18-75211879-G-A

Variant names:

• chr18-75211879-G-A
• NM_001308210.2:c.3G>A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PVS1_Supporting PM2

The NM_001308210.2(TSHZ1):​c.3G>A​(p.Met1?) variant causes a start lost change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TSHZ1 NM_001308210.2 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.24

Genes affected

TSHZ1 (HGNC:10669): (teashirt zinc finger homeobox 1) This gene encodes a colon cancer antigen that was defined by serological analysis of recombinant cDNA expression libraries. The encoded protein is a member of the teashirt C2H2-type zinc-finger protein family and may be involved in transcriptional regulation of developmental processes. Mutations in this gene may be associated with congenital aural atresia syndrome. [provided by RefSeq, Jan 2012]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PVS1: Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 46 codons. Genomic position: 75285543. Lost 0.042 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TSHZ1	NM_001308210.2	c.3G>A	p.Met1?	start_lost	Exon 1 of 2	ENST00000580243.3	NP_001295139.1
TSHZ1	NM_005786.6	c.-96+636G>A		intron_variant	Intron 1 of 1		NP_005777.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TSHZ1	ENST00000580243.3	c.3G>A	p.Met1?	start_lost	Exon 1 of 2	2	NM_001308210.2	ENSP00000464391.1
TSHZ1	ENST00000322038.5	c.-96+636G>A		intron_variant	Intron 1 of 1	1		ENSP00000323584.5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1040860 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 491016

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Aural atresia, congenital Uncertain:1

Feb 13, 2019

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The TSHZ1 c.3G>A p.(Met1?) variant alters the initiator methionine amino acid and the resultant protein is described as p.Met1? to denote that whether the loss of the methionine at codon 1 prevents all protein translation or causes abnormal protein formation from an alternate methionine is unknown. To our knowledge, this variant has not been reported in the peer-reviewed literature. The highest frequency of this allele in the Genome Aggregation Database is 0.00027 in the Admixed American population (version 2.1.1). Based on the limited evidence, the TSHZ1 c.3G>A p.(Met1?) variant is classified as a variant of uncertain significance for congenital aural atresia. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Benign	-0.27
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Benign	0.10	T
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Uncertain	0.90	D
M_CAP	Benign	0.012	T
MetaRNN	Uncertain	0.63	D
Sift4G	Benign	0.27	T
Vest4		0.59
MVP		0.77
GERP RS		1.2
Varity_R		0.26
gMVP		0.28

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr18-72923834;