3-50320375-C-T

Variant names:

• chr3-50320375-C-T
• rs782718260
• NM_003773.5:c.115G>A

Variant summary

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

The NM_003773.5(HYAL2):​c.115G>A​(p.Ala39Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,460,622 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: HYAL2 NM_003773.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.80
• Publications: 0 publications found

Genes affected

HYAL2 (HGNC:5321): (hyaluronidase 2) This gene encodes a weak acid-active hyaluronidase. The encoded protein is similar in structure to other more active hyaluronidases. Hyaluronidases degrade hyaluronan, one of the major glycosaminoglycans of the extracellular matrix. Hyaluronan and fragments of hyaluronan are thought to be involved in cell proliferation, migration and differentiation. Although it was previously thought to be a lysosomal hyaluronidase that is active at a pH below 4, the encoded protein is likely a GPI-anchored cell surface protein. This hyaluronidase serves as a receptor for the oncogenic virus Jaagsiekte sheep retrovirus. The gene is one of several related genes in a region of chromosome 3p21.3 associated with tumor suppression. This gene encodes two alternatively spliced transcript variants which differ only in the 5' UTR.[provided by RefSeq, Mar 2010]

TUSC2 (HGNC:17034): (tumor suppressor 2, mitochondrial calcium regulator) Predicted to be involved in inflammatory response and regulation of mitochondrial membrane potential. Predicted to act upstream of or within several processes, including natural killer cell differentiation; neutrophil-mediated killing of gram-negative bacterium; and regulation of cytokine production. Predicted to be active in mitochondrion. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003773.5. 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
	HYAL2	NM_003773.5	MANE Select	c.115G>A	p.Ala39Thr	missense	Exon 2 of 4	NP_003764.3
	HYAL2	NM_033158.5		c.115G>A	p.Ala39Thr	missense	Exon 3 of 5	NP_149348.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HYAL2	ENST00000357750.9	TSL:1 MANE Select	c.115G>A	p.Ala39Thr	missense	Exon 2 of 4	ENSP00000350387.4	Q12891
	HYAL2	ENST00000395139.7	TSL:1	c.115G>A	p.Ala39Thr	missense	Exon 2 of 4	ENSP00000378571.3	Q12891
	HYAL2	ENST00000447092.5	TSL:1	c.115G>A	p.Ala39Thr	missense	Exon 1 of 3	ENSP00000401853.1	Q12891

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1460622 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726550

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.00 AC: 0 AN: 44666

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26092

East Asian (EAS) AF: 0.00 AC: 0 AN: 39686

South Asian (SAS) AF: 0.00 AC: 0 AN: 86188

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52918

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111476

Other (OTH) AF: 0.00 AC: 0 AN: 60356

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Uncertain	0.036	T
BayesDel_noAF	Benign	-0.19
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.34	T
Eigen	Uncertain	0.53
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.040	D
MetaRNN	Uncertain	0.67	D
MetaSVM	Benign	-0.30	T
MutationAssessor	Uncertain	2.1	M
PhyloP100		7.8
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-1.5	N
REVEL	Benign	0.22
Sift	Benign	0.089	T
Sift4G	Benign	0.23	T
Polyphen		0.90	P
Vest4		0.63
MutPred		0.51		Loss of catalytic residue at A39 (P = 0.0148)
MVP		0.84
MPC		1.2
ClinPred		0.96	D
GERP RS		5.2
Varity_R		0.17
gMVP		0.82
Mutation Taster		=65/35	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs782718260; hg19: chr3-50357806;