chr4-40097498-G-A

Position:

• chr4-40097498-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_018177.6(N4BP2):​c.158G>A​(p.Ser53Asn) variant causes a missense 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. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: N4BP2 NM_018177.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.504

Genes affected

N4BP2 (HGNC:29851): (NEDD4 binding protein 2) This gene encodes a protein containing a polynucleotide kinase domain (PNK) near the N-terminal region, and a Small MutS Related (Smr) domain near the C-terminal region. The encoded protein can bind to both B-cell leukemia/lymphoma 3 (BCL-3) and neural precursor cell expressed, developmentally downregulated 4, (Nedd4) proteins. This protein binds and hydrolyzes ATP, may function as a 5'-polynucleotide kinase, and has the capacity to be a ubiquitylation substrate. This protein may play a role in transcription-coupled DNA repair or genetic recombination. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jan 2016]

ACMG classification

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=0.102336586).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
N4BP2	NM_018177.6	c.158G>A	p.Ser53Asn	missense_variant	3/18	ENST00000261435.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
N4BP2	ENST00000261435.11	c.158G>A	p.Ser53Asn	missense_variant	3/18	5	NM_018177.6	P1
N4BP2	ENST00000511480.5	c.158G>A	p.Ser53Asn	missense_variant, NMD_transcript_variant	3/19	1
N4BP2	ENST00000515550.1	c.-11-4577G>A		intron_variant		3
N4BP2	ENST00000706658.1	c.158G>A	p.Ser53Asn	missense_variant, NMD_transcript_variant	5/21

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 14, 2023

The c.158G>A (p.S53N) alteration is located in exon 3 (coding exon 1) of the N4BP2 gene. This alteration results from a G to A substitution at nucleotide position 158, causing the serine (S) at amino acid position 53 to be replaced by an asparagine (N). 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
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.53
CADD	Benign	16
DANN	Benign	0.96
DEOGEN2	Benign	0.0011	T
Eigen	Benign	-0.35
Eigen_PC	Benign	-0.18
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Benign	0.60	T
M_CAP	Benign	0.010	T
MetaRNN	Benign	0.10	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.95	L
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-0.94	N
REVEL	Benign	0.035
Sift	Uncertain	0.0010	D
Sift4G	Benign	0.15	T
Polyphen		0.11	B
Vest4		0.14
MutPred		0.25		Gain of glycosylation at S53 (P = 0.0266);
MVP		0.33
MPC		0.074
ClinPred		0.26	T
GERP RS		3.5
Varity_R		0.20
gMVP		0.57

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr4-40099118; COSMIC: COSV54707233;