chr2-235709184-T-A

Position:

• chr2-235709184-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001037131.3(AGAP1):​c.169T>A​(p.Phe57Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,844 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. F57F) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: AGAP1 NM_001037131.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.44

Genes affected

AGAP1 (HGNC:16922): (ArfGAP with GTPase domain, ankyrin repeat and PH domain 1) This gene encodes a member of an ADP-ribosylation factor GTPase-activating protein family involved in membrane trafficking and cytoskeleton dynamics. This gene functions as a direct regulator of the adaptor-related protein complex 3 on endosomes. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.783

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AGAP1	NM_001037131.3	c.169T>A	p.Phe57Ile	missense_variant	2/18	ENST00000304032.13
AGAP1	NM_014914.5	c.169T>A	p.Phe57Ile	missense_variant	2/17
AGAP1	NM_001244888.2	c.169T>A	p.Phe57Ile	missense_variant	2/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AGAP1	ENST00000304032.13	c.169T>A	p.Phe57Ile	missense_variant	2/18	5	NM_001037131.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461844 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727232

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 12, 2023

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. This variant has not been reported in the literature in individuals affected with AGAP1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces phenylalanine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 57 of the AGAP1 protein (p.Phe57Ile). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	28
DANN	Uncertain	0.98
DEOGEN2	Benign	0.057	.;.;T;.;T;T;T;T
Eigen	Uncertain	0.67
Eigen_PC	Uncertain	0.59
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Uncertain	0.90	D;D;D;D;D;D;D;D
M_CAP	Pathogenic	0.64	D
MetaRNN	Pathogenic	0.78	D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.75	D
MutationAssessor	Uncertain	2.2	M;M;M;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.94	D
PROVEAN	Uncertain	-3.5	D;N;N;D;N;.;.;.
REVEL	Pathogenic	0.67
Sift	Benign	0.12	T;T;T;D;D;.;.;.
Sift4G	Uncertain	0.032	D;D;D;D;T;D;D;D
Polyphen		1.0, 0.98	.;D;D;.;.;.;.;.
Vest4		0.88
MutPred		0.36		Loss of stability (P = 0.0688);Loss of stability (P = 0.0688);Loss of stability (P = 0.0688);.;.;.;.;.;
MVP		0.85
MPC		1.5
ClinPred		0.99	D
GERP RS		3.9
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.6
Varity_R		0.29
gMVP		0.85

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr2-236617828;