VCV000345973.14 - ClinVar

NM_002292.4(LAMB2):c.5039C>T (p.Ala1680Val)

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.

(8)

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.

Uncertain significance

criteria provided, multiple submitters, no conflicts

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_002292.4(LAMB2):c.5039C>T (p.Ala1680Val)

Variation ID: 345973 Accession: VCV000345973.14

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 3p21.31 3: 49121745 (GRCh38) [ NCBI UCSC ] 3: 49159178 (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	Aug 18, 2024	Aug 23, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NM_002292.4:c.5039C>T MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_002283.3:p.Ala1680Val	missense
NC_000003.12:g.49121745G>A
NC_000003.11:g.49159178G>A
NG_008094.1:g.16422C>T
NG_054716.1:g.4194C>T

... more HGVS ... less HGVS

Protein change

A1680V

Other names

Canonical SPDI

NC_000003.12:49121744:G: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.

NHLBI Exome Sequencing Project (ESP) Exome Variant Server 0.00023

The Genome Aggregation Database (gnomAD) 0.00033

Trans-Omics for Precision Medicine (TOPMed) 0.00041

The Genome Aggregation Database (gnomAD), exomes 0.00047

Exome Aggregation Consortium (ExAC) 0.00049

Links

ClinGen: CA2393624 dbSNP: rs141473691 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.
LAMB2		-	-	GRCh38 GRCh37	1008	1048

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.
LAMB2-related infantile-onset nephrotic syndrome	Uncertain significance (1)	criteria provided, single submitter	Jan 12, 2018	RCV000272339.5
Pierson syndrome	Uncertain significance (1)	criteria provided, single submitter	Jan 12, 2018	RCV000321246.5
not provided	Uncertain significance (2)	criteria provided, multiple submitters, no conflicts	Dec 20, 2019	RCV001753812.3
LAMB2-related infantile-onset nephrotic syndrome Pierson syndrome	Uncertain significance (2)	criteria provided, multiple submitters, no conflicts	Nov 1, 2022	RCV000551379.9
Inborn genetic diseases	Uncertain significance (1)	criteria provided, single submitter	Jul 9, 2021	RCV002520156.2
LAMB2-related disorder	Uncertain significance (1)	criteria provided, single submitter	Aug 23, 2023	RCV003401366.4

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.
Uncertain significance (Oct 31, 2018)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Pierson syndrome LAMB2-related infantile-onset nephrotic syndrome Affected status: unknown Allele origin: unknown	Fulgent Genetics, Fulgent Genetics Accession: SCV000895594.1 First in ClinVar: Mar 31, 2019 Last updated: Mar 31, 2019	Publications: PubMed (1) PubMed: 25741868 pmc: 4544753 pmc: 4544753 DOI: 10.1038/gim.2015.30 DOI: 10.1038/gim.2015.30
Uncertain significance (Jan 12, 2018)	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019) Method: clinical testing	Pierson syndrome Affected status: unknown Allele origin: germline	Illumina Laboratory Services, Illumina Accession: SCV000445248.3 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. (less)
Uncertain significance (Jan 12, 2018)	criteria provided, single submitter (ICSL Variant Classification Criteria 13 December 2019) Method: clinical testing	LAMB2-related infantile-onset nephrotic syndrome Affected status: unknown Allele origin: germline	Illumina Laboratory Services, Illumina Accession: SCV000445247.3 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. (less)
Uncertain significance (Nov 01, 2022)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	LAMB2-related infantile-onset nephrotic syndrome Pierson syndrome Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV000651563.6 First in ClinVar: Dec 26, 2017 Last updated: Feb 07, 2023	Publications: PubMed (1) PubMed: 28492532 Comment: This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 1680 of the LAMB2 protein (p.Ala1680Val). … (more) This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 1680 of the LAMB2 protein (p.Ala1680Val). This variant is present in population databases (rs141473691, gnomAD 0.2%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with LAMB2-related conditions. ClinVar contains an entry for this variant (Variation ID: 345973). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). 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. (less)
Uncertain significance (Dec 20, 2019)	criteria provided, single submitter (GeneDx Variant Classification Process June 2021) Method: clinical testing	Not Provided Affected status: yes Allele origin: germline	GeneDx Accession: SCV001996855.2 First in ClinVar: Nov 06, 2021 Last updated: Mar 04, 2023	Comment: In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; Has not been previously published as … (more) In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge (less)
Uncertain significance (Aug 23, 2023)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	LAMB2-related condition Affected status: unknown Allele origin: germline	PreventionGenetics, part of Exact Sciences Accession: SCV004102910.1 First in ClinVar: Nov 20, 2023 Last updated: Nov 20, 2023	Comment: The LAMB2 c.5039C>T variant is predicted to result in the amino acid substitution p.Ala1680Val. To our knowledge, this variant has not been reported in the … (more) The LAMB2 c.5039C>T variant is predicted to result in the amino acid substitution p.Ala1680Val. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.19% of alleles in individuals of Ashkenazi Jewish descent in gnomAD, but at lower frequencies in other sub-populations (http://gnomad.broadinstitute.org/variant/3-49159178-G-A). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. (less)
Uncertain significance (Jul 09, 2021)	criteria provided, single submitter (Ambry Variant Classification Scheme 2023) Method: clinical testing	Inborn genetic diseases Affected status: unknown Allele origin: germline	Ambry Genetics Accession: SCV003620225.2 First in ClinVar: Feb 07, 2023 Last updated: May 01, 2024	Comment: The c.5039C>T (p.A1680V) alteration is located in exon 30 (coding exon 30) of the LAMB2 gene. This alteration results from a C to T substitution … (more) The c.5039C>T (p.A1680V) alteration is located in exon 30 (coding exon 30) of the LAMB2 gene. This alteration results from a C to T substitution at nucleotide position 5039, causing the alanine (A) at amino acid position 1680 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. (less)
Uncertain significance (-)	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: SCV005189554.1 First in ClinVar: Aug 18, 2024 Last updated: Aug 18, 2024

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.

Comment:

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 1680 of the LAMB2 protein (p.Ala1680Val). This variant is present in population databases (rs141473691, gnomAD 0.2%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with LAMB2-related conditions. ClinVar contains an entry for this variant (Variation ID: 345973). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). 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.

Comment:

The LAMB2 c.5039C>T variant is predicted to result in the amino acid substitution p.Ala1680Val. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.19% of alleles in individuals of Ashkenazi Jewish descent in gnomAD, but at lower frequencies in other sub-populations (http://gnomad.broadinstitute.org/variant/3-49159178-G-A). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence.

Comment:

The c.5039C>T (p.A1680V) alteration is located in exon 30 (coding exon 30) of the LAMB2 gene. This alteration results from a C to T substitution at nucleotide position 5039, causing the alanine (A) at amino acid position 1680 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

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 rs141473691 ...

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_002292.4(LAMB2):c.5039C>T (p.Ala1680Val)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for rs141473691 ...