VCV002584981.1 - ClinVar

NM_001135629.3(PPP1R21):c.763del (p.Ile255fs)

Germline

Classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

(1)

Stars represent the aggregate review status, or the level of review supporting the aggregate germline classification for this VCV record. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status. The number of submissions which contribute to this review status is shown in parentheses.

Likely pathogenic

criteria provided, single submitter

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_001135629.3(PPP1R21):c.763del (p.Ile255fs)

Variation ID: 2584981 Accession: VCV002584981.1

Type and length

Deletion, 1 bp

Location

Cytogenetic: 2p16.3 2: 48465508 (GRCh38) [ NCBI UCSC ] 2: 48692647 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Oct 28, 2023	Oct 28, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NM_001135629.3:c.763del MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_001129101.1:p.Ile255fs	frameshift
NM_001193475.2:c.763del	NP_001180404.1:p.Ile255fs	frameshift
NM_152994.5:c.763del	NP_694539.1:p.Ile255fs	frameshift
NR_024188.3:n.990del		non-coding transcript variant
NC_000002.12:g.48465508del
NC_000002.11:g.48692647del

... more HGVS ... less HGVS

Protein change

I255fs

Other names

Canonical SPDI

NC_000002.12:48465507:A:

Functional consequence Help The effect of the variant on RNA or protein function, based on experimental evidence from submitters.

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

Links

VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
PPP1R21		-	-	GRCh38 GRCh37	122	142

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
Neurodevelopmental disorder with hypotonia, facial dysmorphism, and brain abnormalities	Likely pathogenic (1)	criteria provided, single submitter	-	RCV003340881.2

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	More information Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Likely pathogenic (-)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Neurodevelopmental disorder with hypotonia, facial dysmorphism, and brain abnormalities (Autosomal recessive inheritance) Affected status: yes Allele origin: germline	Neuberg Centre For Genomic Medicine, NCGM Accession: SCV004047689.1 First in ClinVar: Oct 28, 2023 Last updated: Oct 28, 2023	Comment: The c.763del (p.Ile255LeufsTer13) frameshift variant in PPP1R21 gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. … (more) The c.763del (p.Ile255LeufsTer13) frameshift variant in PPP1R21 gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. The p.Ile255LeufsTer13 variant is novel (not in any individuals) in gnomAD Exomes and is novel (not in any individuals) in 1000 Genomes. This variant causes a frameshift starting with codon Isoleucine 255, changes this amino acid to Leucine residue, and creates a premature Stop codon at position 13 of the new reading frame, denoted p.Ile255LeufsTer13. This variant is predicted to cause loss of normal protein function through protein truncation. Loss of function variants have been previously reported to be disease causing. For these reasons, this variant has been classified as Likely Pathogenic. (less) Clinical Features: Abnormal brain morphology (present) , Leukodystrophy (present) , EEG abnormality (present) , Epileptic encephalopathy (present) , Brain atrophy (present)

Comment:

The c.763del (p.Ile255LeufsTer13) frameshift variant in PPP1R21 gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. The p.Ile255LeufsTer13 variant is novel (not in any individuals) in gnomAD Exomes and is novel (not in any individuals) in 1000 Genomes. This variant causes a frameshift starting with codon Isoleucine 255, changes this amino acid to Leucine residue, and creates a premature Stop codon at position 13 of the new reading frame, denoted p.Ile255LeufsTer13. This variant is predicted to cause loss of normal protein function through protein truncation. Loss of function variants have been previously reported to be disease causing. For these reasons, this variant has been classified as Likely Pathogenic.

Germline Functional Evidence

There is no functional evidence in ClinVar for this variation. If you have generated functional data for this variation, please consider submitting that data to ClinVar.

Comment:

Citations for germline classification of this variant

There are no citations for germline classification of this variant in ClinVar. If you know of citations for this variation, please consider submitting that information to ClinVar.

Text-mined citations for this variant ...

Record last updated Apr 06, 2024

ClinVar Genomic variation as it relates to human health

NM_001135629.3(PPP1R21):c.763del (p.Ile255fs)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...