17-75840317-G-C

Variant names:

• chr17-75840317-G-C
• rs121434352
• NM_199242.3:c.766C>G

Variant summary

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

The NM_199242.3(UNC13D):​c.766C>G​(p.Arg256Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000026 in 1,613,708 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000039 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000025 (0 hom.)
• Consequence: UNC13D NM_199242.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.01
• Publications: 9 publications found

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 Gene-Disease associations (from GenCC):

• familial hemophagocytic lymphohistiocytosis 3

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Laboratory for Molecular Medicine, ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• hereditary hemophagocytic lymphohistiocytosis

  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 (MetaRNN=0.13235748).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_199242.3. 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
	UNC13D	NM_199242.3	MANE Select	c.766C>G	p.Arg256Gly	missense	Exon 10 of 32	NP_954712.1	Q70J99-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	UNC13D	ENST00000207549.9	TSL:1 MANE Select	c.766C>G	p.Arg256Gly	missense	Exon 10 of 32	ENSP00000207549.3	Q70J99-1
	UNC13D	ENST00000412096.6	TSL:2	c.766C>G	p.Arg256Gly	missense	Exon 10 of 33	ENSP00000388093.1	Q70J99-3
	UNC13D	ENST00000868100.1		c.766C>G	p.Arg256Gly	missense	Exon 11 of 33	ENSP00000538159.1

Frequencies

GnomAD3 genomes AF: 0.0000394 AC: 6 AN: 152150 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000735

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000240 AC: 6 AN: 249946 AF XY: 0.0000369

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000444

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000246 AC: 36 AN: 1461440 Hom.: 0 Cov.: 34 AF XY: 0.0000275 AC XY: 20 AN XY: 727012

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

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

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

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86246

European-Finnish (FIN) AF: 0.0000188 AC: 1 AN: 53156

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5642

European-Non Finnish (NFE) AF: 0.0000270 AC: 30 AN: 1111988

Other (OTH) AF: 0.0000662 AC: 4 AN: 60382

GnomAD4 genome AF: 0.0000394 AC: 6 AN: 152268 Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3 AN XY: 74460

African (AFR) AF: 0.0000241 AC: 1 AN: 41542

American (AMR) AF: 0.00 AC: 0 AN: 15300

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5176

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000735 AC: 5 AN: 68012

Other (OTH) AF: 0.00 AC: 0 AN: 2110

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000151

ExAC AF: 0.0000494 AC: 6

EpiCase AF: 0.000109

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Familial hemophagocytic lymphohistiocytosis 3 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.070	T
Eigen	Benign	-0.064
Eigen_PC	Benign	0.0026
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Uncertain	0.88	D
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.55	N
PhyloP100		3.0
PrimateAI	Benign	0.38	T
PROVEAN	Benign	3.2	N
REVEL	Benign	0.085
Sift	Benign	0.47	T
Sift4G	Benign	0.34	T
Polyphen		0.89	P
Vest4		0.38
MutPred		0.45		Loss of sheet (P = 0.0315)
MVP		0.56
MPC		0.17
ClinPred		0.17	T
GERP RS		3.4
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.6
Varity_R		0.094
gMVP		0.18
Mutation Taster		=94/6	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: rs121434352; hg19: chr17-73836398;