15-44659245-G-C

Variant names:

• chr15-44659245-G-C
• rs771462279
• NM_025137.4:c.501C>G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_025137.4(SPG11):​c.501C>G​(p.Phe167Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000103 in 1,461,758 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.000010 (0 hom.)
• Consequence: SPG11 NM_025137.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 3.49

Genes affected

SPG11 (HGNC:11226): (SPG11 vesicle trafficking associated, spatacsin) The protein encoded by this gene is a potential transmembrane protein that is phosphorylated upon DNA damage. Defects in this gene are a cause of spastic paraplegia type 11 (SPG11). Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2009]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.0635744).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPG11	NM_025137.4	c.501C>G	p.Phe167Leu	missense_variant	Exon 3 of 40	ENST00000261866.12	NP_079413.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SPG11	ENST00000261866.12	c.501C>G	p.Phe167Leu	missense_variant	Exon 3 of 40	1	NM_025137.4	ENSP00000261866.7

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000239 AC: 6 AN: 251392 Hom.: 0 AF XY: 0.0000221 AC XY: 3 AN XY: 135886

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000352

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000103 AC: 15 AN: 1461758 Hom.: 0 Cov.: 32 AF XY: 0.0000138 AC XY: 10 AN XY: 727188

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000108

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome Cov.: 33

ExAC AF: 0.0000247 AC: 3

EpiCase AF: 0.000109

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:1

Apr 05, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 26556829) -

Hereditary spastic paraplegia 11 Uncertain:1

Dec 31, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces phenylalanine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 167 of the SPG11 protein (p.Phe167Leu). This variant is present in population databases (rs771462279, gnomAD 0.004%). This variant has not been reported in the literature in individuals affected with SPG11-related conditions. ClinVar contains an entry for this variant (Variation ID: 534889). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.46
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	17
DANN	Benign	0.71
DEOGEN2	Benign	0.0090	T;.;T;.;.
Eigen	Benign	-0.56
Eigen_PC	Benign	-0.31
FATHMM_MKL	Benign	0.61	D
LIST_S2	Benign	0.70	T;T;T;T;T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.064	T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.76	N;N;.;N;.
PrimateAI	Uncertain	0.52	T
PROVEAN	Benign	0.44	N;N;N;N;N
REVEL	Benign	0.11
Sift	Benign	1.0	T;T;T;T;T
Sift4G	Benign	1.0	T;T;T;T;T
Polyphen		0.0	B;.;B;.;.
Vest4		0.27
MutPred		0.22		Gain of ubiquitination at K170 (P = 0.102);Gain of ubiquitination at K170 (P = 0.102);Gain of ubiquitination at K170 (P = 0.102);Gain of ubiquitination at K170 (P = 0.102);Gain of ubiquitination at K170 (P = 0.102);
MVP		0.41
MPC		0.041
ClinPred		0.040	T
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.056
gMVP		0.39

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

Other links and lift over

dbSNP: rs771462279; hg19: chr15-44951443;