chr3-9812985-C-T

Position:

chr3-9812985-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001387467.1(TTLL3):c.-813C>T variant causes a 5 prime UTR premature start codon gain change. The variant allele was found at a frequency of 0.000013 in 1,539,618 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: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000013 ( 0 hom. )

Consequence

TTLL3
NM_001387467.1 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.98

Variant links:

Genes affected

TTLL3 (HGNC:24483): (tubulin tyrosine ligase like 3) Enables protein-glycine ligase activity. Predicted to be involved in axoneme assembly and flagellated sperm motility. Predicted to be located in axoneme; microtubule cytoskeleton; and sperm flagellum. [provided by Alliance of Genome Resources, Apr 2022]

TTLL3 links:

ARPC4-TTLL3 (HGNC:38830): (ARPC4-TTLL3 readthrough) This locus represents naturally occurring read-through transcription between the neighboring ARPC4 (actin related protein 2/3 complex, subunit 4) and TTLL3 (tubulin tyrosine ligase-like family, member 3) genes. The read-through transcript encodes a fusion protein that shares sequence identity with each individual gene product. [provided by RefSeq, Nov 2010]

ARPC4-TTLL3 links:

TTLL3 (HGNC:):

TTLL3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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, 0.967

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TTLL3	NM_001387446.1 linkuse as main transcript	c.91C>T	p.Arg31Trp	missense_variant	3/14	ENST00000685419.1	NP_001374375.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TTLL3	ENST00000685419.1 linkuse as main transcript	c.91C>T	p.Arg31Trp	missense_variant	3/14		NM_001387446.1	ENSP00000510679.1		A0A8I5KXU2
ARPC4-TTLL3	ENST00000397256.5 linkuse as main transcript	c.373C>T	p.Arg125Trp	missense_variant	5/12	5		ENSP00000380427.1		A0A0A6YYG9

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152228

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000305

AC:

AN:

196962

Hom.:

AF XY:

0.0000378

AC XY:

AN XY:

105722

show subpopulations

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 SAS exome

AF:

0.000153

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000318

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000130

AC:

AN:

1387390

Hom.:

Cov.:

AF XY:

0.0000132

AC XY:

AN XY:

682718

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000668

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000121

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152228

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74366

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000189

ExAC

AF:

0.0000249

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 17, 2022

The c.373C>T (p.R125W) alteration is located in exon 5 (coding exon 5) of the ARPC4-TTLL3 gene. This alteration results from a C to T substitution at nucleotide position 373, causing the arginine (R) at amino acid position 125 to be replaced by a tryptophan (W). 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

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Pathogenic

0.18

CADD

Pathogenic

DANN

Pathogenic

1.0

Eigen

Pathogenic

0.70

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.94

D;D;D;D;D;D;D;D;D;D;D;D

M_CAP

Benign

0.081

MetaRNN

Pathogenic

0.97

D;D;D;D;D;D;D;D;D;D;D;D

MetaSVM

Uncertain

-0.28

PrimateAI

Uncertain

0.67

PROVEAN

Pathogenic

-6.9

D;D;D;D;D;D;D;D;D;D;D;D

REVEL

Uncertain

0.54

Sift

Pathogenic

0.0

D;D;D;D;D;D;D;D;D;D;D;D

Sift4G

Pathogenic

0.0010

D;D;D;D;D;D;D;D;D;D;D;D

Vest4

0.88

MutPred

0.85

.;Loss of MoRF binding (P = 0.0572);Loss of MoRF binding (P = 0.0572);Loss of MoRF binding (P = 0.0572);.;Loss of MoRF binding (P = 0.0572);Loss of MoRF binding (P = 0.0572);Loss of MoRF binding (P = 0.0572);Loss of MoRF binding (P = 0.0572);.;Loss of MoRF binding (P = 0.0572);Loss of MoRF binding (P = 0.0572);

MVP

0.49

MPC

0.41

ClinPred

0.98

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

gMVP

0.69

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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