:

0.000388

Gnomad4 AMR exome

AF:

0.000112

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000696

Gnomad4 FIN exome

AF:

0.000543

Gnomad4 NFE exome

AF:

0.00360

Gnomad4 OTH exome

AF:

0.00184

GnomAD4 genome

AF:

0.00162

AC:

247

AN:

152272

Hom.:

Cov.:

AF XY:

0.00153

AC XY:

114

AN XY:

74452

show subpopulations

Gnomad4 AFR

AF:

0.000578

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000944

Gnomad4 NFE

AF:

0.00295

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.00222

Hom.:

Bravo

AF:

0.00167

TwinsUK

AF:

0.00512

AC:

ALSPAC

AF:

0.00285

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00256

AC:

ExAC

AF:

0.00123

AC:

150

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:3

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 11, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Aug 09, 2024	See Variant Classification Assertion Criteria. -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Nov 01, 2023	ARFGEF2: BP4 -

not specified

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	Oct 04, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Jul 07, 2017	- -

Periventricular heterotopia with microcephaly, autosomal recessive

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

ARFGEF2-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

May 22, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.054

BayesDel_addAF

Benign

-0.65

BayesDel_noAF

Benign

-0.70

CADD

Benign

1.3

DANN

Benign

0.30

DEOGEN2

Benign

0.11

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.070

LIST_S2

Benign

0.41

M_CAP

Benign

0.0040

MetaRNN

Benign

0.0096

MetaSVM

Benign

-0.98

MutationAssessor

Benign

0.55

MutationTaster

Benign

1.0

PrimateAI

Benign

0.24

PROVEAN

Benign

-0.54

REVEL

Benign

0.080

Sift

Benign

0.50

Sift4G

Benign

0.23

Polyphen

0.0

Vest4

0.10

MVP

0.15

MPC

0.41

ClinPred

0.0027

GERP RS

-1.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.012

gMVP

0.32

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