GNS p.Pro66Pro

Variant names:

• chr12-64752751-G-G
• NM_002076.4:c.

Your query was ambiguous. Multiple possible variants found:

• chr12-64752752--
• chr12-64752752-C-A
• chr12-64752752-C-G
• chr12-64752752-C-T

Variant summary

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

The NM_002076.4(GNS):​c. variant causes a exon region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: GNS NM_002076.4 exon_region
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.442
• Publications: 0 publications found

Genes affected

GNS (HGNC:4422): (glucosamine (N-acetyl)-6-sulfatase) The product of this gene is a lysosomal enzyme found in all cells. It is involved in the catabolism of heparin, heparan sulphate, and keratan sulphate. Deficiency of this enzyme results in the accumulation of undegraded substrate and the lysosomal storage disorder mucopolysaccharidosis type IIID (Sanfilippo D syndrome). Mucopolysaccharidosis type IIID is the least common of the four subtypes of Sanfilippo syndrome. [provided by RefSeq, Jul 2008]

GNS Gene-Disease associations (from GenCC):

• mucopolysaccharidosis type 3D

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P, ClinGen, Genomics England PanelApp

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_002076.4. 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
	GNS	NM_002076.4	MANE Select	c.		exon_region	Exon 2 of 14	NP_002067.1	P15586-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GNS	ENST00000258145.8	TSL:1 MANE Select	c.		exon_region	Exon 2 of 14	ENSP00000258145.3	P15586-1
	GNS	ENST00000418919.6	TSL:1	c.		exon_region	Exon 1 of 13	ENSP00000413130.2	H7C3P4
	GNS	ENST00000967913.1		c.		exon_region	Exon 2 of 14	ENSP00000637972.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 22

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.44

Splicing

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

hg19: chr12-65146531;