1-204409645-CTTT-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PM4_Supporting

The NM_032833.5(PPP1R15B):​c.1764_1766del​(p.Lys589del) variant causes a inframe deletion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000141 in 1,613,984 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (β˜…).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 32)
Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

PPP1R15B
NM_032833.5 inframe_deletion

Scores

Not classified

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.373
Variant links:
Genes affected
PPP1R15B (HGNC:14951): (protein phosphatase 1 regulatory subunit 15B) This gene encodes a protein phosphatase I-interacting protein that promotes the dephosphorylation of eukaryotic translation initiation factor 2A to regulate translation under conditions of cellular stress. The transcribed messenger RNA contains two upstream open reading frames (ORFs) that repress translation of the main protein coding ORF under normal conditions, while the protein coding ORF is expressed at high levels in response to stress. Continual translation of the mRNA under conditions of eukaryotic translation initiation factor 2A inactivation is thought to create a feedback loop for reactivation of the gene during recovery from stress. In addition, it has been shown that this protein plays a role in membrane traffic that is independent of translation and that it is required for exocytosis from erythroleukemia cells. Allelic variants of this gene are associated with microcephaly, short stature, and impaired glucose metabolism. [provided by RefSeq, Feb 2016]
PPP1R15B-AS1 (HGNC:55838): (PPP1R15B and PIK3C2B antisense RNA 1)

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
PM4
Nonframeshift variant in NON repetitive region in NM_032833.5. Strenght limited to Supporting due to length of the change: 1aa.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE UniProt
PPP1R15BNM_032833.5 linkuse as main transcriptc.1764_1766del p.Lys589del inframe_deletion 1/2 ENST00000367188.5
PPP1R15BXM_005245551.6 linkuse as main transcriptc.1764_1766del p.Lys589del inframe_deletion 1/3
PPP1R15BXM_047432518.1 linkuse as main transcriptc.1764_1766del p.Lys589del inframe_deletion 1/3

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Appris UniProt
PPP1R15BENST00000367188.5 linkuse as main transcriptc.1764_1766del p.Lys589del inframe_deletion 1/21 NM_032833.5 P1
PPP1R15B-AS1ENST00000443515.1 linkuse as main transcriptn.147-25691_147-25689del intron_variant, non_coding_transcript_variant 3

Frequencies

GnomAD3 genomes
AF:
0.000138
AC:
21
AN:
152100
Hom.:
0
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.0000725
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:
0.000265
Gnomad OTH
AF:
0.00
GnomAD3 exomes
AF:
0.0000557
AC:
14
AN:
251470
Hom.:
0
AF XY:
0.0000589
AC XY:
8
AN XY:
135912
show subpopulations
Gnomad AFR exome
AF:
0.0000615
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:
0.000105
Gnomad OTH exome
AF:
0.000163
GnomAD4 exome
AF:
0.000142
AC:
207
AN:
1461884
Hom.:
0
AF XY:
0.000135
AC XY:
98
AN XY:
727240
show subpopulations
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:
0.000182
Gnomad4 OTH exome
AF:
0.0000828
GnomAD4 genome
AF:
0.000138
AC:
21
AN:
152100
Hom.:
0
Cov.:
32
AF XY:
0.0000538
AC XY:
4
AN XY:
74302
show subpopulations
Gnomad4 AFR
AF:
0.0000725
Gnomad4 AMR
AF:
0.00
Gnomad4 ASJ
AF:
0.00
Gnomad4 EAS
AF:
0.00
Gnomad4 SAS
AF:
0.00
Gnomad4 FIN
AF:
0.00
Gnomad4 NFE
AF:
0.000265
Gnomad4 OTH
AF:
0.00
Alfa
AF:
0.000217
Hom.:
0
Bravo
AF:
0.0000982
EpiCase
AF:
0.0000545
EpiControl
AF:
0.000119

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

not provided Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpNov 07, 2022This variant has not been reported in the literature in individuals affected with PPP1R15B-related conditions. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. This variant is present in population databases (rs764878882, gnomAD 0.01%). This variant, c.1764_1766del, results in the deletion of 1 amino acid(s) of the PPP1R15B protein (p.Lys589del), but otherwise preserves the integrity of the reading frame. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs764878882; hg19: chr1-204378773; API