2-235709224-C-T

Position:

• chr2-235709224-C-T

Variant summary

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

The NM_001037131.3(AGAP1):​c.209C>T​(p.Pro70Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000289 in 1,613,964 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. P70P) has been classified as Benign.

• Frequency:
  • Genomes: 𝑓 0.00014 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00030 (1 hom.)
• Consequence: AGAP1 NM_001037131.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.34

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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AGAP1	NM_001037131.3	c.209C>T	p.Pro70Leu	missense_variant	2/18	ENST00000304032.13
AGAP1	NM_014914.5	c.209C>T	p.Pro70Leu	missense_variant	2/17
AGAP1	NM_001244888.2	c.209C>T	p.Pro70Leu	missense_variant	2/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AGAP1	ENST00000304032.13	c.209C>T	p.Pro70Leu	missense_variant	2/18	5	NM_001037131.3

Frequencies

GnomAD3 genomes AF: 0.000145 AC: 22 AN: 152104 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000623

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000250

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000334 AC: 84 AN: 251464 Hom.: 0 AF XY: 0.000324 AC XY: 44 AN XY: 135908

Gnomad AFR exome AF: 0.000123

Gnomad AMR exome AF: 0.000578

Gnomad ASJ exome AF: 0.0000992

Gnomad EAS exome AF: 0.000163

Gnomad SAS exome AF: 0.000555

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000352

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000304 AC: 445 AN: 1461860 Hom.: 1 Cov.: 31 AF XY: 0.000329 AC XY: 239 AN XY: 727238

Gnomad4 AFR exome AF: 0.000119

Gnomad4 AMR exome AF: 0.000492

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.000126

Gnomad4 SAS exome AF: 0.000487

Gnomad4 FIN exome AF: 0.0000562

Gnomad4 NFE exome AF: 0.000315

Gnomad4 OTH exome AF: 0.000248

GnomAD4 genome AF: 0.000145 AC: 22 AN: 152104 Hom.: 0 Cov.: 32 AF XY: 0.000175 AC XY: 13 AN XY: 74286

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.0000655

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000623

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000250

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000213 Hom.: 0

Bravo AF: 0.000238

TwinsUK AF: 0.000270 AC: 1

ALSPAC AF: 0.000259 AC: 1

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.000305 AC: 37

EpiCase AF: 0.000327

EpiControl AF: 0.000474

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

Oct 15, 2023

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 70 of the AGAP1 protein (p.Pro70Leu). This variant is present in population databases (rs139445824, gnomAD 0.06%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with AGAP1-related conditions. ClinVar contains an entry for this variant (Variation ID: 2040856). 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. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.62
BayesDel_addAF	Benign	-0.042	T
BayesDel_noAF	Uncertain	0.060
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Benign	0.27	.;.;T;.;T;T;T;T
Eigen	Uncertain	0.60
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Pathogenic	0.98	D;D;D;D;D;D;D;D
M_CAP	Benign	0.059	D
MetaRNN	Uncertain	0.46	T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.87	T
MutationAssessor	Benign	1.8	L;L;L;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-8.8	D;D;D;D;D;.;.;.
REVEL	Uncertain	0.46
Sift	Benign	0.067	T;D;T;T;D;.;.;.
Sift4G	Benign	0.083	T;T;T;T;T;T;T;T
Polyphen		1.0, 1.0	.;D;D;.;.;.;.;.
Vest4		0.96
MVP		0.77
MPC		1.3
ClinPred		0.23	T
GERP RS		3.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.43
gMVP		0.72

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: rs139445824; hg19: chr2-236617868;