16-89508426-G-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_003119.4(SPG7):c.9G>T(p.Val3Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00211 in 1,480,564 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 Likely benign (★★).

Frequency

Genomes: 𝑓 0.011 ( 37 hom., cov: 33)

Exomes 𝑓: 0.0010 ( 24 hom. )

Consequence

SPG7
NM_003119.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: -2.98

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 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

BP6

Variant 16-89508426-G-T is Benign according to our data. Variant chr16-89508426-G-T is described in ClinVar as [Likely_benign]. Clinvar id is 139252.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-89508426-G-T is described in Lovd as [Likely_benign]. Variant chr16-89508426-G-T is described in Lovd as [Benign].

BP7

Synonymous conserved (PhyloP=-2.98 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0114 (1742/152166) while in subpopulation AFR AF= 0.0395 (1642/41528). AF 95% confidence interval is 0.0379. There are 37 homozygotes in gnomad4. There are 814 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 37 Mitochondrial gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPG7	NM_003119.4 link	c.9G>T	p.Val3Val	synonymous_variant	Exon 1 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.9G>T	p.Val3Val	synonymous_variant	Exon 1 of 17		NM_003119.4	ENSP00000495795.2		Q9UQ90-1

Frequencies

GnomAD3 genomes

AF:

0.0114

AC:

1734

AN:

152058

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0395

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00432

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000206

Gnomad OTH

AF:

0.00861

GnomAD3 exomes

AF:

0.00116

AC:

102

AN:

87752

Hom.:

AF XY:

0.000823

AC XY:

AN XY:

49820

show subpopulations

Gnomad AFR exome

AF:

0.0328

Gnomad AMR exome

AF:

0.00271

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000564

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000441

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.00104

AC:

1383

AN:

1328398

Hom.:

Cov.:

AF XY:

0.000886

AC XY:

580

AN XY:

654814

show subpopulations

Gnomad4 AFR exome

AF:

0.0391

Gnomad4 AMR exome

AF:

0.00290

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000814

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000750

Gnomad4 OTH exome

AF:

0.00279

GnomAD4 genome

AF:

0.0114

AC:

1742

AN:

152166

Hom.:

Cov.:

AF XY:

0.0109

AC XY:

814

AN XY:

74400

show subpopulations

Gnomad4 AFR

AF:

0.0395

Gnomad4 AMR

AF:

0.00432

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000206

Gnomad4 OTH

AF:

0.00852

Alfa

AF:

0.00867

Hom.:

Bravo

AF:

0.0133

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Apr 16, 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. -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Hereditary spastic paraplegia 7

Benign:2

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:2

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Hereditary spastic paraplegia

Benign:1

Dec 23, 2020

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

0.20

DANN

Benign

0.55

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.1

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over