VCV000328274.35 - ClinVar

NM_000528.4(MAN2B1):c.1068C>G (p.Pro356=)

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/Likely 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_000528.4(MAN2B1):c.1068C>G (p.Pro356=)

Variation ID: 328274 Accession: VCV000328274.35

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 19p13.13 19: 12658469 (GRCh38) [ NCBI UCSC ] 19: 12769283 (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	Dec 6, 2016	Oct 20, 2024	Feb 1, 2024

HGVS

Nucleotide	Protein	Molecular consequence
NM_000528.4:c.1068C>G MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_000519.2:p.Pro356=	synonymous
NM_001173498.2:c.1065C>G	NP_001166969.1:p.Pro355=	synonymous
NC_000019.10:g.12658469G>C
NC_000019.9:g.12769283G>C
NG_008318.1:g.13309C>G

... more HGVS ... less HGVS

Protein change

Other names

Canonical SPDI

NC_000019.10:12658468: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.

0.00180 (C)

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

1000 Genomes Project 0.00180

The Genome Aggregation Database (gnomAD) 0.00217

1000 Genomes Project 30x 0.00219

NHLBI Exome Sequencing Project (ESP) Exome Variant Server 0.00323

Trans-Omics for Precision Medicine (TOPMed) 0.00326

Links

ClinGen: CA9226605 dbSNP: rs117880912 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.
MAN2B1		-	-	GRCh38 GRCh37	1563	1739

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.
Deficiency of alpha-mannosidase	Benign/Likely benign (4)	criteria provided, multiple submitters, no conflicts	Feb 1, 2024	RCV000402847.16
not provided	Benign/Likely benign (5)	criteria provided, multiple submitters, no conflicts	Feb 1, 2024	RCV000675483.20
not specified	Benign (2)	criteria provided, single submitter	Jun 15, 2018	RCV000780389.3

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 15, 2018)	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: SCV000917599.1 First in ClinVar: Jun 02, 2019 Last updated: Jun 02, 2019	Comment: Variant summary: MAN2B1 c.1068C>G alters a non-conserved nucleotide resulting in a synonymous change. 5/5 computational tools predict no significant impact on normal splicing. However, these … (more) Variant summary: MAN2B1 c.1068C>G alters a non-conserved nucleotide resulting in a synonymous change. 5/5 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.0035 in 277160 control chromosomes in the gnomAD database, including 5 homozygotes. The observed variant frequency is approximately 2-fold higher than the estimated maximal expected allele frequency for a pathogenic variant in MAN2B1 causing Alpha-Mannosidosis phenotype (0.0016), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.1068C>G in individuals affected with Alpha-Mannosidosis and no experimental evidence demonstrating its impact on protein function have been reported. A ClinVar submission from a clinical diagnostic laboratory (evaluation after 2014) and another clinical diagnostic laboratory (EGL) cite the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as benign. (less)
Likely benign (Jan 13, 2018)	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019) Method: clinical testing	Deficiency of alpha-mannosidase Affected status: unknown Allele origin: germline	Illumina Laboratory Services, Illumina Accession: SCV000410800.3 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 likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. (less)
Benign (Jun 10, 2021)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Deficiency of alpha-mannosidase Affected status: no Allele origin: germline	Genome-Nilou Lab Accession: SCV001737301.1 First in ClinVar: Jun 19, 2021 Last updated: Jun 19, 2021	Sex: mixed
Benign (Feb 01, 2024)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	Deficiency of alpha-mannosidase Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV001102341.6 First in ClinVar: Dec 17, 2019 Last updated: Feb 20, 2024
Benign (Aug 27, 2019)	criteria provided, single submitter (GeneDx Variant Classification Process June 2021) Method: clinical testing	Not Provided Affected status: yes Allele origin: germline	GeneDx Accession: SCV001896084.1 First in ClinVar: Sep 24, 2021 Last updated: Sep 24, 2021
Likely 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: SCV005209487.1 First in ClinVar: Sep 29, 2024 Last updated: Sep 29, 2024
Likely benign (Feb 01, 2024)	criteria provided, single submitter (CeGaT Center For Human Genetics Tuebingen Variant Classification Criteria Version 2) Method: clinical testing	not provided Affected status: yes Allele origin: germline	CeGaT Center for Human Genetics Tuebingen Accession: SCV004137898.10 First in ClinVar: Nov 20, 2023 Last updated: Oct 20, 2024	Comment: MAN2B1: BP4, BP7, BS2 Number of individuals with the variant: 7
Likely benign (Dec 16, 2015)	no assertion criteria provided Method: clinical testing	not provided Affected status: unknown Allele origin: unknown	Mayo Clinic Laboratories, Mayo Clinic Accession: SCV000801173.1 First in ClinVar: Aug 05, 2018 Last updated: Aug 05, 2018
Benign (Sep 16, 2020)	no assertion criteria provided Method: clinical testing	Alpha-mannosidosis Affected status: unknown Allele origin: germline	Natera, Inc. Accession: SCV001454356.1 First in ClinVar: Jan 02, 2021 Last updated: Jan 02, 2021
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: SCV001925822.1 First in ClinVar: Sep 24, 2021 Last updated: Sep 24, 2021
Likely benign (-)	no assertion criteria provided Method: clinical testing	not provided Affected status: yes Allele origin: germline	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center Additional submitter: Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen Study: VKGL Data-share Consensus Accession: SCV001964384.1 First in ClinVar: Oct 07, 2021 Last updated: Oct 07, 2021
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Comment:

Variant summary: MAN2B1 c.1068C>G alters a non-conserved nucleotide resulting in a synonymous change. 5/5 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.0035 in 277160 control chromosomes in the gnomAD database, including 5 homozygotes. The observed variant frequency is approximately 2-fold higher than the estimated maximal expected allele frequency for a pathogenic variant in MAN2B1 causing Alpha-Mannosidosis phenotype (0.0016), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.1068C>G in individuals affected with Alpha-Mannosidosis and no experimental evidence demonstrating its impact on protein function have been reported. A ClinVar submission from a clinical diagnostic laboratory (evaluation after 2014) and another clinical diagnostic laboratory (EGL) cite the variant as uncertain significance. Based on the evidence outlined above, the variant was 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 likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely 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 rs117880912 ...

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 Oct 20, 2024

ClinVar Genomic variation as it relates to human health

NM_000528.4(MAN2B1):c.1068C>G (p.Pro356=)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for rs117880912 ...