rs142662151

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_001082486.2(ACD):c.109G>A(p.Asp37Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000521 in 1,606,830 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 11/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00029 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00055 ( 1 hom. )

Consequence

ACD
NM_001082486.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 3.34

Variant links:

Genes affected

ACD (HGNC:25070): (ACD shelterin complex subunit and telomerase recruitment factor) This gene encodes a protein that is involved in telomere function. This protein is one of six core proteins in the telosome/shelterin telomeric complex, which functions to maintain telomere length and to protect telomere ends. Through its interaction with other components, this protein plays a key role in the assembly and stabilization of this complex, and it mediates the access of telomerase to the telomere. Multiple transcript variants encoding different isoforms have been found for this gene. This gene, which is also referred to as TPP1, is distinct from the unrelated TPP1 gene on chromosome 11, which encodes tripeptidyl-peptidase I. [provided by RefSeq, Jul 2008]

ACD links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.09627858).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
ACD	NM_001082486.2 linkuse as main transcript	c.109G>A	p.Asp37Asn	missense_variant	2/12	ENST00000620761.6
ACD	NM_001410884.1 linkuse as main transcript	c.109G>A	p.Asp37Asn	missense_variant	2/11
ACD	NM_022914.3 linkuse as main transcript	c.100G>A	p.Asp34Asn	missense_variant, splice_region_variant	2/12
ACD	XR_429728.4 linkuse as main transcript	n.149G>A		non_coding_transcript_exon_variant	2/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACD	ENST00000620761.6 linkuse as main transcript	c.109G>A	p.Asp37Asn	missense_variant	2/12	1	NM_001082486.2	P1	Q96AP0-3

Frequencies

GnomAD3 genomes

AF:

0.000289

AC:

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000188

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000500

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000343

AC:

AN:

233030

Hom.:

AF XY:

0.000358

AC XY:

AN XY:

128634

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000503

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000505

Gnomad NFE exome

AF:

0.000546

Gnomad OTH exome

AF:

0.00105

GnomAD4 exome

AF:

0.000545

AC:

793

AN:

1454612

Hom.:

Cov.:

AF XY:

0.000549

AC XY:

397

AN XY:

723122

show subpopulations

Gnomad4 AFR exome

AF:

0.0000600

Gnomad4 AMR exome

AF:

0.000429

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.000218

Gnomad4 NFE exome

AF:

0.000661

Gnomad4 OTH exome

AF:

0.000449

GnomAD4 genome

AF:

0.000289

AC:

AN:

152218

Hom.:

Cov.:

AF XY:

0.000242

AC XY:

AN XY:

74346

show subpopulations

Gnomad4 AFR

AF:

0.000121

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000188

Gnomad4 NFE

AF:

0.000500

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000492

Hom.:

Bravo

AF:

0.000276

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00104

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000701

AC:

ExAC

AF:

0.000365

AC:

EpiCase

AF:

0.000491

EpiControl

AF:

0.000356

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Mar 19, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Feb 06, 2024	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 02, 2021

The p.D123N variant (also known as c.367G>A), located in coding exon 2 of the ACD gene, results from a G to A substitution at nucleotide position 367. The aspartic acid at codon 123 is replaced by asparagine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Dyskeratosis congenita, autosomal dominant 6

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jan 22, 2024

This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 123 of the ACD protein (p.Asp123Asn). This variant is present in population databases (rs142662151, gnomAD 0.06%). This variant has not been reported in the literature in individuals affected with ACD-related conditions. ClinVar contains an entry for this variant (Variation ID: 475769). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt ACD protein function with a positive predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Benign

-0.56

BayesDel_noAF

Benign

-0.65

Cadd

Uncertain

Dann

Uncertain

0.99

Eigen

Benign

-0.087

Eigen_PC

Benign

-0.062

FATHMM_MKL

Uncertain

0.88

LIST_S2

Benign

0.37

T;T;.;T;T;.

M_CAP

Benign

0.059

MetaRNN

Benign

0.084

T;T;T;T;T;T

MetaSVM

Benign

-1.1

MutationTaster

Benign

1.0

N;N

PrimateAI

Uncertain

0.49

REVEL

Benign

0.081

Polyphen

0.86, 0.67

.;P;.;.;.;P

Vest4

0.20, 0.22, 0.36

MVP

0.54

MPC

0.31

ClinPred

0.12

GERP RS

4.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Varity_R

0.28

gMVP

0.32

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

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