16-89530702-G-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_003119.4(SPG7):c.881G>A(p.Arg294His) variant causes a missense change. The variant allele was found at a frequency of 0.002 in 1,614,072 control chromosomes in the GnomAD database, including 61 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R294G) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.011 ( 34 hom., cov: 33)

Exomes 𝑓: 0.0011 ( 27 hom. )

Consequence

SPG7
NM_003119.4 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 6.39

Publications

4 publications found

Variant links:

Genes affected

SPG7 (HGNC:11237): (SPG7 matrix AAA peptidase subunit, paraplegin) This gene encodes a mitochondrial metalloprotease protein that is a member of the AAA family. Members of this protein family share an ATPase domain and have roles in diverse cellular processes including membrane trafficking, intracellular motility, organelle biogenesis, protein folding, and proteolysis. Mutations in this gene cause autosomal recessive spastic paraplegia 7. Two transcript variants encoding distinct isoforms have been identified. [provided by RefSeq, Mar 2014]

SPG7 Gene-Disease associations (from GenCC):

hereditary spastic paraplegia 7
Inheritance: AR, AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, G2P, Orphanet, Labcorp Genetics (formerly Invitae)
lateral sclerosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

SPG7 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.00891611).

BP6

Variant 16-89530702-G-A is Benign according to our data. Variant chr16-89530702-G-A is described in ClinVar as Benign. ClinVar VariationId is 139237.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 = 0.0107 (1631/152194) while in subpopulation AFR AF = 0.0377 (1563/41490). AF 95% confidence interval is 0.0361. There are 34 homozygotes in GnomAd4. There are 791 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 34 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPG7	NM_003119.4 link	c.881G>A	p.Arg294His	missense_variant	Exon 7 of 17	ENST00000645818.2	NP_003110.1	Q9UQ90-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SPG7	ENST00000645818.2 link	c.881G>A	p.Arg294His	missense_variant	Exon 7 of 17		NM_003119.4	ENSP00000495795.2		Q9UQ90-1

Frequencies

GnomAD3 genomes

AF:

0.0107

AC:

1628

AN:

152076

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0377

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00295

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:

0.000147

Gnomad OTH

AF:

0.00623

GnomAD2 exomes

AF:

0.00272

AC:

683

AN:

251406

AF XY:

0.00201

show subpopulations

Gnomad AFR exome

AF:

0.0395

Gnomad AMR exome

AF:

0.000752

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000703

Gnomad OTH exome

AF:

0.000815

GnomAD4 exome

AF:

0.00109

AC:

1596

AN:

1461878

Hom.:

Cov.:

AF XY:

0.000967

AC XY:

703

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.0415

AC:

1388

AN:

33480

American (AMR)

AF:

0.00127

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000756

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000580

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.000520

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000324

AC:

AN:

1112010

Other (OTH)

AF:

0.00172

AC:

104

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

109

218

327

436

545

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

126

168

210

<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:

0.0107

AC:

1631

AN:

152194

Hom.:

Cov.:

AF XY:

0.0106

AC XY:

791

AN XY:

74434

show subpopulations

African (AFR)

AF:

0.0377

AC:

1563

AN:

41490

American (AMR)

AF:

0.00294

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000147

AC:

AN:

68012

Other (OTH)

AF:

0.00616

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.495

Heterozygous variant carriers

150

226

301

376

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:

0.00406

Hom.:

Bravo

AF:

0.0118

ESP6500AA

AF:

0.0359

AC:

158

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00338

AC:

411

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia 7

Benign:3

Apr 28, 2017

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to rule this variant out of causing disease. Therefore, this variant is classified as benign. -

Oct 11, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 09, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:2

Nov 21, 2017

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

not specified

Benign:1

May 23, 2013

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.38

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.55

.;.;D;.;.;.;.;.;.;.;.

Eigen

Pathogenic

0.69

Eigen_PC

Pathogenic

0.67

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Pathogenic

0.98

D;D;D;D;D;D;D;D;D;D;D

MetaRNN

Benign

0.0089

T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.59

MutationAssessor

Uncertain

2.2

.;.;M;.;.;.;.;.;.;.;M

PhyloP100

6.4

PrimateAI

Uncertain

0.51

PROVEAN

Uncertain

-3.2

.;.;.;.;.;.;.;.;.;D;D

REVEL

Benign

0.26

Sift

Benign

0.20

.;.;.;.;.;.;.;.;.;T;T

Sift4G

Benign

0.082

.;.;.;.;.;.;.;.;.;T;D

Polyphen

0.97, 1.0

.;.;D;.;.;.;.;.;.;.;D

Vest4

0.57, 0.52

MVP

0.78

MPC

0.82

ClinPred

0.026

GERP RS

4.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.22

gMVP

0.68

Mutation Taster

=90/10

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over