1-54787800-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001114108.2(TTC22):c.650G>A(p.Gly217Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,566 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G217S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

TTC22
NM_001114108.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.34

Publications

1 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 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.14344439).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TTC22	NM_001114108.2 link	c.650G>A	p.Gly217Asp	missense_variant	Exon 3 of 7	ENST00000371276.9	NP_001107580.1	Q5TAA0-1
TTC22	NM_017904.4 link	c.650G>A	p.Gly217Asp	missense_variant	Exon 3 of 6		NP_060374.2	Q5TAA0-2
TTC22	XM_011541671.3 link	c.650G>A	p.Gly217Asp	missense_variant	Exon 3 of 6		XP_011539973.1
TTC22	XM_017001582.2 link	c.77G>A	p.Gly26Asp	missense_variant	Exon 3 of 7		XP_016857071.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TTC22	ENST00000371276.9 link	c.650G>A	p.Gly217Asp	missense_variant	Exon 3 of 7	5	NM_001114108.2	ENSP00000360323.4		Q5TAA0-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000406

AC:

AN:

246484

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000550

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459566

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

725906

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33410

American (AMR)

AF:

0.00

AC:

AN:

44440

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26042

East Asian (EAS)

AF:

0.0000253

AC:

AN:

39598

South Asian (SAS)

AF:

0.00

AC:

AN:

85830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53214

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111000

Other (OTH)

AF:

0.00

AC:

AN:

60266

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.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 08, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.650G>A (p.G217D) alteration is located in exon 3 (coding exon 3) of the TTC22 gene. This alteration results from a G to A substitution at nucleotide position 650, causing the glycine (G) at amino acid position 217 to be replaced by an aspartic acid (D). 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

0.12

BayesDel_addAF

Benign

-0.092

BayesDel_noAF

Benign

-0.37

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.011

T;.

Eigen

Benign

0.027

Eigen_PC

Benign

0.061

FATHMM_MKL

Benign

0.62

LIST_S2

Benign

0.66

T;T

M_CAP

Benign

0.0097

MetaRNN

Benign

0.14

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.9

L;L

PhyloP100

1.3

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-0.47

N;N

REVEL

Benign

0.12

Sift

Benign

0.50

T;T

Sift4G

Benign

0.86

T;T

Polyphen

0.89

P;P

Vest4

0.34

MutPred

0.26

Gain of sheet (P = 0.0149);Gain of sheet (P = 0.0149);

MVP

0.33

MPC

0.38

ClinPred

0.23

GERP RS

3.6

PromoterAI

-0.013

Neutral

(source)

Varity_R

0.10

gMVP

0.62

Mutation Taster

=89/11

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

1-54787800-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over