17-75828014-C-A

Position:

chr17-75828014-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BS1_Supporting

The NM_199242.3(UNC13D):c.3224G>T(p.Arg1075Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000169 in 1,594,670 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

UNC13D
NM_199242.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 2.58

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 Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BS1

Variant frequency is greater than expected in population mid. gnomad4_exome allele frequency = 0.0000166 (24/1442318) while in subpopulation MID AF= 0.0011 (6/5448). AF 95% confidence interval is 0.000479. There are 0 homozygotes in gnomad4_exome. There are 12 alleles in male gnomad4_exome subpopulation. Median coverage is 31. 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/exons	MANE	Protein	UniProt
UNC13D	NM_199242.3 linkuse as main transcript	c.3224G>T	p.Arg1075Leu	missense_variant	32/32	ENST00000207549.9	NP_954712.1	Q70J99-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
UNC13D	ENST00000207549.9 linkuse as main transcript	c.3224G>T	p.Arg1075Leu	missense_variant	32/32	1	NM_199242.3	ENSP00000207549.3		Q70J99-1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152234

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000143

AC:

AN:

209066

Hom.:

AF XY:

0.0000263

AC XY:

AN XY:

114124

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000369

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000111

Gnomad OTH exome

AF:

0.000189

GnomAD4 exome

AF:

0.0000166

AC:

AN:

1442318

Hom.:

Cov.:

AF XY:

0.0000168

AC XY:

AN XY:

716206

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000239

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000145

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152352

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74492

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Familial hemophagocytic lymphohistiocytosis 3

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 26, 2022

This sequence change replaces arginine, which is basic and polar, with leucine, which is neutral and non-polar, at codon 1075 of the UNC13D protein (p.Arg1075Leu). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This missense change has been observed in individual(s) with primary immunodeficiency (PMID: 32135276). ClinVar contains an entry for this variant (Variation ID: 936314). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Not Available"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Not Available"). 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. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Jan 01, 2024

UNC13D: PM2, PP4 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Uncertain

0.078

BayesDel_noAF

Uncertain

-0.020

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.50

T;.

Eigen

Uncertain

0.45

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.90

D;D

M_CAP

Uncertain

0.16

MetaRNN

Uncertain

0.54

D;D

MetaSVM

Uncertain

-0.16

MutationAssessor

Uncertain

2.8

M;M

PrimateAI

Uncertain

0.53

PROVEAN

Uncertain

-3.6

D;D

REVEL

Uncertain

0.44

Sift

Uncertain

0.0030

D;D

Sift4G

Uncertain

0.0060

D;D

Polyphen

1.0

D;.

Vest4

0.39

MutPred

0.46

Loss of solvent accessibility (P = 0.0079);Loss of solvent accessibility (P = 0.0079);

MVP

0.81

MPC

0.37

ClinPred

0.93

GERP RS

4.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.28

gMVP

0.65

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