17-68515484-G-T

Position:

chr17-68515484-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate

The NM_002734.5(PRKAR1A):c.85G>T(p.Ala29Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000274 in 1,461,266 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 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. A29A) has been classified as Benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

PRKAR1A
NM_002734.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.73

Variant links:

Genes affected

PRKAR1A (HGNC:9388): (protein kinase cAMP-dependent type I regulatory subunit alpha) cAMP is a signaling molecule important for a variety of cellular functions. cAMP exerts its effects by activating the cAMP-dependent protein kinase, which transduces the signal through phosphorylation of different target proteins. The inactive kinase holoenzyme is a tetramer composed of two regulatory and two catalytic subunits. cAMP causes the dissociation of the inactive holoenzyme into a dimer of regulatory subunits bound to four cAMP and two free monomeric catalytic subunits. Four different regulatory subunits and three catalytic subunits have been identified in humans. This gene encodes one of the regulatory subunits. This protein was found to be a tissue-specific extinguisher that down-regulates the expression of seven liver genes in hepatoma x fibroblast hybrids. Mutations in this gene cause Carney complex (CNC). This gene can fuse to the RET protooncogene by gene rearrangement and form the thyroid tumor-specific chimeric oncogene known as PTC2. A nonconventional nuclear localization sequence (NLS) has been found for this protein which suggests a role in DNA replication via the protein serving as a nuclear transport protein for the second subunit of the Replication Factor C (RFC40). Several alternatively spliced transcript variants encoding two different isoforms have been observed. [provided by RefSeq, Jan 2013]

PRKAR1A links:

PRKAR1A (HGNC:):

PRKAR1A links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PRKAR1A. . Gene score misZ 3.1236 (greater than the threshold 3.09). Trascript score misZ 4.1467 (greater than threshold 3.09). GenCC has associacion of gene with acrodysostosis with multiple hormone resistance, pigmented nodular adrenocortical disease, primary, 1, primary pigmented nodular adrenocortical disease, acrodysostosis, Carney complex, Acrodysostosis 1 with or without hormone resistance, Carney complex, type 1, familial atrial myxoma.

BP4

Computational evidence support a benign effect (MetaRNN=0.18250212).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PRKAR1A	NM_002734.5 linkuse as main transcript	c.85G>T	p.Ala29Ser	missense_variant	2/11	ENST00000589228.6	NP_002725.1	P10644-1B2R5T5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PRKAR1A	ENST00000589228.6 linkuse as main transcript	c.85G>T	p.Ala29Ser	missense_variant	2/11	1	NM_002734.5	ENSP00000464977.2		P10644-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251422

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135888

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:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461266

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

726940

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Carney complex, type 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 04, 2020

In summary, this variant is a rare missense change that is not predicted to affect protein function. There is no indication that it causes disease, but the available evidence is currently insufficient to prove that conclusively. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies. This variant is present in population databases (rs760726941, ExAC 0.002%) but has not been reported in the literature in individuals with a PRKAR1A-related disease. This sequence change replaces alanine with serine at codon 29 of the PRKAR1A protein (p.Ala29Ser). The alanine residue is moderately conserved and there is a moderate physicochemical difference between alanine and serine. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.076

BayesDel_addAF

Benign

-0.032

BayesDel_noAF

Benign

-0.28

CADD

Benign

DANN

Benign

0.72

DEOGEN2

Benign

0.015

T;T;T;T;T;T;T;.;.;T;T;T;.;.

Eigen

Benign

-0.39

Eigen_PC

Benign

-0.20

FATHMM_MKL

Uncertain

0.85

LIST_S2

Uncertain

0.94

D;.;D;D;.;.;D;D;D;D;D;.;D;D

M_CAP

Benign

0.037

MetaRNN

Benign

0.18

T;T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.83

MutationAssessor

Benign

1.1

.;L;L;.;L;L;.;.;.;.;.;L;.;L

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-0.090

.;N;N;.;.;N;.;.;.;.;.;.;.;.

REVEL

Benign

0.20

Sift

Benign

0.82

.;T;T;.;.;T;.;.;.;.;.;.;.;.

Sift4G

Benign

0.65

T;T;T;T;T;T;T;T;T;T;T;T;T;T

Polyphen

0.0030

.;B;B;.;B;B;.;.;.;.;.;B;.;.

Vest4

0.32, 0.32, 0.32, 0.25, 0.39

MutPred

0.54

Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);Gain of disorder (P = 0.0694);

MVP

0.48

MPC

0.14

ClinPred

0.12

GERP RS

4.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.088

gMVP

0.26

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

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