Genetic Variant TENT4B:p.Ala81Gly (chr16-50153863-C-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001365324.3(TENT4B):c.242C>G(p.Ala81Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000211 in 1,424,508 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/18 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 7.9e-7 ( 0 hom. )

Consequence

TENT4B
NM_001365324.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.48

Variant links:

Genes affected

TENT4B (HGNC:30758): (terminal nucleotidyltransferase 4B) Enables guanylyltransferase activity and polynucleotide adenylyltransferase activity. Involved in several processes, including RNA metabolic process; negative regulation of telomere maintenance via telomerase; and regulation of mRNA stability. Located in cytoplasm and nucleolus. Part of TRAMP complex. [provided by Alliance of Genome Resources, Apr 2022]

TENT4B links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.18668595).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TENT4B	NM_001365324.3 link	c.242C>G	p.Ala81Gly	missense_variant	Exon 1 of 12	ENST00000561678.7	NP_001352253.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TENT4B	ENST00000561678.7 link	c.242C>G	p.Ala81Gly	missense_variant	Exon 1 of 12	5	NM_001365324.3	ENSP00000455837.3		A0A7N4YH79
TENT4B	ENST00000436909.8 link	c.197C>G	p.Ala66Gly	missense_variant	Exon 2 of 13	2		ENSP00000396995.3		Q8NDF8-5

Frequencies

GnomAD3 genomes

AF:

0.0000133

AC:

AN:

150708

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000484

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

7.85e-7

AC:

AN:

1273800

Hom.:

Cov.:

AF XY:

0.00000160

AC XY:

AN XY:

626508

show subpopulations

Gnomad4 AFR exome

AF:

0.0000392

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

AF:

0.0000133

AC:

AN:

150708

Hom.:

Cov.:

AF XY:

0.0000272

AC XY:

AN XY:

73554

show subpopulations

Gnomad4 AFR

AF:

0.0000484

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 21, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.197C>G (p.A66G) alteration is located in exon 2 (coding exon 2) of the PAPD5 gene. This alteration results from a C to G substitution at nucleotide position 197, causing the alanine (A) at amino acid position 66 to be replaced by a glycine (G). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.62

CADD

Benign

DANN

Benign

0.97

Eigen

Benign

-0.39

Eigen_PC

Benign

-0.40

FATHMM_MKL

Benign

0.61

LIST_S2

Benign

0.41

M_CAP

Pathogenic

0.39

MetaRNN

Benign

0.19

MetaSVM

Benign

-1.1

PrimateAI

Pathogenic

0.87

PROVEAN

Benign

-0.37

REVEL

Benign

0.15

Sift

Pathogenic

0.0

Sift4G

Benign

0.45

Vest4

0.090

MutPred

0.089

Gain of relative solvent accessibility (P = 0.0082);

MVP

0.33

MPC

1.2

ClinPred

0.82

GERP RS

0.46

gMVP

0.084

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over