chr9-35243321-C-A

Variant names:

• chr9-35243321-C-A
• rs758019684
• NM_001371189.2:c.425C>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001371189.2(UNC13B):​c.425C>A​(p.Thr142Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,613,138 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: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: UNC13B NM_001371189.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.33
• Publications: 0 publications found

Genes affected

UNC13B (HGNC:12566): (unc-13 homolog B) This gene is expressed in the kidney cortical epithelial cells and is upregulated by hyperglycemia. The encoded protein shares a high level of similarity to the rat homolog, and contains 3 C2 domains and a diacylglycerol-binding C1 domain. Hyperglycemia increases the levels of diacylglycerol, which has been shown to induce apoptosis in cells transfected with this gene and thus contribute to the renal cell complications of hyperglycemia. Studies in other species also indicate a role for this protein in the priming step of synaptic vesicle exocytosis. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3683891).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001371189.2. 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
	UNC13B	NM_001371189.2	MANE Select	c.425C>A	p.Thr142Asn	missense	Exon 6 of 40	NP_001358118.1	A0A1B0GUS7
	UNC13B	NM_001330653.3		c.425C>A	p.Thr142Asn	missense	Exon 6 of 40	NP_001317582.1	O14795-2
	UNC13B	NM_001387551.1		c.425C>A	p.Thr142Asn	missense	Exon 6 of 40	NP_001374480.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	UNC13B	ENST00000635942.2	TSL:5 MANE Select	c.425C>A	p.Thr142Asn	missense	Exon 6 of 40	ENSP00000490228.1	A0A1B0GUS7
	UNC13B	ENST00000619578.4	TSL:1	c.425C>A	p.Thr142Asn	missense	Exon 6 of 40	ENSP00000479261.1	O14795-2
	UNC13B	ENST00000378495.7	TSL:1	c.425C>A	p.Thr142Asn	missense	Exon 6 of 39	ENSP00000367756.3	O14795-1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151868 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000657

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: 0.00

GnomAD2 exomes AF: 0.00000796 AC: 2 AN: 251196 AF XY: 0.00000737

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000579

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461270 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 726940

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33448

American (AMR) AF: 0.0000448 AC: 2 AN: 44670

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26110

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

South Asian (SAS) AF: 0.00 AC: 0 AN: 86222

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111580

Other (OTH) AF: 0.00 AC: 0 AN: 60372

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151868 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74172

African (AFR) AF: 0.00 AC: 0 AN: 41314

American (AMR) AF: 0.0000657 AC: 1 AN: 15220

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5178

South Asian (SAS) AF: 0.00 AC: 0 AN: 4816

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10582

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67978

Other (OTH) AF: 0.00 AC: 0 AN: 2086

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.099	T
BayesDel_noAF	Benign	-0.20
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.029	T
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.92	D
M_CAP	Benign	0.032	D
MetaRNN	Benign	0.37	T
MetaSVM	Benign	-0.38	T
MutationAssessor	Uncertain	2.3	M
PhyloP100		7.3
PrimateAI	Uncertain	0.64	T
PROVEAN	Benign	-0.95	N
REVEL	Benign	0.17
Sift	Uncertain	0.013	D
Sift4G	Benign	0.14	T
Polyphen		0.98	D
Vest4		0.65
MutPred		0.31		Loss of helix (P = 0.0138)
MVP		0.71
MPC		0.28
ClinPred		0.61	D
GERP RS		4.5
Varity_R		0.20
gMVP		0.51
Mutation Taster		=31/69	disease causing

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: rs758019684; hg19: chr9-35243318;