17-75830089-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBS1_Supporting

The NM_199242.3(UNC13D):c.2893G>A(p.Ala965Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00103 in 1,580,788 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00057 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0011 ( 0 hom. )

Consequence

UNC13D
NM_199242.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 1.94

Variant links:

Genes affected

UNC13D (HGNC:23147): (unc-13 homolog D) This gene encodes a protein that is a member of the UNC13 family, containing similar domain structure as other family members but lacking an N-terminal phorbol ester-binding C1 domain present in other Munc13 proteins. The protein appears to play a role in vesicle maturation during exocytosis and is involved in regulation of cytolytic granules secretion. Mutations in this gene are associated with familial hemophagocytic lymphohistiocytosis type 3, a genetically heterogeneous, rare autosomal recessive disorder. [provided by RefSeq, Jul 2008]

UNC13D links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.017514974).

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000571 (87/152284) while in subpopulation NFE AF= 0.00112 (76/68036). AF 95% confidence interval is 0.000915. There are 0 homozygotes in gnomad4. There are 38 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
UNC13D	NM_199242.3 link	c.2893G>A	p.Ala965Thr	missense_variant	Exon 30 of 32	ENST00000207549.9	NP_954712.1	Q70J99-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
UNC13D	ENST00000207549.9 link	c.2893G>A	p.Ala965Thr	missense_variant	Exon 30 of 32	1	NM_199242.3	ENSP00000207549.3		Q70J99-1

Frequencies

GnomAD3 genomes

AF:

0.000572

AC:

AN:

152166

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.00112

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000473

AC:

AN:

194524

Hom.:

AF XY:

0.000490

AC XY:

AN XY:

104142

show subpopulations

Gnomad AFR exome

AF:

0.000258

Gnomad AMR exome

AF:

0.0000707

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00100

Gnomad OTH exome

AF:

0.000594

GnomAD4 exome

AF:

0.00108

AC:

1549

AN:

1428504

Hom.:

Cov.:

AF XY:

0.00107

AC XY:

756

AN XY:

707284

show subpopulations

Gnomad4 AFR exome

AF:

0.000213

Gnomad4 AMR exome

AF:

0.000102

Gnomad4 ASJ exome

AF:

0.0000394

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00136

Gnomad4 OTH exome

AF:

0.000777

GnomAD4 genome

AF:

0.000571

AC:

AN:

152284

Hom.:

Cov.:

AF XY:

0.000510

AC XY:

AN XY:

74460

show subpopulations

Gnomad4 AFR

AF:

0.000144

Gnomad4 AMR

AF:

0.000261

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00112

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000691

Hom.:

Bravo

AF:

0.000570

TwinsUK

AF:

0.00135

AC:

ALSPAC

AF:

0.00208

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.00105

AC:

ExAC

AF:

0.000283

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Familial hemophagocytic lymphohistiocytosis 3

Uncertain:3

Aug 31, 2021

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 01, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 965 of the UNC13D protein (p.Ala965Thr). This variant is present in population databases (rs144744401, gnomAD 0.1%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with UNC13D-related conditions. ClinVar contains an entry for this variant (Variation ID: 582747). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt UNC13D protein function. 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. -

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.088

BayesDel_addAF

Benign

-0.53

BayesDel_noAF

Benign

-0.55

CADD

Benign

DANN

Benign

0.96

DEOGEN2

Benign

0.067

T;.

Eigen

Benign

-0.48

Eigen_PC

Benign

-0.30

FATHMM_MKL

Benign

0.62

LIST_S2

Benign

0.73

T;T

M_CAP

Benign

0.030

MetaRNN

Benign

0.018

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-1.1

N;N

PrimateAI

Benign

0.43

PROVEAN

Benign

-0.18

N;N

REVEL

Benign

0.086

Sift

Benign

0.24

T;T

Sift4G

Benign

0.45

T;T

Polyphen

0.031

B;.

Vest4

0.13

MVP

0.69

MPC

0.097

ClinPred

0.010

GERP RS

4.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

Varity_R

0.050

gMVP

0.22

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over