Genetic Variant TTC22:p.Ala334Gly (chr1-54786002-G-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_001114108.2(TTC22):c.1001C>G(p.Ala334Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A334V) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

TTC22
NM_001114108.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 8.72

Publications

2 publications found

Variant links:

Genes affected

TTC22 (HGNC:26067): (tetratricopeptide repeat domain 22) This gene encodes a protein with seven tetratricopeptide (TPR) repeats. Tetratricopeptide repeat containing motifs are found in a variety of proteins and may mediate protein-protein interactions and chaperone activity. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jun 2011]

TTC22 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.3685434).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TTC22	NM_001114108.2 link	c.1001C>G	p.Ala334Gly	missense_variant	Exon 5 of 7	ENST00000371276.9	NP_001107580.1	Q5TAA0-1
TTC22	NM_017904.4 link	c.1001C>G	p.Ala334Gly	missense_variant	Exon 5 of 6		NP_060374.2	Q5TAA0-2
TTC22	XM_011541671.3 link	c.1001C>G	p.Ala334Gly	missense_variant	Exon 5 of 6		XP_011539973.1
TTC22	XM_017001582.2 link	c.428C>G	p.Ala143Gly	missense_variant	Exon 5 of 7		XP_016857071.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TTC22	ENST00000371276.9 link	c.1001C>G	p.Ala334Gly	missense_variant	Exon 5 of 7	5	NM_001114108.2	ENSP00000360323.4	Q5TAA0-1
TTC22	ENST00000371274.8 link	c.1001C>G	p.Ala334Gly	missense_variant	Exon 5 of 6	2		ENSP00000360321.4	Q5TAA0-2
TTC22	ENST00000448308.2 link	c.344C>G	p.Ala115Gly	missense_variant	Exon 3 of 4	3		ENSP00000390300.2	H0Y486
TTC22	ENST00000488771.1 link	n.1994C>G		non_coding_transcript_exon_variant	Exon 1 of 3	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000404

AC:

AN:

247648

AF XY:

0.00000744

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000896

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000137

AC:

AN:

1460310

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726444

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44650

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26106

East Asian (EAS)

AF:

0.00

AC:

AN:

39660

South Asian (SAS)

AF:

0.00

AC:

AN:

86204

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52598

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5702

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111702

Other (OTH)

AF:

0.0000166

AC:

AN:

60220

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ExAC

AF:

0.000165

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Benign

-0.043

BayesDel_noAF

Benign

-0.12

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.14

T;.;.

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.82

T;T;D

M_CAP

Benign

0.044

MetaRNN

Benign

0.37

T;T;T

MetaSVM

Uncertain

0.058

MutationAssessor

Uncertain

2.2

M;M;.

PhyloP100

8.7

PrimateAI

Benign

0.43

PROVEAN

Uncertain

-2.6

D;N;D

REVEL

Benign

0.26

Sift

Uncertain

0.015

D;D;D

Sift4G

Uncertain

0.032

D;D;D

Polyphen

1.0

D;D;.

Vest4

0.69

MutPred

0.24

Loss of stability (P = 0.1361);Loss of stability (P = 0.1361);.;

MVP

0.74

MPC

0.96

ClinPred

0.92

GERP RS

4.2

Varity_R

0.42

gMVP

0.54

Mutation Taster

=54/46

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

Details are displayed if max score is > 0.2

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

Publications

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chr1-54786002-G-C

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over