rs1115535

Variant names:

• chr20-48974027-T-C
• rs1115535
• NM_006420.3:c.1666-739T>C

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_006420.3(ARFGEF2):​c.1666-739T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.175 in 152,052 control chromosomes in the GnomAD database, including 3,068 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.18 (3068 hom., cov: 31)
• Consequence: ARFGEF2 NM_006420.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.04
• Publications: 9 publications found

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 Gene-Disease associations (from GenCC):

• periventricular heterotopia with microcephaly, autosomal recessive

  Inheritance: AR Classification: STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), ClinGen
• periventricular nodular heterotopia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.26 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006420.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARFGEF2	NM_006420.3	MANE Select	c.1666-739T>C		intron	N/A	NP_006411.2
	ARFGEF2	NM_001410846.1		c.1663-739T>C		intron	N/A	NP_001397775.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ARFGEF2	ENST00000371917.5	TSL:1 MANE Select	c.1666-739T>C		intron	N/A	ENSP00000360985.4
	ARFGEF2	ENST00000679436.1		c.1663-739T>C		intron	N/A	ENSP00000504888.1
	ARFGEF2	ENST00000681021.1		c.1666-739T>C		intron	N/A	ENSP00000505972.1

Frequencies

GnomAD3 genomes AF: 0.175 AC: 26630 AN: 151936 Hom.: 3067 Cov.: 31

Gnomad AFR AF: 0.0454

Gnomad AMI AF: 0.427

Gnomad AMR AF: 0.159

Gnomad ASJ AF: 0.168

Gnomad EAS AF: 0.0509

Gnomad SAS AF: 0.0908

Gnomad FIN AF: 0.229

Gnomad MID AF: 0.123

Gnomad NFE AF: 0.263

Gnomad OTH AF: 0.152

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.175 AC: 26632 AN: 152052 Hom.: 3068 Cov.: 31 AF XY: 0.170 AC XY: 12624 AN XY: 74330

African (AFR) AF: 0.0453 AC: 1881 AN: 41526

American (AMR) AF: 0.158 AC: 2417 AN: 15256

Ashkenazi Jewish (ASJ) AF: 0.168 AC: 583 AN: 3470

East Asian (EAS) AF: 0.0508 AC: 263 AN: 5176

South Asian (SAS) AF: 0.0915 AC: 441 AN: 4820

European-Finnish (FIN) AF: 0.229 AC: 2408 AN: 10532

Middle Eastern (MID) AF: 0.126 AC: 37 AN: 294

European-Non Finnish (NFE) AF: 0.263 AC: 17894 AN: 67962

Other (OTH) AF: 0.151 AC: 319 AN: 2106

Alfa AF: 0.235 Hom.: 6732

Bravo AF: 0.164

Asia WGS AF: 0.0920 AC: 321 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	5.9
DANN	Benign	0.65
PhyloP100		1.0
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs1115535; hg19: chr20-47590564;