dbSNP rs145786276: TTC22:p.Arg300Leu (chr1-54786104-C-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

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

The NM_001114108.2(TTC22):c.899G>T(p.Arg300Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000547 in 1,461,816 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. 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. R300H) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

TTC22
NM_001114108.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.06

Publications

5 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:

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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=0.19823077).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TTC22	NM_001114108.2 link	c.899G>T	p.Arg300Leu	missense_variant	Exon 5 of 7	ENST00000371276.9	NP_001107580.1	Q5TAA0-1
TTC22	NM_017904.4 link	c.899G>T	p.Arg300Leu	missense_variant	Exon 5 of 6		NP_060374.2	Q5TAA0-2
TTC22	XM_011541671.3 link	c.899G>T	p.Arg300Leu	missense_variant	Exon 5 of 6		XP_011539973.1
TTC22	XM_017001582.2 link	c.326G>T	p.Arg109Leu	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.899G>T	p.Arg300Leu	missense_variant	Exon 5 of 7	5	NM_001114108.2	ENSP00000360323.4	Q5TAA0-1
TTC22	ENST00000371274.8 link	c.899G>T	p.Arg300Leu	missense_variant	Exon 5 of 6	2		ENSP00000360321.4	Q5TAA0-2
TTC22	ENST00000448308.2 link	c.242G>T	p.Arg81Leu	missense_variant	Exon 3 of 4	3		ENSP00000390300.2	H0Y486
TTC22	ENST00000488771.1 link	n.1892G>T		non_coding_transcript_exon_variant	Exon 1 of 3	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000795

AC:

AN:

251426

AF XY:

0.00000736

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:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000547

AC:

AN:

1461816

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727212

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000719

AC:

AN:

1111962

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.22

BayesDel_addAF

Benign

-0.072

BayesDel_noAF

Benign

-0.33

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.12

T;.;.

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.082

FATHMM_MKL

Uncertain

0.82

LIST_S2

Benign

0.78

T;T;T

M_CAP

Benign

0.039

MetaRNN

Benign

0.20

T;T;T

MetaSVM

Benign

-0.83

MutationAssessor

Benign

1.4

L;L;.

PhyloP100

2.1

PrimateAI

Benign

0.31

PROVEAN

Uncertain

-3.7

D;D;D

REVEL

Benign

0.056

Sift

Benign

0.14

T;T;T

Sift4G

Benign

0.52

T;T;T

Polyphen

0.0080

B;B;.

Vest4

0.49

MutPred

0.39

Gain of ubiquitination at K303 (P = 0.0445);Gain of ubiquitination at K303 (P = 0.0445);.;

MVP

0.54

MPC

0.89

ClinPred

0.93

GERP RS

3.6

Varity_R

0.19

gMVP

0.63

Mutation Taster

=85/15

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over