Variant 4-9450379-T-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001040448.3(DEFB131A):c.78T>A(p.Asn26Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000159 in 1,572,890 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000049 ( 0 hom. )

Consequence

DEFB131A
NM_001040448.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.55

Variant links:

Genes affected

DEFB131A (HGNC:18108): (defensin beta 131A) Defensins are cysteine-rich cationic polypeptides that are important in the immunologic response to invading microorganisms. The antimicrobial protein encoded by this gene is secreted and is a member of the beta defensin protein family. Beta defensin genes are found in several clusters throughout the genome, with this gene mapping to a cluster at 4p16. [provided by RefSeq, Nov 2014]

DEFB131A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.043869227).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DEFB131A	NM_001040448.3 linkuse as main transcript	c.78T>A	p.Asn26Lys	missense_variant	2/2	ENST00000334879.2	NP_001035538.2	P59861

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DEFB131A	ENST00000334879.2 linkuse as main transcript	c.78T>A	p.Asn26Lys	missense_variant	2/2	1	NM_001040448.3	ENSP00000335538.1		P59861

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152244

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000386

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:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000133

AC:

AN:

224976

Hom.:

AF XY:

0.00000818

AC XY:

AN XY:

122254

show subpopulations

Gnomad AFR exome

AF:

0.000202

Gnomad AMR exome

AF:

0.00

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000493

AC:

AN:

1420646

Hom.:

Cov.:

AF XY:

0.00000285

AC XY:

AN XY:

702886

show subpopulations

Gnomad4 AFR exome

AF:

0.000184

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:

0.0000171

GnomAD4 genome

AF:

0.000118

AC:

AN:

152244

Hom.:

Cov.:

AF XY:

0.0000941

AC XY:

AN XY:

74376

show subpopulations

Gnomad4 AFR

AF:

0.000386

Gnomad4 AMR

AF:

0.0000654

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:

0.000478

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.000125

ESP6500AA

AF:

0.000276

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000166

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 23, 2024

The c.78T>A (p.N26K) alteration is located in exon 2 (coding exon 2) of the DEFB131 gene. This alteration results from a T to A substitution at nucleotide position 78, causing the asparagine (N) at amino acid position 26 to be replaced by a lysine (K). 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

-0.55

BayesDel_noAF

Benign

-0.75

CADD

Benign

0.0080

DANN

Benign

0.13

DEOGEN2

Benign

0.0039

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.00089

LIST_S2

Benign

0.27

M_CAP

Benign

0.00054

MetaRNN

Benign

0.044

MetaSVM

Benign

-1.0

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-0.29

REVEL

Benign

0.0050

Sift

Benign

0.68

Sift4G

Benign

1.0

Polyphen

0.0

Vest4

0.17

MutPred

0.25

Gain of methylation at N26 (P = 0.0053);

MVP

0.014

MPC

0.00036

ClinPred

0.016

GERP RS

-0.84

Varity_R

0.032

gMVP

0.029

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.12

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