rs4789773

Variant names:

• chr17-82433808-A-C
• rs4789773
• NM_001330542.2:c.433A>C

Your query was ambiguous. Multiple possible variants found:

• chr17-82433808-A-C
• chr17-82433808-A-G
• chr17-82433808-A-T

Variant summary

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

The NM_001330542.2(HEXD):​c.433A>C​(p.Ile145Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 13/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I145V) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: HEXD NM_001330542.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0800
• Publications: 43 publications found

Genes affected

HEXD (HGNC:26307): (hexosaminidase D) Enables beta-N-acetylhexosaminidase activity. Predicted to be involved in carbohydrate metabolic process. Located in extracellular vesicle. [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_001330542.2. 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
	HEXD	NM_001330542.2	MANE Select	c.433A>C	p.Ile145Leu	missense	Exon 5 of 13	NP_001317471.1	Q8WVB3-1
	HEXD	NM_173620.3		c.433A>C	p.Ile145Leu	missense	Exon 5 of 12	NP_775891.2	Q8WVB3-2
	HEXD	NM_001369487.1		c.157A>C	p.Ile53Leu	missense	Exon 6 of 15	NP_001356416.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HEXD	ENST00000327949.15	TSL:1 MANE Select	c.433A>C	p.Ile145Leu	missense	Exon 5 of 13	ENSP00000332634.9	Q8WVB3-1
	HEXD	ENST00000337014.10	TSL:1	c.433A>C	p.Ile145Leu	missense	Exon 5 of 12	ENSP00000337854.6	Q8WVB3-2
	HEXD	ENST00000577944.5	TSL:5	c.433A>C	p.Ile145Leu	missense	Exon 5 of 13	ENSP00000463129.1	J3QKL0

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000407 AC: 1 AN: 245678 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000295

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 Data not reliable, filtered out with message: AS_VQSR AF: 6.85e-7 AC: 1 AN: 1459856 Hom.: 0 Cov.: 36 AF XY: 0.00 AC XY: 0 AN XY: 726202

African (AFR) AF: 0.00 AC: 0 AN: 33378

American (AMR) AF: 0.0000224 AC: 1 AN: 44578

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26096

East Asian (EAS) AF: 0.00 AC: 0 AN: 39562

South Asian (SAS) AF: 0.00 AC: 0 AN: 86048

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52724

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111372

Other (OTH) AF: 0.00 AC: 0 AN: 60338

GnomAD4 genome Cov.: 33

ExAC AF: 0.00000828 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	0.0058	T
BayesDel_noAF	Benign	-0.15
CADD	Benign	1.2
DANN	Benign	0.88
Eigen	Benign	-0.65
Eigen_PC	Benign	-0.69
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.81	T
M_CAP	Benign	0.079	D
MetaRNN	Uncertain	0.73	D
MetaSVM	Uncertain	0.19	D
PhyloP100		0.080
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-1.9	N
REVEL	Uncertain	0.54
Sift	Benign	0.084	T
Sift4G	Uncertain	0.059	T
Vest4		0.38
MutPred		0.76		Loss of catalytic residue at I145 (P = 0.0322)
MVP		0.57
MPC		0.28
ClinPred		0.11	T
GERP RS		0.036
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.64

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: rs4789773; hg19: chr17-80391684;