NM_181675.4:c.1154G>A

Variant names:

• chr5-146590125-C-T
• rs772255940
• NM_181675.4:c.1154G>A

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2

The NM_181675.4(PPP2R2B):​c.1154G>A​(p.Arg385Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000116 in 1,461,882 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000012 (0 hom.)
• Consequence: PPP2R2B NM_181675.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.57
• Publications: 3 publications found

Genes affected

PPP2R2B (HGNC:9305): (protein phosphatase 2 regulatory subunit Bbeta) The product of this gene belongs to the phosphatase 2 regulatory subunit B family. Protein phosphatase 2 is one of the four major Ser/Thr phosphatases, and it is implicated in the negative control of cell growth and division. It consists of a common heteromeric core enzyme, which is composed of a catalytic subunit and a constant regulatory subunit, that associates with a variety of regulatory subunits. The B regulatory subunit might modulate substrate selectivity and catalytic activity. This gene encodes a beta isoform of the regulatory subunit B55 subfamily. Defects in this gene cause autosomal dominant spinocerebellar ataxia 12 (SCA12), a disease caused by degeneration of the cerebellum, sometimes involving the brainstem and spinal cord, and in resulting in poor coordination of speech and body movements. Multiple alternatively spliced variants, which encode different isoforms, have been identified for this gene. The 5' UTR of some of these variants includes a CAG trinucleotide repeat sequence (7-28 copies) that can be expanded to 55-78 copies in cases of SCA12. [provided by RefSeq, Jul 2016]

PPP2R2B Gene-Disease associations (from GenCC):

• spinocerebellar ataxia type 12

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet

ENSG00000304935 (HGNC:):

ENSG00000250407 (HGNC:58421):

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BS2: High AC in GnomAdExome4 at 17 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_181675.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PPP2R2B	NM_181675.4	MANE Select	c.1154G>A	p.Arg385Gln	missense	Exon 10 of 10	NP_858061.3	Q00005-1
	PPP2R2B	NM_181674.3		c.1352G>A	p.Arg451Gln	missense	Exon 10 of 10	NP_858060.2	Q00005-5
	PPP2R2B	NM_001271900.2		c.1328G>A	p.Arg443Gln	missense	Exon 11 of 11	NP_001258829.1	Q00005-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PPP2R2B	ENST00000394411.9	TSL:2 MANE Select	c.1154G>A	p.Arg385Gln	missense	Exon 10 of 10	ENSP00000377933.3	Q00005-1
	PPP2R2B	ENST00000394414.5	TSL:1	c.1352G>A	p.Arg451Gln	missense	Exon 10 of 10	ENSP00000377936.1	Q00005-5
	PPP2R2B	ENST00000394409.7	TSL:1	c.1154G>A	p.Arg385Gln	missense	Exon 9 of 9	ENSP00000377931.4	Q00005-1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000159 AC: 4 AN: 251102 AF XY: 0.0000295

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000353

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000116 AC: 17 AN: 1461882 Hom.: 0 Cov.: 31 AF XY: 0.0000124 AC XY: 9 AN XY: 727242

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.000230 AC: 6 AN: 26134

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

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000719 AC: 8 AN: 1112006

Other (OTH) AF: 0.0000331 AC: 2 AN: 60394

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000487 Hom.: 0

Bravo AF: 0.0000113

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.40
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.22
CADD	Pathogenic	29
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.20	T
Eigen	Uncertain	0.31
Eigen_PC	Uncertain	0.47
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.045	D
MetaRNN	Uncertain	0.58	D
MetaSVM	Benign	-0.40	T
MutationAssessor	Benign	1.7	L
PhyloP100		7.6
PrimateAI	Uncertain	0.79	T
PROVEAN	Benign	-1.3	N
REVEL	Uncertain	0.29
Sift	Uncertain	0.029	D
Sift4G	Benign	0.16	T
Polyphen		0.059	B
Vest4		0.63
MutPred		0.44		Gain of sheet (P = 0.0036)
MVP		0.96
MPC		0.76
ClinPred		0.73	D
GERP RS		5.8
Varity_R		0.15
gMVP		0.54
Mutation Taster		=42/58	disease causing

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: rs772255940; hg19: chr5-145969688; COSMIC: COSV60762304; COSMIC: COSV60762304;