chr5-110739122-G-A

Position:

• chr5-110739122-G-A

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PS1_Moderate PM2

The NM_138773.4(SLC25A46):​c.3G>A​(p.Met1?) variant causes a start lost change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SLC25A46 NM_138773.4 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.86

Genes affected

SLC25A46 (HGNC:25198): (solute carrier family 25 member 46) This gene encodes a mitochondrial solute carrier protein family member. It functions in promoting mitochondrial fission, and prevents the formation of hyperfilamentous mitochondria. Mutation of this gene results in neuropathy and optic atrophy. [provided by RefSeq, Aug 2016]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Start lost variant, no new inframe start found.
• PS1: Another start lost variant in NM_138773.4 (SLC25A46) was described as [Pathogenic] in ClinVar as 374891
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC25A46	NM_138773.4	c.3G>A	p.Met1?	start_lost	1/8	ENST00000355943.8
SLC25A46	NM_001303249.3	c.3G>A	p.Met1?	start_lost	1/8
SLC25A46	NM_001303250.3	c.10+875G>A		intron_variant
SLC25A46	NR_138151.2	n.116G>A		non_coding_transcript_exon_variant	1/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC25A46	ENST00000355943.8	c.3G>A	p.Met1?	start_lost	1/8	1	NM_138773.4	P1
SLC25A46	ENST00000447245.6	c.3G>A	p.Met1?	start_lost	1/8	2
SLC25A46	ENST00000513807.5	c.-204+875G>A		intron_variant		2
SLC25A46	ENST00000508781.5	n.112+875G>A		intron_variant, non_coding_transcript_variant		4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1394664 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 687958

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Neuropathy, hereditary motor and sensory, type 6B Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 19, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. ClinVar contains an entry for this variant (Variation ID: 1428613). This variant has not been reported in the literature in individuals affected with SLC25A46-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change affects the initiator methionine of the SLC25A46 mRNA. The next in-frame methionine is located at codon 147. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.39
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.022	T;.
Eigen	Uncertain	0.57
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Benign	0.63	D
LIST_S2	Uncertain	0.90	D;D
M_CAP	Pathogenic	0.98	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Uncertain	0.62	D
MutationTaster	Benign	1.0	D;D;D;D
PROVEAN	Benign	-0.83	N;N
REVEL	Pathogenic	0.68
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		0.92	P;.
Vest4		0.95
MutPred		0.99		Gain of catalytic residue at M1 (P = 0.0998);Gain of catalytic residue at M1 (P = 0.0998);
MVP		0.82
ClinPred		1.0	D
GERP RS		4.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.94
gMVP		0.46

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: chr5-110074823;