NM_025137.4:c.202_203dupTT

Variant names:

• chr15-44663444-C-CAA
• rs773773579
• NM_025137.4:c.202_203dupTT

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_025137.4(SPG11):​c.202_203dupTT​(p.Leu68PhefsTer2) variant causes a frameshift change. The variant allele was found at a frequency of 0.00000562 in 1,602,538 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: SPG11 NM_025137.4 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 4.50
• Publications: 0 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: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 15-44663444-C-CAA is Pathogenic according to our data. Variant chr15-44663444-C-CAA is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 586640.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_025137.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SPG11	NM_025137.4	MANE Select	c.202_203dupTT	p.Leu68PhefsTer2	frameshift	Exon 1 of 40	NP_079413.3
	SPG11	NM_001411132.1		c.202_203dupTT	p.Leu68PhefsTer2	frameshift	Exon 1 of 40	NP_001398061.1
	SPG11	NM_001160227.2		c.202_203dupTT	p.Leu68PhefsTer2	frameshift	Exon 1 of 38	NP_001153699.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SPG11	ENST00000261866.12	TSL:1 MANE Select	c.202_203dupTT	p.Leu68PhefsTer2	frameshift	Exon 1 of 40	ENSP00000261866.7
	SPG11	ENST00000535302.6	TSL:1	c.202_203dupTT	p.Leu68PhefsTer2	frameshift	Exon 1 of 38	ENSP00000445278.2
	SPG11	ENST00000427534.6	TSL:1	c.202_203dupTT	p.Leu68PhefsTer2	frameshift	Exon 1 of 37	ENSP00000396110.2

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152244 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000196

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: 0.00

GnomAD2 exomes AF: 0.0000231 AC: 5 AN: 216866 AF XY: 0.0000168

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000155

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 AF: 0.00000414 AC: 6 AN: 1450294 Hom.: 0 Cov.: 32 AF XY: 0.00000278 AC XY: 2 AN XY: 720594

African (AFR) AF: 0.00 AC: 0 AN: 33196

American (AMR) AF: 0.000138 AC: 6 AN: 43348

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25792

East Asian (EAS) AF: 0.00 AC: 0 AN: 39134

South Asian (SAS) AF: 0.00 AC: 0 AN: 84626

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51308

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1107282

Other (OTH) AF: 0.00 AC: 0 AN: 59860

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152244 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74366

African (AFR) AF: 0.00 AC: 0 AN: 41464

American (AMR) AF: 0.000196 AC: 3 AN: 15292

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5194

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68042

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
2	-	-	Hereditary spastic paraplegia 11 (2)
1	-	-	Hereditary spastic paraplegia 11;C1865864:Amyotrophic lateral sclerosis type 5;C5569024:Charcot-Marie-Tooth disease axonal type 2X (1)
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		4.5
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs773773579; hg19: chr15-44955642;