VCV003248147.1 - ClinVar

NC_000021.8:g.(?_37707582)_(38139606_?)del

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.

Pathogenic

criteria provided, single submitter

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NC_000021.8:g.(?_37707582)_(38139606_?)del

Variation ID: 3248147 Accession: VCV003248147.1

Type and length

Deletion, 432,025 bp

Location

Cytogenetic: 21q22.12-22.13 21: 37707582-38139606 (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	Jun 30, 2024	Jun 29, 2024	Jun 14, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NC_000021.8:g.(?_37707582)_(38139606_?)del

Protein change

Other names

Canonical SPDI

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.
CHAF1B		-	-	GRCh38 GRCh37	37	104
CLDN14		-	-	GRCh38 GRCh37	-	224
HLCS		-	-	GRCh38 GRCh37	970	1064
MORC3		-	-	GRCh38 GRCh37	46	111
SIM2		-	-	GRCh38 GRCh37	44	130

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.
Holocarboxylase synthetase deficiency	Pathogenic (1)	criteria provided, single submitter	Jun 14, 2023	RCV004579314.2

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.
Pathogenic (Jun 14, 2023)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	Holocarboxylase synthetase deficiency Affected status: unknown Allele origin: unknown	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV005068064.1 First in ClinVar: Jun 29, 2024 Last updated: Jun 29, 2024	Publications: PubMed (5) PubMed: 8817339‚ 11185745‚ 16231399‚ 17407983‚ 21874615 Comment: For these reasons, this variant has been classified as Pathogenic. This variant disrupts a region of the HLCS protein in which other variant(s) (p.Arg508Trp) have … (more) For these reasons, this variant has been classified as Pathogenic. This variant disrupts a region of the HLCS protein in which other variant(s) (p.Arg508Trp) have been determined to be pathogenic (PMID: 8817339, 11185745, 16231399, 17407983, 21874615). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. This variant has not been reported in the literature in individuals affected with HLCS-related conditions. This variant is a gross deletion of the genomic region encompassing exon(s) 8-12 of the HLCS gene, which includes the termination codon. This deletion extends beyond the assayed region for this gene and therefore may encompass additional genes. While this deletion is not anticipated to lead to nonsense mediated decay, it is expected to alter mRNA translation or result in a truncated protein product. (less)

Comment:

For these reasons, this variant has been classified as Pathogenic. This variant disrupts a region of the HLCS protein in which other variant(s) (p.Arg508Trp) have been determined to be pathogenic (PMID: 8817339, 11185745, 16231399, 17407983, 21874615). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. This variant has not been reported in the literature in individuals affected with HLCS-related conditions. This variant is a gross deletion of the genomic region encompassing exon(s) 8-12 of the HLCS gene, which includes the termination codon. This deletion extends beyond the assayed region for this gene and therefore may encompass additional genes. While this deletion is not anticipated to lead to nonsense mediated decay, it is expected to alter mRNA translation or result in a truncated protein product.

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

Title	Author	Journal	Year	Link
The first reported HLCS gene mutation causing holocarboxylase synthetase deficiency in a Vietnamese patient.	Hui J	World journal of pediatrics : WJP	2012	PMID: 21874615
Holocarboxylase synthetase deficiency: report of one case.	Chou IC	Acta paediatrica Taiwanica = Taiwan er ke yi xue hui za zhi	2006	PMID: 17407983
First prenatal molecular diagnosis in a family with holocarboxylase synthetase deficiency.	Malvagia S	Prenatal diagnosis	2005	PMID: 16231399
Haplotype analysis suggests that the two predominant mutations in Japanese patients with holocarboxylase synthetase deficiency are founder mutations.	Yang X	Journal of human genetics	2000	PMID: 11185745
Clustering of mutations in the biotin-binding region of holocarboxylase synthetase in biotin-responsive multiple carboxylase deficiency.	Dupuis L	Human molecular genetics	1996	PMID: 8817339

Text-mined citations for this variant ...

Record last updated Sep 30, 2024

ClinVar Genomic variation as it relates to human health

NC_000021.8:g.(?_37707582)_(38139606_?)del

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...