rs79900021

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_031885.5(BBS2):c.718-34G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0467 in 1,609,490 control chromosomes in the GnomAD database, including 2,567 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.042 ( 209 hom., cov: 32)

Exomes 𝑓: 0.047 ( 2358 hom. )

Consequence

BBS2
NM_031885.5 intron

Scores

Clinical Significance

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

Conservation

PhyloP100: 0.656

Publications

3 publications found

Variant links:

Genes affected

BBS2 (HGNC:967): (Bardet-Biedl syndrome 2) This gene is a member of the Bardet-Biedl syndrome (BBS) gene family. Bardet-Biedl syndrome is an autosomal recessive disorder characterized by severe pigmentary retinopathy, obesity, polydactyly, renal malformation and cognitive disability. The proteins encoded by BBS gene family members are structurally diverse and the similar phenotypes exhibited by mutations in BBS gene family members is likely due to their shared roles in cilia formation and function. Many BBS proteins localize to the basal bodies, ciliary axonemes, and pericentriolar regions of cells. BBS proteins may also be involved in intracellular trafficking via microtubule-related transport. The protein encoded by this gene forms a multiprotein BBSome complex with seven other BBS proteins.[provided by RefSeq, Oct 2014]

BBS2 Gene-Disease associations (from GenCC):

Bardet-Biedl syndrome 2
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae), Myriad Women’s Health
ciliopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
retinitis pigmentosa 74
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
retinitis pigmentosa
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Bardet-Biedl syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

BBS2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.76).

BP6

Variant 16-56506070-C-T is Benign according to our data. Variant chr16-56506070-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 261983.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.146 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BBS2	NM_031885.5 link	c.718-34G>A		intron_variant	Intron 6 of 16	ENST00000245157.11	NP_114091.4	Q9BXC9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BBS2	ENST00000245157.11 link	c.718-34G>A		intron_variant	Intron 6 of 16	1	NM_031885.5	ENSP00000245157.5		Q9BXC9

Frequencies

GnomAD3 genomes

AF:

0.0422

AC:

6422

AN:

152160

Hom.:

210

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0236

Gnomad AMI

AF:

0.00768

Gnomad AMR

AF:

0.0328

Gnomad ASJ

AF:

0.0153

Gnomad EAS

AF:

0.156

Gnomad SAS

AF:

0.136

Gnomad FIN

AF:

0.0510

Gnomad MID

AF:

0.0222

Gnomad NFE

AF:

0.0410

Gnomad OTH

AF:

0.0392

GnomAD2 exomes

AF:

0.0600

AC:

15027

AN:

250482

AF XY:

0.0635

show subpopulations

Gnomad AFR exome

AF:

0.0239

Gnomad AMR exome

AF:

0.0450

Gnomad ASJ exome

AF:

0.0176

Gnomad EAS exome

AF:

0.170

Gnomad FIN exome

AF:

0.0454

Gnomad NFE exome

AF:

0.0402

Gnomad OTH exome

AF:

0.0531

GnomAD4 exome

AF:

0.0472

AC:

68788

AN:

1457214

Hom.:

2358

Cov.:

AF XY:

0.0495

AC XY:

35873

AN XY:

725304

show subpopulations

African (AFR)

AF:

0.0239

AC:

798

AN:

33404

American (AMR)

AF:

0.0419

AC:

1871

AN:

44696

Ashkenazi Jewish (ASJ)

AF:

0.0180

AC:

470

AN:

26104

East Asian (EAS)

AF:

0.122

AC:

4826

AN:

39640

South Asian (SAS)

AF:

0.126

AC:

10835

AN:

86134

European-Finnish (FIN)

AF:

0.0448

AC:

2390

AN:

53362

Middle Eastern (MID)

AF:

0.0416

AC:

240

AN:

5764

European-Non Finnish (NFE)

AF:

0.0399

AC:

44210

AN:

1107882

Other (OTH)

AF:

0.0523

AC:

3148

AN:

60228

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

3516

7031

10547

14062

17578

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

1784

3568

5352

7136

8920

<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

AF:

0.0422

AC:

6424

AN:

152276

Hom.:

209

Cov.:

AF XY:

0.0448

AC XY:

3336

AN XY:

74450

show subpopulations

African (AFR)

AF:

0.0236

AC:

980

AN:

41560

American (AMR)

AF:

0.0329

AC:

503

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.0153

AC:

AN:

3468

East Asian (EAS)

AF:

0.155

AC:

805

AN:

5190

South Asian (SAS)

AF:

0.135

AC:

650

AN:

4822

European-Finnish (FIN)

AF:

0.0510

AC:

541

AN:

10610

Middle Eastern (MID)

AF:

0.0238

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0410

AC:

2790

AN:

68000

Other (OTH)

AF:

0.0416

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

311

621

932

1242

1553

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

168

252

336

420

<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:

0.0402

Hom.:

Bravo

AF:

0.0392

Asia WGS

AF:

0.156

AC:

542

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

May 10, 2021

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

not specified

Benign:1

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Retinitis pigmentosa 74

Benign:1

Jul 01, 2021

Genome-Nilou Lab

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Bardet-Biedl syndrome 2

Benign:1

Jul 01, 2021

Genome-Nilou Lab

Significance:Likely 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

-0.76

CADD

Benign

9.2

(source)

DANN

Benign

0.70

PhyloP100

0.66

Mutation Taster

=100/0

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

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over