rs374877331

chr18-11752923-C-T

Variant summary

Our verdict is Benign. Variant got -11 ACMG points: 0P and 11B. BP4_Strong BP6_Moderate BP7 BS2

The NM_182978.4(GNAL):c.447C>T(p.Pro149=) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000448 in 1,585,622 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000047 (0 hom.)
• Consequence: GNAL NM_182978.4 splice_region, synonymous
• Scores: Splicing: ADA: 0.01441
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.0800

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 -11 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.47).
• BP6: Variant 18-11752923-C-T is Benign according to our data. Variant chr18-11752923-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 526227.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-0.08 with no splicing effect.
• BS2: High AC in GnomAdExome at 22 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GNAL	NM_182978.4	c.447C>T	p.Pro149=	splice_region_variant, synonymous_variant	2/12	ENST00000334049.11
GNAL	NM_001369387.1	c.216C>T	p.Pro72=	splice_region_variant, synonymous_variant	2/12	ENST00000423027.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GNAL	ENST00000334049.11	c.447C>T	p.Pro149=	splice_region_variant, synonymous_variant	2/12	1	NM_182978.4
GNAL	ENST00000423027.8	c.216C>T	p.Pro72=	splice_region_variant, synonymous_variant	2/12	1	NM_001369387.1	P1

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152146 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.000576

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000879 AC: 22 AN: 250408 Hom.: 0 AF XY: 0.0000812 AC XY: 11 AN XY: 135408

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00179

Gnomad EAS exome AF: 0.0000547

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000265

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000467 AC: 67 AN: 1433476 Hom.: 0 Cov.: 26 AF XY: 0.0000475 AC XY: 34 AN XY: 715154

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00170

Gnomad4 EAS exome AF: 0.0000253

Gnomad4 SAS exome AF: 0.0000351

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000101

Gnomad4 OTH exome AF: 0.000118

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152146 Hom.: 0 Cov.: 32 AF XY: 0.0000404 AC XY: 3 AN XY: 74318

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.000576

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000294

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000313 Hom.: 0

Bravo AF: 0.0000793

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Dystonic disorder Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 15, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.47
Cadd	Benign	11
Dann	Benign	0.72

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.014
dbscSNV1_RF	Benign	0.16
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: rs374877331; hg19: chr18-11752922; COSMIC: COSV52335154; COSMIC: COSV52335154;