chr16-57245397-GCTGT-G

Position:

• chr16-57245397-GCTGT-G

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PVS1_Strong PM2 PP5_Moderate

The NM_012106.4(ARL2BP):​c.33_36delGTCT​(p.Phe13fs) variant causes a frameshift, splice region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ARL2BP NM_012106.4 frameshift, splice_region
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 1.82

Genes affected

ARL2BP (HGNC:17146): (ADP ribosylation factor like GTPase 2 binding protein) ADP-ribosylation factor (ARF)-like proteins (ARLs) comprise a functionally distinct group of the ARF family of RAS-related GTPases. The protein encoded by this gene binds to ARL2.GTP with high affinity but does not interact with ARL2.GDP, activated ARF, or RHO proteins. The lack of detectable membrane association of this protein or ARL2 upon activation of ARL2 is suggestive of actions distinct from those of the ARFs. This protein is considered to be the first ARL2-specific effector identified, due to its interaction with ARL2.GTP but lack of ARL2 GTPase-activating protein activity. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.933 CDS is truncated, and there are 1 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 16-57245397-GCTGT-G is Pathogenic according to our data. Variant chr16-57245397-GCTGT-G is described in ClinVar as [Pathogenic]. Clinvar id is 2577503.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ARL2BP	NM_012106.4	c.33_36delGTCT	p.Phe13fs	frameshift_variant, splice_region_variant	1/6	ENST00000219204.8	NP_036238.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ARL2BP	ENST00000219204.8	c.33_36delGTCT	p.Phe13fs	frameshift_variant, splice_region_variant	1/6	1	NM_012106.4	ENSP00000219204.3
ARL2BP	ENST00000563234.1	c.24_27delGTCT	p.Phe10fs	frameshift_variant, splice_region_variant	1/6	2		ENSP00000454237.1
ARL2BP	ENST00000562023.5	c.33_36delGTCT	p.Phe13fs	frameshift_variant, splice_region_variant	1/5	3		ENSP00000457465.1
ARL2BP	ENST00000565794.1	n.142_145delGTCT		splice_region_variant, non_coding_transcript_exon_variant	1/2	5

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Retinitis pigmentosa with or without situs inversus Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Aug 27, 2024

- -

Retinitis pigmentosa Pathogenic:1

Pathogenic, criteria provided, single submitter

research

Ophthalmic Genetics Group, Institute of Molecular and Clinical Ophthalmology Basel

Jul 24, 2023

Clinical significance based on ACMG v2.0 -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: chr16-57279309;