rs1801181

Variant names:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6_Very_StrongBP7

The NM_000071.3(CBS):c.1080C>T(p.Ala360Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.083 ( 0 hom., cov: 0)

Exomes 𝑓: 0.38 ( 3618 hom. )

Failed GnomAD Quality Control

Consequence

CBS
NM_000071.3 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts U:1B:16

Conservation

PhyloP100: -2.38

Publications

49 publications found

Variant links:

Genes affected

CBS (HGNC:1550): (cystathionine beta-synthase) The protein encoded by this gene acts as a homotetramer to catalyze the conversion of homocysteine to cystathionine, the first step in the transsulfuration pathway. The encoded protein is allosterically activated by adenosyl-methionine and uses pyridoxal phosphate as a cofactor. Defects in this gene can cause cystathionine beta-synthase deficiency (CBSD), which can lead to homocystinuria. This gene is a major contributor to cellular hydrogen sulfide production. Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Feb 2016]

CBS Gene-Disease associations (from GenCC):

classic homocystinuria
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae), Myriad Women’s Health, PanelApp Australia, ClinGen, Genomics England PanelApp

CBS links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (REVEL=0.009).

BP6

Variant 21-43060506-G-A is Benign according to our data. Variant chr21-43060506-G-A is described in ClinVar as Benign. ClinVar VariationId is 92424.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.38 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CBS	NM_000071.3 link	c.1080C>T	p.Ala360Ala	synonymous_variant	Exon 12 of 17	ENST00000398165.8	NP_000062.1	P35520-1Q9NTF0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CBS	ENST00000398165.8 link	c.1080C>T	p.Ala360Ala	synonymous_variant	Exon 12 of 17	1	NM_000071.3	ENSP00000381231.4		P35520-1

Frequencies

GnomAD3 genomes

AF:

0.0714

AC:

AN:

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad SAS

AF:

0.167

Gnomad NFE

AF:

0.00

GnomAD2 exomes

AF:

0.334

AC:

80942

AN:

242274

AF XY:

0.344

show subpopulations

Gnomad AFR exome

AF:

0.0626

Gnomad AMR exome

AF:

0.167

Gnomad ASJ exome

AF:

0.344

Gnomad EAS exome

AF:

0.614

Gnomad FIN exome

AF:

0.438

Gnomad NFE exome

AF:

0.362

Gnomad OTH exome

AF:

0.345

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.382

AC:

15726

AN:

41214

Hom.:

3618

Cov.:

AF XY:

0.382

AC XY:

8379

AN XY:

21958

show subpopulations

African (AFR)

AF:

0.0571

AC:

152

AN:

2660

American (AMR)

AF:

0.212

AC:

802

AN:

3778

Ashkenazi Jewish (ASJ)

AF:

0.381

AC:

342

AN:

898

East Asian (EAS)

AF:

0.609

AC:

1772

AN:

2908

South Asian (SAS)

AF:

0.342

AC:

2211

AN:

6474

European-Finnish (FIN)

AF:

0.524

AC:

553

AN:

1056

Middle Eastern (MID)

AF:

0.356

AC:

AN:

174

European-Non Finnish (NFE)

AF:

0.423

AC:

8956

AN:

21174

Other (OTH)

AF:

0.419

AC:

876

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.507

Heterozygous variant carriers

425

850

1276

1701

2126

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

112

224

336

448

560

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.0833

AC:

AN:

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

American (AMR)

AC:

AN:

Ashkenazi Jewish (ASJ)

AC:

AN:

East Asian (EAS)

AC:

AN:

South Asian (SAS)

AF:

0.167

AC:

AN:

European-Finnish (FIN)

AC:

AN:

Middle Eastern (MID)

AC:

AN:

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

Other (OTH)

AC:

AN:

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.333

Hom.:

3603

Asia WGS

AF:

0.419

AC:

1458

AN:

3478

EpiCase

AF:

0.355

EpiControl

AF:

0.355

ClinVar

Significance: Benign

Submissions summary: Uncertain:1Benign:16

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Classic homocystinuria

Benign:6

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Sep 16, 2020

Natera, Inc.

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jul 28, 2017

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Sep 23, 2015

Genome Diagnostics Laboratory, Amsterdam University Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jul 14, 2021

Genome-Nilou Lab

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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. -

not specified

Benign:5

Mar 12, 2014

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Clinical Genetics, Academic Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Apr 09, 2025

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 04, 2013

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Ala360Ala in exon 12 of CBS: This variant is not expected to have clinical signi ficance because it does not alter an amino acid residue and is not located withi n the splice consensus sequence. It has been identified in 35.9% (3087/8594) of European American chromosomes from a broad population by the NHLBI Exome Sequenc ing Project (http://evs.gs.washington.edu/EVS; dbSNP rs1801181). -

not provided

Uncertain:1Benign:3

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

multiple AR variants in same gene - keep for nowAllele frequency is common in at least one population database (frequency: 62.069% in ExAC) based on the frequency threshold of 1.432% for this gene.Variant was observed in a homozygous state in population databases more than expected for disease.10 reputable source/s reports the variant as benign, but the evidence is not available to the laboratory to perform an independent evaluation.A synonymous variant not located in a splice region. -

Oct 04, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Nov 27, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Familial thoracic aortic aneurysm and aortic dissection

Benign:1

Nov 24, 2014

Ambry Genetics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

HYPERHOMOCYSTEINEMIA, THROMBOTIC, CBS-RELATED

Benign:1

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.79

CADD

Benign

0.12

(source)

DANN

Benign

0.59

PhyloP100

-2.4

PromoterAI

-0.026

Neutral

(source)

Mutation Taster

=98/2

polymorphism (auto)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over