rs777519512

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 2P and 13B. PM2BP4_StrongBP6_Very_StrongBP7

The NM_001082538.3(TCTN1):​c.84G>A​(p.Pro28Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000113 in 1,595,654 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 benign (★★). Synonymous variant affecting the same amino acid position (i.e. P28P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 31)
Exomes 𝑓: 0.0000076 ( 0 hom. )

Consequence

TCTN1
NM_001082538.3 synonymous

Scores

2

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.881
Variant links:
Genes affected
TCTN1 (HGNC:26113): (tectonic family member 1) This gene encodes a member of a family of secreted and transmembrane proteins. The orthologous gene in mouse functions downstream of smoothened and rab23 to modulate hedgehog signal transduction. This protein is a component of the tectonic-like complex, which forms a barrier between the ciliary axoneme and the basal body. A mutation in this gene was found in a family with Joubert syndrome-13. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2016]

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -11 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.55).
BP6
Variant 12-110614266-G-A is Benign according to our data. Variant chr12-110614266-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 1509640.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
BP7
Synonymous conserved (PhyloP=-0.881 with no splicing effect.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
TCTN1NM_001082538.3 linkc.84G>A p.Pro28Pro synonymous_variant Exon 1 of 15 ENST00000397659.9 NP_001076007.1 Q2MV58-2B4DIB9

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
TCTN1ENST00000397659.9 linkc.84G>A p.Pro28Pro synonymous_variant Exon 1 of 15 1 NM_001082538.3 ENSP00000380779.4 Q2MV58-2
TCTN1ENST00000551590.5 linkc.84G>A p.Pro28Pro synonymous_variant Exon 1 of 15 1 ENSP00000448735.1 Q2MV58-1
TCTN1ENST00000397655.7 linkc.84G>A p.Pro28Pro synonymous_variant Exon 1 of 15 1 ENSP00000380775.3 Q2MV58-3
TCTN1ENST00000397656.8 linkn.84G>A non_coding_transcript_exon_variant Exon 1 of 16 2 ENSP00000380776.4 J3KPW2
TCTN1ENST00000480648.5 linkn.84G>A non_coding_transcript_exon_variant Exon 1 of 16 5 ENSP00000437196.1 E9PNE4
TCTN1ENST00000495659.6 linkn.84G>A non_coding_transcript_exon_variant Exon 1 of 15 2 ENSP00000436673.2 E9PIB8

Frequencies

GnomAD3 genomes
AF:
0.0000460
AC:
7
AN:
152212
Hom.:
0
Cov.:
31
show subpopulations
Gnomad AFR
AF:
0.000145
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.00
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:
0.0000147
Gnomad OTH
AF:
0.00
GnomAD2 exomes
AF:
0.0000331
AC:
7
AN:
211352
AF XY:
0.0000260
show subpopulations
Gnomad AFR exome
AF:
0.000338
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:
0.0000108
Gnomad OTH exome
AF:
0.000383
GnomAD4 exome
AF:
0.00000762
AC:
11
AN:
1443442
Hom.:
0
Cov.:
31
AF XY:
0.00000838
AC XY:
6
AN XY:
716404
show subpopulations
African (AFR)
AF:
0.000120
AC:
4
AN:
33300
American (AMR)
AF:
0.00
AC:
0
AN:
41874
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
25584
East Asian (EAS)
AF:
0.0000256
AC:
1
AN:
39050
South Asian (SAS)
AF:
0.00
AC:
0
AN:
83372
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
50920
Middle Eastern (MID)
AF:
0.00
AC:
0
AN:
5726
European-Non Finnish (NFE)
AF:
0.00000453
AC:
5
AN:
1103906
Other (OTH)
AF:
0.0000167
AC:
1
AN:
59710
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.489
Heterozygous variant carriers
0
1
2
4
5
6
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance

Age Distribution

Exome 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
GnomAD4 genome
AF:
0.0000460
AC:
7
AN:
152212
Hom.:
0
Cov.:
31
AF XY:
0.0000538
AC XY:
4
AN XY:
74358
show subpopulations
African (AFR)
AF:
0.000145
AC:
6
AN:
41466
American (AMR)
AF:
0.00
AC:
0
AN:
15282
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
3468
East Asian (EAS)
AF:
0.00
AC:
0
AN:
5198
South Asian (SAS)
AF:
0.00
AC:
0
AN:
4824
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:
0.0000147
AC:
1
AN:
68030
Other (OTH)
AF:
0.00
AC:
0
AN:
2092
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.511
Heterozygous variant carriers
0
1
2
2
3
4
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance
Alfa
AF:
0.00
Hom.:
0
Bravo
AF:
0.0000604

ClinVar

Significance: Likely benign
Submissions summary: Benign:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

not provided Benign:1
Jun 01, 2024
CeGaT Center for Human Genetics Tuebingen
Significance:Likely benign
Review Status:criteria provided, single submitter
Collection Method:clinical testing

TCTN1: BP4, BP7 -

Meckel-Gruber syndrome;C0431399:Joubert syndrome Benign:1
Dec 26, 2024
Labcorp Genetics (formerly Invitae), Labcorp
Significance:Likely benign
Review Status:criteria provided, single submitter
Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
-0.55
CADD
Benign
11
DANN
Benign
0.92
PhyloP100
-0.88
PromoterAI
-0.087
Neutral
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.0

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

Other links and lift over

dbSNP: rs777519512; hg19: chr12-111052071; API