rs137854532

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1PM2PM5PP2PP3_Moderate

The NM_000516.7(GNAS):​c.493C>A​(p.Arg165Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R165C) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Consequence

GNAS
NM_000516.7 missense

Scores

12
6
1

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 5.16
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]

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

PM1
In a helix (size 4) in uniprot entity GNAS2_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_000516.7
PM2
Very rare variant in population databases, with high coverage;
PM5
Other missense variant is known to change same aminoacid residue: Variant chr20-58905443-C-T is described in Lovd as [Pathogenic].
PP2
Missense variant in the GNAS gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 58 curated pathogenic missense variants (we use a threshold of 10). The gene has 64 curated benign missense variants. Gene score misZ: 2.6546 (below the threshold of 3.09). Trascript score misZ: 4.8361 (above the threshold of 3.09). GenCC associations: The gene is linked to ACTH-independent macronodular adrenal hyperplasia 1, pseudohypoparathyroidism type 1B, pseudohypoparathyroidism type 1C, pseudohypoparathyroidism type 1A, progressive osseous heteroplasia, pseudopseudohypoparathyroidism, McCune-Albright syndrome.
PP3
MetaRNN computational evidence supports a deleterious effect, 0.913

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
GNASNM_000516.7 linkc.493C>A p.Arg165Ser missense_variant Exon 6 of 13 ENST00000371085.8 NP_000507.1 P63092-1O95467A0A0S2Z3H8
GNASNM_016592.5 linkc.*399C>A 3_prime_UTR_variant Exon 6 of 13 ENST00000371075.7 NP_057676.1 O95467-1

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
GNASENST00000371085.8 linkc.493C>A p.Arg165Ser missense_variant Exon 6 of 13 1 NM_000516.7 ENSP00000360126.3 P63092-1
GNASENST00000676826.2 linkc.2425C>A p.Arg809Ser missense_variant Exon 6 of 13 ENSP00000504675.2 A0A7I2V5R6
GNASENST00000371102.8 linkc.2380C>A p.Arg794Ser missense_variant Exon 5 of 12 5 ENSP00000360143.4 Q5JWF2-2
GNASENST00000354359.12 linkc.496C>A p.Arg166Ser missense_variant Exon 6 of 13 1 ENSP00000346328.7 P63092-4
GNASENST00000371095.7 linkc.451C>A p.Arg151Ser missense_variant Exon 5 of 12 1 ENSP00000360136.3 P63092-2
GNASENST00000470512.6 linkc.319C>A p.Arg107Ser missense_variant Exon 6 of 13 5 ENSP00000499552.2 A0A590UJQ9
GNASENST00000480232.6 linkc.319C>A p.Arg107Ser missense_variant Exon 7 of 14 5 ENSP00000499545.2 A0A590UJQ9
GNASENST00000663479.2 linkc.319C>A p.Arg107Ser missense_variant Exon 6 of 13 ENSP00000499353.2 A0A590UJQ9
GNASENST00000462499.6 linkc.274C>A p.Arg92Ser missense_variant Exon 5 of 12 2 ENSP00000499758.2 A0A590UK28
GNASENST00000467227.6 linkc.274C>A p.Arg92Ser missense_variant Exon 6 of 13 3 ENSP00000499681.2 A0A590UK28
GNASENST00000478585.6 linkc.274C>A p.Arg92Ser missense_variant Exon 5 of 12 2 ENSP00000499762.2 A0A590UK28
GNASENST00000481039.6 linkc.274C>A p.Arg92Ser missense_variant Exon 5 of 12 5 ENSP00000499767.2 A0A590UK28
GNASENST00000485673.6 linkc.274C>A p.Arg92Ser missense_variant Exon 5 of 12 5 ENSP00000499334.2 A0A590UK28
GNASENST00000488546.6 linkc.274C>A p.Arg92Ser missense_variant Exon 5 of 12 5 ENSP00000499332.2 A0A590UK28
GNASENST00000492907.6 linkc.274C>A p.Arg92Ser missense_variant Exon 5 of 12 3 ENSP00000499443.2 A0A590UK28
GNASENST00000371075.7 linkc.*399C>A 3_prime_UTR_variant Exon 6 of 13 1 NM_016592.5 ENSP00000360115.3 O95467-1
GNASENST00000453292.7 linkc.*354C>A 3_prime_UTR_variant Exon 5 of 12 5 ENSP00000392000.2 O95467-1A2A2S1

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
Cov.:
28
GnomAD4 genome
Cov.:
32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
1.0
BayesDel_addAF
Pathogenic
0.57
D
BayesDel_noAF
Pathogenic
0.58
CADD
Pathogenic
32
DANN
Uncertain
1.0
DEOGEN2
Pathogenic
0.86
D;.;.;.;.;D;.;.;T
Eigen
Uncertain
0.59
Eigen_PC
Uncertain
0.60
FATHMM_MKL
Uncertain
0.85
D
LIST_S2
Pathogenic
0.99
D;D;D;D;D;D;D;D;D
M_CAP
Pathogenic
0.55
D
MetaRNN
Pathogenic
0.91
D;D;D;D;D;D;D;D;D
MetaSVM
Uncertain
0.11
D
MutationAssessor
Pathogenic
3.8
.;.;.;.;.;H;.;.;.
PrimateAI
Uncertain
0.77
T
PROVEAN
Pathogenic
-5.8
D;D;D;.;D;D;D;D;.
REVEL
Pathogenic
0.90
Sift
Pathogenic
0.0
D;D;D;.;D;D;D;D;.
Sift4G
Pathogenic
0.0
D;D;D;D;D;D;D;D;D
Polyphen
1.0
D;.;.;.;.;D;.;D;.
Vest4
0.86
MutPred
0.73
Gain of phosphorylation at Y812 (P = 0.1196);.;.;.;.;.;.;.;.;
MVP
1.0
MPC
3.3
ClinPred
1.0
D
GERP RS
4.9
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.7
Varity_R
0.98
gMVP
0.95

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr20-57480498; API