rs35690634

Positions:

chr4-122743343-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_152618.3(BBS12):c.1451G>A(p.Arg484Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000742 in 1,614,148 control chromosomes in the GnomAD database, including 15 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0040 ( 10 hom., cov: 33)

Exomes 𝑓: 0.00040 ( 5 hom. )

Consequence

BBS12
NM_152618.3 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: 0.232

Variant links:

Genes affected

BBS12 (HGNC:26648): (Bardet-Biedl syndrome 12) The protein encoded by this gene is part of a complex that is involved in membrane trafficking. The encoded protein is a molecular chaperone that aids in protein folding upon ATP hydrolysis. This protein also plays a role in adipocyte differentiation. Defects in this gene are a cause of Bardet-Biedl syndrome type 12. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, May 2010]

BBS12 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=0.0044073462).

BP6

Variant 4-122743343-G-A is Benign according to our data. Variant chr4-122743343-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 262673.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr4-122743343-G-A is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00405 (616/152260) while in subpopulation AFR AF= 0.0144 (596/41514). AF 95% confidence interval is 0.0134. There are 10 homozygotes in gnomad4. There are 298 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 10 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
BBS12	NM_152618.3 linkuse as main transcript	c.1451G>A	p.Arg484Lys	missense_variant	2/2	ENST00000314218.8	NP_689831.2
BBS12	NM_001178007.2 linkuse as main transcript	c.1451G>A	p.Arg484Lys	missense_variant	3/3		NP_001171478.1
BBS12	XM_011531680.3 linkuse as main transcript	c.1451G>A	p.Arg484Lys	missense_variant	2/2		XP_011529982.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BBS12	ENST00000314218.8 linkuse as main transcript	c.1451G>A	p.Arg484Lys	missense_variant	2/2	1	NM_152618.3	ENSP00000319062	P1
BBS12	ENST00000542236.5 linkuse as main transcript	c.1451G>A	p.Arg484Lys	missense_variant	3/3	2		ENSP00000438273	P1

Frequencies

GnomAD3 genomes

AF:

0.00405

AC:

616

AN:

152142

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0144

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000982

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:

0.00239

GnomAD3 exomes

AF:

0.000986

AC:

248

AN:

251446

Hom.:

AF XY:

0.000795

AC XY:

108

AN XY:

135896

show subpopulations

Gnomad AFR exome

AF:

0.0145

Gnomad AMR exome

AF:

0.000318

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000397

AC:

581

AN:

1461888

Hom.:

Cov.:

AF XY:

0.000331

AC XY:

241

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.0158

Gnomad4 AMR exome

AF:

0.000402

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.000447

GnomAD4 genome

AF:

0.00405

AC:

616

AN:

152260

Hom.:

Cov.:

AF XY:

0.00400

AC XY:

298

AN XY:

74462

show subpopulations

Gnomad4 AFR

AF:

0.0144

Gnomad4 AMR

AF:

0.000981

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00236

Alfa

AF:

0.000625

Hom.:

Bravo

AF:

0.00439

ESP6500AA

AF:

0.0111

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00114

AC:

138

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:3

Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Mar 31, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -

Bardet-Biedl syndrome 1

Benign:2

Benign, criteria provided, single submitter	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	Sep 21, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	Aug 20, 2015	- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

Bardet-Biedl syndrome 12

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 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 likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

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

0.078

BayesDel_addAF

Benign

-0.57

BayesDel_noAF

Benign

-0.58

CADD

Benign

1.2

DANN

Benign

0.40

DEOGEN2

Benign

0.16

T;T

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.19

LIST_S2

Benign

0.22

T;.

MetaRNN

Benign

0.0044

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.3

L;L

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.23

PROVEAN

Benign

-0.56

N;N

REVEL

Benign

0.16

Sift

Benign

1.0

T;T

Sift4G

Benign

0.55

T;T

Polyphen

0.0

B;B

Vest4

0.017

MVP

0.47

MPC

0.085

ClinPred

0.011

GERP RS

-0.99

Varity_R

0.036

gMVP

0.31

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

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