12-110645014-G-C

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001082538.3(TCTN1):c.1379G>C(p.Ser460Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000449 in 1,614,238 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0023 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00025 ( 2 hom. )

Consequence

TCTN1
NM_001082538.3 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.258

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]

TCTN1 links:

HVCN1 (HGNC:28240): (hydrogen voltage gated channel 1) This gene encodes a voltage-gated protein channel protein expressed more highly in certain cells of the immune system. Phagocytic cells produce superoxide anions which require this channel protein, and in B cells this same process facilitates antibody production. This same channel protein, however, can also regulate functions in other cells including spermatozoa. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2012]

HVCN1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.00499174).

BP6

Variant 12-110645014-G-C is Benign according to our data. Variant chr12-110645014-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 194021.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00231 (352/152348) while in subpopulation AFR AF= 0.00789 (328/41572). AF 95% confidence interval is 0.00719. There are 1 homozygotes in gnomad4. There are 167 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TCTN1	NM_001082538.3 link	c.1379G>C	p.Ser460Thr	missense_variant	Exon 12 of 15	ENST00000397659.9	NP_001076007.1	Q2MV58-2B4DIB9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TCTN1	ENST00000397659.9 link	c.1379G>C	p.Ser460Thr	missense_variant	Exon 12 of 15	1	NM_001082538.3	ENSP00000380779.4	Q2MV58-2
TCTN1	ENST00000551590.5 link	c.1379G>C	p.Ser460Thr	missense_variant	Exon 12 of 15	1		ENSP00000448735.1	Q2MV58-1
TCTN1	ENST00000397655.7 link	c.1337G>C	p.Ser446Thr	missense_variant	Exon 12 of 15	1		ENSP00000380775.3	Q2MV58-3
TCTN1	ENST00000397656.8 link	n.*1012G>C		non_coding_transcript_exon_variant	Exon 13 of 16	2		ENSP00000380776.4	J3KPW2
TCTN1	ENST00000480648.5 link	n.*655G>C		non_coding_transcript_exon_variant	Exon 13 of 16	5		ENSP00000437196.1	E9PNE4
TCTN1	ENST00000495659.6 link	n.*1137G>C		non_coding_transcript_exon_variant	Exon 12 of 15	2		ENSP00000436673.2	E9PIB8
TCTN1	ENST00000397656.8 link	n.*1012G>C		3_prime_UTR_variant	Exon 13 of 16	2		ENSP00000380776.4	J3KPW2
TCTN1	ENST00000480648.5 link	n.*655G>C		3_prime_UTR_variant	Exon 13 of 16	5		ENSP00000437196.1	E9PNE4
TCTN1	ENST00000495659.6 link	n.*1137G>C		3_prime_UTR_variant	Exon 12 of 15	2		ENSP00000436673.2	E9PIB8

Frequencies

GnomAD3 genomes

AF:

0.00231

AC:

352

AN:

152230

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00791

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000850

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00239

GnomAD3 exomes

AF:

0.000581

AC:

145

AN:

249560

Hom.:

AF XY:

0.000554

AC XY:

AN XY:

135400

show subpopulations

Gnomad AFR exome

AF:

0.00762

Gnomad AMR exome

AF:

0.000405

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000794

Gnomad OTH exome

AF:

0.000660

GnomAD4 exome

AF:

0.000254

AC:

372

AN:

1461890

Hom.:

Cov.:

AF XY:

0.000230

AC XY:

167

AN XY:

727246

show subpopulations

Gnomad4 AFR exome

AF:

0.00833

Gnomad4 AMR exome

AF:

0.000514

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000369

Gnomad4 OTH exome

AF:

0.000397

GnomAD4 genome

AF:

0.00231

AC:

352

AN:

152348

Hom.:

Cov.:

AF XY:

0.00224

AC XY:

167

AN XY:

74500

show subpopulations

Gnomad4 AFR

AF:

0.00789

Gnomad4 AMR

AF:

0.000849

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00237

Alfa

AF:

0.000484

Hom.:

Bravo

AF:

0.00262

ESP6500AA

AF:

0.00589

AC:

ESP6500EA

AF:

0.000122

AC:

ExAC

AF:

0.000704

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Jul 03, 2019

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Benign:1

Jun 04, 2015

Eurofins Ntd Llc (ga)

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Meckel-Gruber syndrome;C0431399:Joubert syndrome

Benign:1

Feb 03, 2025

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

AlphaMissense

Benign

0.097

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.42

CADD

Benign

7.7

DANN

Benign

0.50

DEOGEN2

Benign

0.087

.;T;.;.;.

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.17

LIST_S2

Benign

0.58

T;T;T;T;T

MetaRNN

Benign

0.0050

T;T;T;T;T

MetaSVM

Benign

-0.99

MutationAssessor

Benign

0.89

.;L;.;L;.

PrimateAI

Benign

0.27

PROVEAN

Benign

-0.95

.;N;N;N;.

REVEL

Benign

0.14

Sift

Benign

0.27

.;T;T;T;.

Sift4G

Benign

0.48

T;T;T;T;T

Polyphen

0.0040, 0.0060, 0.0030

.;B;B;B;.

Vest4

0.14

MVP

0.46

MPC

0.18

ClinPred

0.0011

GERP RS

-0.14

Varity_R

0.065

gMVP

0.31

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over