1-235367487-T-C

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_003193.5(TBCE):c.-49T>C variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0333 in 153,100 control chromosomes in the GnomAD database, including 189 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.033 (189 hom., cov: 32)
  • Exomes 𝑓: 0.0099 (0 hom.)
• Consequence: TBCE NM_003193.5 5_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.548

Genes affected

TBCE (HGNC:11582): (tubulin folding cofactor E) Cofactor E is one of four proteins (cofactors A, D, E, and C) involved in the pathway leading to correctly folded beta-tubulin from folding intermediates. Cofactors A and D are believed to play a role in capturing and stabilizing beta-tubulin intermediates in a quasi-native confirmation. Cofactor E binds to the cofactor D/beta-tubulin complex; interaction with cofactor C then causes the release of beta-tubulin polypeptides that are committed to the native state. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 1-235367487-T-C is Benign according to our data. Variant chr1-235367487-T-C is described in ClinVar as [Benign]. Clinvar id is 296288.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0916 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TBCE	NM_003193.5	c.-49T>C		5_prime_UTR_variant	1/17	ENST00000642610.2
TBCE	NM_001079515.3	c.-97T>C		5_prime_UTR_variant	1/17
TBCE	NM_001287801.2	c.-49T>C		5_prime_UTR_variant	1/18
TBCE	NM_001287802.2	c.-359T>C		5_prime_UTR_variant	1/16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TBCE	ENST00000642610.2	c.-49T>C		5_prime_UTR_variant	1/17		NM_003193.5	P1

Frequencies

GnomAD3 genomes AF: 0.0334 AC: 5075 AN: 152172 Hom.: 188 Cov.: 32

Gnomad AFR AF: 0.0941

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0223

Gnomad ASJ AF: 0.00346

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00331

Gnomad FIN AF: 0.00687

Gnomad MID AF: 0.0348

Gnomad NFE AF: 0.00963

Gnomad OTH AF: 0.0315

GnomAD4 exome AF: 0.00988 AC: 8 AN: 810 Hom.: 0 Cov.: 0 AF XY: 0.00923 AC XY: 5 AN XY: 542

Gnomad4 AFR exome AF: 0.143

Gnomad4 AMR exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00694

Gnomad4 NFE exome AF: 0.00949

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0334 AC: 5083 AN: 152290 Hom.: 189 Cov.: 32 AF XY: 0.0319 AC XY: 2376 AN XY: 74466

Gnomad4 AFR AF: 0.0940

Gnomad4 AMR AF: 0.0222

Gnomad4 ASJ AF: 0.00346

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00331

Gnomad4 FIN AF: 0.00687

Gnomad4 NFE AF: 0.00963

Gnomad4 OTH AF: 0.0312

Alfa AF: 0.0191 Hom.: 17

Bravo AF: 0.0379

Asia WGS AF: 0.00895 AC: 31 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hypoparathyroidism-retardation-dysmorphism syndrome Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Aug 10, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
Cadd	Benign	3.6
Dann	Benign	0.55
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.1

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: rs55980101; hg19: chr1-235530802;