Variant chr20-48921885-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBS1_Supporting

The NM_006420.3(ARFGEF2):c.-5G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000145 in 1,543,564 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 0.00021 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

ARFGEF2
NM_006420.3 5_prime_UTR

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.28

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 -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.45).

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000211 (32/152010) while in subpopulation AMR AF= 0.000261 (4/15300). AF 95% confidence interval is 0.0000887. There are 1 homozygotes in gnomad4. There are 19 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	Effect	#exon/exons	MANE	Protein	UniProt
ARFGEF2	NM_006420.3 link	c.-5G>A	5_prime_UTR_variant	1/39	ENST00000371917.5	NP_006411.2	Q9Y6D5Q86TH5Q59FR3
ARFGEF2	NM_001410846.1 link	c.-5G>A	5_prime_UTR_variant	1/39		NP_001397775.1
ARFGEF2	XM_047439832.1 link	c.-414G>A	5_prime_UTR_variant	1/37		XP_047295788.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ARFGEF2	ENST00000371917 link	c.-5G>A		5_prime_UTR_variant	1/39	1	NM_006420.3	ENSP00000360985.4		Q9Y6D5

Frequencies

GnomAD3 genomes

AF:

0.000211

AC:

AN:

151898

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000725

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00549

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000589

Gnomad OTH

AF:

0.000958

GnomAD3 exomes

AF:

0.000285

AC:

AN:

147168

Hom.:

AF XY:

0.000243

AC XY:

AN XY:

78220

show subpopulations

Gnomad AFR exome

AF:

0.000135

Gnomad AMR exome

AF:

0.000126

Gnomad ASJ exome

AF:

0.00425

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000359

Gnomad OTH exome

AF:

0.000238

GnomAD4 exome

AF:

0.000138

AC:

192

AN:

1391554

Hom.:

Cov.:

AF XY:

0.000135

AC XY:

AN XY:

686524

show subpopulations

Gnomad4 AFR exome

AF:

0.0000327

Gnomad4 AMR exome

AF:

0.0000568

Gnomad4 ASJ exome

AF:

0.00503

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000363

Gnomad4 OTH exome

AF:

0.000434

GnomAD4 genome

AF:

0.000211

AC:

AN:

152010

Hom.:

Cov.:

AF XY:

0.000256

AC XY:

AN XY:

74330

show subpopulations

Gnomad4 AFR

AF:

0.0000723

Gnomad4 AMR

AF:

0.000261

Gnomad4 ASJ

AF:

0.00549

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000589

Gnomad4 OTH

AF:

0.000948

Alfa

AF:

0.000495

Hom.:

Bravo

AF:

0.000162

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Periventricular heterotopia with microcephaly, autosomal recessive

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.45

CADD

Benign

DANN

Benign

0.92

Splicing

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