chr20-63278940-C-T

Variant names:

• chr20-63278940-C-T
• rs748362337
• NM_018209.4:c.572C>T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_018209.4(ARFGAP1):​c.572C>T​(p.Pro191Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000366 in 1,614,000 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. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000038 (0 hom.)
• Consequence: ARFGAP1 NM_018209.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.37

Genes affected

ARFGAP1 (HGNC:15852): (ADP ribosylation factor GTPase activating protein 1) The protein encoded by this gene is a GTPase-activating protein, which associates with the Golgi apparatus and which interacts with ADP-ribosylation factor 1. The encoded protein promotes hydrolysis of ADP-ribosylation factor 1-bound GTP and is required for the dissociation of coat proteins from Golgi-derived membranes and vesicles. Dissociation of the coat proteins is required for the fusion of these vesicles with target compartments. The activity of this protein is stimulated by phosphoinosides and inhibited by phosphatidylcholine. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.075190574).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ARFGAP1	NM_018209.4	c.572C>T	p.Pro191Leu	missense_variant	Exon 7 of 13	ENST00000370283.9	NP_060679.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ARFGAP1	ENST00000370283.9	c.572C>T	p.Pro191Leu	missense_variant	Exon 7 of 13	1	NM_018209.4	ENSP00000359306.4

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152204 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000385

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000996 AC: 25 AN: 250992 Hom.: 0 AF XY: 0.000169 AC XY: 23 AN XY: 135862

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000326

Gnomad SAS exome AF: 0.000555

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000383 AC: 56 AN: 1461796 Hom.: 0 Cov.: 31 AF XY: 0.0000633 AC XY: 46 AN XY: 727174

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000756

Gnomad4 SAS exome AF: 0.000487

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000899

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152204 Hom.: 0 Cov.: 33 AF XY: 0.0000403 AC XY: 3 AN XY: 74350

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000385

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000434 Hom.: 0

Bravo AF: 0.0000151

ExAC AF: 0.000124 AC: 15

EpiCase AF: 0.0000545

EpiControl AF: 0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Aug 08, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.572C>T (p.P191L) alteration is located in exon 7 (coding exon 6) of the ARFGAP1 gene. This alteration results from a C to T substitution at nucleotide position 572, causing the proline (P) at amino acid position 191 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.063
BayesDel_addAF	Benign	-0.39	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.20	.;.;T;.;T;.;.;.;.
Eigen	Benign	-0.46
Eigen_PC	Benign	-0.45
FATHMM_MKL	Benign	0.40	N
LIST_S2	Uncertain	0.88	D;D;D;D;D;D;D;D;D
M_CAP	Benign	0.042	D
MetaRNN	Benign	0.075	T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	1.7	.;.;L;.;.;L;.;L;.
PrimateAI	Benign	0.37	T
PROVEAN	Uncertain	-4.1	D;D;D;D;D;D;D;D;D
REVEL	Benign	0.059
Sift	Benign	0.044	D;T;T;T;T;D;D;T;D
Sift4G	Uncertain	0.021	D;D;D;T;T;D;T;D;D
Polyphen		0.0030, 0.10	.;.;B;.;.;.;.;B;.
Vest4		0.28
MutPred		0.32		.;.;Loss of glycosylation at P191 (P = 0.0046);.;.;Loss of glycosylation at P191 (P = 0.0046);.;Loss of glycosylation at P191 (P = 0.0046);Loss of glycosylation at P191 (P = 0.0046);
MVP		0.61
MPC		0.13
ClinPred		0.12	T
GERP RS		3.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.067
gMVP		0.42

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

Other links and lift over

dbSNP: rs748362337; hg19: chr20-61910292;