chr8-132867063-C-A

Variant names:

• chr8-132867063-C-A
• NM_003235.5:c.63C>A

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Moderate BP6_Moderate BP7

The NM_003235.5(TG):​c.63C>A​(p.Ile21Ile) variant causes a synonymous 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. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TG NM_003235.5 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.50
• Publications: 0 publications found

Genes affected

TG (HGNC:11764): (thyroglobulin) Thyroglobulin (Tg) is a glycoprotein homodimer produced predominantly by the thryroid gland. It acts as a substrate for the synthesis of thyroxine and triiodothyronine as well as the storage of the inactive forms of thyroid hormone and iodine. Thyroglobulin is secreted from the endoplasmic reticulum to its site of iodination, and subsequent thyroxine biosynthesis, in the follicular lumen. Mutations in this gene cause thyroid dyshormonogenesis, manifested as goiter, and are associated with moderate to severe congenital hypothyroidism. Polymorphisms in this gene are associated with susceptibility to autoimmune thyroid diseases (AITD) such as Graves disease and Hashimoto thryoiditis. [provided by RefSeq, Nov 2009]

TG Gene-Disease associations (from GenCC):

• thyroid dyshormonogenesis 3

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• familial thyroid dyshormonogenesis

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• thyroid cancer

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.42).
• BP6: Variant 8-132867063-C-A is Benign according to our data. Variant chr8-132867063-C-A is described in ClinVar as [Likely_benign]. Clinvar id is 3638360.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=1.5 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TG	NM_003235.5	c.63C>A	p.Ile21Ile	synonymous_variant	Exon 1 of 48	ENST00000220616.9	NP_003226.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TG	ENST00000220616.9	c.63C>A	p.Ile21Ile	synonymous_variant	Exon 1 of 48	1	NM_003235.5	ENSP00000220616.4
TG	ENST00000523901.1	n.63C>A		non_coding_transcript_exon_variant	Exon 1 of 6	5		ENSP00000427871.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1445740 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 717498

African (AFR) AF: 0.00 AC: 0 AN: 33202

American (AMR) AF: 0.00 AC: 0 AN: 43286

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25792

East Asian (EAS) AF: 0.00 AC: 0 AN: 39208

South Asian (SAS) AF: 0.00 AC: 0 AN: 83588

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52322

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5740

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1102876

Other (OTH) AF: 0.00 AC: 0 AN: 59726

GnomAD4 genome Cov.: 31

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Feb 02, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.42
CADD	Benign	7.5
DANN	Benign	0.66
PhyloP100		1.5
PromoterAI		-0.062	Neutral

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

hg19: chr8-133879308;