rs74863634

Variant names:

• chr17-68522782-G-A
• rs74863634
• NM_002734.5:c.204G>A

Variant summary

Our verdict is Benign. The variant received -18 ACMG points: 0P and 18B. BP4_Moderate BP6_Very_Strong BS1 BS2

The NM_002734.5(PRKAR1A):​c.204G>A​(p.Leu68Leu) variant causes a synonymous change. The variant allele was found at a frequency of 0.000761 in 1,614,112 control chromosomes in the GnomAD database, including 7 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. L68L) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.0038 (3 hom., cov: 32)
  • Exomes 𝑓: 0.00044 (4 hom.)
• Consequence: PRKAR1A NM_002734.5 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:10
• Conservation: PhyloP100: 4.04
• Publications: 5 publications found

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 Gene-Disease associations (from GenCC):

• Acrodysostosis 1 with or without hormone resistance

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• acrodysostosis with multiple hormone resistance

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Illumina, Orphanet
• Carney complex, type 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• pigmented nodular adrenocortical disease, primary, 1

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Genomics England PanelApp, Ambry Genetics
• acrodysostosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Carney complex

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial atrial myxoma

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• primary pigmented nodular adrenocortical disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000267009 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -18 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.23).
• BP6: Variant 17-68522782-G-A is Benign according to our data. Variant chr17-68522782-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 41044.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00382 (581/152286) while in subpopulation AFR AF = 0.0127 (529/41546). AF 95% confidence interval is 0.0118. There are 3 homozygotes in GnomAd4. There are 288 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High AC in GnomAd4 at 581 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002734.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRKAR1A	NM_002734.5	MANE Select	c.204G>A	p.Leu68Leu	synonymous	Exon 3 of 11	NP_002725.1
	PRKAR1A	NM_001276289.2		c.204G>A	p.Leu68Leu	synonymous	Exon 4 of 12	NP_001263218.1
	PRKAR1A	NM_001278433.2		c.204G>A	p.Leu68Leu	synonymous	Exon 3 of 11	NP_001265362.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRKAR1A	ENST00000589228.6	TSL:1 MANE Select	c.204G>A	p.Leu68Leu	synonymous	Exon 3 of 11	ENSP00000464977.2
	PRKAR1A	ENST00000358598.6	TSL:1	c.204G>A	p.Leu68Leu	synonymous	Exon 3 of 11	ENSP00000351410.1
	PRKAR1A	ENST00000536854.6	TSL:1	c.204G>A	p.Leu68Leu	synonymous	Exon 4 of 12	ENSP00000445625.1

Frequencies

GnomAD3 genomes AF: 0.00379 AC: 577 AN: 152168 Hom.: 3 Cov.: 32

Gnomad AFR AF: 0.0127

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00242

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.0000882

Gnomad OTH AF: 0.00383

GnomAD2 exomes AF: 0.00119 AC: 298 AN: 251298 AF XY: 0.000972

Gnomad AFR exome AF: 0.0129

Gnomad AMR exome AF: 0.00171

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000792

Gnomad OTH exome AF: 0.00310

GnomAD4 exome AF: 0.000443 AC: 647 AN: 1461826 Hom.: 4 Cov.: 31 AF XY: 0.000381 AC XY: 277 AN XY: 727208

African (AFR) AF: 0.0139 AC: 467 AN: 33480

American (AMR) AF: 0.00188 AC: 84 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.0000696 AC: 6 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53400

Middle Eastern (MID) AF: 0.00139 AC: 8 AN: 5768

European-Non Finnish (NFE) AF: 0.0000189 AC: 21 AN: 1111978

Other (OTH) AF: 0.00101 AC: 61 AN: 60390

GnomAD4 genome AF: 0.00382 AC: 581 AN: 152286 Hom.: 3 Cov.: 32 AF XY: 0.00387 AC XY: 288 AN XY: 74462

African (AFR) AF: 0.0127 AC: 529 AN: 41546

American (AMR) AF: 0.00242 AC: 37 AN: 15304

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5182

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10604

Middle Eastern (MID) AF: 0.00340 AC: 1 AN: 294

European-Non Finnish (NFE) AF: 0.0000882 AC: 6 AN: 68034

Other (OTH) AF: 0.00379 AC: 8 AN: 2110

Alfa AF: 0.00174 Hom.: 3

Bravo AF: 0.00450

Asia WGS AF: 0.000577 AC: 2 AN: 3478

EpiCase AF: 0.000273

EpiControl AF: 0.000296

ClinVar

ClinVar submissions as Germline

Significance: Benign/Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	3	not provided (3)
-	-	2	Carney complex, type 1 (2)
-	-	1	Acrodysostosis 1 with or without hormone resistance (1)
-	-	1	Familial atrial myxoma (1)
-	-	1	Hereditary cancer-predisposing syndrome (1)
-	-	1	not specified (1)
-	-	1	Pigmented nodular adrenocortical disease, primary, 1;C2607929:Carney complex, type 1;C2931787:Familial atrial myxoma;C3276228:Acrodysostosis 1 with or without hormone resistance (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_noAF	Benign	-0.23
CADD	Benign	16
DANN	Benign	0.77
PhyloP100		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=98/2	polymorphism

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

Other links and lift over

dbSNP: rs74863634; hg19: chr17-66518923;