1-220190428-G-A

Position:

chr1-220190428-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4BS1_Supporting

The NM_012414.4(RAB3GAP2):c.1580C>T(p.Pro527Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000214 in 1,614,020 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00021 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00021 ( 1 hom. )

Consequence

RAB3GAP2
NM_012414.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:7

Conservation

PhyloP100: 7.76

Variant links:

Genes affected

RAB3GAP2 (HGNC:17168): (RAB3 GTPase activating non-catalytic protein subunit 2) The protein encoded by this gene belongs to the RAB3 protein family, members of which are involved in regulated exocytosis of neurotransmitters and hormones. This protein forms the Rab3 GTPase-activating complex with RAB3GAP1, where it constitutes the regulatory subunit, whereas the latter functions as the catalytic subunit. This gene has the highest level of expression in the brain, consistent with it having a key role in neurodevelopment. Mutations in this gene are associated with Martsolf syndrome.[provided by RefSeq, Oct 2009]

RAB3GAP2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.36521006).

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.00021 (32/152256) while in subpopulation AMR AF= 0.00144 (22/15298). AF 95% confidence interval is 0.000973. There are 0 homozygotes in gnomad4. There are 14 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RAB3GAP2	NM_012414.4 linkuse as main transcript	c.1580C>T	p.Pro527Leu	missense_variant	15/35	ENST00000358951.7	NP_036546.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RAB3GAP2	ENST00000358951.7 linkuse as main transcript	c.1580C>T	p.Pro527Leu	missense_variant	15/35	1	NM_012414.4	ENSP00000351832	P2	Q9H2M9-1

Frequencies

GnomAD3 genomes

AF:

0.000210

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00144

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000334

AC:

AN:

251330

Hom.:

AF XY:

0.000324

AC XY:

AN XY:

135824

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00113

Gnomad ASJ exome

AF:

0.000993

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000211

Gnomad OTH exome

AF:

0.00180

GnomAD4 exome

AF:

0.000215

AC:

314

AN:

1461764

Hom.:

Cov.:

AF XY:

0.000221

AC XY:

161

AN XY:

727194

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00136

Gnomad4 ASJ exome

AF:

0.000574

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000159

Gnomad4 OTH exome

AF:

0.000729

GnomAD4 genome

AF:

0.000210

AC:

AN:

152256

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74444

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.00144

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000209

Hom.:

Bravo

AF:

0.000616

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000189

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jan 17, 2020	In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Oct 15, 2019	- -

Global developmental delay;C4551563:Microcephaly

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

New York Genome Center

Jul 17, 2019

- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 12, 2021

The c.1580C>T (p.P527L) alteration is located in exon 15 (coding exon 15) of the RAB3GAP2 gene. This alteration results from a C to T substitution at nucleotide position 1580, causing the proline (P) at amino acid position 527 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Amenorrhea

Uncertain:1

Uncertain significance, no assertion criteria provided

literature only

Yale Center for Mendelian Genomics, Yale University

Mar 08, 2021

- -

Martsolf syndrome;C3280214:Warburg micro syndrome 2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 25, 2022

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 527 of the RAB3GAP2 protein (p.Pro527Leu). This variant is present in population databases (rs149563712, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with RAB3GAP2-related conditions. ClinVar contains an entry for this variant (Variation ID: 580491). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt RAB3GAP2 protein function. 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. -

RAB3GAP2-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 11, 2024

The RAB3GAP2 c.1580C>T variant is predicted to result in the amino acid substitution p.Pro527Leu. This variant has been reported in a homozygous state in an individual with RAB3GAP2-related disorder (Akula SK et al 2023. PubMed ID: 37486637) and in an individual with hypothalamic amenorrhoea, although the zygosity is unknown (Delaney et al 2021. PubMed ID: 32870266). This variant is reported in 0.11% of alleles in individuals of Latino descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

0.00075

BayesDel_noAF

Pathogenic

0.19

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.31

Eigen

Pathogenic

0.81

Eigen_PC

Pathogenic

0.82

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.94

M_CAP

Benign

0.052

MetaRNN

Benign

0.37

MetaSVM

Uncertain

0.52

MutationAssessor

Uncertain

2.2

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.62

PROVEAN

Pathogenic

-7.0

REVEL

Pathogenic

0.69

Sift

Pathogenic

0.0

Sift4G

Uncertain

0.0060

Polyphen

0.99

Vest4

0.79

MVP

0.64

MPC

0.30

ClinPred

0.17

GERP RS

5.9

Varity_R

0.76

gMVP

0.61

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over