7-65960907-A-C

Position:

• chr7-65960907-A-C

Variant summary

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

The NM_000181.4(GUSB):​c.1946T>G​(p.Leu649Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 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. L649P) has been classified as Benign.

• Frequency: Genomes: not found (cov: 30)
• Consequence: GUSB NM_000181.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.232

Genes affected

GUSB (HGNC:4696): (glucuronidase beta) This gene encodes a hydrolase that degrades glycosaminoglycans, including heparan sulfate, dermatan sulfate, and chondroitin-4,6-sulfate. The enzyme forms a homotetramer that is localized to the lysosome. Mutations in this gene result in mucopolysaccharidosis type VII. Alternative splicing results in multiple transcript variants. There are many pseudogenes of this locus in the human genome.[provided by RefSeq, May 2014]

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=0.13165465).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GUSB	NM_000181.4	c.1946T>G	p.Leu649Arg	missense_variant	12/12	ENST00000304895.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GUSB	ENST00000304895.9	c.1946T>G	p.Leu649Arg	missense_variant	12/12	1	NM_000181.4	P1

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 38

GnomAD4 genome Cov.: 30

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.062
BayesDel_addAF	Uncertain	0.021	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	5.9
DANN	Benign	0.84
DEOGEN2	Benign	0.13	T;.
Eigen	Benign	-0.97
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.18	N
LIST_S2	Benign	0.38	T;T
M_CAP	Pathogenic	0.32	D
MetaRNN	Benign	0.13	T;T
MetaSVM	Uncertain	0.24	D
MutationAssessor	Benign	0.0	N;.
MutationTaster	Benign	1.0	P;P;P
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-0.17	N;N
REVEL	Benign	0.25
Sift	Benign	0.066	T;T
Sift4G	Benign	0.073	T;T
Polyphen		0.087	B;.
Vest4		0.060
MutPred		0.24		Loss of stability (P = 0.0038);.;
MVP		0.82
MPC		0.60
ClinPred		0.11	T
GERP RS		-0.066
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.058
gMVP		0.35

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: rs9530; hg19: chr7-65425894;