chr3-63912684-G-GGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCA

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP3

The NM_001377405.1(ATXN7):c.118_119insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC(p.Gln39_Pro40insGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGln) variant causes a disruptive inframe insertion change. The variant allele was found at a frequency of 0.0000207 in 144,718 control chromosomes in the GnomAD database, with no homozygous occurrence. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000021 ( 0 hom., cov: 23)

Exomes 𝑓: 0.0000011 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

ATXN7
NM_001377405.1 disruptive_inframe_insertion

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 4.10

Publications

0 publications found

Variant links:

Genes affected

ATXN7 (HGNC:10560): (ataxin 7) The autosomal dominant cerebellar ataxias (ADCA) are a heterogeneous group of neurodegenerative disorders characterized by progressive degeneration of the cerebellum, brain stem and spinal cord. Clinically, ADCA has been divided into three groups: ADCA types I-III. ADCAI is genetically heterogeneous, with five genetic loci, designated spinocerebellar ataxia (SCA) 1, 2, 3, 4 and 6, being assigned to five different chromosomes. ADCAII, which always presents with retinal degeneration (SCA7), and ADCAIII often referred to as the 'pure' cerebellar syndrome (SCA5), are most likely homogeneous disorders. Several SCA genes have been cloned and shown to contain CAG repeats in their coding regions. ADCA is caused by the expansion of the CAG repeats, producing an elongated polyglutamine tract in the corresponding protein. The expanded repeats are variable in size and unstable, usually increasing in size when transmitted to successive generations. This locus has been mapped to chromosome 3, and it has been determined that the diseased allele associated with spinocerebellar ataxia-7 contains 37-306 CAG repeats (near the N-terminus), compared to 4-35 in the normal allele. The encoded protein is a component of the SPT3/TAF9/GCN5 acetyltransferase (STAGA) and TBP-free TAF-containing (TFTC) chromatin remodeling complexes, and it thus plays a role in transcriptional regulation. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2016]

ATXN7 Gene-Disease associations (from GenCC):

spinocerebellar ataxia 7
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
spinocerebellar ataxia type 7
Inheritance: AD Classification: MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics

ATXN7 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

BP3

Nonframeshift variant in repetitive region in NM_001377405.1

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001377405.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ATXN7	NM_001377405.1	MANE Select	c.118_119insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC	p.Gln39_Pro40insGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGln	disruptive_inframe_insertion	Exon 3 of 13	NP_001364334.1	O15265-1
ATXN7	NM_001177387.1		c.118_119insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC	p.Gln39_Pro40insGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGln	disruptive_inframe_insertion	Exon 2 of 13	NP_001170858.1	O15265-2
ATXN7	NM_000333.4		c.118_119insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC	p.Gln39_Pro40insGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGln	disruptive_inframe_insertion	Exon 3 of 13	NP_000324.1	O15265-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ATXN7	ENST00000674280.1	MANE Select	c.118_119insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC	p.Gln39_Pro40insGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGln	disruptive_inframe_insertion	Exon 3 of 13	ENSP00000501377.1	O15265-1
ATXN7	ENST00000295900.10	TSL:1	c.118_119insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC	p.Gln39_Pro40insGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGln	disruptive_inframe_insertion	Exon 3 of 13	ENSP00000295900.6	O15265-1
ATXN7	ENST00000522345.2	TSL:2	c.118_119insAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGC	p.Gln39_Pro40insGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGlnGln	disruptive_inframe_insertion	Exon 1 of 12	ENSP00000428067.2	O15265-2

Frequencies

GnomAD3 genomes

AF:

0.0000207

AC:

AN:

144616

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000752

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000106

AC:

AN:

942434

Hom.:

Cov.:

AF XY:

0.00000224

AC XY:

AN XY:

446588

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

17716

American (AMR)

AF:

0.00

AC:

AN:

5282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

8402

East Asian (EAS)

AF:

0.00

AC:

AN:

9614

South Asian (SAS)

AF:

0.00

AC:

AN:

20022

European-Finnish (FIN)

AF:

0.0000530

AC:

AN:

18856

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2096

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

827342

Other (OTH)

AF:

0.00

AC:

AN:

33104

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.675

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000207

AC:

AN:

144718

Hom.:

Cov.:

AF XY:

0.0000142

AC XY:

AN XY:

70412

show subpopulations

African (AFR)

AF:

0.0000750

AC:

AN:

39998

American (AMR)

AF:

0.00

AC:

AN:

14702

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3374

East Asian (EAS)

AF:

0.00

AC:

AN:

4766

South Asian (SAS)

AF:

0.00

AC:

AN:

4708

European-Finnish (FIN)

AF:

0.00

AC:

AN:

8512

Middle Eastern (MID)

AF:

0.00

AC:

AN:

282

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

65440

Other (OTH)

AF:

0.00

AC:

AN:

2030

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.542

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

4.1

Mutation Taster

=68/32

polymorphism

(source)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over