20-50891478-T-C

Position:

• chr20-50891478-T-C

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_Strong BP6 BS1 BS2

The NM_001282531.3(ADNP):​c.3236A>G​(p.Asn1079Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000439 in 1,612,714 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00023 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00046 (0 hom.)
• Consequence: ADNP NM_001282531.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:3
• Conservation: PhyloP100: -0.430

Genes affected

ADNP (HGNC:15766): (activity dependent neuroprotector homeobox) Vasoactive intestinal peptide is a neuroprotective factor that has a stimulatory effect on the growth of some tumor cells and an inhibitory effect on others. This gene encodes a protein that is upregulated by vasoactive intestinal peptide and may be involved in its stimulatory effect on certain tumor cells. The encoded protein contains one homeobox and nine zinc finger domains, suggesting that it functions as a transcription factor. This gene is also upregulated in normal proliferative tissues. Finally, the encoded protein may increase the viability of certain cell types through modulation of p53 activity. Alternatively spliced transcript variants encoding the same protein have been described. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -13 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.01762247).
• BP6: Variant 20-50891478-T-C is Benign according to our data. Variant chr20-50891478-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 1237918.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2, Benign=2}.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00023 (35/152362) while in subpopulation NFE AF= 0.000412 (28/68032). AF 95% confidence interval is 0.000292. There are 0 homozygotes in gnomad4. There are 15 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 35 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ADNP	NM_001282531.3	c.3236A>G	p.Asn1079Ser	missense_variant	6/6	ENST00000621696.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ADNP	ENST00000621696.5	c.3236A>G	p.Asn1079Ser	missense_variant	6/6	5	NM_001282531.3	P1

Frequencies

GnomAD3 genomes AF: 0.000230 AC: 35 AN: 152244 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.000121

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

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: 0.000412

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000224 AC: 56 AN: 250092 Hom.: 0 AF XY: 0.000222 AC XY: 30 AN XY: 135250

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000467

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000461 AC: 673 AN: 1460352 Hom.: 0 Cov.: 35 AF XY: 0.000472 AC XY: 343 AN XY: 726582

Gnomad4 AFR exome AF: 0.0000597

Gnomad4 AMR exome AF: 0.0000447

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000595

Gnomad4 OTH exome AF: 0.0000994

GnomAD4 genome AF: 0.000230 AC: 35 AN: 152362 Hom.: 0 Cov.: 33 AF XY: 0.000201 AC XY: 15 AN XY: 74514

Gnomad4 AFR AF: 0.000120

Gnomad4 AMR AF: 0.0000653

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000412

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000406 Hom.: 0

Bravo AF: 0.000242

TwinsUK AF: 0.000270 AC: 1

ALSPAC AF: 0.000259 AC: 1

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000349 AC: 3

ExAC AF: 0.000189 AC: 23

Asia WGS AF: 0.000289 AC: 2 AN: 3478

EpiCase AF: 0.000327

EpiControl AF: 0.000415

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:3

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:1 Benign:3

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jun 01, 2022	ADNP: BP4 -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Apr 01, 2020	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jul 07, 2023	This variant is present in population databases (rs147399432, gnomAD 0.05%), and has an allele count higher than expected for a pathogenic variant. This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 1079 of the ADNP protein (p.Asn1079Ser). This variant has not been reported in the literature in individuals affected with ADNP-related conditions. 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. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The serine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. ClinVar contains an entry for this variant (Variation ID: 1237918). -

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 13, 2017

The p.N1079S variant (also known as c.3236A>G), located in coding exon 3 of the ADNP gene, results from an A to G substitution at nucleotide position 3236. The asparagine at codon 1079 is replaced by serine, an amino acid with highly similar properties. This amino acid position is not well conserved in available vertebrate species. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.053
BayesDel_addAF	Benign	-0.56	T
BayesDel_noAF	Benign	-0.71
CADD	Benign	0.41
DANN	Benign	0.32
DEOGEN2	Benign	0.077	T;T;T;T;T;.
Eigen	Benign	-1.0
Eigen_PC	Benign	-0.94
FATHMM_MKL	Benign	0.38	N
LIST_S2	Benign	0.72	.;T;.;.;.;T
M_CAP	Benign	0.0024	T
MetaRNN	Benign	0.018	T;T;T;T;T;T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	0.0	N;N;N;N;N;.
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-0.050	N;.;N;N;N;.
REVEL	Benign	0.21
Sift	Benign	1.0	T;.;T;T;T;.
Sift4G	Benign	0.59	T;T;T;T;T;.
Polyphen		0.0	B;B;B;B;B;.
Vest4		0.050
MVP		0.22
ClinPred		0.0082	T
GERP RS		-4.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.028
gMVP		0.022

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: rs147399432; hg19: chr20-49508015; COSMIC: COSV62425491; COSMIC: COSV62425491;