16-56502748-T-C

Position:

chr16-56502748-T-C

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_031885.5(BBS2):c.865A>G(p.Ile289Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00373 in 1,614,146 control chromosomes in the GnomAD database, including 182 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0031 ( 13 hom., cov: 32)

Exomes 𝑓: 0.0038 ( 169 hom. )

Consequence

BBS2
NM_031885.5 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: -0.133

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 links:

BBS2 (HGNC:):

BBS2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0027303994).

BP6

Variant 16-56502748-T-C is Benign according to our data. Variant chr16-56502748-T-C is described in ClinVar as [Benign]. Clinvar id is 319861.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-56502748-T-C is described in Lovd as [Likely_benign]. Variant chr16-56502748-T-C is described in Lovd as [Benign].

BA1

GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.0507 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BBS2	NM_031885.5 linkuse as main transcript	c.865A>G	p.Ile289Val	missense_variant	8/17	ENST00000245157.11	NP_114091.4	Q9BXC9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BBS2	ENST00000245157.11 linkuse as main transcript	c.865A>G	p.Ile289Val	missense_variant	8/17	1	NM_031885.5	ENSP00000245157.5		Q9BXC9

Frequencies

GnomAD3 genomes

AF:

0.00310

AC:

472

AN:

152144

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000676

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00105

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.0276

Gnomad SAS

AF:

0.0566

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00478

GnomAD3 exomes

AF:

0.00883

AC:

2221

AN:

251446

Hom.:

AF XY:

0.0106

AC XY:

1440

AN XY:

135890

show subpopulations

Gnomad AFR exome

AF:

0.000800

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0339

Gnomad SAS exome

AF:

0.0501

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000703

Gnomad OTH exome

AF:

0.00619

GnomAD4 exome

AF:

0.00380

AC:

5554

AN:

1461884

Hom.:

169

Cov.:

AF XY:

0.00512

AC XY:

3727

AN XY:

727246

show subpopulations

Gnomad4 AFR exome

AF:

0.000597

Gnomad4 AMR exome

AF:

0.000112

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0205

Gnomad4 SAS exome

AF:

0.0496

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000576

Gnomad4 OTH exome

AF:

0.00594

GnomAD4 genome

AF:

0.00309

AC:

470

AN:

152262

Hom.:

Cov.:

AF XY:

0.00419

AC XY:

312

AN XY:

74452

show subpopulations

Gnomad4 AFR

AF:

0.000674

Gnomad4 AMR

AF:

0.00105

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.0276

Gnomad4 SAS

AF:

0.0562

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00473

Alfa

AF:

0.00174

Hom.:

Bravo

AF:

0.00181

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000682

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00936

AC:

1136

Asia WGS

AF:

0.0420

AC:

147

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.000119

ClinVar

Significance: Benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Bardet-Biedl syndrome 2

Benign:2

Benign, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 16, 2020	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	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 provided

Benign:2

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -

not specified

Benign:1

Benign, no assertion criteria provided

clinical testing

Genome Diagnostics Laboratory, Amsterdam University Medical Center

- -

Retinal dystrophy

Benign:1

Benign, criteria provided, single submitter

research

Dept Of Ophthalmology, Nagoya University

Oct 01, 2023

- -

Bardet-Biedl syndrome

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.049

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.41

CADD

Benign

0.16

DANN

Benign

0.44

DEOGEN2

Benign

0.31

T;.

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.054

LIST_S2

Benign

0.71

T;.

MetaRNN

Benign

0.0027

T;T

MetaSVM

Benign

-0.93

PrimateAI

Benign

0.26

PROVEAN

Benign

-0.27

N;N

REVEL

Benign

0.29

Sift

Benign

0.96

T;T

Sift4G

Benign

1.0

T;T

Vest4

0.21

MVP

0.42

MPC

0.21

ClinPred

0.0035

GERP RS

-7.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

gMVP

0.20

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

Details are displayed if max score is > 0.2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over