chr17-42538691-C-G

Variant names:

• chr17-42538691-C-G
• rs104894601
• NM_000263.4:c.700C>G
• NAGLU p.Arg234Gly

Variant summary

Our verdict is

Pathogenic

>+14 Pathogenic

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

. The variant received 18 ACMG points: 18P and 0B. PM1PM2PM5PP3_StrongPP5_Very_Strong

The NM_000263.4(NAGLU):​c.700C>G​(p.Arg234Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R234L) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: NAGLU NM_000263.4 missense
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 3.88
• Publications: 14 publications found

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]

NAGLU Gene-Disease associations (from GenCC):

• mucopolysaccharidosis type 3B

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp, PanelApp Australia, Orphanet, Myriad Women's Health, ClinGen
• Charcot-Marie-Tooth disease axonal type 2V

  Inheritance: AD Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, PanelApp Australia, Labcorp Genetics (formerly Invitae)

ENSG00000266929 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PM1: In a helix (size 19) in uniprot entity ANAG_HUMAN there are 6 pathogenic changes around while only 0 benign (100%) in NM_000263.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr17-42538692-G-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 859690.
• PP3: REVEL computational evidence supports a deleterious effect, 0.938
• PP5: Variant 17-42538691-C-G is Pathogenic according to our data. Variant chr17-42538691-C-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 1013390.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000263.4. 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
	NAGLU	NM_000263.4	MANE Select	c.700C>G	p.Arg234Gly	missense	Exon 4 of 6	NP_000254.2	A0A140VJE4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NAGLU	ENST00000225927.7	TSL:1 MANE Select	c.700C>G	p.Arg234Gly	missense	Exon 4 of 6	ENSP00000225927.1	P54802
	NAGLU	ENST00000963429.1		c.778C>G	p.Arg260Gly	missense	Exon 4 of 6	ENSP00000633488.1
	NAGLU	ENST00000904921.1		c.757C>G	p.Arg253Gly	missense	Exon 5 of 7	ENSP00000574980.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
1	-	-	Mucopolysaccharidosis, MPS-III-B;C5569050:Charcot-Marie-Tooth disease axonal type 2V (1)
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.57
BayesDel_addAF	Pathogenic	0.44	D
BayesDel_noAF	Pathogenic	0.39
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.99	D
Eigen	Pathogenic	0.78
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.86	D
M_CAP	Pathogenic	0.49	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	3.5	H
PhyloP100		3.9
PrimateAI	Uncertain	0.56	T
PROVEAN	Pathogenic	-6.0	D
REVEL	Pathogenic	0.94
Sift	Benign	0.053	T
Sift4G	Uncertain	0.016	D
Varity_R		0.92
gMVP		0.96

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs104894601;

hg19: chr17-40690709;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline