VCV000138238.26 - ClinVar

NM_015506.3(MMACHC):c.178G>C (p.Asp60His)

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.

(11)

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.

Benign

criteria provided, multiple submitters, no conflicts

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_015506.3(MMACHC):c.178G>C (p.Asp60His)

Variation ID: 138238 Accession: VCV000138238.26

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 1p34.1 1: 45507452 (GRCh38) [ NCBI UCSC ] 1: 45973124 (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 8, 2016	Sep 29, 2024	Jan 31, 2024

HGVS

Nucleotide	Protein	Molecular consequence
NM_015506.3:c.178G>C MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_056321.2:p.Asp60His	missense
NM_001330540.2:c.7G>C	NP_001317469.1:p.Asp3His	missense
NC_000001.11:g.45507452G>C
NC_000001.10:g.45973124G>C
NG_013378.1:g.12269G>C

... more HGVS ... less HGVS

Protein change

D60H, D3H

Other names

p.D60H:GAC>CAC

Canonical SPDI

NC_000001.11:45507451:G:C

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.

0.02536 (C)

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

The Genome Aggregation Database (gnomAD), exomes 0.00637

Exome Aggregation Consortium (ExAC) 0.00765

1000 Genomes Project 0.02536

NHLBI Exome Sequencing Project (ESP) Exome Variant Server 0.02774

1000 Genomes Project 30x 0.02811

The Genome Aggregation Database (gnomAD) 0.02835

Trans-Omics for Precision Medicine (TOPMed) 0.02919

Links

ClinGen: CA292117 dbSNP: rs6662272 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.
MMACHC		-	-	GRCh38 GRCh37	527	620

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.
not specified	Benign (5)	criteria provided, multiple submitters, no conflicts	Dec 7, 2017	RCV000126792.18
not provided	Benign (2)	criteria provided, multiple submitters, no conflicts	Jun 4, 2015	RCV000224616.5
Disorders of Intracellular Cobalamin Metabolism	Benign (1)	criteria provided, single submitter	Jan 13, 2018	RCV000362925.5
Cobalamin C disease	Benign (3)	criteria provided, multiple submitters, no conflicts	Jan 31, 2024	RCV001080566.9

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.
Benign (Jun 04, 2015)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	not provided Affected status: not provided Allele origin: germline	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics Accession: SCV000280733.1 First in ClinVar: Jun 08, 2016 Last updated: Jun 08, 2016
Benign (Apr 15, 2016)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	NOT SPECIFIED Affected status: unknown Allele origin: germline	PreventionGenetics, part of Exact Sciences Accession: SCV000312559.1 First in ClinVar: Oct 02, 2016 Last updated: Oct 02, 2016
Benign (Aug 06, 2013)	criteria provided, single submitter (GeneDx Variant Classification (06012015)) Method: clinical testing	not specified Affected status: yes Allele origin: germline	GeneDx Accession: SCV000170315.11 First in ClinVar: Jun 23, 2014 Last updated: Oct 02, 2016	Comment: This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at … (more) This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. (less)
Benign (Dec 07, 2017)	criteria provided, single submitter (LabCorp Variant Classification Summary - May 2015) Method: clinical testing	not specified Affected status: unknown Allele origin: germline	Women's Health and Genetics/Laboratory Corporation of America, LabCorp Accession: SCV000919669.1 First in ClinVar: Jun 02, 2019 Last updated: Jun 02, 2019	Comment: Variant summary: The MMACHC c.178G>C (p.Asp60His) variant involves the alteration of a conserved nucleotide. 3/3 in silico tools predict a damaging outcome for this variant … (more) Variant summary: The MMACHC c.178G>C (p.Asp60His) variant involves the alteration of a conserved nucleotide. 3/3 in silico tools predict a damaging outcome for this variant (SNPsandGO and MutationTaster not captured due to low reliability index). This variant was found in 2372/277122 control chromosomes, predominantly observed in the African subpopulation at a frequency of 0.091049 (2185/23998, including 96 homozygotes). This frequency is about 30 times the estimated maximal expected allele frequency of a pathogenic MMACHC variant (0.0030542), suggesting this is likely a benign polymorphism found primarily in the populations of African origin. In addition, multiple clinical diagnostic laboratories/reputable databases classified this variant as benign. The variant of interest has not, to our knowledge, been reported in affected individuals via publications nor evaluated for functional impact by in vivo/vitro studies. Taken together, this variant is classified as benign. (less)
Benign (Jan 13, 2018)	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019) Method: clinical testing	Disorders of Intracellular Cobalamin Metabolism Affected status: unknown Allele origin: germline	Illumina Laboratory Services, Illumina Accession: SCV000357917.3 First in ClinVar: Dec 06, 2016 Last updated: May 31, 2020	Comment: This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated … (more) This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. (less)
Benign (Apr 11, 2023)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Cobalamin C disease Affected status: no Allele origin: germline	Genome-Nilou Lab Accession: SCV004178134.1 First in ClinVar: Dec 24, 2023 Last updated: Dec 24, 2023
Benign (Jan 31, 2024)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	Cobalamin C disease Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV000640282.8 First in ClinVar: Dec 26, 2017 Last updated: Feb 20, 2024
Benign (Nov 08, 2023)	criteria provided, single submitter (ARUP Molecular Germline Variant Investigation Process 2024) Method: clinical testing	Cobalamin C disease Affected status: unknown Allele origin: germline	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories Accession: SCV000604241.2 First in ClinVar: Oct 02, 2016 Last updated: Feb 20, 2024
Benign (-)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: not provided	not provided (Autosomal recessive inheritance) Affected status: yes Allele origin: germline	Breakthrough Genomics, Breakthrough Genomics Accession: SCV005284440.1 First in ClinVar: Sep 29, 2024 Last updated: Sep 29, 2024
Benign (-)	no assertion criteria provided Method: clinical testing	not specified Affected status: yes Allele origin: germline	Clinical Genetics, Academic Medical Center Additional submitter: Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen Study: VKGL Data-share Consensus Accession: SCV002034487.1 First in ClinVar: Dec 18, 2021 Last updated: Dec 18, 2021
Benign (-)	no assertion criteria provided Method: clinical testing	not specified Affected status: yes Allele origin: germline	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC) Additional submitter: Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen Study: VKGL Data-share Consensus Accession: SCV002036831.1 First in ClinVar: Dec 18, 2021 Last updated: Dec 18, 2021
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Comment:

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.

Comment:

Variant summary: The MMACHC c.178G>C (p.Asp60His) variant involves the alteration of a conserved nucleotide. 3/3 in silico tools predict a damaging outcome for this variant (SNPsandGO and MutationTaster not captured due to low reliability index). This variant was found in 2372/277122 control chromosomes, predominantly observed in the African subpopulation at a frequency of 0.091049 (2185/23998, including 96 homozygotes). This frequency is about 30 times the estimated maximal expected allele frequency of a pathogenic MMACHC variant (0.0030542), suggesting this is likely a benign polymorphism found primarily in the populations of African origin. In addition, multiple clinical diagnostic laboratories/reputable databases classified this variant as benign. The variant of interest has not, to our knowledge, been reported in affected individuals via publications nor evaluated for functional impact by in vivo/vitro studies. Taken together, this variant is classified as benign.

Comment:

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease.

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 rs6662272 ...

These citations are identified by LitVar using the rs number, so they may include citations for more than one variant at this location. Please review the LitVar results carefully for your variant of interest.

Record last updated Sep 29, 2024

ClinVar Genomic variation as it relates to human health

NM_015506.3(MMACHC):c.178G>C (p.Asp60His)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for rs6662272 ...