chr3-97768108-A-G

Position:

• chr3-97768108-A-G

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_001278293.3(ARL6):​c.1A>G​(p.Met1?) variant causes a start lost change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ARL6 NM_001278293.3 start_lost
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 8.70

Genes affected

ARL6 (HGNC:13210): (ADP ribosylation factor like GTPase 6) The protein encoded by this gene belongs to the ARF-like (ADP ribosylation factor-like) sub-family of the ARF family of GTP-binding proteins which are involved in regulation of intracellular traffic. Mutations in this gene are associated with Bardet-Biedl syndrome (BBS). A vision-specific transcript, encoding long isoform BBS3L, has been described (PMID: 20333246). [provided by RefSeq, Apr 2016]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Start lost variant, no new inframe start found.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 3-97768108-A-G is Pathogenic according to our data. Variant chr3-97768108-A-G is described in ClinVar as [Pathogenic]. Clinvar id is 1446585.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ARL6	NM_001278293.3	c.1A>G	p.Met1?	start_lost	2/8	ENST00000463745.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ARL6	ENST00000463745.6	c.1A>G	p.Met1?	start_lost	2/8	2	NM_001278293.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Bardet-Biedl syndrome 3;C3150808:Retinitis pigmentosa 55 Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 27, 2022

For these reasons, this variant has been classified as Pathogenic. This variant disrupts a region of the ARL6 protein in which other variant(s) (p.Thr31Arg) have been determined to be pathogenic (PMID: 15314642, 19236846). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. ClinVar contains an entry for this variant (Variation ID: 1446585). This variant has not been reported in the literature in individuals affected with ARL6-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change affects the initiator methionine of the ARL6 mRNA. The next in-frame methionine is located at codon 70. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.25	D
BayesDel_noAF	Uncertain	0.13
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.76	D;D;D;T
Eigen	Benign	-0.047
Eigen_PC	Benign	0.077
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.90	.;D;.;D
M_CAP	Pathogenic	0.71	D
MetaRNN	Pathogenic	0.98	D;D;D;D
MetaSVM	Benign	-0.56	T
MutationTaster	Benign	1.0	D;D;D
PROVEAN	Uncertain	-3.4	D;D;D;D
REVEL	Uncertain	0.60
Sift	Pathogenic	0.0	D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		0.0	B;B;B;.
Vest4		0.95
MutPred		0.98		Loss of helix (P = 0.079);Loss of helix (P = 0.079);Loss of helix (P = 0.079);Loss of helix (P = 0.079);
MVP		0.80
ClinPred		0.99	D
GERP RS		4.6
Varity_R		0.82
gMVP		0.89

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: chr3-97486952;