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.
ClinVar Genomic variation as it relates to human health
NM_001358530.2(MOCS1):c.520G>A (p.Ala174Thr)
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.
(8)
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
8
criteria provided, multiple submitters, no conflicts
Somatic
No data submitted for somatic clinical impact
Somatic
No data submitted for oncogenicity
Variant Details
- Identifiers
-
NM_001358530.2(MOCS1):c.520G>A (p.Ala174Thr)
Variation ID: 356663 Accession: VCV000356663.39
- Type and length
-
single nucleotide variant, 1 bp
- Location
-
Cytogenetic: 6p21.2 6: 39916131 (GRCh38) [ NCBI UCSC ] 6: 39883875 (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 May 17, 2023 - HGVS
-
... more HGVS ... less HGVSNucleotide Protein Molecular
consequenceNM_001358530.2:c.520G>A MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.
NP_001345459.1:p.Ala174Thr missense NM_001075098.4:c.520G>A NP_001068566.1:p.Ala174Thr missense NM_001358529.2:c.520G>A NP_001345458.1:p.Ala174Thr missense NM_001358531.2:c.259G>A NP_001345460.1:p.Ala87Thr missense NM_001358533.2:c.259G>A NP_001345462.1:p.Ala87Thr missense NM_001358534.2:c.259G>A NP_001345463.1:p.Ala87Thr missense NM_005943.6:c.520G>A NP_005934.2:p.Ala174Thr missense NR_033233.2:n.438G>A non-coding transcript variant NC_000006.12:g.39916131C>T NC_000006.11:g.39883875C>T NG_009297.1:g.23380G>A - Protein change
- A174T, A87T
- Other names
-
p.Ala174Thr
- Canonical SPDI
- NC_000006.12:39916130:C:T
-
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.
-
The Genome Aggregation Database (gnomAD), exomes 0.00014
Exome Aggregation Consortium (ExAC) 0.00016
The Genome Aggregation Database (gnomAD) 0.00016
Trans-Omics for Precision Medicine (TOPMed) 0.00017
NHLBI Exome Sequencing Project (ESP) Exome Variant Server 0.00038
- 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. |
|||
| MOCS1 | - | - |
GRCh38 GRCh37 |
672 | 704 | |
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 (5) |
criteria provided, multiple submitters, no conflicts
|
Oct 25, 2022 | RCV000313707.14 | |
| Uncertain significance (2) |
criteria provided, multiple submitters, no conflicts
|
May 17, 2023 | RCV000998595.23 | |
| Uncertain significance (1) |
criteria provided, single submitter
|
Nov 14, 2022 | RCV002524477.3 |
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. |
|
|---|---|---|---|---|---|
|
Uncertain significance
(Jan 13, 2018)
|
criteria provided, single submitter
Method: clinical testing
|
Sulfite oxidase deficiency due to molybdenum cofactor deficiency type A
Affected status: unknown
Allele origin:
germline
|
Illumina Laboratory Services, Illumina
Accession: SCV000462932.3
First in ClinVar: Dec 06, 2016 Last updated: Aug 20, 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
(May 20, 2022)
|
criteria provided, single submitter
Method: clinical testing
|
Sulfite oxidase deficiency due to molybdenum cofactor deficiency type A
Affected status: unknown
Allele origin:
unknown
|
Fulgent Genetics, Fulgent Genetics
Accession: SCV002794036.1
First in ClinVar: Dec 31, 2022 Last updated: Dec 31, 2022 |
|
|
|
Uncertain significance
(Oct 25, 2022)
|
criteria provided, single submitter
Method: clinical testing
|
Sulfite oxidase deficiency due to molybdenum cofactor deficiency type A
Affected status: unknown
Allele origin:
germline
|
Labcorp Genetics (formerly Invitae), Labcorp
Accession: SCV001508084.3
First in ClinVar: Mar 14, 2021 Last updated: Feb 07, 2023 |
Comment:
This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 174 of the MOCS1 protein (p.Ala174Thr). … (more)
This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 174 of the MOCS1 protein (p.Ala174Thr). This variant is present in population databases (rs143573353, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with MOCS1-related conditions. ClinVar contains an entry for this variant (Variation ID: 356663). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Not Available". The threonine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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
(May 17, 2023)
|
criteria provided, single submitter
Method: clinical testing
|
Not provided
Affected status: unknown
Allele origin:
germline
|
Mayo Clinic Laboratories, Mayo Clinic
Accession: SCV004227235.1
First in ClinVar: Jan 06, 2024 Last updated: Jan 06, 2024 |
Comment:
PM2
Number of individuals with the variant: 1
|
|
|
Uncertain significance
(Jan 22, 2021)
|
criteria provided, single submitter
Method: clinical testing
|
Sulfite oxidase deficiency due to molybdenum cofactor deficiency type A
Affected status: unknown
Allele origin:
germline
|
Revvity Omics, Revvity
Accession: SCV003808886.2
First in ClinVar: Mar 04, 2023 Last updated: Feb 04, 2024 |
|
|
|
Uncertain significance
(Nov 14, 2022)
|
criteria provided, single submitter
Method: clinical testing
|
Inborn genetic diseases
Affected status: unknown
Allele origin:
germline
|
Ambry Genetics
Accession: SCV003546301.2
First in ClinVar: Feb 07, 2023 Last updated: May 01, 2024 |
Comment:
The c.520G>A (p.A174T) alteration is located in exon 3 (coding exon 3) of the MOCS1 gene. This alteration results from a G to A substitution … (more)
The c.520G>A (p.A174T) alteration is located in exon 3 (coding exon 3) of the MOCS1 gene. This alteration results from a G to A substitution at nucleotide position 520, causing the alanine (A) at amino acid position 174 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. (less)
|
|
|
Uncertain significance
(-)
|
criteria provided, single submitter
Method: clinical testing
|
Sulfite oxidase deficiency due to molybdenum cofactor deficiency type A
(Autosomal recessive inheritance)
Affected status: yes
Allele origin:
germline
|
Neuberg Centre For Genomic Medicine, NCGM
Accession: SCV005060914.1
First in ClinVar: Jun 17, 2024 Last updated: Jun 17, 2024 |
Comment:
The missense variant c.520G>A(p.Ala174Thr) in MOCS1 gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. The … (more)
The missense variant c.520G>A(p.Ala174Thr) in MOCS1 gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. The observed variant has allele frequency of 0.01% in gnomAD exomes database. This variant has been submitted to the ClinVar database as Uncertain Significance. The amino acid change p.Ala174Thr in MOCS1 is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. The amino acid Ala at position 174 is changed to a Thr changing protein sequence and it might alter its composition and physico-chemical properties. For these reasons, this variant has been classified as Uncertain Significance (VUS). (less)
|
|
|
Uncertain significance
(Mar 01, 2023)
|
criteria provided, single submitter
Method: clinical testing
|
not provided
Affected status: yes
Allele origin:
germline
|
CeGaT Center for Human Genetics Tuebingen
Accession: SCV001154737.27
First in ClinVar: Feb 03, 2020 Last updated: Oct 20, 2024 |
Number of individuals with the variant: 2
|
Comment:
Comment:
This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 174 of the MOCS1 protein (p.Ala174Thr). This variant is present in population databases (rs143573353, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with MOCS1-related conditions. ClinVar contains an entry for this variant (Variation ID: 356663). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Not Available". The threonine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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:
PM2
Comment:
The c.520G>A (p.A174T) alteration is located in exon 3 (coding exon 3) of the MOCS1 gene. This alteration results from a G to A substitution at nucleotide position 520, causing the alanine (A) at amino acid position 174 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.
Comment:
The missense variant c.520G>A(p.Ala174Thr) in MOCS1 gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. The observed variant has allele frequency of 0.01% in gnomAD exomes database. This variant has been submitted to the ClinVar database as Uncertain Significance. The amino acid change p.Ala174Thr in MOCS1 is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. The amino acid Ala at position 174 is changed to a Thr changing protein sequence and it might alter its composition and physico-chemical properties. For these reasons, this variant has been classified as Uncertain Significance (VUS).
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:
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 threonine, which is neutral and polar, at codon 174 of the MOCS1 protein (p.Ala174Thr). This variant is present in population databases (rs143573353, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with MOCS1-related conditions. ClinVar contains an entry for this variant (Variation ID: 356663). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Not Available". The threonine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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:
PM2
Comment:
The c.520G>A (p.A174T) alteration is located in exon 3 (coding exon 3) of the MOCS1 gene. This alteration results from a G to A substitution at nucleotide position 520, causing the alanine (A) at amino acid position 174 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.
Comment:
The missense variant c.520G>A(p.Ala174Thr) in MOCS1 gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. The observed variant has allele frequency of 0.01% in gnomAD exomes database. This variant has been submitted to the ClinVar database as Uncertain Significance. The amino acid change p.Ala174Thr in MOCS1 is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. The amino acid Ala at position 174 is changed to a Thr changing protein sequence and it might alter its composition and physico-chemical properties. For these reasons, this variant has been classified as Uncertain Significance (VUS).
Citations for germline classification of this variant
Help| 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 rs143573353 ...
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 Oct 20, 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.