8-15623104-C-G

Position:

• chr8-15623104-C-G

Variant summary

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

The NM_006765.4(TUSC3):​c.163C>G​(p.Gln55Glu) variant causes a missense change involving the alteration of a 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: TUSC3 NM_006765.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.57

Genes affected

TUSC3 (HGNC:30242): (tumor suppressor candidate 3) This gene encodes a protein that has been associated with several biological functions including cellular magnesium uptake, protein glycosylation and embryonic development. This protein localizes to the endoplasmic reticulum and acts as a component of the oligosaccharyl transferase complex which is responsible for N-linked protein glycosylation. This gene is a candidate tumor suppressor gene. Homozygous mutations in this gene are associated with autosomal recessive nonsyndromic mental retardation-7 and in the proliferation and invasiveness of several cancers including metastatic pancreatic cancer, ovarian cancer and glioblastoma multiform. [provided by RefSeq, Oct 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TUSC3	NM_006765.4	c.163C>G	p.Gln55Glu	missense_variant	2/11	ENST00000503731.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TUSC3	ENST00000503731.6	c.163C>G	p.Gln55Glu	missense_variant	2/11	1	NM_006765.4	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Uncertain	0.052	T
BayesDel_noAF	Benign	-0.16
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.13	.;T;.;T;T
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;D;D;D;D
M_CAP	Benign	0.015	T
MetaRNN	Uncertain	0.53	D;D;D;D;D
MetaSVM	Benign	-0.99	T
MutationAssessor	Uncertain	2.1	M;.;.;M;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	-2.3	N;N;N;N;.
REVEL	Benign	0.17
Sift	Uncertain	0.012	D;D;D;D;.
Sift4G	Uncertain	0.022	D;D;D;D;D
Polyphen		0.81	P;P;P;P;.
Vest4		0.69
MutPred		0.47		Gain of disorder (P = 0.0512);Gain of disorder (P = 0.0512);Gain of disorder (P = 0.0512);Gain of disorder (P = 0.0512);.;
MVP		0.31
MPC		0.33
ClinPred		0.90	D
GERP RS		5.6
Varity_R		0.68
gMVP		0.69

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: rs387906804; hg19: chr8-15480613;