chr18-11855801-C-G

Position:

• chr18-11855801-C-G

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The NM_182978.4(GNAL):​c.723-6594C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00211 in 151,950 control chromosomes in the GnomAD database, including 2 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 0.0021 (2 hom., cov: 32)
• Consequence: GNAL NM_182978.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.208

Genes affected

GNAL (HGNC:4388): (G protein subunit alpha L) This gene encodes a stimulatory G protein alpha subunit which mediates odorant signaling in the olfactory epithelium. This protein couples dopamine type 1 receptors and adenosine A2A receptors and is widely expressed in the central nervous system. Mutations in this gene have been associated with dystonia 25 and this gene is located in a susceptibility region for bipolar disorder and schizophrenia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2013]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00211 (320/151950) while in subpopulation AFR AF= 0.0075 (310/41356). AF 95% confidence interval is 0.00681. There are 2 homozygotes in gnomad4. There are 147 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 320 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GNAL	NM_001369387.1	c.492-6594C>G		intron_variant		ENST00000423027.8	NP_001356316.1
GNAL	NM_182978.4	c.723-6594C>G		intron_variant		ENST00000334049.11	NP_892023.1
GNAL	NM_001142339.3	c.492-6594C>G		intron_variant			NP_001135811.1
GNAL	NM_001261443.2	c.492-6594C>G		intron_variant			NP_001248372.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GNAL	ENST00000334049.11	c.723-6594C>G		intron_variant		1	NM_182978.4	ENSP00000334051
GNAL	ENST00000423027.8	c.492-6594C>G		intron_variant		1	NM_001369387.1	ENSP00000408489	P1

Frequencies

GnomAD3 genomes AF: 0.00209 AC: 318 AN: 151832 Hom.: 2 Cov.: 32

Gnomad AFR AF: 0.00747

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000621

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00144

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

GnomAD4 genome AF: 0.00211 AC: 320 AN: 151950 Hom.: 2 Cov.: 32 AF XY: 0.00198 AC XY: 147 AN XY: 74264

Gnomad4 AFR AF: 0.00750

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000622

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000294

Gnomad4 OTH AF: 0.00142

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.52
DANN	Benign	0.39

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: rs1249624; hg19: chr18-11855800;