17-19343828-G-A

Variant names:

• chr17-19343828-G-A
• rs765607415
• NM_015681.6:c.434C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_015681.6(B9D1):​c.434C>T​(p.Thr145Ile) variant causes a missense change. The variant allele was found at a frequency of 0.00000753 in 1,461,788 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000075 (0 hom.)
• Consequence: B9D1 NM_015681.6 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 4.77
• Publications: 1 publications found

Genes affected

B9D1 (HGNC:24123): (B9 domain containing 1) This gene encodes a B9 domain-containing protein, one of several that are involved in ciliogenesis. Alterations in expression of this gene have been found in a family with Meckel syndrome. Meckel syndrome has been associated with at least six different genes. This gene is located within the Smith-Magenis syndrome region on chromosome 17. [provided by RefSeq, Mar 2016]

B9D1 Gene-Disease associations (from GenCC):

• ciliopathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Joubert syndrome 27

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Meckel syndrome, type 9

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Genomics England PanelApp, G2P
• Joubert syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Meckel syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (REVEL=0.078).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015681.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	B9D1	NM_015681.6	MANE Select	c.434C>T	p.Thr145Ile	missense	Exon 6 of 7	NP_056496.1
	B9D1	NM_001321214.2		c.434C>T	p.Thr145Ile	missense	Exon 6 of 7	NP_001308143.1
	B9D1	NM_001321217.2		c.434C>T	p.Thr145Ile	missense	Exon 6 of 7	NP_001308146.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	B9D1	ENST00000261499.11	TSL:1 MANE Select	c.434C>T	p.Thr145Ile	missense	Exon 6 of 7	ENSP00000261499.4
	B9D1	ENST00000674596.1		c.259C>T	p.Gln87*	stop_gained	Exon 6 of 8	ENSP00000501877.1
	B9D1	ENST00000663089.1		c.497C>T	p.Thr166Ile	missense	Exon 7 of 7	ENSP00000499469.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.0000119 AC: 3 AN: 251288 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000753 AC: 11 AN: 1461788 Hom.: 0 Cov.: 35 AF XY: 0.00000550 AC XY: 4 AN XY: 727214

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

American (AMR) AF: 0.0000224 AC: 1 AN: 44712

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53410

Middle Eastern (MID) AF: 0.000347 AC: 2 AN: 5760

European-Non Finnish (NFE) AF: 0.00000719 AC: 8 AN: 1111954

Other (OTH) AF: 0.00 AC: 0 AN: 60390

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000936 Hom.: 0

Bravo AF: 0.0000453

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.00

EpiControl AF: 0.000119

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Meckel-Gruber syndrome;C0431399:Joubert syndrome (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.37
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	20
DANN	Uncertain	0.99
Eigen	Benign	-0.39
Eigen_PC	Benign	-0.20
FATHMM_MKL	Uncertain	0.93	D
PhyloP100		4.8
Vest4		0.33
ClinPred		0.20	T
GERP RS		3.7
Varity_R		0.12
Mutation Taster		=14/186	disease causing

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

Other links and lift over

dbSNP: rs765607415; hg19: chr17-19247141;