Genetic Variant BBS9:p.Thr12Pro (chr7-33146286-A-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_198428.3(BBS9):c.34A>C(p.Thr12Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,712 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T12A) has been classified as Benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

BBS9
NM_198428.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.46

Publications

6 publications found

Variant links:

Genes affected

BBS9 (HGNC:30000): (Bardet-Biedl syndrome 9) This gene is downregulated by parathyroid hormone in osteoblastic cells, and therefore is thought to be involved in parathyroid hormone action in bones. The exact function of this gene has not yet been determined. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jan 2017]

BBS9 Gene-Disease associations (from GenCC):

Bardet-Biedl syndrome 9
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
ciliopathy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Bardet-Biedl syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

BBS9 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

PM2

Very rare variant in population databases, with high coverage;

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_198428.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
BBS9	NM_198428.3	MANE Select	c.34A>C	p.Thr12Pro	missense	Exon 2 of 23	NP_940820.1
BBS9	NM_001348041.4		c.34A>C	p.Thr12Pro	missense	Exon 2 of 23	NP_001334970.1
BBS9	NM_001348036.1		c.34A>C	p.Thr12Pro	missense	Exon 2 of 23	NP_001334965.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
BBS9	ENST00000242067.11	TSL:1 MANE Select	c.34A>C	p.Thr12Pro	missense	Exon 2 of 23	ENSP00000242067.6
BBS9	ENST00000433714.5	TSL:1	n.34A>C		non_coding_transcript_exon	Exon 2 of 24	ENSP00000412159.1
BBS9	ENST00000671871.1		c.34A>C	p.Thr12Pro	missense	Exon 2 of 24	ENSP00000499908.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461712

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727178

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1111868

Other (OTH)

AF:

0.00

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.48

BayesDel_addAF

Pathogenic

0.20

BayesDel_noAF

Uncertain

0.050

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.25

Eigen

Uncertain

0.41

Eigen_PC

Uncertain

0.34

FATHMM_MKL

Uncertain

0.82

LIST_S2

Uncertain

0.95

M_CAP

Uncertain

0.15

MetaRNN

Uncertain

0.56

MetaSVM

Uncertain

0.20

MutationAssessor

Uncertain

2.5

PhyloP100

2.5

PrimateAI

Benign

0.47

PROVEAN

Uncertain

-4.3

REVEL

Pathogenic

0.67

Sift

Uncertain

0.0040

Sift4G

Uncertain

0.013

Polyphen

0.99

Vest4

0.52

MutPred

0.38

Loss of helix (P = 0.028)

MVP

0.92

MPC

0.43

ClinPred

0.99

GERP RS

2.8

PromoterAI

0.024

Neutral

(source)

Varity_R

0.90

gMVP

0.76

Mutation Taster

=89/11

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over