Genetic Variant NM_017868.4:c.185A>G (chr11-113323414-A-G) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_017868.4(TTC12):c.185A>G(p.Asn62Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000676 in 1,611,336 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00039 ( 1 hom., cov: 32)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

TTC12
NM_017868.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.26

Publications

1 publications found

Variant links:

Genes affected

TTC12 (HGNC:23700): (tetratricopeptide repeat domain 12) Involved in axonemal dynein complex assembly and sperm axoneme assembly. Located in centrosome and cytoplasm. Implicated in primary ciliary dyskinesia 45. [provided by Alliance of Genome Resources, Apr 2022]

TTC12 Gene-Disease associations (from GenCC):

ciliary dyskinesia, primary, 45
Inheritance: AR Classification: STRONG, MODERATE Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
primary ciliary dyskinesia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

TTC12 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.041915298).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TTC12	NM_017868.4 link	c.185A>G	p.Asn62Ser	missense_variant	Exon 3 of 22	ENST00000529221.6	NP_060338.3	Q9H892-1A8K8G6Q53G14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TTC12	ENST00000529221.6 link	c.185A>G	p.Asn62Ser	missense_variant	Exon 3 of 22	2	NM_017868.4	ENSP00000433757.1		Q9H892-1

Frequencies

GnomAD3 genomes

AF:

0.000361

AC:

AN:

152170

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00101

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000851

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000121

AC:

AN:

248186

AF XY:

0.0000819

show subpopulations

Gnomad AFR exome

AF:

0.00124

Gnomad AMR exome

AF:

0.000298

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000343

AC:

AN:

1459048

Hom.:

Cov.:

AF XY:

0.0000344

AC XY:

AN XY:

725954

show subpopulations

African (AFR)

AF:

0.000961

AC:

AN:

33284

American (AMR)

AF:

0.000251

AC:

AN:

43848

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26012

East Asian (EAS)

AF:

0.00

AC:

AN:

39622

South Asian (SAS)

AF:

0.00

AC:

AN:

85704

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53372

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111218

Other (OTH)

AF:

0.0000830

AC:

AN:

60230

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.489

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000387

AC:

AN:

152288

Hom.:

Cov.:

AF XY:

0.000322

AC XY:

AN XY:

74478

show subpopulations

African (AFR)

AF:

0.00111

AC:

AN:

41552

American (AMR)

AF:

0.000850

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.530

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000134

Hom.:

Bravo

AF:

0.000427

ESP6500AA

AF:

0.00204

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000988

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Apr 08, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.185A>G (p.N62S) alteration is located in exon 3 (coding exon 2) of the TTC12 gene. This alteration results from a A to G substitution at nucleotide position 185, causing the asparagine (N) at amino acid position 62 to be replaced by a serine (S). 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

0.14

BayesDel_addAF

Benign

-0.38

BayesDel_noAF

Benign

-0.35

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.23

T;T;T;.;.;.;T;.;.;.

Eigen

Uncertain

0.38

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.94

D;D;D;D;D;D;D;D;D;D

M_CAP

Benign

0.011

MetaRNN

Benign

0.042

T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.78

MutationAssessor

Uncertain

2.7

M;.;.;.;.;.;.;.;M;.

PhyloP100

4.3

PrimateAI

Benign

0.48

PROVEAN

Uncertain

-2.8

D;D;D;D;D;D;D;D;D;D

REVEL

Benign

0.11

Sift

Uncertain

0.0090

D;D;D;D;D;D;D;D;D;D

Sift4G

Benign

0.15

T;D;D;D;D;T;T;D;T;T

Polyphen

0.79

P;.;.;.;.;.;.;.;.;.

Vest4

0.27

MVP

0.67

MPC

0.31

ClinPred

0.058

GERP RS

5.0

Varity_R

0.13

gMVP

0.33

Mutation Taster

=93/7

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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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NM_017868.4:c.185A>G

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