Variant 22-46275418-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_017931.4(TTC38):c.536G>A(p.Ser179Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000697 in 1,607,796 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000071 ( 0 hom. )

Consequence

TTC38
NM_017931.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.40

Variant links:

Genes affected

TTC38 (HGNC:26082): (tetratricopeptide repeat domain 38) Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

TTC38 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.10931572).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TTC38	NM_017931.4 linkuse as main transcript	c.536G>A	p.Ser179Asn	missense_variant	5/14	ENST00000381031.8	NP_060401.3	Q5R3I4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
TTC38	ENST00000381031.8 linkuse as main transcript	c.536G>A	p.Ser179Asn	missense_variant	5/14	1	NM_017931.4	ENSP00000370419.3	Q5R3I4
TTC38	ENST00000421359.5 linkuse as main transcript	c.536G>A	p.Ser179Asn	missense_variant	5/7	4		ENSP00000410095.1	A9UJP8
TTC38	ENST00000422713.1 linkuse as main transcript	n.386G>A		non_coding_transcript_exon_variant	3/7	5		ENSP00000406604.1	H7C2L7

Frequencies

GnomAD3 genomes

AF:

0.0000592

AC:

AN:

152146

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000533

AC:

AN:

243924

Hom.:

AF XY:

0.0000302

AC XY:

AN XY:

132434

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000610

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000987

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000708

AC:

103

AN:

1455650

Hom.:

Cov.:

AF XY:

0.0000608

AC XY:

AN XY:

723838

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000466

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000865

Gnomad4 OTH exome

AF:

0.0000665

GnomAD4 genome

AF:

0.0000592

AC:

AN:

152146

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74326

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000559

Hom.:

Bravo

AF:

0.0000529

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000244

AC:

ExAC

AF:

0.0000579

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000178

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

Mar 28, 2023

The c.536G>A (p.S179N) alteration is located in exon 5 (coding exon 5) of the TTC38 gene. This alteration results from a G to A substitution at nucleotide position 536, causing the serine (S) at amino acid position 179 to be replaced by an asparagine (N). 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

0.26

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.50

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.012

T;.

Eigen

Benign

-0.15

Eigen_PC

Benign

0.0065

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.76

T;T

M_CAP

Benign

0.015

MetaRNN

Benign

0.11

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.0

M;.

PrimateAI

Benign

0.46

PROVEAN

Benign

-0.73

N;N

REVEL

Benign

0.022

Sift

Benign

1.0

T;T

Sift4G

Benign

1.0

T;T

Polyphen

0.0080

B;.

Vest4

0.32

MVP

0.19

MPC

0.20

ClinPred

0.088

GERP RS

4.9

Varity_R

0.052

gMVP

0.49

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

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