Genetic Variant PRKAR1B:c.892-18G>A (chr7-551488-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001164760.2(PRKAR1B):c.892-18G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000716 in 1,396,890 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0 ( 0 hom., cov: 33)

Exomes 𝑓: 7.2e-7 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

PRKAR1B
NM_001164760.2 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.208

Publications

6 publications found

Variant links:

Genes affected

PRKAR1B (HGNC:9390): (protein kinase cAMP-dependent type I regulatory subunit beta) The protein encoded by this gene is a regulatory subunit of cyclic AMP-dependent protein kinase A (PKA), which is involved in the signaling pathway of the second messenger cAMP. Two regulatory and two catalytic subunits form the PKA holoenzyme, disbands after cAMP binding. The holoenzyme is involved in many cellular events, including ion transport, metabolism, and transcription. Several transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Aug 2015]

PRKAR1B Gene-Disease associations (from GenCC):

Marbach-Schaaf neurodevelopmental syndrome
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
PRKAR1B-related neurodegenerative dementia with intermediate filaments
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

PRKAR1B links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.8).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PRKAR1B	NM_001164760.2 link	c.892-18G>A		intron_variant	Intron 9 of 10	ENST00000537384.6	NP_001158232.1	P31321

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PRKAR1B	ENST00000537384.6 link	c.892-18G>A		intron_variant	Intron 9 of 10	5	NM_001164760.2	ENSP00000440449.1		P31321

Frequencies

GnomAD3 genomes

AF:

0.00

AC:

AN:

151680

Hom.:

Cov.:

Gnomad AFR

AF:

0.00

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

GnomAD4 exome

AF:

7.16e-7

AC:

AN:

1396890

Hom.:

Cov.:

AF XY:

0.00000145

AC XY:

AN XY:

689122

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31934

American (AMR)

AF:

0.00

AC:

AN:

35694

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25124

East Asian (EAS)

AF:

0.00

AC:

AN:

36032

South Asian (SAS)

AF:

0.00

AC:

AN:

79352

European-Finnish (FIN)

AF:

0.00

AC:

AN:

47844

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4928

European-Non Finnish (NFE)

AF:

9.28e-7

AC:

AN:

1078116

Other (OTH)

AF:

0.00

AC:

AN:

57866

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

151680

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74066

African (AFR)

AF:

0.00

AC:

AN:

41146

American (AMR)

AF:

0.00

AC:

AN:

15258

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5162

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10600

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67898

Other (OTH)

AF:

0.00

AC:

AN:

2090

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.80

CADD

Benign

1.5

(source)

DANN

Benign

0.46

PhyloP100

-0.21

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

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

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7-551488-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over