Genetic Variant NM_130837.3:c.1935+51T>A (chr3-193648185-T-A) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBS1BS2

The NM_130837.3(OPA1):c.1935+51T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000959 in 1,397,482 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000096 ( 3 hom. )

Consequence

OPA1
NM_130837.3 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.43

Publications

11 publications found

Variant links:

Genes affected

OPA1 (HGNC:8140): (OPA1 mitochondrial dynamin like GTPase) The protein encoded by this gene is a nuclear-encoded mitochondrial protein with similarity to dynamin-related GTPases. The encoded protein localizes to the inner mitochondrial membrane and helps regulate mitochondrial stability and energy output. This protein also sequesters cytochrome c. Mutations in this gene have been associated with optic atrophy type 1, which is a dominantly inherited optic neuropathy resulting in progressive loss of visual acuity, leading in many cases to legal blindness. [provided by RefSeq, Aug 2017]

OPA1 Gene-Disease associations (from GenCC):

autosomal dominant optic atrophy, classic form
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics
optic atrophy
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
optic atrophy with or without deafness, ophthalmoplegia, myopathy, ataxia, and neuropathy
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), G2P
OPA1-related optic atrophy with or without extraocular features
Inheritance: SD Classification: DEFINITIVE Submitted by: ClinGen
Behr syndrome
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
mitochondrial DNA depletion syndrome 14 (cardioencephalomyopathic type)
Inheritance: AR Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
Leigh syndrome
Inheritance: AR Classification: MODERATE Submitted by: ClinGen
autosomal dominant optic atrophy plus syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

OPA1 links:

ENSG00000306963 (HGNC:):

ENSG00000306963 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.85).

BS1

Variant frequency is greater than expected in population mid. GnomAdExome4 allele frequency = 0.0000964 (120/1245384) while in subpopulation MID AF = 0.00186 (10/5386). AF 95% confidence interval is 0.00101. There are 3 homozygotes in GnomAdExome4. There are 77 alleles in the male GnomAdExome4 subpopulation. Median coverage is 17. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 3 AD,AR,SD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OPA1	NM_130837.3 link	c.1935+51T>A		intron_variant	Intron 20 of 30	ENST00000361510.8	NP_570850.2	O60313-10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OPA1	ENST00000361510.8 link	c.1935+51T>A		intron_variant	Intron 20 of 30	5	NM_130837.3	ENSP00000355324.2		O60313-10

Frequencies

GnomAD3 genomes

AF:

0.0000921

AC:

AN:

151980

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000181

AC:

AN:

242784

AF XY:

0.000236

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000206

Gnomad ASJ exome

AF:

0.000505

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000175

Gnomad OTH exome

AF:

0.000672

GnomAD4 exome

AF:

0.0000964

AC:

120

AN:

1245384

Hom.:

Cov.:

AF XY:

0.000122

AC XY:

AN XY:

630090

show subpopulations

African (AFR)

AF:

0.0000343

AC:

AN:

29190

American (AMR)

AF:

0.000227

AC:

AN:

44008

Ashkenazi Jewish (ASJ)

AF:

0.000404

AC:

AN:

24734

East Asian (EAS)

AF:

0.00

AC:

AN:

38402

South Asian (SAS)

AF:

0.000320

AC:

AN:

81338

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52964

Middle Eastern (MID)

AF:

0.00186

AC:

AN:

5386

European-Non Finnish (NFE)

AF:

0.0000578

AC:

AN:

916232

Other (OTH)

AF:

0.000188

AC:

AN:

53130

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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

GnomAD4 genome

AF:

0.0000920

AC:

AN:

152098

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74336

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41456

American (AMR)

AF:

0.0000654

AC:

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.000288

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.000415

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10574

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000132

AC:

AN:

67990

Other (OTH)

AF:

0.00

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.518

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

Alfa

AF:

0.000193

Hom.:

2074

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.85

CADD

Benign

0.19

(source)

DANN

Benign

0.19

PhyloP100

-1.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Mutation Taster

=100/0

polymorphism

(source)

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

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over