17-74255101-G-C

Position:

• chr17-74255101-G-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_032646.6(TTYH2):​c.1524+1268G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 33)
• Consequence: TTYH2 NM_032646.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.314

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]

ACMG classification

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 (BayesDel_noAF=-0.92).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TTYH2	NM_032646.6	c.1524+1268G>C		intron_variant		ENST00000269346.9	NP_116035.5
TTYH2	NM_001330453.2	c.1461+1268G>C		intron_variant			NP_001317382.1
TTYH2	NM_052869.1	c.561+1268G>C		intron_variant			NP_443101.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TTYH2	ENST00000269346.9	c.1524+1268G>C		intron_variant		1	NM_032646.6	ENSP00000269346.4
TTYH2	ENST00000441391.6	c.561+1268G>C		intron_variant		1		ENSP00000394576.2
TTYH2	ENST00000529107.5	c.1461+1268G>C		intron_variant		2		ENSP00000433089.1
TTYH2	ENST00000526858.1	n.*305+1268G>C		intron_variant		5		ENSP00000462492.1

Frequencies

GnomAD3 genomes Cov.: 33

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	2.3
DANN	Benign	0.55

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

Other links and lift over

dbSNP: rs8078051; hg19: chr17-72251240;