Variant summary: The NBN c.2149A>T (p.Thr717Ser) variant located in the DNA repair Nbs1, C-terminal domain (via InterPro) involves the alteration of a non-conserved nucleotide and 5/5 in silico tools predict a benign outcome for this variant. However, these predictions have yet to be functionally assessed. This variant is absent in 121388 control chromosomes and has not, to our knowledge been reported in affected indivduals in the literature. In addition, multiple clinical diagnostic laboratories/reputable databases classified this variant as uncertain significance. Because of the absence of clinical information and the lack of functional studies, the variant is classified as a "Variant of Uncertain Significance (VUS)," until additional information becomes available.
ClinVar Genomic variation as it relates to human health
NM_002485.5(NBN):c.2149A>T (p.Thr717Ser)
Germline
Classification
Help
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)
Help
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
11
criteria provided, multiple submitters, no conflicts
Somatic
No data submitted for somatic clinical impact
Somatic
No data submitted for oncogenicity
Variant Details
- Identifiers
-
NM_002485.5(NBN):c.2149A>T (p.Thr717Ser)
Variation ID: 127865 Accession: VCV000127865.35
- Type and length
-
single nucleotide variant, 1 bp
- Location
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Cytogenetic: 8q21.3 8: 89943288 (GRCh38) [ NCBI UCSC ] 8: 90955516 (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 Jan 7, 2017 Aug 18, 2024 Jan 4, 2024 - HGVS
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... more HGVS ... less HGVSNucleotide Protein Molecular
consequenceNM_002485.5:c.2149A>T MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.
NP_002476.2:p.Thr717Ser missense NM_001024688.3:c.1903A>T NP_001019859.1:p.Thr635Ser missense NC_000008.11:g.89943288T>A NC_000008.10:g.90955516T>A NG_008860.1:g.46384A>T LRG_158:g.46384A>T LRG_158t1:c.2149A>T LRG_158p1:p.Thr717Ser - Protein change
- T717S, T635S
- Other names
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p.T717S:ACA>TCA
- Canonical SPDI
- NC_000008.11:89943287:T:A
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Functional
consequence HelpThe effect of the variant on RNA or protein function, based on experimental evidence from submitters.
- -
-
Global minor allele
frequency (GMAF) HelpThe 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.
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The Genome Aggregation Database (gnomAD) 0.00001
Trans-Omics for Precision Medicine (TOPMed) 0.00001
- Links
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 | ||
|---|---|---|---|---|---|---|
| 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. |
|||
| NBN | Sufficient evidence for dosage pathogenicity | No evidence available |
GRCh38 GRCh37 |
3421 | 3594 | |
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. |
|---|---|---|---|---|
| Uncertain significance (2) |
criteria provided, multiple submitters, no conflicts
|
Jan 11, 2023 | RCV000115788.16 | |
| Uncertain significance (4) |
criteria provided, multiple submitters, no conflicts
|
Jan 4, 2024 | RCV000534044.18 | |
| Uncertain significance (2) |
criteria provided, multiple submitters, no conflicts
|
Mar 18, 2022 | RCV000212755.8 | |
| Uncertain significance (1) |
criteria provided, single submitter
|
May 23, 2017 | RCV000515194.4 | |
| Uncertain significance (2) |
criteria provided, multiple submitters, no conflicts
|
Jun 11, 2021 | RCV000780522.6 |
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. |
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|---|---|---|---|---|---|
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Uncertain significance
(Sep 12, 2017)
|
criteria provided, single submitter
Method: clinical testing
|
not specified
Affected status: unknown
Allele origin:
germline
|
Women's Health and Genetics/Laboratory Corporation of America, LabCorp
Accession: SCV000917850.1
First in ClinVar: Jun 02, 2019 Last updated: Jun 02, 2019 |
Comment:
Variant summary: The NBN c.2149A>T (p.Thr717Ser) variant located in the DNA repair Nbs1, C-terminal domain (via InterPro) involves the alteration of a non-conserved nucleotide and … (more)
Variant summary: The NBN c.2149A>T (p.Thr717Ser) variant located in the DNA repair Nbs1, C-terminal domain (via InterPro) involves the alteration of a non-conserved nucleotide and 5/5 in silico tools predict a benign outcome for this variant. However, these predictions have yet to be functionally assessed. This variant is absent in 121388 control chromosomes and has not, to our knowledge been reported in affected indivduals in the literature. In addition, multiple clinical diagnostic laboratories/reputable databases classified this variant as uncertain significance. Because of the absence of clinical information and the lack of functional studies, the variant is classified as a "Variant of Uncertain Significance (VUS)," until additional information becomes available. (less)
|
|
|
Uncertain significance
(Nov 07, 2021)
|
criteria provided, single submitter
Method: clinical testing
|
Microcephaly, normal intelligence and immunodeficiency
Affected status: no
Allele origin:
germline
|
Genome-Nilou Lab
Accession: SCV002046048.1
First in ClinVar: Jan 03, 2022 Last updated: Jan 03, 2022 |
|
|
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Uncertain significance
(Jun 11, 2021)
|
criteria provided, single submitter
Method: clinical testing
|
not specified
Affected status: no
Allele origin:
germline
|
Genetic Services Laboratory, University of Chicago
Accession: SCV002065379.1
First in ClinVar: Jan 29, 2022 Last updated: Jan 29, 2022 |
Comment:
DNA sequence analysis of the NBN gene demonstrated a sequence change, c.2149A>T, in exon 14 that results in an amino acid change, p.Thr717Ser. This sequence … (more)
DNA sequence analysis of the NBN gene demonstrated a sequence change, c.2149A>T, in exon 14 that results in an amino acid change, p.Thr717Ser. This sequence change has not been described in the gnomAD database. The p.Thr717Ser change affects a poorly conserved amino acid residue located in a domain of the NBN protein that is known to be functional. The p.Thr717Ser substitution appears to be benign using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). This sequence change has been reported as a variant of uncertain significance in an individual who underwent germline genetic testing based on a personal and/or family history of cancer (PMID: 31159747). Due to insufficient evidences and the lack of functional studies, the clinical significance of the p.Thr717Ser change remains unknown at this time. (less)
|
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Uncertain significance
(Mar 18, 2022)
|
criteria provided, single submitter
Method: clinical testing
|
Not Provided
Affected status: yes
Allele origin:
germline
|
GeneDx
Accession: SCV000149697.15
First in ClinVar: May 17, 2014 Last updated: Mar 04, 2023 |
Comment:
Not observed in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Observed in an individual with … (more)
Not observed in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Observed in an individual with breast cancer (Hauke 2018); This variant is associated with the following publications: (PMID: 29522266, 31159747) (less)
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|
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Uncertain significance
(-)
|
criteria provided, single submitter
Method: not provided
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not provided
(Autosomal recessive inheritance)
Affected status: yes
Allele origin:
germline
|
Breakthrough Genomics, Breakthrough Genomics
Accession: SCV005196017.1
First in ClinVar: Aug 18, 2024 Last updated: Aug 18, 2024 |
|
|
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Uncertain significance
(May 23, 2017)
|
criteria provided, single submitter
Method: clinical testing
|
Microcephaly, normal intelligence and immunodeficiency
Aplastic anemia Acute lymphoid leukemia
Affected status: unknown
Allele origin:
unknown
|
Fulgent Genetics, Fulgent Genetics
Accession: SCV000611487.1
First in ClinVar: Nov 11, 2017 Last updated: Nov 11, 2017 |
|
|
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Uncertain significance
(Aug 01, 2018)
|
criteria provided, single submitter
Method: clinical testing
|
Hereditary cancer-predisposing syndrome
Affected status: yes
Allele origin:
germline
|
GeneKor MSA
Accession: SCV000822084.1
First in ClinVar: Oct 10, 2018 Last updated: Oct 10, 2018 |
|
|
|
Uncertain significance
(May 28, 2019)
|
criteria provided, single submitter
Method: clinical testing
|
Microcephaly, normal intelligence and immunodeficiency
Affected status: unknown
Allele origin:
unknown
|
Mendelics
Accession: SCV001137655.1
First in ClinVar: Jan 09, 2020 Last updated: Jan 09, 2020 |
|
|
|
Uncertain significance
(Jan 04, 2024)
|
criteria provided, single submitter
Method: clinical testing
|
Microcephaly, normal intelligence and immunodeficiency
Affected status: unknown
Allele origin:
germline
|
Labcorp Genetics (formerly Invitae), Labcorp
Accession: SCV000634278.9
First in ClinVar: Dec 26, 2017 Last updated: Feb 20, 2024 |
Comment:
This sequence change replaces threonine, which is neutral and polar, with serine, which is neutral and polar, at codon 717 of the NBN protein (p.Thr717Ser). … (more)
This sequence change replaces threonine, which is neutral and polar, with serine, which is neutral and polar, at codon 717 of the NBN protein (p.Thr717Ser). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of NBN-related conditions (PMID: 31159747). ClinVar contains an entry for this variant (Variation ID: 127865). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. 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
(Jan 11, 2023)
|
criteria provided, single submitter
Method: clinical testing
|
Hereditary cancer-predisposing syndrome
Affected status: unknown
Allele origin:
germline
|
Ambry Genetics
Accession: SCV000185476.9
First in ClinVar: Aug 06, 2014 Last updated: May 01, 2024 |
Comment:
The p.T717S variant (also known as c.2149A>T), located in coding exon 14 of the NBN gene, results from an A to T substitution at nucleotide … (more)
The p.T717S variant (also known as c.2149A>T), located in coding exon 14 of the NBN gene, results from an A to T substitution at nucleotide position 2149. The threonine at codon 717 is replaced by serine, an amino acid with similar properties. This alteration was detected in 1/5589 German BRCA1/2-negative probands with breast cancer (Hauke J et al. Cancer Med, 2018 04;7:1349-1358), as well as 1/1197 individuals from Greece, Romania, and Turkey undergoing evaluation for inherited cancer predisposition (Tsaousis GN et al. BMC Cancer, 2019 Jun;19:535). This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. (less)
|
|
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Uncertain significance
(Jan 29, 2020)
|
no assertion criteria provided
Method: clinical testing
|
Nijmegen breakage syndrome
Affected status: unknown
Allele origin:
germline
|
Natera, Inc.
Accession: SCV002078505.1
First in ClinVar: Apr 23, 2022 Last updated: Apr 23, 2022 |
|
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Comment:
Comment:
DNA sequence analysis of the NBN gene demonstrated a sequence change, c.2149A>T, in exon 14 that results in an amino acid change, p.Thr717Ser. This sequence change has not been described in the gnomAD database. The p.Thr717Ser change affects a poorly conserved amino acid residue located in a domain of the NBN protein that is known to be functional. The p.Thr717Ser substitution appears to be benign using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). This sequence change has been reported as a variant of uncertain significance in an individual who underwent germline genetic testing based on a personal and/or family history of cancer (PMID: 31159747). Due to insufficient evidences and the lack of functional studies, the clinical significance of the p.Thr717Ser change remains unknown at this time.
Comment:
Not observed in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Observed in an individual with breast cancer (Hauke 2018); This variant is associated with the following publications: (PMID: 29522266, 31159747)
Comment:
This sequence change replaces threonine, which is neutral and polar, with serine, which is neutral and polar, at codon 717 of the NBN protein (p.Thr717Ser). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of NBN-related conditions (PMID: 31159747). ClinVar contains an entry for this variant (Variation ID: 127865). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. 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 p.T717S variant (also known as c.2149A>T), located in coding exon 14 of the NBN gene, results from an A to T substitution at nucleotide position 2149. The threonine at codon 717 is replaced by serine, an amino acid with similar properties. This alteration was detected in 1/5589 German BRCA1/2-negative probands with breast cancer (Hauke J et al. Cancer Med, 2018 04;7:1349-1358), as well as 1/1197 individuals from Greece, Romania, and Turkey undergoing evaluation for inherited cancer predisposition (Tsaousis GN et al. BMC Cancer, 2019 Jun;19:535). This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, 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:
Variant summary: The NBN c.2149A>T (p.Thr717Ser) variant located in the DNA repair Nbs1, C-terminal domain (via InterPro) involves the alteration of a non-conserved nucleotide and 5/5 in silico tools predict a benign outcome for this variant. However, these predictions have yet to be functionally assessed. This variant is absent in 121388 control chromosomes and has not, to our knowledge been reported in affected indivduals in the literature. In addition, multiple clinical diagnostic laboratories/reputable databases classified this variant as uncertain significance. Because of the absence of clinical information and the lack of functional studies, the variant is classified as a "Variant of Uncertain Significance (VUS)," until additional information becomes available.
Comment:
DNA sequence analysis of the NBN gene demonstrated a sequence change, c.2149A>T, in exon 14 that results in an amino acid change, p.Thr717Ser. This sequence change has not been described in the gnomAD database. The p.Thr717Ser change affects a poorly conserved amino acid residue located in a domain of the NBN protein that is known to be functional. The p.Thr717Ser substitution appears to be benign using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). This sequence change has been reported as a variant of uncertain significance in an individual who underwent germline genetic testing based on a personal and/or family history of cancer (PMID: 31159747). Due to insufficient evidences and the lack of functional studies, the clinical significance of the p.Thr717Ser change remains unknown at this time.
Comment:
Not observed in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Observed in an individual with breast cancer (Hauke 2018); This variant is associated with the following publications: (PMID: 29522266, 31159747)
Comment:
This sequence change replaces threonine, which is neutral and polar, with serine, which is neutral and polar, at codon 717 of the NBN protein (p.Thr717Ser). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of NBN-related conditions (PMID: 31159747). ClinVar contains an entry for this variant (Variation ID: 127865). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. 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 p.T717S variant (also known as c.2149A>T), located in coding exon 14 of the NBN gene, results from an A to T substitution at nucleotide position 2149. The threonine at codon 717 is replaced by serine, an amino acid with similar properties. This alteration was detected in 1/5589 German BRCA1/2-negative probands with breast cancer (Hauke J et al. Cancer Med, 2018 04;7:1349-1358), as well as 1/1197 individuals from Greece, Romania, and Turkey undergoing evaluation for inherited cancer predisposition (Tsaousis GN et al. BMC Cancer, 2019 Jun;19:535). This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.
Citations for germline classification of this variant
Help| Title | Author | Journal | Year | Link |
|---|---|---|---|---|
| Analysis of hereditary cancer syndromes by using a panel of genes: novel and multiple pathogenic mutations. | Tsaousis GN | BMC cancer | 2019 | PMID: 31159747 |
| Gene panel testing of 5589 BRCA1/2-negative index patients with breast cancer in a routine diagnostic setting: results of the German Consortium for Hereditary Breast and Ovarian Cancer. | Hauke J | Cancer medicine | 2018 | PMID: 29522266 |
| Exome sequencing of oral squamous cell carcinoma in users of Arabian snuff reveals novel candidates for driver genes. | Al-Hebshi NN | International journal of cancer | 2016 | PMID: 26934577 |
Text-mined citations for rs587780093 ...
HelpThese 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
This date represents the last time this VCV record was updated. The update may be due to an update to one of the included submitted records (SCVs), or due to an update that ClinVar made to the variant such as adding HGVS expressions or a rs number. So this date may be different from the date of the “most recent submission” reported at the top of this page.