X-130129626-G-C

Position:

• chrX-130129626-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3 PP5

The NM_004208.4(AIFM1):​c.1773C>G​(p.Ile591Met) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely pathogenic (no stars).

• Frequency: Genomes: not found (cov: 23)
• Consequence: AIFM1 NM_004208.4 missense, splice_region
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 0.955

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:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.779
• PP5: Variant X-130129626-G-C is Pathogenic according to our data. Variant chrX-130129626-G-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1703042.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AIFM1	NM_004208.4	c.1773C>G	p.Ile591Met	missense_variant, splice_region_variant	16/16	ENST00000287295.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AIFM1	ENST00000287295.8	c.1773C>G	p.Ile591Met	missense_variant, splice_region_variant	16/16	1	NM_004208.4

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 23

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Deafness, X-linked 5 Pathogenic:1

Likely pathogenic, no assertion criteria provided

clinical testing

Deafness Molecular Diagnostic Center, Chinese PLA General Hospital

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.60
BayesDel_addAF	Pathogenic	0.29	D
BayesDel_noAF	Pathogenic	0.17
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.35	T;.;.;D
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Uncertain	0.94	D;D;D;D
M_CAP	Uncertain	0.23	D
MetaRNN	Pathogenic	0.78	D;D;D;D
MetaSVM	Uncertain	0.17	D
MutationAssessor	Uncertain	2.5	.;.;.;M
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	-2.0	N;N;N;N
REVEL	Uncertain	0.41
Sift	Benign	0.033	D;T;T;T
Sift4G	Benign	0.072	T;T;T;T
Polyphen		0.64, 0.78, 0.90	.;P;P;P
Vest4		0.84
MutPred		0.45		.;.;.;Loss of methylation at K590 (P = 0.0268);
MVP		0.99
MPC		0.96
ClinPred		0.94	D
GERP RS		3.3
Varity_R		0.82
gMVP		0.97

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

No publications associated with this variant yet.

Other links and lift over

hg19: chrX-129263601;