Genetic Variant CBS:c.1146-288T>C (chr21-43059591-A-G) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBP6_Very_Strong

The NM_000071.3(CBS):c.1146-288T>C variant causes a intron 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 0.25 ( 112 hom., cov: 0)

Failed GnomAD Quality Control

Consequence

CBS
NM_000071.3 intron

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.678

Publications

9 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 -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.9).

BP6

Variant 21-43059591-A-G is Benign according to our data. Variant chr21-43059591-A-G is described in ClinVar as Benign. ClinVar VariationId is 670959.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CBS	NM_000071.3 link	c.1146-288T>C		intron_variant	Intron 12 of 16	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.1146-288T>C		intron_variant	Intron 12 of 16	1	NM_000071.3	ENSP00000381231.4		P35520-1

Frequencies

GnomAD3 genomes

AF:

0.253

AC:

540

AN:

2134

Hom.:

111

Cov.:

show subpopulations

Gnomad AFR

AF:

0.102

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.194

Gnomad ASJ

AF:

0.385

Gnomad EAS

AF:

0.492

Gnomad SAS

AF:

0.286

Gnomad FIN

AF:

0.462

Gnomad MID

AF:

0.0385

Gnomad NFE

AF:

0.352

Gnomad OTH

AF:

0.196

GnomAD4 exome

Data not reliable, filtered out with message: AC0;AS_VQSR

AC:

AN:

Hom.:

Cov.:

AC XY:

AN XY:

African (AFR)

AC:

AN:

American (AMR)

AC:

AN:

Ashkenazi Jewish (ASJ)

AC:

AN:

East Asian (EAS)

AC:

AN:

South Asian (SAS)

AC:

AN:

European-Finnish (FIN)

AC:

AN:

Middle Eastern (MID)

AC:

AN:

European-Non Finnish (NFE)

AC:

AN:

Other (OTH)

AC:

AN:

GnomAD4 genome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.251

AC:

534

AN:

2124

Hom.:

112

Cov.:

AF XY:

0.253

AC XY:

275

AN XY:

1086

show subpopulations

African (AFR)

AF:

0.100

AC:

AN:

610

American (AMR)

AF:

0.188

AC:

AN:

416

Ashkenazi Jewish (ASJ)

AF:

0.385

AC:

AN:

East Asian (EAS)

AF:

0.492

AC:

122

AN:

248

South Asian (SAS)

AF:

0.294

AC:

AN:

252

European-Finnish (FIN)

AF:

0.462

AC:

AN:

Middle Eastern (MID)

AF:

0.0417

AC:

AN:

European-Non Finnish (NFE)

AF:

0.356

AC:

165

AN:

464

Other (OTH)

AF:

0.196

AC:

AN:

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.514

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome 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

Alfa

AF:

0.334

Hom.:

1916

Asia WGS

AF:

0.423

AC:

1471

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Jun 18, 2018

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. -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.90

CADD

Benign

1.6

(source)

DANN

Benign

0.59

PhyloP100

-0.68

Mutation Taster

=100/0

polymorphism (auto)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

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