NM_181675.4:c.-262_-261insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC

Variant names:

• chr5-146878727-A-AGCTGCTGCTGCTGCTGCTGCTGCTGCTGCTGCTGCTGCTGCTGCTGCTGCTGCTGCTGCT
• rs10591869
• NM_181675.4:c.-262_-261insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_181675.4(PPP2R2B):​c.-262_-261insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 0)
  • Exomes 𝑓: 0.000011 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PPP2R2B NM_181675.4 5_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.19
• Publications: 4 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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

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.-262_-261insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC		5_prime_UTR	Exon 1 of 10	NP_858061.3	Q00005-1
	PPP2R2B	NM_001428277.1		c.-657_-656insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC		5_prime_UTR	Exon 1 of 9	NP_001415206.1	Q00005-1
	PPP2R2B	NM_001428279.1		c.-152_-151insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC		5_prime_UTR	Exon 1 of 10	NP_001415208.1	Q00005-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PPP2R2B	ENST00000394411.9	TSL:2 MANE Select	c.-262_-261insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC		5_prime_UTR	Exon 1 of 10	ENSP00000377933.3	Q00005-1
	PPP2R2B	ENST00000453001.5	TSL:1	c.-775_-774insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC		5_prime_UTR	Exon 1 of 10	ENSP00000398779.2	Q00005-6
	PPP2R2B	ENST00000394414.5	TSL:1	c.75-533_75-532insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC		intron	N/A	ENSP00000377936.1	Q00005-5

Frequencies

GnomAD3 genomes AF: 0.00000665 AC: 1 AN: 150486 Hom.: 0 Cov.: 0

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: 0.0000148

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.0000113 AC: 13 AN: 1147000 Hom.: 0 Cov.: 27 AF XY: 0.0000142 AC XY: 8 AN XY: 562108

African (AFR) AF: 0.00 AC: 0 AN: 23470

American (AMR) AF: 0.00 AC: 0 AN: 27148

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 15244

East Asian (EAS) AF: 0.000210 AC: 5 AN: 23798

South Asian (SAS) AF: 0.0000689 AC: 5 AN: 72538

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 15564

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2848

European-Non Finnish (NFE) AF: 0.00000325 AC: 3 AN: 923476

Other (OTH) AF: 0.00 AC: 0 AN: 42914

GnomAD4 genome AF: 0.00000665 AC: 1 AN: 150486 Hom.: 0 Cov.: 0 AF XY: 0.0000136 AC XY: 1 AN XY: 73344

African (AFR) AF: 0.00 AC: 0 AN: 40882

American (AMR) AF: 0.00 AC: 0 AN: 15156

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3460

East Asian (EAS) AF: 0.00 AC: 0 AN: 4922

South Asian (SAS) AF: 0.00 AC: 0 AN: 4704

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10442

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 312

European-Non Finnish (NFE) AF: 0.0000148 AC: 1 AN: 67642

Other (OTH) AF: 0.00 AC: 0 AN: 2064

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		3.2
Mutation Taster		=100/0	polymorphism

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs10591869; hg19: chr5-146258290;