rs878854605

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_003119.4(SPG7):c.80C>G(p.Pro27Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000117 in 1,512,292 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P27Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

SPG7
NM_003119.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: -1.51

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 Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.100527406).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SPG7	NM_003119.4 linkuse as main transcript	c.80C>G	p.Pro27Arg	missense_variant	1/17	ENST00000645818.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SPG7	ENST00000645818.2 linkuse as main transcript	c.80C>G	p.Pro27Arg	missense_variant	1/17		NM_003119.4	P2	Q9UQ90-1

Frequencies

GnomAD3 genomes

AF:

0.000125

AC:

AN:

152016

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:

0.000189

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000235

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.0000741

AC:

AN:

107974

Hom.:

AF XY:

0.0000997

AC XY:

AN XY:

60170

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:

0.000157

Gnomad NFE exome

AF:

0.000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000116

AC:

158

AN:

1360276

Hom.:

Cov.:

AF XY:

0.000104

AC XY:

AN XY:

671070

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000613

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000341

Gnomad4 NFE exome

AF:

0.000132

Gnomad4 OTH exome

AF:

0.0000529

GnomAD4 genome

AF:

0.000125

AC:

AN:

152016

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74258

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:

0.000189

Gnomad4 NFE

AF:

0.000235

Gnomad4 OTH

AF:

0.000479

Alfa

AF:

0.000186

Hom.:

Bravo

AF:

0.000106

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 12, 2023

The c.80C>G (p.P27R) alteration is located in exon 1 (coding exon 1) of the SPG7 gene. This alteration results from a C to G substitution at nucleotide position 80, causing the proline (P) at amino acid position 27 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Hereditary spastic paraplegia 7

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

May 05, 2023

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt SPG7 protein function. ClinVar contains an entry for this variant (Variation ID: 239500). This missense change has been observed in individual(s) with clinical features of SPG7-related conditions (Invitae). This variant is present in population databases (no rsID available, gnomAD 0.03%). This sequence change replaces proline, which is neutral and non-polar, with arginine, which is basic and polar, at codon 27 of the SPG7 protein (p.Pro27Arg). -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Athena Diagnostics

May 12, 2023

Available data are insufficient to determine the clinical significance of the variant at this time. The frequency of this variant in the general population is uninformative in assessment of its pathogenicity (http://gnomad.broadinstitute.org). Computational tools predict that this variant is not damaging. The variant is located in a region that is considered important for protein function and/or structure. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.065

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.29

Cadd

Benign

1.9

Dann

Benign

0.86

DEOGEN2

Benign

0.044

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

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.10

LIST_S2

Benign

0.33

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

M_CAP

Pathogenic

0.37

MetaRNN

Benign

0.10

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

MetaSVM

Benign

-0.48

MutationAssessor

Benign

0.0

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

MutationTaster

Benign

1.0

N;N

PrimateAI

Uncertain

0.65

Polyphen

0.054

B;.;.;.;.;.;.;.;.;B

Vest4

0.23, 0.21

MutPred

0.23

Gain of MoRF binding (P = 2e-04);Gain of MoRF binding (P = 2e-04);Gain of MoRF binding (P = 2e-04);Gain of MoRF binding (P = 2e-04);Gain of MoRF binding (P = 2e-04);Gain of MoRF binding (P = 2e-04);Gain of MoRF binding (P = 2e-04);Gain of MoRF binding (P = 2e-04);Gain of MoRF binding (P = 2e-04);Gain of MoRF binding (P = 2e-04);

MVP

0.43

MPC

0.22

ClinPred

0.041

GERP RS

-2.2

Varity_R

0.032

gMVP

0.18

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