2-1492028-A-G

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001206744.2(TPO):c.1769-1774A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.514 in 152,166 control chromosomes in the GnomAD database, including 20,832 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 0.51 (20832 hom., cov: 33)
• Consequence: TPO NM_001206744.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.879

Genes affected

TPO (HGNC:12015): (thyroid peroxidase) This gene encodes a membrane-bound glycoprotein. The encoded protein acts as an enzyme and plays a central role in thyroid gland function. The protein functions in the iodination of tyrosine residues in thyroglobulin and phenoxy-ester formation between pairs of iodinated tyrosines to generate the thyroid hormones, thyroxine and triiodothyronine. Mutations in this gene are associated with several disorders of thyroid hormonogenesis, including congenital hypothyroidism, congenital goiter, and thyroid hormone organification defect IIA. Multiple transcript variants encoding distinct isoforms have been identified for this gene, but the full-length nature of some variants has not been determined. [provided by RefSeq, May 2011]

(HGNC:):

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.99).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.649 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TPO	NM_001206744.2	c.1769-1774A>G		intron_variant		ENST00000329066.9
LOC124905966	XR_007086185.1	n.167-5837T>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TPO	ENST00000329066.9	c.1769-1774A>G		intron_variant		1	NM_001206744.2	P1
	ENST00000650512.1	n.548-73567T>C		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes AF: 0.514 AC: 78112 AN: 152048 Hom.: 20787 Cov.: 33

Gnomad AFR AF: 0.655

Gnomad AMI AF: 0.438

Gnomad AMR AF: 0.505

Gnomad ASJ AF: 0.480

Gnomad EAS AF: 0.525

Gnomad SAS AF: 0.604

Gnomad FIN AF: 0.449

Gnomad MID AF: 0.487

Gnomad NFE AF: 0.435

Gnomad OTH AF: 0.519

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

GnomAD4 genome AF: 0.514 AC: 78214 AN: 152166 Hom.: 20832 Cov.: 33 AF XY: 0.515 AC XY: 38329 AN XY: 74390

Gnomad4 AFR AF: 0.656

Gnomad4 AMR AF: 0.504

Gnomad4 ASJ AF: 0.480

Gnomad4 EAS AF: 0.525

Gnomad4 SAS AF: 0.603

Gnomad4 FIN AF: 0.449

Gnomad4 NFE AF: 0.435

Gnomad4 OTH AF: 0.522

Alfa AF: 0.448 Hom.: 20378

Bravo AF: 0.519

Asia WGS AF: 0.596 AC: 2070 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.99
Cadd	Benign	1.2
Dann	Benign	0.36

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: rs2048722; hg19: chr2-1495800;