dbSNP rs72466490: DCTN1:c.1288-3C>T (chr2-74370072-G-A) – ACMG Classification: Benign (-18 pts)

Variant summary

Our verdict is Benign. The variant received -18 ACMG points: 0P and 18B. BP4_ModerateBP6_Very_StrongBS1BS2

The NM_004082.5(DCTN1):c.1288-3C>T variant causes a splice region, intron change. The variant allele was found at a frequency of 0.00221 in 1,614,156 control chromosomes in the GnomAD database, including 74 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.012 ( 43 hom., cov: 32)

Exomes 𝑓: 0.0012 ( 31 hom. )

Consequence

DCTN1
NM_004082.5 splice_region, intron

Scores

Splicing: ADA: 0.05870

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: 4.72

Publications

2 publications found

Variant links:

Genes affected

DCTN1 (HGNC:2711): (dynactin subunit 1) This gene encodes the largest subunit of dynactin, a macromolecular complex consisting of 10 subunits ranging in size from 22 to 150 kD. Dynactin binds to both microtubules and cytoplasmic dynein. Dynactin is involved in a diverse array of cellular functions, including ER-to-Golgi transport, the centripetal movement of lysosomes and endosomes, spindle formation, chromosome movement, nuclear positioning, and axonogenesis. This subunit interacts with dynein intermediate chain by its domains directly binding to dynein and binds to microtubules via a highly conserved glycine-rich cytoskeleton-associated protein (CAP-Gly) domain in its N-terminus. Alternative splicing of this gene results in multiple transcript variants encoding distinct isoforms. Mutations in this gene cause distal hereditary motor neuronopathy type VIIB (HMN7B) which is also known as distal spinal and bulbar muscular atrophy (dSBMA). [provided by RefSeq, Oct 2008]

DCTN1 Gene-Disease associations (from GenCC):

amyotrophic lateral sclerosis type 1
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
neuronopathy, distal hereditary motor, type 7B
Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
Perry syndrome
Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
amyotrophic lateral sclerosis
Inheritance: AD Classification: MODERATE Submitted by: ClinGen
distal hereditary motor neuropathy type 7
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

DCTN1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -18 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.37).

BP6

Variant 2-74370072-G-A is Benign according to our data. Variant chr2-74370072-G-A is described in ClinVar as Benign. ClinVar VariationId is 259231.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.012 (1821/152294) while in subpopulation AFR AF = 0.0416 (1728/41560). AF 95% confidence interval is 0.0399. There are 43 homozygotes in GnomAd4. There are 851 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 1821 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004082.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
DCTN1	NM_004082.5	MANE Select	c.1288-3C>T	splice_region intron	N/A	NP_004073.2
DCTN1	NM_001190837.2		c.1267-3C>T	splice_region intron	N/A	NP_001177766.1	Q14203-6
DCTN1	NM_001378991.1		c.1237-3C>T	splice_region intron	N/A	NP_001365920.1	A0A7P0Z4C3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
DCTN1	ENST00000628224.3	TSL:5 MANE Select	c.1288-3C>T	splice_region intron	N/A	ENSP00000487279.2	Q14203-1
DCTN1	ENST00000361874.8	TSL:1	c.1288-3C>T	splice_region intron	N/A	ENSP00000354791.4	A0A804CDA6
DCTN1	ENST00000409567.7	TSL:1	c.1228-3C>T	splice_region intron	N/A	ENSP00000386843.3	Q14203-4

Frequencies

GnomAD3 genomes

AF:

0.0119

AC:

1813

AN:

152176

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0415

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00419

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00907

GnomAD2 exomes

AF:

0.00297

AC:

748

AN:

251482

AF XY:

0.00207

show subpopulations

Gnomad AFR exome

AF:

0.0413

Gnomad AMR exome

AF:

0.00173

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000791

Gnomad OTH exome

AF:

0.000977

GnomAD4 exome

AF:

0.00120

AC:

1751

AN:

1461862

Hom.:

Cov.:

AF XY:

0.00101

AC XY:

733

AN XY:

727240

show subpopulations

African (AFR)

AF:

0.0420

AC:

1405

AN:

33480

American (AMR)

AF:

0.00250

AC:

112

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000128

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53412

Middle Eastern (MID)

AF:

0.000867

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000405

AC:

AN:

1111990

Other (OTH)

AF:

0.00286

AC:

173

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

110

220

329

439

549

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

144

192

240

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0120

AC:

1821

AN:

152294

Hom.:

Cov.:

AF XY:

0.0114

AC XY:

851

AN XY:

74474

show subpopulations

African (AFR)

AF:

0.0416

AC:

1728

AN:

41560

American (AMR)

AF:

0.00419

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.000207

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000132

AC:

AN:

68018

Other (OTH)

AF:

0.00898

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

174

262

349

436

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00564

Hom.:

Bravo

AF:

0.0136

Asia WGS

AF:

0.00173

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (3)

not specified (2)

Neuronopathy, distal hereditary motor, type 7B (1)

Neuronopathy, distal hereditary motor, type 7B;C1862939:Amyotrophic lateral sclerosis type 1;C1868594:Perry syndrome (1)

Perry syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.37

CADD

Benign

(source)

DANN

Benign

0.85

PhyloP100

4.7

Mutation Taster

=92/8

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.059

dbscSNV1_RF

Benign

0.20

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over