rs201894544

Positions:

chr12-110645106-A-T

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 2P and 9B. PM2BP4_StrongBP6BS1

The NM_001082538.3(TCTN1):c.1471A>T(p.Ile491Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000244 in 1,614,036 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0013 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

TCTN1
NM_001082538.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:3

Conservation

PhyloP100: -0.802

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 -7 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.0049752593).

BP6

Variant 12-110645106-A-T is Benign according to our data. Variant chr12-110645106-A-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 194019.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Likely_benign=3}.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00132 (201/152220) while in subpopulation AFR AF= 0.00467 (194/41532). AF 95% confidence interval is 0.00413. There are 1 homozygotes in gnomad4. There are 85 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TCTN1	NM_001082538.3 linkuse as main transcript	c.1471A>T	p.Ile491Phe	missense_variant	12/15	ENST00000397659.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TCTN1	ENST00000397659.9 linkuse as main transcript	c.1471A>T	p.Ile491Phe	missense_variant	12/15	1	NM_001082538.3	A1	Q2MV58-2

Frequencies

GnomAD3 genomes

AF:

0.00130

AC:

197

AN:

152102

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00459

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.000956

GnomAD3 exomes

AF:

0.000365

AC:

AN:

249436

Hom.:

AF XY:

0.000259

AC XY:

AN XY:

135332

show subpopulations

Gnomad AFR exome

AF:

0.00497

Gnomad AMR exome

AF:

0.000348

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:

0.00

Gnomad OTH exome

AF:

0.000330

GnomAD4 exome

AF:

0.000132

AC:

193

AN:

1461816

Hom.:

Cov.:

AF XY:

0.000110

AC XY:

AN XY:

727218

show subpopulations

Gnomad4 AFR exome

AF:

0.00490

Gnomad4 AMR exome

AF:

0.000358

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.000199

GnomAD4 genome

AF:

0.00132

AC:

201

AN:

152220

Hom.:

Cov.:

AF XY:

0.00114

AC XY:

AN XY:

74444

show subpopulations

Gnomad4 AFR

AF:

0.00467

Gnomad4 AMR

AF:

0.000261

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.000338

Hom.:

Bravo

AF:

0.00148

ESP6500AA

AF:

0.00356

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000471

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 06, 2014	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 30, 2020	- -

Joubert syndrome 13

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

Apr 02, 2021

- -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

- -

Meckel-Gruber syndrome;C0431399:Familial aplasia of the vermis

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 12, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.091

BayesDel_addAF

Benign

-0.39

BayesDel_noAF

Benign

-0.33

CADD

Benign

0.41

DANN

Benign

0.74

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.087

LIST_S2

Benign

0.58

T;T;T;T;T

M_CAP

Benign

0.044

MetaRNN

Benign

0.0050

T;T;T;T;T

MetaSVM

Benign

-0.93

MutationTaster

Benign

1.0

N;N;N;N;N;N

PrimateAI

Benign

0.29

Sift4G

Benign

0.23

T;T;T;T;T

Polyphen

0.0

.;B;B;B;.

Vest4

0.15

MVP

0.25

MPC

0.31

ClinPred

0.0078

GERP RS

-9.1

Varity_R

0.079

gMVP

0.29

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

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