rs187330648

Positions:

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_StrongBP6BP7BS1BS2

The NM_003119.4(SPG7):c.120G>A(p.Gly40Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0124 in 1,512,498 control chromosomes in the GnomAD database, including 138 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0094 ( 12 hom., cov: 33)

Exomes 𝑓: 0.013 ( 126 hom. )

Consequence

SPG7
NM_003119.4 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:1B:7

Conservation

PhyloP100: 1.29

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:

SPG7 (HGNC:):

SPG7 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -14 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.56).

BP6

Variant 16-89508537-G-A is Benign according to our data. Variant chr16-89508537-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 139253.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Benign=7, Likely_pathogenic=1}.

BP7

Synonymous conserved (PhyloP=1.29 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00936 (1426/152290) while in subpopulation NFE AF= 0.0146 (992/67992). AF 95% confidence interval is 0.0138. There are 12 homozygotes in gnomad4. There are 644 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 12 Mitochondrial gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SPG7	NM_003119.4 linkuse as main transcript	c.120G>A	p.Gly40Gly	synonymous_variant	1/17	ENST00000645818.2	NP_003110.1	Q9UQ90-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SPG7	ENST00000645818.2 linkuse as main transcript	c.120G>A	p.Gly40Gly	synonymous_variant	1/17		NM_003119.4	ENSP00000495795.2		Q9UQ90-1

Frequencies

GnomAD3 genomes

AF:

0.00937

AC:

1426

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00294

Gnomad AMI

AF:

0.00987

Gnomad AMR

AF:

0.0128

Gnomad ASJ

AF:

0.00634

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00455

Gnomad FIN

AF:

0.00236

Gnomad MID

AF:

0.0191

Gnomad NFE

AF:

0.0146

Gnomad OTH

AF:

0.0153

GnomAD3 exomes

AF:

0.00974

AC:

1044

AN:

107214

Hom.:

AF XY:

0.00969

AC XY:

580

AN XY:

59846

show subpopulations

Gnomad AFR exome

AF:

0.00304

Gnomad AMR exome

AF:

0.00830

Gnomad ASJ exome

AF:

0.00909

Gnomad EAS exome

AF:

0.000279

Gnomad SAS exome

AF:

0.00667

Gnomad FIN exome

AF:

0.00263

Gnomad NFE exome

AF:

0.0156

Gnomad OTH exome

AF:

0.00947

GnomAD4 exome

AF:

0.0127

AC:

17289

AN:

1360208

Hom.:

126

Cov.:

AF XY:

0.0125

AC XY:

8400

AN XY:

670778

show subpopulations

Gnomad4 AFR exome

AF:

0.00191

Gnomad4 AMR exome

AF:

0.00888

Gnomad4 ASJ exome

AF:

0.00884

Gnomad4 EAS exome

AF:

0.0000613

Gnomad4 SAS exome

AF:

0.00671

Gnomad4 FIN exome

AF:

0.00338

Gnomad4 NFE exome

AF:

0.0145

Gnomad4 OTH exome

AF:

0.0102

GnomAD4 genome

AF:

0.00936

AC:

1426

AN:

152290

Hom.:

Cov.:

AF XY:

0.00865

AC XY:

644

AN XY:

74460

show subpopulations

Gnomad4 AFR

AF:

0.00293

Gnomad4 AMR

AF:

0.0127

Gnomad4 ASJ

AF:

0.00634

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00476

Gnomad4 FIN

AF:

0.00236

Gnomad4 NFE

AF:

0.0146

Gnomad4 OTH

AF:

0.0151

Alfa

AF:

0.00509

Hom.:

Bravo

AF:

0.0106

Asia WGS

AF:

0.00116

AC:

AN:

3466

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:1Benign:7

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia 7

Pathogenic:1Uncertain:1Benign:2

Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 30, 2024	- -
Likely pathogenic, criteria provided, single submitter	research	PROSPAX: an integrated multimodal progression chart in spastic ataxias, Center for Neurology; Hertie-Institute for Clinical Brain Research	Jan 01, 2022	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Nov 08, 2023	- -

not specified

Benign:3

Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 25, 2015	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Dec 27, 2013	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. -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	Feb 16, 2016	- -

Hereditary spastic paraplegia

Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Oct 30, 2021

- -

not provided

Benign:1

Benign, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Oct 01, 2024

SPG7: BP4, BP7, BS1, BS2 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.56

CADD

Benign

5.9

DANN

Benign

0.83

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