NM_001940.4:c.86C>G

Variant names:

• chr12-6934234-C-G
• rs371722337
• NM_001940.4:c.86C>G

Variant summary

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

The NM_001940.4(ATN1):​c.86C>G​(p.Ser29Trp) variant causes a missense change. The variant allele was found at a frequency of 0.000000696 in 1,437,006 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: ATN1 NM_001940.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.95

Genes affected

ATN1 (HGNC:3033): (atrophin 1) Dentatorubral pallidoluysian atrophy (DRPLA) is a rare neurodegenerative disorder characterized by cerebellar ataxia, myoclonic epilepsy, choreoathetosis, and dementia. The disorder is related to the expansion from 7-35 copies to 49-93 copies of a trinucleotide repeat (CAG/CAA) within this gene. The encoded protein includes a serine repeat and a region of alternating acidic and basic amino acids, as well as the variable glutamine repeat. Alternative splicing results in two transcripts variants that encode the same protein. [provided by RefSeq, Jul 2016]

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 rank	MANE	Protein	UniProt
ATN1	NM_001940.4	c.86C>G	p.Ser29Trp	missense_variant	Exon 3 of 10	ENST00000396684.3	NP_001931.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ATN1	ENST00000396684.3	c.86C>G	p.Ser29Trp	missense_variant	Exon 3 of 10	1	NM_001940.4	ENSP00000379915.2
ATN1	ENST00000356654.8	c.86C>G	p.Ser29Trp	missense_variant	Exon 3 of 10	1		ENSP00000349076.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.96e-7 AC: 1 AN: 1437006 Hom.: 0 Cov.: 32 AF XY: 0.00000140 AC XY: 1 AN XY: 714936

Gnomad4 AFR exome AF: 0.0000318

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.36
BayesDel_addAF	Uncertain	0.016	T
BayesDel_noAF	Benign	-0.21
CADD	Pathogenic	30
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.75	D;D
Eigen	Uncertain	0.53
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	.;D
M_CAP	Benign	0.079	D
MetaRNN	Uncertain	0.47	T;T
MetaSVM	Benign	-0.61	T
MutationAssessor	Benign	1.4	L;L
PrimateAI	Uncertain	0.71	T
PROVEAN	Uncertain	-4.4	D;D
REVEL	Benign	0.23
Sift	Pathogenic	0.0	D;D
Sift4G	Uncertain	0.0090	D;D
Polyphen		1.0	D;D
Vest4		0.47
MutPred		0.36		Gain of catalytic residue at L27 (P = 0);Gain of catalytic residue at L27 (P = 0);
MVP		0.35
MPC		0.46
ClinPred		0.99	D
GERP RS		3.8
Varity_R		0.51
gMVP		0.21

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: rs371722337; hg19: chr12-7043397;