chr1-10463093-C-T

Variant names:

• chr1-10463093-C-T
• rs370681036
• NM_004401.3:c.748G>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004401.3(DFFA):​c.748G>A​(p.Ala250Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,890 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A250S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: DFFA NM_004401.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.25
• Publications: 0 publications found

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]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.23315597).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004401.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DFFA	NM_004401.3	MANE Select	c.748G>A	p.Ala250Thr	missense	Exon 5 of 6	NP_004392.1	O00273-1
	DFFA	NM_213566.2		c.748G>A	p.Ala250Thr	missense	Exon 5 of 5	NP_998731.1	O00273-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DFFA	ENST00000377038.8	TSL:1 MANE Select	c.748G>A	p.Ala250Thr	missense	Exon 5 of 6	ENSP00000366237.3	O00273-1
	DFFA	ENST00000377036.2	TSL:1	c.748G>A	p.Ala250Thr	missense	Exon 5 of 5	ENSP00000366235.2	O00273-2
	DFFA	ENST00000866602.1		c.793G>A	p.Ala265Thr	missense	Exon 5 of 6	ENSP00000536661.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461890 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727246

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.0000187 AC: 1 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1112008

Other (OTH) AF: 0.0000166 AC: 1 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.087
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.40
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.19	T
Eigen	Benign	-0.21
Eigen_PC	Benign	-0.32
FATHMM_MKL	Benign	0.12	N
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.0066	T
MetaRNN	Benign	0.23	T
MetaSVM	Benign	-0.96	T
MutationAssessor	Uncertain	2.4	M
PhyloP100		1.3
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.036
Sift	Benign	0.038	D
Sift4G	Benign	0.29	T
Polyphen		0.89	P
Vest4		0.51
MutPred		0.52		Gain of phosphorylation at A250 (P = 0.0223)
MVP		0.34
MPC		0.53
ClinPred		0.40	T
GERP RS		2.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.3
Varity_R		0.062
gMVP		0.11
Mutation Taster		=89/11	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs370681036; hg19: chr1-10523150;