18-11689831-A-G

Position:

chr18-11689831-A-G

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_182978.4(GNAL):c.268A>G(p.Lys90Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000143 in 1,537,564 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/16 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

GNAL
NM_182978.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.0610

Variant links:

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]

GNAL links:

GNAL (HGNC:):

GNAL links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.08064264).

BS2

High AC in GnomAdExome4 at 20 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GNAL	NM_182978.4 linkuse as main transcript	c.268A>G	p.Lys90Glu	missense_variant	1/12	ENST00000334049.11	NP_892023.1	P38405-2
GNAL	XM_006722324.4 linkuse as main transcript	c.268A>G	p.Lys90Glu	missense_variant	1/6		XP_006722387.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GNAL	ENST00000334049.11 linkuse as main transcript	c.268A>G	p.Lys90Glu	missense_variant	1/12	1	NM_182978.4	ENSP00000334051.5		P38405-2
GNAL	ENST00000585590.1 linkuse as main transcript	n.142A>G		non_coding_transcript_exon_variant	1/2	2

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

151916

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000354

AC:

AN:

141210

Hom.:

AF XY:

0.0000382

AC XY:

AN XY:

78554

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000861

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000144

AC:

AN:

1385648

Hom.:

Cov.:

AF XY:

0.0000146

AC XY:

AN XY:

685480

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000255

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000167

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000132

AC:

AN:

151916

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74218

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

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

ExAC

AF:

0.00000866

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Dystonic disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 29, 2018

This sequence change replaces lysine with glutamic acid at codon 90 of the GNAL protein (p.Lys90Glu). The lysine residue is weakly conserved and there is a small physicochemical difference between lysine and glutamic acid.¬†The GNAL gene has multiple clinically relevant isoforms. The c.268A>G variant occurs in alternate transcript NM_182978.3, which corresponds to position c.-61978A>G in NM_001142339.2, the primary transcript listed in the Methods. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the ExAC database. This variant has not been reported in the literature in individuals with GNAL-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.099

BayesDel_noAF

Benign

-0.38

CADD

Benign

9.0

DANN

Benign

0.48

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.58

LIST_S2

Benign

0.36

M_CAP

Uncertain

0.19

MetaRNN

Benign

0.081

MetaSVM

Benign

-0.59

PrimateAI

Uncertain

0.73

PROVEAN

Benign

1.1

REVEL

Benign

0.23

Sift

Benign

0.84

Sift4G

Benign

1.0

Vest4

0.11

MutPred

0.32

Loss of ubiquitination at K90 (P = 0.002);

MVP

0.45

MPC

1.7

ClinPred

0.050

gMVP

0.12

Splicing

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over