rs754978707

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PP2PP3

The NM_152384.3(BBS5):c.203A>G(p.Asn68Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000218 in 1,607,124 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

BBS5
NM_152384.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 6.91

Publications

0 publications found

Variant links:

Genes affected

BBS5 (HGNC:970): (Bardet-Biedl syndrome 5) This gene encodes a protein that has been directly linked to Bardet-Biedl syndrome. The primary features of this syndrome include retinal dystrophy, obesity, polydactyly, renal abnormalities and learning disabilities. Experimentation in non-human eukaryotes suggests that this gene is expressed in ciliated cells and that it is required for the formation of cilia. Alternate transcriptional splice variants have been observed but have not been fully characterized. [provided by RefSeq, Jul 2008]

BBS5 Gene-Disease associations (from GenCC):

Bardet-Biedl syndrome 5
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Genomics England PanelApp, Ambry Genetics, Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae)
Bardet-Biedl syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

BBS5 links:

ENSG00000251569 (HGNC:):

ENSG00000251569 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 7 curated pathogenic missense variants (we use a threshold of 10). The gene has 1 curated benign missense variants. Gene score misZ: 0.85025 (below the threshold of 3.09). Trascript score misZ: 1.0056 (below the threshold of 3.09). GenCC associations: The gene is linked to Bardet-Biedl syndrome 5, Bardet-Biedl syndrome.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.817

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BBS5	NM_152384.3 link	c.203A>G	p.Asn68Ser	missense_variant	Exon 3 of 12	ENST00000295240.8	NP_689597.1	Q8N3I7-1A0A0S2Z626

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
BBS5	ENST00000295240.8 link	c.203A>G	p.Asn68Ser	missense_variant	Exon 3 of 12	1	NM_152384.3	ENSP00000295240.3	Q8N3I7-1
ENSG00000251569	ENST00000513963.1 link	c.203A>G	p.Asn68Ser	missense_variant	Exon 3 of 16	2		ENSP00000424363.1	E9PBE3
BBS5	ENST00000392663.6 link	c.203A>G	p.Asn68Ser	missense_variant	Exon 3 of 11	1		ENSP00000376431.2	Q8N3I7-2
BBS5	ENST00000443151.1 link	n.143-858A>G		intron_variant	Intron 2 of 5	5		ENSP00000406182.1	F8WBR7

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152108

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000478

AC:

AN:

251070

AF XY:

0.0000368

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000231

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000465

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000234

AC:

AN:

1455016

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

724302

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33332

American (AMR)

AF:

0.000224

AC:

AN:

44708

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26086

East Asian (EAS)

AF:

0.00

AC:

AN:

39550

South Asian (SAS)

AF:

0.00

AC:

AN:

86094

European-Finnish (FIN)

AF:

0.0000188

AC:

AN:

53154

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5710

European-Non Finnish (NFE)

AF:

0.0000199

AC:

AN:

1106224

Other (OTH)

AF:

0.0000166

AC:

AN:

60158

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

Exome 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

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152108

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74312

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41446

American (AMR)

AF:

0.00

AC:

AN:

15264

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67980

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000451

Hom.:

Bravo

AF:

0.0000302

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.0000494

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

BBS5-related disorder

Uncertain:1

Sep 05, 2024

PreventionGenetics, part of Exact Sciences

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

The BBS5 c.203A>G variant is predicted to result in the amino acid substitution p.Asn68Ser. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.023% of alleles in individuals of Latino descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Bardet-Biedl syndrome

Uncertain:1

Aug 16, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 68 of the BBS5 protein (p.Asn68Ser). This variant is present in population databases (rs754978707, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with BBS5-related conditions. ClinVar contains an entry for this variant (Variation ID: 412294). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Bardet-Biedl syndrome 5

Uncertain:1

Feb 23, 2022

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.097

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.37

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.55

D;.;.

Eigen

Pathogenic

0.69

Eigen_PC

Pathogenic

0.68

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.95

D;D;D

M_CAP

Benign

0.041

MetaRNN

Pathogenic

0.82

D;D;D

MetaSVM

Uncertain

0.18

MutationAssessor

Uncertain

2.0

M;M;.

PhyloP100

6.9

PROVEAN

Uncertain

-4.0

D;D;D

REVEL

Uncertain

0.62

Sift

Benign

0.13

T;T;T

Sift4G

Benign

0.15

T;T;T

Polyphen

1.0

D;D;.

Vest4

0.75

MutPred

0.87

Loss of helix (P = 0.028);Loss of helix (P = 0.028);Loss of helix (P = 0.028);

MVP

0.91

MPC

0.89

ClinPred

0.81

GERP RS

4.4

Varity_R

0.29

gMVP

0.67

Mutation Taster

=51/49

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.20

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.20

Position offset: 5

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