chr17-74239326-G-A

Variant names:

• chr17-74239326-G-A
• rs12150474
• NM_032646.6:c.635+1812G>A

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_032646.6(TTYH2):​c.635+1812G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0892 in 152,272 control chromosomes in the GnomAD database, including 795 homozygotes. 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: 𝑓 0.089 (795 hom., cov: 32)
• Consequence: TTYH2 NM_032646.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.911
• Publications: 2 publications found

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

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.12 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_032646.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TTYH2	NM_032646.6	MANE Select	c.635+1812G>A		intron	N/A	NP_116035.5
	TTYH2	NM_001330453.2		c.572+1812G>A		intron	N/A	NP_001317382.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TTYH2	ENST00000269346.9	TSL:1 MANE Select	c.635+1812G>A		intron	N/A	ENSP00000269346.4
	TTYH2	ENST00000529107.5	TSL:2	c.572+1812G>A		intron	N/A	ENSP00000433089.1
	TTYH2	ENST00000578825.5	TSL:5	n.347+1812G>A		intron	N/A

Frequencies

GnomAD3 genomes AF: 0.0892 AC: 13578 AN: 152154 Hom.: 794 Cov.: 32

Gnomad AFR AF: 0.0250

Gnomad AMI AF: 0.101

Gnomad AMR AF: 0.0917

Gnomad ASJ AF: 0.152

Gnomad EAS AF: 0.000770

Gnomad SAS AF: 0.0510

Gnomad FIN AF: 0.154

Gnomad MID AF: 0.209

Gnomad NFE AF: 0.122

Gnomad OTH AF: 0.117

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

GnomAD4 genome AF: 0.0892 AC: 13577 AN: 152272 Hom.: 795 Cov.: 32 AF XY: 0.0888 AC XY: 6613 AN XY: 74460

African (AFR) AF: 0.0249 AC: 1037 AN: 41570

American (AMR) AF: 0.0917 AC: 1403 AN: 15302

Ashkenazi Jewish (ASJ) AF: 0.152 AC: 529 AN: 3470

East Asian (EAS) AF: 0.000772 AC: 4 AN: 5184

South Asian (SAS) AF: 0.0506 AC: 244 AN: 4822

European-Finnish (FIN) AF: 0.154 AC: 1635 AN: 10616

Middle Eastern (MID) AF: 0.214 AC: 63 AN: 294

European-Non Finnish (NFE) AF: 0.122 AC: 8324 AN: 67990

Other (OTH) AF: 0.116 AC: 246 AN: 2114

Alfa AF: 0.100 Hom.: 145

Bravo AF: 0.0821

Asia WGS AF: 0.0280 AC: 97 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	3.9
DANN	Benign	0.61
PhyloP100		0.91
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs12150474; hg19: chr17-72235465;