Variant chr2-74490080-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_022492.6(TTC31):c.185G>A(p.Arg62Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000021 in 1,526,566 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000020 ( 0 hom. )

Consequence

TTC31
NM_022492.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.637

Variant links:

Genes affected

TTC31 (HGNC:25759): (tetratricopeptide repeat domain 31)

TTC31 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.026815772).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TTC31	NM_022492.6 linkuse as main transcript	c.185G>A	p.Arg62Gln	missense_variant	3/13	ENST00000233623.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TTC31	ENST00000233623.11 linkuse as main transcript	c.185G>A	p.Arg62Gln	missense_variant	3/13	1	NM_022492.6	P1	Q49AM3-1

Frequencies

GnomAD3 genomes

AF:

0.0000335

AC:

AN:

149436

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000978

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000290

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000294

AC:

AN:

204354

Hom.:

AF XY:

0.0000363

AC XY:

AN XY:

110042

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000218

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000739

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000223

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000196

AC:

AN:

1377130

Hom.:

Cov.:

AF XY:

0.0000249

AC XY:

AN XY:

682790

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.000687

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000484

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000376

Gnomad4 OTH exome

AF:

0.0000542

GnomAD4 genome

AF:

0.0000335

AC:

AN:

149436

Hom.:

Cov.:

AF XY:

0.0000137

AC XY:

AN XY:

72968

show subpopulations

Gnomad4 AFR

AF:

0.0000978

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.000290

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000675

Hom.:

Bravo

AF:

0.0000416

ExAC

AF:

0.0000332

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

Apr 04, 2024

The c.185G>A (p.R62Q) alteration is located in exon 3 (coding exon 3) of the TTC31 gene. This alteration results from a G to A substitution at nucleotide position 185, causing the arginine (R) at amino acid position 62 to be replaced by a glutamine (Q). 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

0.072

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.59

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.0049

.;.;T

Eigen

Benign

-0.96

Eigen_PC

Benign

-0.92

FATHMM_MKL

Benign

0.022

LIST_S2

Benign

0.75

T;T;T

M_CAP

Benign

0.0031

MetaRNN

Benign

0.027

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

L;.;L

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.25

PROVEAN

Benign

-1.1

.;N;N

REVEL

Benign

0.066

Sift

Benign

0.35

.;T;T

Sift4G

Benign

0.46

T;T;T

Polyphen

0.023

.;.;B

Vest4

0.24

MVP

0.15

MPC

0.098

ClinPred

0.057

GERP RS

-1.2

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.0

Varity_R

0.025

gMVP

0.28

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

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