4-40097369-G-T

Position:

• chr4-40097369-G-T

Variant summary

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

The NM_018177.6(N4BP2):​c.29G>T​(p.Gly10Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,578 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: N4BP2 NM_018177.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.88

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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
N4BP2	NM_018177.6	c.29G>T	p.Gly10Val	missense_variant	3/18	ENST00000261435.11	NP_060647.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
N4BP2	ENST00000261435.11	c.29G>T	p.Gly10Val	missense_variant	3/18	5	NM_018177.6	ENSP00000261435	P1
N4BP2	ENST00000511480.5	c.29G>T	p.Gly10Val	missense_variant, NMD_transcript_variant	3/19	1		ENSP00000422436
N4BP2	ENST00000515550.1	c.-11-4706G>T		intron_variant		3		ENSP00000422057
N4BP2	ENST00000706658.1	c.29G>T	p.Gly10Val	missense_variant, NMD_transcript_variant	5/21			ENSP00000516486

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461578 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727032

Gnomad4 AFR exome AF: 0.00

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: 0.0000166

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 27, 2021

The c.29G>T (p.G10V) alteration is located in exon 3 (coding exon 1) of the N4BP2 gene. This alteration results from a G to T substitution at nucleotide position 29, causing the glycine (G) at amino acid position 10 to be replaced by a valine (V). 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	0.23
BayesDel_addAF	Uncertain	0.063	T
BayesDel_noAF	Benign	-0.15
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.017	T
Eigen	Uncertain	0.33
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.73	T
M_CAP	Benign	0.012	T
MetaRNN	Uncertain	0.61	D
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.6	L
MutationTaster	Benign	1.0	D
PrimateAI	Benign	0.42	T
PROVEAN	Uncertain	-3.0	D
REVEL	Benign	0.14
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.010	D
Polyphen		0.98	D
Vest4		0.84
MutPred		0.20		Loss of glycosylation at P12 (P = 0.0503);
MVP		0.52
MPC		0.49
ClinPred		0.98	D
GERP RS		5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.41
gMVP		0.31

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: chr4-40098989;