Genetic Variant SPG7:p.Tyr138Cys (chr16-89524042-A-G) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP3

The NM_001363850.1(SPG7):c.413A>G(p.Tyr138Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y138S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Consequence

SPG7
NM_001363850.1 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 9.11

Publications

2 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:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.811

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001363850.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SPG7	NM_003119.4	MANE Select	c.413A>G	p.Tyr138Cys	missense	Exon 4 of 17	NP_003110.1
SPG7	NM_001363850.1		c.413A>G	p.Tyr138Cys	missense	Exon 4 of 18	NP_001350779.1
SPG7	NM_199367.3		c.413A>G	p.Tyr138Cys	missense	Exon 4 of 10	NP_955399.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SPG7	ENST00000645818.2	MANE Select	c.413A>G	p.Tyr138Cys	missense	Exon 4 of 17	ENSP00000495795.2
SPG7	ENST00000268704.7	TSL:1	c.413A>G	p.Tyr138Cys	missense	Exon 4 of 17	ENSP00000268704.3
SPG7	ENST00000341316.6	TSL:1	c.413A>G	p.Tyr138Cys	missense	Exon 4 of 10	ENSP00000341157.2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00

AC:

AN:

250820

AF XY:

0.00

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.44

BayesDel_addAF

Pathogenic

0.36

BayesDel_noAF

Pathogenic

0.28

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.49

Eigen

Uncertain

0.56

Eigen_PC

Uncertain

0.60

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.95

M_CAP

Uncertain

0.20

MetaRNN

Pathogenic

0.81

MetaSVM

Uncertain

0.77

MutationAssessor

Uncertain

2.5

PhyloP100

9.1

PrimateAI

Uncertain

0.68

PROVEAN

Uncertain

-3.1

REVEL

Pathogenic

0.79

Sift

Uncertain

0.017

Sift4G

Benign

0.14

Polyphen

0.99

Vest4

0.70

MutPred

0.47

Loss of phosphorylation at Y138 (P = 0.0392)

MVP

0.97

MPC

0.79

ClinPred

1.0

GERP RS

5.4

PromoterAI

0.0070

Neutral

(source)

RBP_binding_hub_radar

1.1

RBP_regulation_power_radar

2.8

Varity_R

0.30

gMVP

0.83

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over