NM_004208.4:c.1227T>A

Variant names:

• chrX-130136123-A-T
• NM_004208.4:c.1227T>A
• AIFM1 p.Thr409Thr

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_004208.4(AIFM1):​c.1227T>A​(p.Thr409Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. T409T) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 23)
• Consequence: AIFM1 NM_004208.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.181
• Publications: 0 publications found

Genes affected

AIFM1 (HGNC:8768): (apoptosis inducing factor mitochondria associated 1) This gene encodes a flavoprotein essential for nuclear disassembly in apoptotic cells, and it is found in the mitochondrial intermembrane space in healthy cells. Induction of apoptosis results in the translocation of this protein to the nucleus where it affects chromosome condensation and fragmentation. In addition, this gene product induces mitochondria to release the apoptogenic proteins cytochrome c and caspase-9. Mutations in this gene cause combined oxidative phosphorylation deficiency 6 (COXPD6), a severe mitochondrial encephalomyopathy, as well as Cowchock syndrome, also known as X-linked recessive Charcot-Marie-Tooth disease-4 (CMTX-4), a disorder resulting in neuropathy, and axonal and motor-sensory defects with deafness and cognitive disability. Alternative splicing results in multiple transcript variants. A related pseudogene has been identified on chromosome 10. [provided by RefSeq, Aug 2015]

RAB33A (HGNC:9773): (RAB33A, member RAS oncogene family) The protein encoded by this gene belongs to the small GTPase superfamily, Rab family. It is GTP-binding protein and may be involved in vesicle transport. [provided by RefSeq, Jul 2008]

ENSG00000286650 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.53).
• BP7: Synonymous conserved (PhyloP=-0.181 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004208.4. 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
	AIFM1	NM_004208.4	MANE Select	c.1227T>A	p.Thr409Thr	synonymous	Exon 12 of 16	NP_004199.1	O95831-1
	AIFM1	NM_145812.3		c.1215T>A	p.Thr405Thr	synonymous	Exon 12 of 16	NP_665811.1	O95831-3
	AIFM1	NM_001130846.4		c.210T>A	p.Thr70Thr	synonymous	Exon 3 of 7	NP_001124318.2	E9PMA0

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AIFM1	ENST00000287295.8	TSL:1 MANE Select	c.1227T>A	p.Thr409Thr	synonymous	Exon 12 of 16	ENSP00000287295.3	O95831-1
	AIFM1	ENST00000675092.1		c.1227T>A	p.Thr409Thr	synonymous	Exon 12 of 16	ENSP00000501772.1	A0A6Q8PFE1
	AIFM1	ENST00000319908.8	TSL:1	c.1224T>A	p.Thr408Thr	synonymous	Exon 12 of 16	ENSP00000315122.4	A0A7I2PK44

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 23

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.53
CADD	Benign	7.4
DANN	Benign	0.68
PhyloP100		-0.18
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chrX-129270098;