chr17-42543444-G-T

Position:

• chr17-42543444-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000263.4(NAGLU):​c.1438G>T​(p.Ala480Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000692 in 1,445,278 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 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. A480T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: NAGLU NM_000263.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.190

Genes affected

NAGLU (HGNC:7632): (N-acetyl-alpha-glucosaminidase) This gene encodes an enzyme that degrades heparan sulfate by hydrolysis of terminal N-acetyl-D-glucosamine residues in N-acetyl-alpha-D-glucosaminides. Defects in this gene are the cause of mucopolysaccharidosis type IIIB (MPS-IIIB), also known as Sanfilippo syndrome B. This disease is characterized by the lysosomal accumulation and urinary excretion of heparan sulfate. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14257166).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NAGLU	NM_000263.4	c.1438G>T	p.Ala480Ser	missense_variant	6/6	ENST00000225927.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NAGLU	ENST00000225927.7	c.1438G>T	p.Ala480Ser	missense_variant	6/6	1	NM_000263.4	P1
NAGLU	ENST00000591587.1	c.*407G>T		3_prime_UTR_variant	4/4	5
NAGLU	ENST00000592454.1	c.*281G>T		3_prime_UTR_variant	2/2	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.92e-7 AC: 1 AN: 1445278 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 718098

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.05e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.082
BayesDel_addAF	Benign	-0.026	T
BayesDel_noAF	Benign	-0.28
CADD	Benign	0.67
DANN	Benign	0.52
DEOGEN2	Uncertain	0.56	D
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.18	N
LIST_S2	Benign	0.28	T
M_CAP	Uncertain	0.10	D
MetaRNN	Benign	0.14	T
MetaSVM	Uncertain	0.40	D
MutationAssessor	Benign	1.0	L
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.27	T
PROVEAN	Benign	0.21	N
REVEL	Benign	0.23
Sift	Benign	0.86	T
Sift4G	Benign	0.74	T
Polyphen		0.017	B
Vest4		0.065
MutPred		0.45		Loss of helix (P = 0.0237);
MVP		0.61
MPC		0.34
ClinPred		0.041	T
GERP RS		-0.77
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.059
gMVP		0.33

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

Other links and lift over

dbSNP: rs147293270; hg19: chr17-40695462;