Genetic Variant ARFGAP1:p.Thr157Ile (chr20-63278143-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_018209.4(ARFGAP1):c.470C>T(p.Thr157Ile) 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 1,461,416 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

ARFGAP1
NM_018209.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.29

Publications

0 publications found

Variant links:

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]

ARFGAP1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.13568985).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ARFGAP1	NM_018209.4 link	c.470C>T	p.Thr157Ile	missense_variant	Exon 6 of 13	ENST00000370283.9	NP_060679.1	Q8N6T3-1Q53F62

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ARFGAP1	ENST00000370283.9 link	c.470C>T	p.Thr157Ile	missense_variant	Exon 6 of 13	1	NM_018209.4	ENSP00000359306.4		Q8N6T3-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461416

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726958

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53076

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000360

AC:

AN:

1111918

Other (OTH)

AF:

0.00

AC:

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 25, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.470C>T (p.T157I) alteration is located in exon 6 (coding exon 5) of the ARFGAP1 gene. This alteration results from a C to T substitution at nucleotide position 470, causing the threonine (T) at amino acid position 157 to be replaced by an isoleucine (I). 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

0.12

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.57

CADD

Benign

(source)

DANN

Benign

0.90

DEOGEN2

Benign

0.18

.;.;T;.;T;.;.;.;.

Eigen

Benign

-0.91

Eigen_PC

Benign

-0.94

FATHMM_MKL

Benign

0.49

LIST_S2

Benign

0.78

T;T;T;T;T;T;T;T;T

M_CAP

Benign

0.040

MetaRNN

Benign

0.14

T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.4

.;.;M;.;.;M;.;M;.

PhyloP100

2.3

PrimateAI

Benign

0.38

PROVEAN

Uncertain

-2.4

N;N;N;N;N;N;N;N;N

REVEL

Benign

0.046

Sift

Benign

0.060

T;D;T;D;D;T;D;D;T

Sift4G

Uncertain

0.024

D;T;T;T;T;T;T;T;T

Polyphen

0.012, 0.0010

.;.;B;.;.;.;.;B;.

Vest4

0.26

MutPred

0.28

.;.;Loss of disorder (P = 0.0477);.;.;Loss of disorder (P = 0.0477);.;Loss of disorder (P = 0.0477);Loss of disorder (P = 0.0477);

MVP

0.35

MPC

0.13

ClinPred

0.15

GERP RS

2.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.041

gMVP

0.31

Mutation Taster

=87/13

polymorphism

(source)

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

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20-63278143-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over