rs912983346

Positions:

chr16-89513037-G-C

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2PP3_StrongPP5_Very_Strong

The NM_003119.4(SPG7):c.376G>C(p.Glu126Gln) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000187 in 1,604,446 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

SPG7
NM_003119.4 missense, splice_region

Scores

Splicing: ADA: 1.000

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 4.36

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 14 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

PP5

Variant 16-89513037-G-C is Pathogenic according to our data. Variant chr16-89513037-G-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 424654.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SPG7	NM_003119.4 linkuse as main transcript	c.376G>C	p.Glu126Gln	missense_variant, splice_region_variant	3/17	ENST00000645818.2	NP_003110.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SPG7	ENST00000645818.2 linkuse as main transcript	c.376G>C	p.Glu126Gln	missense_variant, splice_region_variant	3/17		NM_003119.4	ENSP00000495795	P2	Q9UQ90-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152166

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.00000435

AC:

AN:

229880

Hom.:

AF XY:

0.00000801

AC XY:

AN XY:

124800

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000100

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000138

AC:

AN:

1452280

Hom.:

Cov.:

AF XY:

0.00000139

AC XY:

AN XY:

721946

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000181

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152166

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74342

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000478

Bravo

AF:

0.00000378

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia

Pathogenic:1

Pathogenic, criteria provided, single submitter

research

Unit for Genetic & Epidemiological Research on Neurological Disorders, Instituto de Investigação e Inovação em Saúde

Mar 07, 2017

- -

not provided

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Athena Diagnostics

Dec 08, 2016

- -

Hereditary spastic paraplegia 7

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 08, 2024

This sequence change replaces glutamic acid, which is acidic and polar, with glutamine, which is neutral and polar, at codon 126 of the SPG7 protein (p.Glu126Gln). This variant also falls at the last nucleotide of exon 3, which is part of the consensus splice site for this exon. This variant is present in population databases (no rsID available, gnomAD 0.001%). This missense change has been observed in individuals with hereditary spastic paraplegia (PMID: 22571692, 28832565). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 424654). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Pathogenic

0.19

BayesDel_noAF

Uncertain

0.040

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.082

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

Eigen

Uncertain

0.29

Eigen_PC

Uncertain

0.25

FATHMM_MKL

Uncertain

0.93

LIST_S2

Benign

0.85

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

MetaRNN

Benign

0.28

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

MetaSVM

Uncertain

0.56

MutationAssessor

Uncertain

2.5

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

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.44

PROVEAN

Benign

-1.7

.;.;.;.;.;.;.;.;N;N

REVEL

Uncertain

0.47

Sift

Benign

0.11

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

Sift4G

Benign

0.17

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

Polyphen

0.98, 1.0

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

Vest4

0.40, 0.41

MutPred

0.23

.;Gain of helix (P = 0.1736);Gain of helix (P = 0.1736);Gain of helix (P = 0.1736);Gain of helix (P = 0.1736);Gain of helix (P = 0.1736);Gain of helix (P = 0.1736);Gain of helix (P = 0.1736);Gain of helix (P = 0.1736);Gain of helix (P = 0.1736);

MVP

0.88

MPC

0.36

ClinPred

0.83

GERP RS

4.5

RBP_binding_hub_radar

0.91

RBP_regulation_power_radar

3.8

Varity_R

0.23

gMVP

0.51

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

1.0

SpliceAI score (max)

0.72

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.70

Position offset: 23

DS_DL_spliceai

0.72

Position offset: 0

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