chr20-2430472-T-C

Position:

• chr20-2430472-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_198994.3(TGM6):​c.1705T>C​(p.Tyr569His) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TGM6 NM_198994.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.74

Genes affected

TGM6 (HGNC:16255): (transglutaminase 6) The protein encoded by this gene belongs to the transglutaminase superfamily. It catalyzes the cross-linking of proteins and the conjugation of polyamines to proteins. Mutations in this gene are associated with spinocerebellar ataxia type 35 (SCA35). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.872

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TGM6	NM_198994.3	c.1705T>C	p.Tyr569His	missense_variant	11/13	ENST00000202625.7	NP_945345.2
TGM6	NM_001254734.2	c.1705T>C	p.Tyr569His	missense_variant	11/12		NP_001241663.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TGM6	ENST00000202625.7	c.1705T>C	p.Tyr569His	missense_variant	11/13	1	NM_198994.3	ENSP00000202625	P1
TGM6	ENST00000381423.1	c.1705T>C	p.Tyr569His	missense_variant	11/12	1		ENSP00000370831

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.37
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.20
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.067	T;.
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.74
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Benign	0.69	T;T
M_CAP	Benign	0.041	D
MetaRNN	Pathogenic	0.87	D;D
MetaSVM	Uncertain	0.23	D
MutationAssessor	Pathogenic	3.1	M;M
MutationTaster	Benign	0.96	D;D
PrimateAI	Uncertain	0.63	T
PROVEAN	Uncertain	-4.3	D;D
REVEL	Pathogenic	0.66
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.81
MutPred		0.67		Loss of catalytic residue at Y569 (P = 0.0058);Loss of catalytic residue at Y569 (P = 0.0058);
MVP		0.83
MPC		0.52
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.73
gMVP		0.56

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs142406714; hg19: chr20-2411118;