Genetic Variant PPP1CB:c.-108G>A (chr2-28751800-G-A) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_ModerateBP6_ModerateBS2

The NM_206876.2(PPP1CB):c.-108G>A variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000355 in 441,740 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 30)

Exomes 𝑓: 0.00048 ( 1 hom. )

Consequence

PPP1CB
NM_206876.2 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Benign criteria provided, single submitter B:1

Conservation

PhyloP100: 2.19

Publications

0 publications found

Variant links:

Genes affected

PPP1CB (HGNC:9282): (protein phosphatase 1 catalytic subunit beta) The protein encoded by this gene is one of the three catalytic subunits of protein phosphatase 1 (PP1). PP1 is a serine/threonine specific protein phosphatase known to be involved in the regulation of a variety of cellular processes, such as cell division, glycogen metabolism, muscle contractility, protein synthesis, and HIV-1 viral transcription. Mouse studies suggest that PP1 functions as a suppressor of learning and memory. Two alternatively spliced transcript variants encoding distinct isoforms have been observed. [provided by RefSeq, Jul 2008]

PPP1CB links:

PPP1CB-DT (HGNC:55829): (PPP1CB divergent transcript)

PPP1CB-DT links:

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ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.2).

BP6

Variant 2-28751800-G-A is Benign according to our data. Variant chr2-28751800-G-A is described in ClinVar as [Benign]. Clinvar id is 1265254.Status of the report is criteria_provided_single_submitter, 1 stars.

BS2

High AC in GnomAd4 at 19 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PPP1CB	NM_002709.3 link	c.-325G>A		upstream_gene_variant		ENST00000395366.3	NP_002700.1	P62140V9HW04

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PPP1CB	ENST00000395366.3 link	c.-325G>A		upstream_gene_variant		1	NM_002709.3	ENSP00000378769.2		P62140

Frequencies

GnomAD3 genomes

AF:

0.000125

AC:

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000289

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000827

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000368

AC:

AN:

59804

AF XY:

0.000418

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000907

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000534

Gnomad NFE exome

AF:

0.0000310

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000477

AC:

138

AN:

289428

Hom.:

Cov.:

AF XY:

0.000718

AC XY:

114

AN XY:

158666

show subpopulations

African (AFR)

AF:

0.000346

AC:

AN:

5788

American (AMR)

AF:

0.000628

AC:

AN:

12730

Ashkenazi Jewish (ASJ)

AF:

0.000129

AC:

AN:

7774

East Asian (EAS)

AF:

0.00

AC:

AN:

13098

South Asian (SAS)

AF:

0.00263

AC:

115

AN:

43662

European-Finnish (FIN)

AF:

0.0000625

AC:

AN:

16010

Middle Eastern (MID)

AF:

0.000817

AC:

AN:

1224

European-Non Finnish (NFE)

AF:

0.0000519

AC:

AN:

173528

Other (OTH)

AF:

0.0000640

AC:

AN:

15614

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.530

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000125

AC:

AN:

152312

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74486

show subpopulations

African (AFR)

AF:

0.000289

AC:

AN:

41580

American (AMR)

AF:

0.0000653

AC:

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.000828

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68012

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.491

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.000136

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Aug 04, 2020

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.20

CADD

Benign

(source)

DANN

Uncertain

0.99

PhyloP100

2.2

PromoterAI

-0.16

Neutral

(source)

Mutation Taster

=299/1

polymorphism

(source)

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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2-28751800-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over