chr20-58854692-C-T

Position:

chr20-58854692-C-T

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 2P and 9B. PM2BP4_StrongBP6BS1

The NM_016592.5(GNAS):c.*42+13806C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000034 in 1,528,628 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (no stars).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000020 ( 0 hom. )

Consequence

GNAS
NM_016592.5 intron

Scores

Clinical Significance

Likely benign no assertion criteria provided B:1O:1

Conservation

PhyloP100: -0.231

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.065704405).

BP6

Variant 20-58854692-C-T is Benign according to our data. Variant chr20-58854692-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 134481.Status of the report is no_assertion_criteria_provided, 0 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000164 (25/152012) while in subpopulation AFR AF= 0.000605 (25/41332). AF 95% confidence interval is 0.00042. There are 0 homozygotes in gnomad4. There are 14 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GNAS	NM_080425.4 linkuse as main transcript	c.1427C>T	p.Ala476Val	missense_variant	1/13	ENST00000371100.9	NP_536350.2
GNAS	NM_016592.5 linkuse as main transcript	c.*42+13806C>T		intron_variant		ENST00000371075.7	NP_057676.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GNAS	ENST00000371100.9 linkuse as main transcript	c.1427C>T	p.Ala476Val	missense_variant	1/13	5	NM_080425.4	ENSP00000360141		Q5JWF2-1
GNAS	ENST00000371075.7 linkuse as main transcript	c.*42+13806C>T		intron_variant		1	NM_016592.5	ENSP00000360115		O95467-1

Frequencies

GnomAD3 genomes

AF:

0.000164

AC:

AN:

152012

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000605

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000324

AC:

AN:

123628

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

68024

show subpopulations

Gnomad AFR exome

AF:

0.000773

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000196

AC:

AN:

1376616

Hom.:

Cov.:

AF XY:

0.0000147

AC XY:

AN XY:

679042

show subpopulations

Gnomad4 AFR exome

AF:

0.000879

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.000164

AC:

AN:

152012

Hom.:

Cov.:

AF XY:

0.000189

AC XY:

AN XY:

74262

show subpopulations

Gnomad4 AFR

AF:

0.000605

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:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000130

Hom.:

Bravo

AF:

0.000196

ExAC

AF:

0.0000136

AC:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1Other:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

GNAS-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jun 17, 2022

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

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

0.10

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.29

CADD

Benign

4.5

DANN

Uncertain

0.99

DEOGEN2

Benign

0.24

T;.;.

Eigen

Benign

-0.55

Eigen_PC

Benign

-0.69

FATHMM_MKL

Benign

0.061

LIST_S2

Benign

0.34

T;T;T

M_CAP

Benign

0.020

MetaRNN

Benign

0.066

T;T;T

MetaSVM

Benign

-0.98

MutationAssessor

Benign

1.2

L;.;L

MutationTaster

Benign

1.0

N;N;N;N;N;N;N

PrimateAI

Uncertain

0.76

PROVEAN

Benign

-0.17

N;N;N

REVEL

Benign

0.21

Sift

Benign

0.17

T;T;T

Sift4G

Benign

0.33

T;T;T

Polyphen

0.42

B;.;.

Vest4

0.11

MutPred

0.18

Loss of glycosylation at P477 (P = 0.0485);Loss of glycosylation at P477 (P = 0.0485);Loss of glycosylation at P477 (P = 0.0485);

MVP

0.61

MPC

0.41

ClinPred

0.039

GERP RS

2.9

Varity_R

0.038

gMVP

0.13

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