10-95685585-C-T

Variant names:

• chr10-95685585-C-T
• rs793888508
• NM_015631.6:c.940G>A

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3 PP5

The NM_015631.6(TCTN3):​c.940G>A​(p.Gly314Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000143 in 1,399,184 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: TCTN3 NM_015631.6 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 4.20
• Publications: 5 publications found

Genes affected

TCTN3 (HGNC:24519): (tectonic family member 3) This gene encodes a member of the tectonic gene family which functions in Hedgehog signal transduction and development of the neural tube. Mutations in this gene have been associated with Orofaciodigital Syndrome IV and Joubert Syndrom 18. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Sep 2012]

TCTN3 Gene-Disease associations (from GenCC):

• ciliopathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• orofaciodigital syndrome IV

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae), Orphanet, G2P, PanelApp Australia
• Joubert syndrome 18

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia
• Meckel syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• orofaciodigital syndrome type 6

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 10-95685585-C-T is Pathogenic according to our data. Variant chr10-95685585-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 37061.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015631.6. 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
	TCTN3	NM_015631.6	MANE Select	c.940G>A	p.Gly314Arg	missense	Exon 8 of 14	NP_056446.4	Q6NUS6-1
	TCTN3	NM_001410982.1		c.888+910G>A		intron	N/A	NP_001397911.1	A0A7P0TB57
	TCTN3	NM_001143973.2		c.651+910G>A		intron	N/A	NP_001137445.1	Q6NUS6-5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TCTN3	ENST00000371217.10	TSL:1 MANE Select	c.940G>A	p.Gly314Arg	missense	Exon 8 of 14	ENSP00000360261.5	Q6NUS6-1
	TCTN3	ENST00000265993.13	TSL:1	c.994G>A	p.Gly332Arg	missense	Exon 8 of 14	ENSP00000265993.9	A0A0C4DFN5
	TCTN3	ENST00000614499.5	TSL:1	c.994G>A	p.Gly332Arg	missense	Exon 8 of 14	ENSP00000483364.2	A0A804G9W2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000143 AC: 2 AN: 1399184 Hom.: 0 Cov.: 30 AF XY: 0.00000290 AC XY: 2 AN XY: 690094

African (AFR) AF: 0.00 AC: 0 AN: 31598

American (AMR) AF: 0.00 AC: 0 AN: 35704

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25168

East Asian (EAS) AF: 0.00 AC: 0 AN: 35716

South Asian (SAS) AF: 0.00 AC: 0 AN: 79228

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49240

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5698

European-Non Finnish (NFE) AF: 9.27e-7 AC: 1 AN: 1078838

Other (OTH) AF: 0.0000172 AC: 1 AN: 57994

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Joubert syndrome 18 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Pathogenic	0.41	D
BayesDel_noAF	Pathogenic	0.35
CADD	Uncertain	25
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.28	T
Eigen	Uncertain	0.67
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.76	T
M_CAP	Uncertain	0.21	D
MetaRNN	Pathogenic	0.90	D
MetaSVM	Uncertain	0.29	D
MutationAssessor	Pathogenic	3.1	M
PhyloP100		4.2
PrimateAI	Uncertain	0.51	T
PROVEAN	Pathogenic	-4.8	D
REVEL	Pathogenic	0.72
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0050	D
Polyphen		0.98	D
Vest4		0.88
MutPred		0.71		Gain of solvent accessibility (P = 0.0055)
MVP		0.95
MPC		0.58
ClinPred		0.98	D
GERP RS		5.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.15
gMVP		0.52
Mutation Taster		=11/89	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.53		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.53		Position offset: -29

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

Other links and lift over

dbSNP: rs793888508; hg19: chr10-97445342;