NM_024685.4:c.752C>A

Variant names:

• chr12-76347233-G-T
• rs149760791
• NM_024685.4:c.752C>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP2

The NM_024685.4(BBS10):​c.752C>A​(p.Ala251Glu) variant causes a missense change. The variant allele was found at a frequency of 0.000000685 in 1,460,254 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A251V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: BBS10 NM_024685.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.35
• Publications: 0 publications found

Genes affected

BBS10 (HGNC:26291): (Bardet-Biedl syndrome 10) This gene is a member of the Bardet-Biedl syndrome (BBS) gene family. Bardet-Biedl syndrome is an autosomal recessive disorder characterized by progressive retinal degeneration, 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 is likely not a ciliary protein but rather has distant sequence homology to type II chaperonins. As a molecular chaperone, this protein may affect the folding or stability of other ciliary or basal body proteins. Inhibition of this protein's expression impairs ciliogenesis in preadipocytes. Mutations in this gene cause Bardet-Biedl syndrome type 10. [provided by RefSeq, Jan 2010]

BBS10 Gene-Disease associations (from GenCC):

• Bardet-Biedl syndrome 10

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp, Myriad Women’s Health
• BBS10-related ciliopathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Bardet-Biedl syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000306428 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 24 curated pathogenic missense variants (we use a threshold of 10). The gene has 5 curated benign missense variants. Trascript score misZ: 0.43507 (below the threshold of 3.09). GenCC associations: The gene is linked to Bardet-Biedl syndrome 10, ciliopathy, Bardet-Biedl syndrome.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_024685.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BBS10	NM_024685.4	MANE Select	c.752C>A	p.Ala251Glu	missense	Exon 2 of 2	NP_078961.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BBS10	ENST00000650064.2	MANE Select	c.752C>A	p.Ala251Glu	missense	Exon 2 of 2	ENSP00000497413.1	Q8TAM1
	BBS10	ENST00000865227.1		c.665C>A	p.Ala222Glu	missense	Exon 2 of 2	ENSP00000535286.1
	ENSG00000306428	ENST00000818399.1		n.251G>T		non_coding_transcript_exon	Exon 3 of 3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460254 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 726482

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51846

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111980

Other (OTH) AF: 0.0000166 AC: 1 AN: 60382

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Bardet-Biedl syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Uncertain	0.056	T
BayesDel_noAF	Benign	-0.16
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.39	T
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.71	T
M_CAP	Benign	0.053	D
MetaRNN	Uncertain	0.63	D
MetaSVM	Uncertain	0.12	D
MutationAssessor	Uncertain	2.8	M
PhyloP100		4.3
PrimateAI	Benign	0.45	T
PROVEAN	Benign	-0.86	N
REVEL	Uncertain	0.42
Sift	Benign	0.048	D
Sift4G	Uncertain	0.0060	D
Polyphen		1.0	D
Vest4		0.31
MutPred		0.44		Gain of catalytic residue at R256 (P = 0.0022)
MVP		0.84
MPC		0.35
ClinPred		0.92	D
GERP RS		3.3
Varity_R		0.19
gMVP		0.39
Mutation Taster		=75/25	polymorphism

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

Other links and lift over

dbSNP: rs149760791; hg19: chr12-76741013;