rs114202807

Variant names:

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS1

The NM_020458.4(TTC7A):c.1337C>T(p.Ser446Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00037 in 1,612,450 control chromosomes in the GnomAD database, including 1 homozygotes. 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 Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. S446S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0019 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00021 ( 0 hom. )

Consequence

TTC7A
NM_020458.4 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 2.48

Publications

4 publications found

Variant links:

Genes affected

TTC7A (HGNC:19750): (tetratricopeptide repeat domain 7A) This gene encodes a protein containing tetratricopeptide repeats. Mutations in this gene disrupt intestinal development and can cause early onset inflammatory bowel disease and intestinal atresia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jun 2014]

TTC7A Gene-Disease associations (from GenCC):

gastrointestinal defects and immunodeficiency syndrome 1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
multiple intestinal atresia
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, Ambry Genetics

TTC7A links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -16 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.008100599).

BP6

Variant 2-47011380-C-T is Benign according to our data. Variant chr2-47011380-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 528475.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00194 (296/152314) while in subpopulation AFR AF = 0.00671 (279/41572). AF 95% confidence interval is 0.00606. There are 1 homozygotes in GnomAd4. There are 143 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TTC7A	NM_020458.4 link	c.1337C>T	p.Ser446Leu	missense_variant	Exon 11 of 20	ENST00000319190.11	NP_065191.2	Q9ULT0-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TTC7A	ENST00000319190.11 link	c.1337C>T	p.Ser446Leu	missense_variant	Exon 11 of 20	2	NM_020458.4	ENSP00000316699.5		Q9ULT0-1

Frequencies

GnomAD3 genomes

AF:

0.00194

AC:

296

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00673

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000524

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00239

GnomAD2 exomes

AF:

0.000464

AC:

116

AN:

249764

AF XY:

0.000303

show subpopulations

Gnomad AFR exome

AF:

0.00641

Gnomad AMR exome

AF:

0.000232

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000206

AC:

301

AN:

1460136

Hom.:

Cov.:

AF XY:

0.000180

AC XY:

131

AN XY:

726452

show subpopulations

African (AFR)

AF:

0.00750

AC:

251

AN:

33478

American (AMR)

AF:

0.000313

AC:

AN:

44710

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000812

AC:

AN:

86202

European-Finnish (FIN)

AF:

0.0000386

AC:

AN:

51852

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00000899

AC:

AN:

1111928

Other (OTH)

AF:

0.000248

AC:

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.468

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00194

AC:

296

AN:

152314

Hom.:

Cov.:

AF XY:

0.00192

AC XY:

143

AN XY:

74476

show subpopulations

African (AFR)

AF:

0.00671

AC:

279

AN:

41572

American (AMR)

AF:

0.000523

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.000193

AC:

AN:

5178

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68030

Other (OTH)

AF:

0.00237

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000888

Hom.:

Bravo

AF:

0.00209

ESP6500AA

AF:

0.00613

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000610

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

TTC7A-related disorder

Benign:1

Jul 08, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

not provided

Benign:1

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Multiple gastrointestinal atresias

Benign:1

Dec 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.078

BayesDel_addAF

Benign

-0.40

BayesDel_noAF

Benign

-0.34

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.38

.;T;.

Eigen

Benign

-0.16

Eigen_PC

Benign

-0.15

FATHMM_MKL

Benign

0.60

LIST_S2

Benign

0.84

T;D;D

M_CAP

Benign

0.025

MetaRNN

Benign

0.0081

T;T;T

MetaSVM

Benign

-0.71

MutationAssessor

Benign

0.76

.;N;N

PhyloP100

2.5

PrimateAI

Uncertain

0.53

PROVEAN

Uncertain

-3.4

D;D;D

REVEL

Benign

0.098

Sift

Benign

0.040

D;D;D

Sift4G

Benign

0.11

T;T;T

Polyphen

0.73

P;P;.

Vest4

0.43

MVP

0.58

MPC

0.15

ClinPred

0.046

GERP RS

3.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.18

gMVP

0.10

Mutation Taster

=96/4

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over