1-220148738-CT-C

Position:

• chr1-220148738-CT-C

Variant summary

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

The NM_012414.4(RAB3GAP2):​c.*2512del variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000455 in 151,502 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00046 (0 hom., cov: 32)
  • Failed GnomAD Quality Control
• Consequence: RAB3GAP2 NM_012414.4 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: -1.83

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]

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
RAB3GAP2	NM_012414.4	c.*2512del		3_prime_UTR_variant	35/35	ENST00000358951.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RAB3GAP2	ENST00000358951.7	c.*2512del		3_prime_UTR_variant	35/35	1	NM_012414.4	P2

Frequencies

GnomAD3 genomes AF: 0.000456 AC: 69 AN: 151392 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000534

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00112

Gnomad ASJ AF: 0.00174

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000418

Gnomad FIN AF: 0.0000954

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000280

Gnomad OTH AF: 0.000483

GnomAD4 exome Data not reliable, filtered out with message: AC0 AC: 0 AN: 0 Hom.: 0 Cov.: 0 AC XY: 0 AN XY: 0

GnomAD4 genome AF: 0.000455 AC: 69 AN: 151502 Hom.: 0 Cov.: 32 AF XY: 0.000473 AC XY: 35 AN XY: 74036

Gnomad4 AFR AF: 0.000533

Gnomad4 AMR AF: 0.00112

Gnomad4 ASJ AF: 0.00174

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000418

Gnomad4 FIN AF: 0.0000954

Gnomad4 NFE AF: 0.000280

Gnomad4 OTH AF: 0.000478

Bravo AF: 0.000695

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Warburg micro syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Martsolf syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Computational scores

Source: dbNSFP v4.3

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: rs143756119; hg19: chr1-220322080;