Variant chr8-6870817-A-C 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_005218.4(DEFB1):c.71T>G(p.Phe24Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000166 in 1,613,060 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00045 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00014 ( 1 hom. )

Consequence

DEFB1
NM_005218.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.336

Variant links:

Genes affected

DEFB1 (HGNC:2766): (defensin beta 1) Defensins form a family of microbicidal and cytotoxic peptides made by neutrophils. Members of the defensin family are highly similar in protein sequence. This gene encodes defensin, beta 1, an antimicrobial peptide implicated in the resistance of epithelial surfaces to microbial colonization. This gene maps in close proximity to defensin family member, defensin, alpha 1 and has been implicated in the pathogenesis of cystic fibrosis. [provided by RefSeq, Jul 2008]

DEFB1 links:

GS1-24F4.2 (HGNC:):

GS1-24F4.2 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=0.026589066).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DEFB1	NM_005218.4 linkuse as main transcript	c.71T>G	p.Phe24Cys	missense_variant	2/2	ENST00000297439.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
DEFB1	ENST00000297439.4 linkuse as main transcript	c.71T>G	p.Phe24Cys	missense_variant	2/2	1	NM_005218.4	P1
GS1-24F4.2	ENST00000531701.1 linkuse as main transcript	n.226-14305A>C		intron_variant, non_coding_transcript_variant		3
GS1-24F4.2	ENST00000655804.1 linkuse as main transcript	n.323-2364A>C		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.000453

AC:

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00137

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000392

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:

0.0000735

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000328

AC:

AN:

249830

Hom.:

AF XY:

0.000237

AC XY:

AN XY:

134942

show subpopulations

Gnomad AFR exome

AF:

0.00129

Gnomad AMR exome

AF:

0.00134

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:

0.0000884

Gnomad OTH exome

AF:

0.000819

GnomAD4 exome

AF:

0.000137

AC:

200

AN:

1460710

Hom.:

Cov.:

AF XY:

0.000132

AC XY:

AN XY:

726560

show subpopulations

Gnomad4 AFR exome

AF:

0.000958

Gnomad4 AMR exome

AF:

0.00119

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:

0.0000891

Gnomad4 OTH exome

AF:

0.000232

GnomAD4 genome

AF:

0.000446

AC:

AN:

152350

Hom.:

Cov.:

AF XY:

0.000456

AC XY:

AN XY:

74510

show subpopulations

Gnomad4 AFR

AF:

0.00135

Gnomad4 AMR

AF:

0.000392

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000342

Hom.:

Bravo

AF:

0.000533

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.000681

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000305

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.000237

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

Apr 12, 2022

The c.71T>G (p.F24C) alteration is located in exon 2 (coding exon 2) of the DEFB1 gene. This alteration results from a T to G substitution at nucleotide position 71, causing the phenylalanine (F) at amino acid position 24 to be replaced by a cysteine (C). 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

0.21

BayesDel_addAF

Benign

-0.50

BayesDel_noAF

Benign

-0.52

CADD

Benign

DANN

Benign

0.94

DEOGEN2

Benign

0.37

Eigen

Benign

-0.98

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.0071

M_CAP

Benign

0.00093

MetaRNN

Benign

0.027

MetaSVM

Benign

-1.1

MutationTaster

Benign

1.0

PrimateAI

Benign

0.37

PROVEAN

Benign

-1.2

REVEL

Benign

0.14

Sift

Benign

0.16

Sift4G

Benign

0.10

Polyphen

0.80

Vest4

0.27

MVP

0.040

MPC

0.00027

ClinPred

0.015

GERP RS

-3.1

Varity_R

0.050

gMVP

0.17

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

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