1-10463134-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_004401.3(DFFA):c.707C>T(p.Ala236Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000778 in 1,613,990 control chromosomes in the GnomAD database, including 2 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 0.00032 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00083 ( 2 hom. )

Consequence

DFFA
NM_004401.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.15

Variant links:

Genes affected

DFFA (HGNC:2772): (DNA fragmentation factor subunit alpha) Apoptosis is a cell death process that removes toxic and/or useless cells during mammalian development. The apoptotic process is accompanied by shrinkage and fragmentation of the cells and nuclei and degradation of the chromosomal DNA into nucleosomal units. DNA fragmentation factor (DFF) is a heterodimeric protein of 40-kD (DFFB) and 45-kD (DFFA) subunits. DFFA is the substrate for caspase-3 and triggers DNA fragmentation during apoptosis. DFF becomes activated when DFFA is cleaved by caspase-3. The cleaved fragments of DFFA dissociate from DFFB, the active component of DFF. DFFB has been found to trigger both DNA fragmentation and chromatin condensation during apoptosis. Two alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

DFFA links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.14171171).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DFFA	NM_004401.3 linkuse as main transcript	c.707C>T	p.Ala236Val	missense_variant	5/6	ENST00000377038.8
DFFA	NM_213566.2 linkuse as main transcript	c.707C>T	p.Ala236Val	missense_variant	5/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DFFA	ENST00000377038.8 linkuse as main transcript	c.707C>T	p.Ala236Val	missense_variant	5/6	1	NM_004401.3	P1	O00273-1
DFFA	ENST00000377036.2 linkuse as main transcript	c.707C>T	p.Ala236Val	missense_variant	5/5	1			O00273-2
DFFA	ENST00000476658.5 linkuse as main transcript	c.*37C>T		3_prime_UTR_variant, NMD_transcript_variant	4/5	3

Frequencies

GnomAD3 genomes

AF:

0.000316

AC:

AN:

152122

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000189

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000544

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000346

AC:

AN:

251348

Hom.:

AF XY:

0.000331

AC XY:

AN XY:

135840

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.0000868

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.000660

Gnomad OTH exome

AF:

0.000815

GnomAD4 exome

AF:

0.000826

AC:

1208

AN:

1461868

Hom.:

Cov.:

AF XY:

0.000809

AC XY:

588

AN XY:

727226

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.0000894

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.000150

Gnomad4 NFE exome

AF:

0.00104

Gnomad4 OTH exome

AF:

0.000480

GnomAD4 genome

AF:

0.000316

AC:

AN:

152122

Hom.:

Cov.:

AF XY:

0.000296

AC XY:

AN XY:

74310

show subpopulations

Gnomad4 AFR

AF:

0.000193

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000189

Gnomad4 NFE

AF:

0.000544

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000680

Hom.:

Bravo

AF:

0.000314

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000930

AC:

ExAC

AF:

0.000412

AC:

EpiCase

AF:

0.000600

EpiControl

AF:

0.000415

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

Nov 15, 2021

The c.707C>T (p.A236V) alteration is located in exon 5 (coding exon 5) of the DFFA gene. This alteration results from a C to T substitution at nucleotide position 707, causing the alanine (A) at amino acid position 236 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

0.080

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.47

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Benign

0.063

T;.

Eigen

Benign

-0.53

Eigen_PC

Benign

-0.58

FATHMM_MKL

Benign

0.24

LIST_S2

Benign

0.40

T;T

M_CAP

Benign

0.0053

MetaRNN

Benign

0.14

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.8

L;L

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.23

PROVEAN

Benign

-0.64

N;N

REVEL

Benign

0.041

Sift

Benign

0.11

T;T

Sift4G

Benign

0.18

T;T

Polyphen

0.13

B;P

Vest4

0.18

MVP

0.29

MPC

0.26

ClinPred

0.019

GERP RS

4.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

Varity_R

0.021

gMVP

0.066

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