rs201597085

Positions:

chr20-58854253-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_080425.4(GNAS):c.988A>G(p.Ile330Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000036 in 1,613,192 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. I330I) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000036 ( 0 hom. )

Consequence

GNAS
NM_080425.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:2O:1

Conservation

PhyloP100: 0.146

Variant links:

Genes affected

GNAS (HGNC:4392): (GNAS complex locus) This locus has a highly complex imprinted expression pattern. It gives rise to maternally, paternally, and biallelically expressed transcripts that are derived from four alternative promoters and 5' exons. Some transcripts contain a differentially methylated region (DMR) at their 5' exons, and this DMR is commonly found in imprinted genes and correlates with transcript expression. An antisense transcript is produced from an overlapping locus on the opposite strand. One of the transcripts produced from this locus, and the antisense transcript, are paternally expressed noncoding RNAs, and may regulate imprinting in this region. In addition, one of the transcripts contains a second overlapping ORF, which encodes a structurally unrelated protein - Alex. Alternative splicing of downstream exons is also observed, which results in different forms of the stimulatory G-protein alpha subunit, a key element of the classical signal transduction pathway linking receptor-ligand interactions with the activation of adenylyl cyclase and a variety of cellular reponses. Multiple transcript variants encoding different isoforms have been found for this gene. Mutations in this gene result in pseudohypoparathyroidism type 1a, pseudohypoparathyroidism type 1b, Albright hereditary osteodystrophy, pseudopseudohypoparathyroidism, McCune-Albright syndrome, progressive osseus heteroplasia, polyostotic fibrous dysplasia of bone, and some pituitary tumors. [provided by RefSeq, Aug 2012]

GNAS links:

GNAS (HGNC:):

GNAS links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.06338331).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GNAS	NM_016592.5 linkuse as main transcript	c.*42+13367A>G		intron_variant		ENST00000371075.7	NP_057676.1	O95467-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
GNAS	ENST00000676826.2 linkuse as main transcript	c.988A>G	p.Ile330Val	missense_variant	1/13			ENSP00000504675.2	A0A7I2V5R6
GNAS	ENST00000371102.8 linkuse as main transcript	c.988A>G	p.Ile330Val	missense_variant	1/12	5		ENSP00000360143.4	Q5JWF2-2
GNAS	ENST00000371075.7 linkuse as main transcript	c.*42+13367A>G		intron_variant		1	NM_016592.5	ENSP00000360115.3	O95467-1
GNAS	ENST00000663479.2 linkuse as main transcript	c.-39+12378A>G		intron_variant				ENSP00000499353.2	A0A590UJQ9
GNAS	ENST00000462499.6 linkuse as main transcript	c.-39+12378A>G		intron_variant		2		ENSP00000499758.2	A0A590UK28
GNAS	ENST00000467227.6 linkuse as main transcript	c.-39+10179A>G		intron_variant		3		ENSP00000499681.2	A0A590UK28
GNAS	ENST00000453292.7 linkuse as main transcript	c.*42+13367A>G		intron_variant		5		ENSP00000392000.2	O95467-1A2A2S1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152148

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000387

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000770

AC:

AN:

246786

Hom.:

AF XY:

0.0000892

AC XY:

AN XY:

134496

show subpopulations

Gnomad AFR exome

AF:

0.0000662

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000334

Gnomad SAS exome

AF:

0.000229

Gnomad FIN exome

AF:

0.0000465

Gnomad NFE exome

AF:

0.0000359

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000356

AC:

AN:

1460926

Hom.:

Cov.:

AF XY:

0.0000454

AC XY:

AN XY:

726712

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000277

Gnomad4 SAS exome

AF:

0.000325

Gnomad4 FIN exome

AF:

0.0000189

Gnomad4 NFE exome

AF:

0.00000989

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152266

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74448

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000388

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.0000567

ExAC

AF:

0.0000662

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2Other:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

New York Genome Center

Jul 30, 2021

- -

GNAS-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

May 24, 2024

The GNAS c.988A>G variant is predicted to result in the amino acid substitution p.Ile330Val. Of note, in the more commonly reported transcript (NM_000516.5) this variant is pre-coding (c.-37474A>G). To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.033% of alleles in individuals of East Asian descent in gnomAD. Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

not specified

Other:1

not provided, no classification provided

reference population

ITMI

Sep 19, 2013

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.073

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.24

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.23

T;.;.

Eigen

Benign

-0.52

Eigen_PC

Benign

-0.39

FATHMM_MKL

Benign

0.27

LIST_S2

Benign

0.62

T;T;T

M_CAP

Uncertain

0.16

MetaRNN

Benign

0.063

T;T;T

MetaSVM

Benign

-0.60

MutationAssessor

Benign

0.90

L;.;L

PrimateAI

Uncertain

0.49

PROVEAN

Benign

-0.070

N;N;N

REVEL

Benign

0.22

Sift

Uncertain

0.0040

D;D;D

Sift4G

Benign

0.27

T;T;T

Polyphen

0.010

B;.;.

Vest4

0.15

MVP

0.55

MPC

0.34

ClinPred

0.076

GERP RS

2.6

Varity_R

0.096

gMVP

0.096

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