chr17-15308671-G-C

Position:

• chr17-15308671-G-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_031898.3(TEKT3):​c.1249C>G​(p.Gln417Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000138 in 1,454,308 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 Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: TEKT3 NM_031898.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.96

Genes affected

TEKT3 (HGNC:14293): (tektin 3) This gene product belongs to the tektin family of proteins. Tektins comprise a family of filament-forming proteins that are coassembled with tubulins to form ciliary and flagellar microtubules. The exact function of this gene is not known. [provided by RefSeq, Jul 2008]

(HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.961

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TEKT3	NM_031898.3	c.1249C>G	p.Gln417Glu	missense_variant	8/9	ENST00000395930.6
LOC124903932	XR_007065633.1	n.676+811G>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TEKT3	ENST00000395930.6	c.1249C>G	p.Gln417Glu	missense_variant	8/9	1	NM_031898.3	P1
	ENST00000654786.1	n.337+811G>C		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000138 AC: 2 AN: 1454308 Hom.: 0 Cov.: 31 AF XY: 0.00000277 AC XY: 2 AN XY: 722058

Gnomad4 AFR exome AF: 0.0000300

Gnomad4 AMR exome AF: 0.00

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: 0.00

Gnomad4 OTH exome AF: 0.0000167

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 24, 2024

The c.1249C>G (p.Q417E) alteration is located in exon 8 (coding exon 6) of the TEKT3 gene. This alteration results from a C to G substitution at nucleotide position 1249, causing the glutamine (Q) at amino acid position 417 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
BayesDel_addAF	Benign	-0.043	T
BayesDel_noAF	Benign	-0.30
CADD	Uncertain	24
DANN	Benign	0.75
DEOGEN2	Benign	0.19	T;T
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.91	.;D
M_CAP	Benign	0.015	T
MetaRNN	Pathogenic	0.96	D;D
MetaSVM	Benign	-1.2	T
MutationAssessor	Pathogenic	3.1	M;M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.58	T
PROVEAN	Uncertain	-2.5	N;N
REVEL	Uncertain	0.34
Sift	Uncertain	0.010	D;D
Sift4G	Uncertain	0.018	D;D
Polyphen		0.71	P;P
Vest4		0.64
MutPred		0.91		Loss of MoRF binding (P = 0.0806);Loss of MoRF binding (P = 0.0806);
MVP		0.67
MPC		0.51
ClinPred		0.91	D
GERP RS		5.3
Varity_R		0.75
gMVP		0.66

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

Other links and lift over

dbSNP: rs1910638272; hg19: chr17-15211988;