rs145303290

Variant names:

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_StrongBP6_Very_StrongBP7BS2

The NM_000071.3(CBS):c.675C>T(p.Asn225Asn) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000289 in 1,279,486 control chromosomes in the GnomAD database, including 11 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0000080 ( 0 hom., cov: 15)

Exomes 𝑓: 0.000029 ( 11 hom. )

Failed GnomAD Quality Control

Consequence

CBS
NM_000071.3 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 0.163

Publications

0 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 -17 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.49).

BP6

Variant 21-43065264-G-A is Benign according to our data. Variant chr21-43065264-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 212821.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=0.163 with no splicing effect.

BS2

High Homozygotes in GnomAdExome4 at 11 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CBS	NM_000071.3 link	c.675C>T	p.Asn225Asn	synonymous_variant	Exon 8 of 17	ENST00000398165.8	NP_000062.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CBS	ENST00000398165.8 link	c.675C>T	p.Asn225Asn	synonymous_variant	Exon 8 of 17	1	NM_000071.3	ENSP00000381231.4

Frequencies

GnomAD3 genomes

AF:

0.00000797

AC:

AN:

125458

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000288

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000875

AC:

AN:

251390

AF XY:

0.0000809

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000132

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.0000289

AC:

AN:

1279486

Hom.:

Cov.:

AF XY:

0.0000266

AC XY:

AN XY:

638144

show subpopulations

African (AFR)

AF:

0.0000635

AC:

AN:

31490

American (AMR)

AF:

0.00

AC:

AN:

42884

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

22928

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39662

South Asian (SAS)

AF:

0.00

AC:

AN:

80062

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48950

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5134

European-Non Finnish (NFE)

AF:

0.0000346

AC:

AN:

954426

Other (OTH)

AF:

0.0000185

AC:

AN:

53950

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.458

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<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:

0.00000797

AC:

AN:

125458

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

60784

show subpopulations

African (AFR)

AF:

0.0000288

AC:

AN:

34722

American (AMR)

AF:

0.00

AC:

AN:

12586

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2894

East Asian (EAS)

AF:

0.00

AC:

AN:

5030

South Asian (SAS)

AF:

0.00

AC:

AN:

3826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

8528

Middle Eastern (MID)

AF:

0.00

AC:

AN:

252

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

55178

Other (OTH)

AF:

0.00

AC:

AN:

1668

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000605

Hom.:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000237

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Mar 31, 2015

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Familial thoracic aortic aneurysm and aortic dissection

Benign:1

Jul 21, 2017

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely 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

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:1

Feb 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

CBS: BP4, BP7 -

CBS-related disorder

Benign:1

Sep 26, 2023

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.49

CADD

Benign

3.6

(source)

DANN

Benign

0.81

PhyloP100

0.16

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over