Genetic Variant ARL13B:c.380+36G>T (chr3-94003944-G-T) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 2P and 8B. PM2BP4_StrongBS1

The NM_001174150.2(ARL13B):c.380+36G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000237 in 1,611,418 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0012 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

ARL13B
NM_001174150.2 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.163

Variant links:

Genes affected

ARL13B (HGNC:25419): (ADP ribosylation factor like GTPase 13B) This gene encodes a member of the ADP-ribosylation factor-like family. The encoded protein is a small GTPase that contains both N-terminal and C-terminal guanine nucleotide-binding motifs. This protein is localized in the cilia and plays a role in cilia formation and in maintenance of cilia. Mutations in this gene are the cause of Joubert syndrome 8. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Mar 2010]

ARL13B links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.83).

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00117 (178/152248) while in subpopulation AFR AF= 0.00392 (163/41560). AF 95% confidence interval is 0.00343. There are 1 homozygotes in gnomad4. There are 87 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ARL13B	NM_001174150.2 link	c.380+36G>T		intron_variant	Intron 3 of 9	ENST00000394222.8	NP_001167621.1	Q3SXY8-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ARL13B	ENST00000394222.8 link	c.380+36G>T		intron_variant	Intron 3 of 9	1	NM_001174150.2	ENSP00000377769.3		Q3SXY8-1

Frequencies

GnomAD3 genomes

AF:

0.00116

AC:

176

AN:

152132

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00389

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.000957

GnomAD3 exomes

AF:

0.000329

AC:

AN:

249200

Hom.:

AF XY:

0.000245

AC XY:

AN XY:

134922

show subpopulations

Gnomad AFR exome

AF:

0.00376

Gnomad AMR exome

AF:

0.000376

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000266

Gnomad OTH exome

AF:

0.000492

GnomAD4 exome

AF:

0.000140

AC:

204

AN:

1459170

Hom.:

Cov.:

AF XY:

0.000129

AC XY:

AN XY:

725934

show subpopulations

Gnomad4 AFR exome

AF:

0.00410

Gnomad4 AMR exome

AF:

0.000380

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000698

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000540

Gnomad4 OTH exome

AF:

0.000531

GnomAD4 genome

AF:

0.00117

AC:

178

AN:

152248

Hom.:

Cov.:

AF XY:

0.00117

AC XY:

AN XY:

74438

show subpopulations

Gnomad4 AFR

AF:

0.00392

Gnomad4 AMR

AF:

0.000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.000947

Alfa

AF:

0.0000429

Hom.:

Bravo

AF:

0.00139

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.83

CADD

Benign

0.29

DANN

Benign

0.45

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

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over