rs879255274

Variant names:

• chr15-44622723-C-T
• rs879255274
• ENST00000559193.5:c.2321G>A

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM2 PP3_Strong PP5_Moderate

The ENST00000559193.5(SPG11):​c.2321G>A​(p.Gly774Asp) variant causes a missense change. The variant allele was found at a frequency of 0.000000686 in 1,456,720 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: SPG11 ENST00000559193.5 missense
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 5.20
• Publications: 2 publications found

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]

SPG11 Gene-Disease associations (from GenCC):

• hereditary spastic paraplegia 11

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Orphanet, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Illumina, G2P
• amyotrophic lateral sclerosis type 5

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• Charcot-Marie-Tooth disease axonal type 2X

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Genomics England PanelApp
• juvenile amyotrophic lateral sclerosis

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 15-44622723-C-T is Pathogenic according to our data. Variant chr15-44622723-C-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 264661.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000559193.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SPG11	NM_025137.4	MANE Select	c.2316+5G>A		splice_region intron	N/A	NP_079413.3
	SPG11	NM_001411132.1		c.2316+5G>A		splice_region intron	N/A	NP_001398061.1
	SPG11	NM_001160227.2		c.2316+5G>A		splice_region intron	N/A	NP_001153699.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SPG11	ENST00000559193.5	TSL:1	c.2321G>A	p.Gly774Asp	missense	Exon 12 of 12	ENSP00000453848.1
	SPG11	ENST00000261866.12	TSL:1 MANE Select	c.2316+5G>A		splice_region intron	N/A	ENSP00000261866.7
	SPG11	ENST00000535302.6	TSL:1	c.2316+5G>A		splice_region intron	N/A	ENSP00000445278.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1456720 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 725030

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33368

American (AMR) AF: 0.00 AC: 0 AN: 44710

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26090

East Asian (EAS) AF: 0.00 AC: 0 AN: 39576

South Asian (SAS) AF: 0.00 AC: 0 AN: 86140

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53400

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5748

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1107490

Other (OTH) AF: 0.0000166 AC: 1 AN: 60198

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Likely pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Hereditary spastic paraplegia 11 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.48
CADD	Uncertain	24
DANN	Benign	0.97
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.26	T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.20	T
PhyloP100		5.2
PROVEAN	Benign	1.8	N
Sift	Benign	0.76	T
Sift4G	Benign	0.11	T
Vest4		0.26
MVP		0.73
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Mutation Taster		=1/99	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	1.0
SpliceAI score (max)		0.86		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.44		Position offset: -5
DS_DL_spliceai		0.86		Position offset: 5

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs879255274; hg19: chr15-44914921;