11-6617154-C-G

Variant summary

Our verdict is Pathogenic. The variant received 15 ACMG points: 16P and 1B. PVS1PP5_Very_StrongBS1_Supporting

The NM_000391.4(TPP1):​c.509-1G>C variant causes a splice acceptor, intron change. The variant allele was found at a frequency of 0.00126 in 1,613,980 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★★).

Frequency

Genomes: 𝑓 0.00049 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0013 ( 0 hom. )

Consequence

TPP1
NM_000391.4 splice_acceptor, intron

Scores

5
1
Splicing: ADA: 1.000
2

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:38O:2

Conservation

PhyloP100: 4.61

Publications

51 publications found
Variant links:
Genes affected
TPP1 (HGNC:2073): (tripeptidyl peptidase 1) This gene encodes a member of the sedolisin family of serine proteases. The protease functions in the lysosome to cleave N-terminal tripeptides from substrates, and has weaker endopeptidase activity. It is synthesized as a catalytically-inactive enzyme which is activated and auto-proteolyzed upon acidification. Mutations in this gene result in late-infantile neuronal ceroid lipofuscinosis, which is associated with the failure to degrade specific neuropeptides and a subunit of ATP synthase in the lysosome. [provided by RefSeq, Jul 2008]
TPP1 Gene-Disease associations (from GenCC):
  • neuronal ceroid lipofuscinosis
    Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
  • neuronal ceroid lipofuscinosis 2
    Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Myriad Women’s Health, G2P, Orphanet
  • autosomal recessive spinocerebellar ataxia 7
    Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 15 ACMG points.

PVS1
Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, No cryptic splice site detected. Exon removal results in frameshift change.
PP5
Variant 11-6617154-C-G is Pathogenic according to our data. Variant chr11-6617154-C-G is described in ClinVar as Pathogenic. ClinVar VariationId is 2644.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
BS1
Variant frequency is greater than expected in population nfe. GnomAdExome4 allele frequency = 0.00134 (1960/1461866) while in subpopulation NFE AF = 0.0017 (1895/1111994). AF 95% confidence interval is 0.00164. There are 0 homozygotes in GnomAdExome4. There are 927 alleles in the male GnomAdExome4 subpopulation. Median coverage is 41. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000391.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected
GeneTranscriptTagsHGVScHGVSpEffectExon RankProteinUniProt
TPP1
NM_000391.4
MANE Select
c.509-1G>C
splice_acceptor intron
N/ANP_000382.3

Ensembl Transcripts

Selected
GeneTranscriptTagsHGVScHGVSpEffectExon RankProteinUniProt
TPP1
ENST00000299427.12
TSL:1 MANE Select
c.509-1G>C
splice_acceptor intron
N/AENSP00000299427.6
TPP1
ENST00000533371.6
TSL:1
c.-221-1G>C
splice_acceptor intron
N/AENSP00000437066.1
TPP1
ENST00000428886.7
TSL:2
n.743G>C
non_coding_transcript_exon
Exon 4 of 4

Frequencies

GnomAD3 genomes
AF:
0.000486
AC:
74
AN:
152114
Hom.:
0
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.000217
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.0000655
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:
0.000941
Gnomad OTH
AF:
0.00
GnomAD2 exomes
AF:
0.000402
AC:
101
AN:
251364
AF XY:
0.000368
show subpopulations
Gnomad AFR exome
AF:
0.00
Gnomad AMR exome
AF:
0.0000289
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.000185
Gnomad NFE exome
AF:
0.000836
Gnomad OTH exome
AF:
0.000163
GnomAD4 exome
AF:
0.00134
AC:
1960
AN:
1461866
Hom.:
0
Cov.:
41
AF XY:
0.00127
AC XY:
927
AN XY:
727242
show subpopulations
African (AFR)
AF:
0.000119
AC:
4
AN:
33480
American (AMR)
AF:
0.0000447
AC:
2
AN:
44722
Ashkenazi Jewish (ASJ)
AF:
0.0000383
AC:
1
AN:
26132
East Asian (EAS)
AF:
0.00
AC:
0
AN:
39700
South Asian (SAS)
AF:
0.00
AC:
0
AN:
86258
European-Finnish (FIN)
AF:
0.000187
AC:
10
AN:
53418
Middle Eastern (MID)
AF:
0.00
AC:
0
AN:
5768
European-Non Finnish (NFE)
AF:
0.00170
AC:
1895
AN:
1111994
Other (OTH)
AF:
0.000795
AC:
48
AN:
60394
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.469
Heterozygous variant carriers
0
120
241
361
482
602
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance

Age Distribution

Exome Het
Variant carriers
0
82
164
246
328
410
<30
30-35
35-40
40-45
45-50
50-55
55-60
60-65
65-70
70-75
75-80
>80
Age
GnomAD4 genome
AF:
0.000486
AC:
74
AN:
152114
Hom.:
0
Cov.:
32
AF XY:
0.000404
AC XY:
30
AN XY:
74308
show subpopulations
African (AFR)
AF:
0.000217
AC:
9
AN:
41396
American (AMR)
AF:
0.0000655
AC:
1
AN:
15274
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
3470
East Asian (EAS)
AF:
0.00
AC:
0
AN:
5186
South Asian (SAS)
AF:
0.00
AC:
0
AN:
4830
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
10624
Middle Eastern (MID)
AF:
0.00
AC:
0
AN:
316
European-Non Finnish (NFE)
AF:
0.000941
AC:
64
AN:
68016
Other (OTH)
AF:
0.00
AC:
0
AN:
2090
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.493
Heterozygous variant carriers
0
4
8
12
16
20
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance

Age Distribution

Genome Het
Variant carriers
0
2
4
6
8
10
<30
30-35
35-40
40-45
45-50
50-55
55-60
60-65
65-70
70-75
75-80
>80
Age
Alfa
AF:
0.000507
Hom.:
0
Bravo
AF:
0.000484
TwinsUK
AF:
0.00216
AC:
8
ALSPAC
AF:
0.00208
AC:
8
ESP6500AA
AF:
0.00
AC:
0
ESP6500EA
AF:
0.00105
AC:
9
ExAC
AF:
0.000354
AC:
43
EpiCase
AF:
0.000600
EpiControl
AF:
0.00119

ClinVar

Significance: Pathogenic
Submissions summary: Pathogenic:38Other:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

Neuronal ceroid lipofuscinosis 2 Pathogenic:19Other:1
Aug 14, 2018
Illumina Laboratory Services, Illumina
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

The TPP1 c.509-1G>C variant occurs in a canonical splice site (acceptor) and is therefore predicted to disrupt or distort the normal gene product. The c.509-1G>C variant is described as one of the two most common pathogenic variants found in individuals with the classical late-infantile form of neuronal ceroid-lipofuscinosis (LINCL), often found in a compound heterozygous state with the other common variant, p.Arg508Ter. Together they account for up to 60% of pathogenic variants in the TPP1 gene (Zhong et al. 1998; Sleat et al. 1999; Steinfeld et al. 2002). Across a selection of the literature, the c.509-1G>C variant was detected in a total of 56 individuals affected with LINCL, including in ten individuals in a homozygous state, in 42 individuals in a compound heterozygous state (two of whom were related) and in four individuals in a heterozygous state in whom a second variant was not detected due to incomplete screening methods. The variant was also found in a heterozygous state in one unaffected family member (Sleat et al. 1997; Zhong et al. 1998; Sleat et al. 1999; Steinfeld et al. 2002). The variant was absent from 32 control chromosomes and is reported at a frequency of 0.001047 in the European American population of the Exome Sequencing Project. The variant results in a significant reduction in TPP1 protease activity to between 0 - 10% of wild type depending on the sample type (Sleat et al. 1999; Steinfeld et al. 2002; Miller et al. 2013). Based on the collective evidence and the potential impact of splice acceptor variants, the c.509-1G>C variant is classified as pathogenic for neuronal ceroid-lipofuscinosis. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population.

Baylor Genetics
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Nov 18, 2019
Myriad Genetics, Inc.
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

NM_000391.3(TPP1):c.509-1G>C(aka IVS5-1G>C) is classified as pathogenic in the context of TPP1-related neuronal ceroid lipofuscinosis and is associated with the late-infantile form of the disease. Sources cited for classification include the following: PMID 9788728, 11339651 and 18684116. Classification of NM_000391.3(TPP1):c.509-1G>C(aka IVS5-1G>C) is based on the following criteria: The variant is located at a canonical splice site, is expected to disrupt gene function and is reported in individuals with the relevant phenotype. Please note: this variant was assessed in the context of healthy population screening.‚Äã

Feb 28, 2025
3billion
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

The variant is observed at an extremely low frequency in the gnomAD v4.1.0 dataset (total allele frequency: 0.126%). Predicted Consequence/Location: Canonical splice site: predicted to alter splicing and result in a loss or disruption of normal protein function. Multiple pathogenic loss-of-function variants are reported downstream of the variant. In silico tools predict the variant to alter splicing and produce an abnormal transcript [SpliceAI: 0.96 (spliceogenicity >=0.2, non-spliceogenicity <0.1)]. The variant has been reported at least twice as pathogenic with clinical assertions and evidence for the classification (ClinVar ID: VCV000002644 /PMID: 9295267). Therefore, this variant is classified as Pathogenic according to the recommendation of ACMG/AMP guideline.

Nov 08, 2017
Institute of Human Genetics Munich, TUM University Hospital
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

May 01, 2013
OMIM
Significance:Pathogenic
Review Status:no assertion criteria provided
Collection Method:literature only

Jul 13, 2021
UNC Molecular Genetics Laboratory, University of North Carolina at Chapel Hill
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:research

Feb 22, 2021
New York Genome Center
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen
Significance:Pathogenic
Review Status:no assertion criteria provided
Collection Method:clinical testing

Jan 13, 2014
Courtagen Diagnostics Laboratory, Courtagen Life Sciences
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Feb 10, 2015
HudsonAlpha Institute for Biotechnology, HudsonAlpha Institute for Biotechnology
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:research

Apr 05, 2019
Centre for Mendelian Genomics, University Medical Centre Ljubljana
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

This variant was classified as: Pathogenic. The following ACMG criteria were applied in classifying this variant: PVS1,PS1,PP3.

Aug 01, 2013
GeneReviews
Significance:Pathogenic
Review Status:no assertion criteria provided
Collection Method:curation

Mar 22, 2016
Genetic Services Laboratory, University of Chicago
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Sep 16, 2020
Natera, Inc.
Significance:Pathogenic
Review Status:no assertion criteria provided
Collection Method:clinical testing

Oct 08, 2024
Victorian Clinical Genetics Services, Murdoch Childrens Research Institute
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as Pathogenic. Following criteria are met: 0102 - Loss of function is a known mechanism of disease in this gene and is associated with neuronal ceroid lipofuscinosis 2 (CLN2; MIM#204500). (I) 0106 - This gene is associated with autosomal recessive disease. (I) 0210 - Splice site variant proven to affect splicing of the transcript with a known effect on protein sequence. RT-PCR studies showed intron 5 retention, resulting in p.(Val170Glyfs*29) which is predicted to cause nonsense-mediated decay (NMD) and loss of protein (premature termination codon is located at least 54 nucleotides upstream of the final exon-exon junction) (PMID: 23418007). (SP) 0251 - This variant is heterozygous. (I) 0304 - Variant is present in gnomAD <0.01 for a recessive condition (v2: 113 heterozygotes, 0 homozygotes). (SP) 0701 - Other NMD predicted variants comparable to the one identified in this case have very strong previous evidence for pathogenicity (ClinVar, Decipher). (SP) 0801 - This variant has strong previous evidence of pathogenicity in unrelated individuals. It is one of the most commonly reported variants in homozygous and compound heterozygous patients with CLN2 (ClinVar; PMID: 31283065; PMID: 32329550). (SP) 1208 - Inheritance information for this variant is not currently available in this individual. The father has not been tested and the mother (VCGS # 20G001560) has tested negative for this variant. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign

Sep 21, 2015
Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

May 07, 2025
Institute of Human Genetics, University of Leipzig Medical Center
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Criteria applied: PVS1,PS3,PM3,PP3; Identified as compund heterozygous with NM_000391.4:c.622C>T

GenomeConnect - Invitae Patient Insights Network
Significance:not provided
Review Status:no classification provided
Collection Method:phenotyping only

Variant interpreted as Pathogenic and reported on 06-16-2020 by Lab Invitae. GenomeConnect-Invitae Patient Insights Network assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. Registry team members make no attempt to reinterpret the clinical significance of the variant. Phenotypic details are available under supporting information.

Oct 23, 2015
Knight Diagnostic Laboratories, Oregon Health and Sciences University
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

he c.509-1G>C variant is one of the most common pathogenic variants associated with LINCL and is found in both the homozygous or compound heterozygous state (Sleat DE et al., 1999; Zhong N et al., 1998; Kousi M et al., 2011). This variant was shown to segregate with disease in a non-consanguineous sib ship and in affected individuals who harbor this variant; enzyme activity in the leukocytes and fibroblasts was very low to almost absent respectively (Sun Y et al., 2013). Furthermore, the frequency of this variant is very low in the population database (1000 Genome, Exome Sequencing Project and ExAC). This locus is conserved across species and several computational algorithms predict the loss of splice-acceptor site in intron 5. Finally, several reputable clinical sources have classified this variant as pathogenic. In summary, the evidence meets our laboratory’s criteria for a Pathogenic classification

not provided Pathogenic:12
Mar 20, 2023
Clinical Genetics Laboratory, Skane University Hospital Lund
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Sep 01, 2025
CeGaT Center for Human Genetics Tuebingen
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

TPP1: PM3:Very Strong, PVS1, PM2:Supporting

Mar 13, 2018
Mayo Clinic Laboratories, Mayo Clinic
Significance:Pathogenic
Review Status:no assertion criteria provided
Collection Method:clinical testing

Jan 19, 2025
Labcorp Genetics (formerly Invitae), Labcorp
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

This sequence change affects an acceptor splice site in intron 5 of the TPP1 gene. It is expected to disrupt RNA splicing. Variants that disrupt the donor or acceptor splice site typically lead to a loss of protein function (PMID: 16199547), and loss-of-function variants in TPP1 are known to be pathogenic (PMID: 10330339). This variant is present in population databases (rs56144125, gnomAD 0.08%). Disruption of this splice site has been observed in individuals with late-infantile neuronal ceroid lipofuscinosis (PMID: 9295267, 9788728, 10330339, 12376936). This variant is also known as c.523-1G>C, c.3556G>C or IVS5-1G>C. ClinVar contains an entry for this variant (Variation ID: 2644). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic.

Feb 16, 2017
Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Jan 28, 2022
GeneDx
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Canonical splice site variant in a gene for which loss-of-function is a known mechanism of disease; Different variant affecting the same splice site (c.509-1G>A) has been reported as pathogenic in the Human Gene Mutation Database and at GeneDx in association with NCL (Stenson et al., 2014); This variant is associated with the following publications: (PMID: 26026925, 26143525, 25976102, 26795593, 28335910, 10330339, 9788728, 26224725, 28554332, 9295267, 29056246, 29631617, 29655203, 30283815, 30548430, 31487502, 32631363, 31980526, 33845243, 12376936, 32298681, 31589614, 21990111, 23539563, 35054396, 34831035)

Apr 26, 2017
Eurofins Ntd Llc (ga)
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Genome Diagnostics Laboratory, University Medical Center Utrecht
Significance:Pathogenic
Review Status:no assertion criteria provided
Collection Method:clinical testing

Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)
Significance:Pathogenic
Review Status:no assertion criteria provided
Collection Method:clinical testing

Genome Diagnostics Laboratory, Amsterdam University Medical Center
Significance:Pathogenic
Review Status:no assertion criteria provided
Collection Method:clinical testing

Feb 16, 2023
Revvity Omics, Revvity
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Nov 03, 2021
Institute for Clinical Genetics, University Hospital TU Dresden, University Hospital TU Dresden
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Autosomal recessive spinocerebellar ataxia 7;C1876161:Neuronal ceroid lipofuscinosis 2 Pathogenic:2Other:1
Oct 31, 2018
Fulgent Genetics, Fulgent Genetics
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Apr 26, 2022
Fulgent Genetics, Fulgent Genetics
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

GenomeConnect, ClinGen
Significance:not provided
Review Status:no classification provided
Collection Method:phenotyping only

Variant classified as Pathogenic and reported on 07-28-2014 by Baylor Genetics. GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant.

Neuronal ceroid lipofuscinosis Pathogenic:2
May 03, 2012
Clinical Molecular Genetics Laboratory, Johns Hopkins All Children's Hospital
Significance:Pathogenic
Review Status:no assertion criteria provided
Collection Method:clinical testing

Jul 10, 2017
Women's Health and Genetics/Laboratory Corporation of America, LabCorp
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

Variant summary: The TPP1 c.509-1G>C variant (also known as G3556C) involves the alteration of a highly conserved nucleotide at canonical splice acceptor site in intron 5. 5/5 splice prediction tools predict abrogation of the splice-site. This variant was found in 43/121262 control chromosomes from ExAC at a frequency of 0.0003546, which does not exceed the estimated maximal expected allele frequency of a pathogenic TPP1 variant (0.002958). This variant is one of the most common pathogenic variants associated with LINCL and is found in both the homozygous and compound heterozygous state, including evidence of cosegregation with disease (Sleat_ 1999; Ju_2002; Worgall_2007). Enzyme activity in the in patients carrying this variant was very low to absent, suggesting it leads to loss of protein function (Sleat_1999). In addition, several clinical diagnostic laboratories/reputable databases have classified this variant as pathogenic. Taken together, this variant is classified as pathogenic.

Autosomal recessive spinocerebellar ataxia 7 Pathogenic:1
May 01, 2013
OMIM
Significance:Pathogenic
Review Status:no assertion criteria provided
Collection Method:literature only

Inborn genetic diseases Pathogenic:1
Jul 01, 2024
Ambry Genetics
Significance:Pathogenic
Review Status:criteria provided, single submitter
Collection Method:clinical testing

The c.509-1G>C intronic alteration consists of a G to C substitution one nucleotide before exon 6 of the TPP1 gene. Alterations that disrupt the canonical splice site are expected to cause aberrant splicing, resulting in an abnormal protein or a transcript that is subject to nonsense-mediated mRNA decay. Based on data from gnomAD, the C allele has an overall frequency of 0.04% (113/282698) total alleles studied. The highest observed frequency was 0.081% (105/129070) of European (non-Finnish) alleles. This alteration was detected in the homozygous state, and in conjunction with another alteration in TPP1, in multiple individuals with autosomal recessive TPP1-related neuronal ceroid lipofuscinosis (Zhong, 1998; Sleat, 1999; Steinfeld, 2002; Moore, 2008; Dy, 2015; Helbig, 2016; Bowling, 2017; Butler, 2017; Balciuniene, 2019; Costain, 2019; Amadori, 2020). This nucleotide position is highly conserved in available vertebrate species. In an assay testing TPP1 function, this variant showed a functionally abnormal result (Ma, 2021). In silico splice site analysis predicts that this alteration will weaken the native splice acceptor site and may result in the creation or strengthening of a novel splice acceptor site. Based on the available evidence, this alteration is classified as pathogenic.

TPP1-related disorder Pathogenic:1
Feb 28, 2024
PreventionGenetics, part of Exact Sciences
Significance:Pathogenic
Review Status:no assertion criteria provided
Collection Method:clinical testing

The TPP1 c.509-1G>C variant is predicted to disrupt the AG splice acceptor site and interfere with normal splicing. This variant (also known as G3556C) has been reported as causative for neuronal ceroid lipofuscinosis in the homozygous and compound heterozygous states (Sleat et al. 1997. PubMed ID: 9295267; Sleat et al. 1999. PubMed ID: 10330339; Miller et al. 2013. PubMed ID: 23539563). This variant is reported in 0.081% of alleles in individuals of European (Non-Finnish) descent in gnomAD. Variants that disrupt the consensus splice acceptor site in TPP1 are expected to be pathogenic. This variant is interpreted as pathogenic.

Computational scores

Source: dbNSFP v4.9

Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
0.31
D
BayesDel_noAF
Pathogenic
0.15
CADD
Pathogenic
31
DANN
Uncertain
0.99
Eigen
Pathogenic
1.0
Eigen_PC
Pathogenic
0.85
FATHMM_MKL
Pathogenic
0.98
D
PhyloP100
4.6
GERP RS
4.4
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.7
Mutation Taster
=0/100
disease causing (ClinVar)

Splicing

Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
1.0
dbscSNV1_RF
Pathogenic
0.94
SpliceAI score (max)
0.96
Details are displayed if max score is > 0.2
DS_AG_spliceai
0.24
Position offset: -41
DS_AL_spliceai
0.96
Position offset: -1

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

Publications

Other links and lift over

dbSNP: rs56144125; hg19: chr11-6638385; COSMIC: COSV99067420; COSMIC: COSV99067420; API