NM_000263.4:c.1860C>G

Variant names:

• chr17-42543866-C-G
• NM_000263.4:c.1860C>G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000263.4(NAGLU):​c.1860C>G​(p.Ser620Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000138 in 1,450,726 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. Synonymous variant affecting the same amino acid position (i.e. S620S) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: NAGLU NM_000263.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.476

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]

ENSG00000266929 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3359806).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NAGLU	NM_000263.4	c.1860C>G	p.Ser620Arg	missense_variant	Exon 6 of 6	ENST00000225927.7	NP_000254.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NAGLU	ENST00000225927.7	c.1860C>G	p.Ser620Arg	missense_variant	Exon 6 of 6	1	NM_000263.4	ENSP00000225927.1
NAGLU	ENST00000591587.1	c.*829C>G		3_prime_UTR_variant	Exon 4 of 4	5		ENSP00000467836.1
ENSG00000266929	ENST00000585572.1	n.379+5111C>G		intron_variant	Intron 3 of 4	4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000138 AC: 2 AN: 1450726 Hom.: 0 Cov.: 32 AF XY: 0.00000139 AC XY: 1 AN XY: 720868

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.0038	T
BayesDel_noAF	Benign	-0.24
CADD	Benign	13
DANN	Benign	0.95
DEOGEN2	Uncertain	0.57	D
Eigen	Benign	-0.78
Eigen_PC	Benign	-0.61
FATHMM_MKL	Benign	0.69	D
LIST_S2	Benign	0.61	T
M_CAP	Benign	0.049	D
MetaRNN	Benign	0.34	T
MetaSVM	Uncertain	0.027	D
MutationAssessor	Benign	0.74	N
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-0.13	N
REVEL	Uncertain	0.29
Sift	Benign	0.35	T
Sift4G	Benign	0.63	T
Polyphen		0.0010	B
Vest4		0.089
MutPred		0.55		Gain of MoRF binding (P = 0.0673);
MVP		0.84
MPC		0.41
ClinPred		0.087	T
GERP RS		0.41
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.16
gMVP		0.13

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-40695884;