rs746333787

Variant names:

• chr1-84144497-G-A
• rs746333787
• NM_182948.4:c.136G>A

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4 BS2

The NM_182948.4(PRKACB):​c.136G>A​(p.Glu46Lys) variant causes a missense change. The variant allele was found at a frequency of 0.0000096 in 1,458,288 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000096 (0 hom.)
• Consequence: PRKACB NM_182948.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.95

Genes affected

PRKACB (HGNC:9381): (protein kinase cAMP-activated catalytic subunit beta) The protein encoded by this gene is a member of the serine/threonine protein kinase family. The encoded protein is a catalytic subunit of cAMP (cyclic AMP)-dependent protein kinase, which mediates signalling though cAMP. cAMP signaling is important to a number of processes, including cell proliferaton and differentiation. Multiple alternatively spliced transcript variants encoding distinct isoforms have been observed. [provided by RefSeq, Jul 2014]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.38854235).
• BS2: High AC in GnomAdExome4 at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PRKACB	NM_182948.4	c.136G>A	p.Glu46Lys	missense_variant	Exon 1 of 10	ENST00000370685.7	NP_891993.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PRKACB	ENST00000370685.7	c.136G>A	p.Glu46Lys	missense_variant	Exon 1 of 10	1	NM_182948.4	ENSP00000359719.3
PRKACB	ENST00000370689.6	c.47-34680G>A		intron_variant	Intron 1 of 9	1		ENSP00000359723.2
PRKACB	ENST00000370688.7	c.47-34680G>A		intron_variant	Intron 1 of 8	1		ENSP00000359722.3
PRKACB	ENST00000470673.5	n.176G>A		non_coding_transcript_exon_variant	Exon 1 of 7	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000122 AC: 3 AN: 246724 Hom.: 0 AF XY: 0.00000749 AC XY: 1 AN XY: 133588

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: 0.0000268

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000960 AC: 14 AN: 1458288 Hom.: 0 Cov.: 30 AF XY: 0.0000124 AC XY: 9 AN XY: 725550

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: 0.0000117

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

ExAC AF: 0.0000165 AC: 2

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Dec 12, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.136G>A (p.E46K) alteration is located in exon 1 (coding exon 1) of the PRKACB gene. This alteration results from a G to A substitution at nucleotide position 136, causing the glutamic acid (E) at amino acid position 46 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.034	T
BayesDel_noAF	Benign	-0.22
CADD	Benign	21
DANN	Uncertain	1.0
Eigen	Benign	-0.021
Eigen_PC	Benign	0.094
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.80	T
M_CAP	Benign	0.027	D
MetaRNN	Benign	0.39	T
MetaSVM	Benign	-0.90	T
PrimateAI	Uncertain	0.60	T
PROVEAN	Benign	0.18	N
REVEL	Benign	0.23
Sift	Uncertain	0.022	D
Sift4G	Benign	0.37	T
Polyphen		0.73	P
Vest4		0.58
MutPred		0.29		Gain of ubiquitination at E46 (P = 0.0045);
MVP		0.70
MPC		0.98
ClinPred		0.89	D
GERP RS		4.7
gMVP		0.53

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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

Other links and lift over

dbSNP: rs746333787; hg19: chr1-84610180;