Variant chr20-48965978-C-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 3P and 6B. PM2PP2BP4_ModerateBS1

The ENST00000371917.5(ARFGEF2):c.1014C>A(p.Asn338Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,832 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. N338N) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

ARFGEF2
ENST00000371917.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.918

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:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 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=0.2299698).

BS1

Variant frequency is greater than expected in population amr. gnomad4_exome allele frequency = 0.00000274 (4/1461832) while in subpopulation AMR AF= 0.0000894 (4/44720). AF 95% confidence interval is 0.0000298. There are 0 homozygotes in gnomad4_exome. There are 3 alleles in male gnomad4_exome subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
ARFGEF2	NM_006420.3 linkuse as main transcript	c.1014C>A	p.Asn338Lys	missense_variant	8/39	ENST00000371917.5	NP_006411.2
ARFGEF2	NM_001410846.1 linkuse as main transcript	c.1011C>A	p.Asn337Lys	missense_variant	8/39		NP_001397775.1
ARFGEF2	XM_047439832.1 linkuse as main transcript	c.450C>A	p.Asn150Lys	missense_variant	6/37		XP_047295788.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ARFGEF2	ENST00000371917.5 linkuse as main transcript	c.1014C>A	p.Asn338Lys	missense_variant	8/39	1	NM_006420.3	ENSP00000360985	P4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251430

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135886

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000867

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461832

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727220

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000894

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000508

Hom.:

ExAC

AF:

0.00000824

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.31

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.54

CADD

Benign

5.1

DANN

Benign

0.94

DEOGEN2

Benign

0.20

Eigen

Benign

-1.9

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.33

LIST_S2

Uncertain

0.88

M_CAP

Benign

0.012

MetaRNN

Benign

0.23

MetaSVM

Benign

-0.90

MutationAssessor

Benign

0.97

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.68

PROVEAN

Uncertain

-2.6

REVEL

Benign

0.083

Sift

Benign

0.051

Sift4G

Benign

0.57

Polyphen

0.052

Vest4

0.73

MutPred

0.34

Gain of ubiquitination at N338 (P = 0.001);

MVP

0.42

MPC

0.92

ClinPred

0.10

GERP RS

-12

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.16

gMVP

0.43

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over