Variant 17-74237477-A-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_032646.6(TTYH2):c.598A>C(p.Lys200Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,546 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

TTYH2
NM_032646.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.687

Variant links:

Genes affected

TTYH2 (HGNC:13877): (tweety family member 2) This gene encodes a member of the tweety family of proteins. Members of this family function as chloride anion channels. The encoded protein functions as a calcium(2+)-activated large conductance chloride(-) channel, and may play a role in kidney tumorigenesis. Two transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2008]

TTYH2 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.043879032).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TTYH2	NM_032646.6 linkuse as main transcript	c.598A>C	p.Lys200Gln	missense_variant	4/14	ENST00000269346.9
TTYH2	NM_001330453.2 linkuse as main transcript	c.535A>C	p.Lys179Gln	missense_variant	4/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TTYH2	ENST00000269346.9 linkuse as main transcript	c.598A>C	p.Lys200Gln	missense_variant	4/14	1	NM_032646.6	P1	Q9BSA4-1
TTYH2	ENST00000529107.5 linkuse as main transcript	c.535A>C	p.Lys179Gln	missense_variant	4/14	2
TTYH2	ENST00000578825.5 linkuse as main transcript	n.310A>C		non_coding_transcript_exon_variant	3/5	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250644

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135480

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000884

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461546

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727036

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 12, 2023

The c.598A>C (p.K200Q) alteration is located in exon 4 (coding exon 4) of the TTYH2 gene. This alteration results from a A to C substitution at nucleotide position 598, causing the lysine (K) at amino acid position 200 to be replaced by a glutamine (Q). 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

0.071

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.76

Cadd

Benign

1.9

Dann

Benign

0.32

DEOGEN2

Benign

0.023

T;T

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.15

LIST_S2

Benign

0.41

T;T

M_CAP

Benign

0.011

MetaRNN

Benign

0.044

T;T

MetaSVM

Benign

-0.91

MutationAssessor

Benign

-1.1

N;.

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.23

PROVEAN

Benign

0.55

N;N

REVEL

Benign

0.019

Sift

Benign

0.66

T;T

Sift4G

Benign

0.68

T;T

Polyphen

0.0

B;B

Vest4

0.14

MutPred

0.49

Loss of ubiquitination at K200 (P = 0.0118);.;

MVP

0.040

MPC

0.13

ClinPred

0.0083

GERP RS

-1.7

Varity_R

0.050

gMVP

0.067

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over