NM_001082538.3:c.585C>T

Variant names:

• chr12-110628879-C-T
• rs774402021
• NM_001082538.3:c.585C>T

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_001082538.3(TCTN1):​c.585C>T​(p.Phe195Phe) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000684 in 1,461,466 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 (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000068 (0 hom.)
• Consequence: TCTN1 NM_001082538.3 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.679
• Publications: 0 publications found

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]

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]

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.72).
• BP6: Variant 12-110628879-C-T is Benign according to our data. Variant chr12-110628879-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1630134.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-0.679 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001082538.3. 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
	TCTN1	NM_001082538.3	MANE Select	c.585C>T	p.Phe195Phe	synonymous	Exon 4 of 15	NP_001076007.1	Q2MV58-2
	TCTN1	NM_001082537.3		c.585C>T	p.Phe195Phe	synonymous	Exon 4 of 15	NP_001076006.1	Q2MV58-1
	TCTN1	NM_024549.6		c.585C>T	p.Phe195Phe	synonymous	Exon 4 of 15	NP_078825.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TCTN1	ENST00000397659.9	TSL:1 MANE Select	c.585C>T	p.Phe195Phe	synonymous	Exon 4 of 15	ENSP00000380779.4	Q2MV58-2
	TCTN1	ENST00000551590.5	TSL:1	c.585C>T	p.Phe195Phe	synonymous	Exon 4 of 15	ENSP00000448735.1	Q2MV58-1
	TCTN1	ENST00000397655.7	TSL:1	c.585C>T	p.Phe195Phe	synonymous	Exon 4 of 15	ENSP00000380775.3	Q2MV58-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000401 AC: 1 AN: 249258 AF XY: 0.00

Gnomad AFR exome AF: 0.00

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: 0.00000884

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000684 AC: 10 AN: 1461466 Hom.: 0 Cov.: 31 AF XY: 0.00000688 AC XY: 5 AN XY: 727066

African (AFR) AF: 0.00 AC: 0 AN: 33470

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26124

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39630

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53196

Middle Eastern (MID) AF: 0.000347 AC: 2 AN: 5764

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111924

Other (OTH) AF: 0.0000497 AC: 3 AN: 60382

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

Asia WGS AF: 0.00115 AC: 4 AN: 3476

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Meckel-Gruber syndrome;C5979921:Joubert syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.72
CADD	Benign	5.5
DANN	Benign	0.77
PhyloP100		-0.68
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs774402021; hg19: chr12-111066684;