chr2-28783725-G-C

Variant names:

• chr2-28783725-G-C
• rs6547877
• NM_002709.3:c.521-182G>C

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_002709.3(PPP1CB):​c.521-182G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.567 in 151,252 control chromosomes in the GnomAD database, including 24,855 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency: Genomes: 𝑓 0.57 (24855 hom., cov: 28)
• Consequence: PPP1CB NM_002709.3 intron
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.148
• Publications: 3 publications found

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]

SPDYA (HGNC:30613): (speedy/RINGO cell cycle regulator family member A) Enables protein kinase activator activity and protein kinase binding activity. Involved in several processes, including G1/S transition of mitotic cell cycle; positive regulation of cell population proliferation; and positive regulation of protein kinase activity. Located in nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Benign. The variant received -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.0).
• BP6: Variant 2-28783725-G-C is Benign according to our data. Variant chr2-28783725-G-C is described in ClinVar as [Benign]. Clinvar id is 1289295.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.6 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PPP1CB	NM_002709.3	c.521-182G>C		intron_variant	Intron 4 of 7	ENST00000395366.3	NP_002700.1
PPP1CB	NM_206876.2	c.521-182G>C		intron_variant	Intron 5 of 8		NP_996759.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PPP1CB	ENST00000395366.3	c.521-182G>C		intron_variant	Intron 4 of 7	1	NM_002709.3	ENSP00000378769.2

Frequencies

GnomAD3 genomes AF: 0.567 AC: 85767 AN: 151138 Hom.: 24835 Cov.: 28

Gnomad AFR AF: 0.577

Gnomad AMI AF: 0.558

Gnomad AMR AF: 0.470

Gnomad ASJ AF: 0.554

Gnomad EAS AF: 0.228

Gnomad SAS AF: 0.558

Gnomad FIN AF: 0.598

Gnomad MID AF: 0.642

Gnomad NFE AF: 0.605

Gnomad OTH AF: 0.578

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.567 AC: 85819 AN: 151252 Hom.: 24855 Cov.: 28 AF XY: 0.565 AC XY: 41750 AN XY: 73858

African (AFR) AF: 0.577 AC: 23751 AN: 41178

American (AMR) AF: 0.470 AC: 7145 AN: 15208

Ashkenazi Jewish (ASJ) AF: 0.554 AC: 1917 AN: 3462

East Asian (EAS) AF: 0.229 AC: 1175 AN: 5136

South Asian (SAS) AF: 0.558 AC: 2668 AN: 4784

European-Finnish (FIN) AF: 0.598 AC: 6210 AN: 10378

Middle Eastern (MID) AF: 0.636 AC: 187 AN: 294

European-Non Finnish (NFE) AF: 0.605 AC: 41038 AN: 67794

Other (OTH) AF: 0.579 AC: 1219 AN: 2106

Alfa AF: 0.573 Hom.: 2990

Bravo AF: 0.553

Asia WGS AF: 0.427 AC: 1486 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Oct 01, 2018

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	0.34
DANN	Benign	0.41
PhyloP100		-0.15
Mutation Taster		=100/0	polymorphism (auto)

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: rs6547877; hg19: chr2-29006591;