chr5-140641877-G-A

Variant names:

• chr5-140641877-G-A
• NM_018502.5:c.322G>A

Variant summary

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

The NM_018502.5(TMCO6):​c.322G>A​(p.Gly108Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TMCO6 NM_018502.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.85
• Publications: 0 publications found

Genes affected

TMCO6 (HGNC:28814): (transmembrane and coiled-coil domains 6) Predicted to enable nuclear import signal receptor activity. Predicted to be involved in protein import into nucleus. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

NDUFA2 (HGNC:7685): (NADH:ubiquinone oxidoreductase subunit A2) The encoded protein is a subunit of the hydrophobic protein fraction of the NADH:ubiquinone oxidoreductase (complex 1), the first enzyme complex in the electron transport chain located in the inner mitochondrial membrane, and may be involved in regulating complex I activity or its assembly via assistance in redox processes. Mutations in this gene are associated with Leigh syndrome, an early-onset progressive neurodegenerative disorder. Alternative splicing results in multiple transcript variants.[provided by RefSeq, May 2010]

NDUFA2 Gene-Disease associations (from GenCC):

• mitochondrial disease

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• mitochondrial complex I deficiency, nuclear type 13

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Leigh syndrome

  Inheritance: AR Classification: MODERATE Submitted by: ClinGen
• cystic leukoencephalopathy without megalencephaly

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Leigh syndrome with leukodystrophy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018502.5. 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
	TMCO6	NM_018502.5	MANE Select	c.322G>A	p.Gly108Ser	missense	Exon 4 of 12	NP_060972.3
	TMCO6	NM_001300980.2		c.322G>A	p.Gly108Ser	missense	Exon 4 of 12	NP_001287909.1	Q96DC7-2
	TMCO6	NM_001300982.2		c.-118+97G>A		intron	N/A	NP_001287911.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TMCO6	ENST00000394671.8	TSL:2 MANE Select	c.322G>A	p.Gly108Ser	missense	Exon 4 of 12	ENSP00000378166.3	Q96DC7-1
	TMCO6	ENST00000252100.6	TSL:1	c.322G>A	p.Gly108Ser	missense	Exon 4 of 12	ENSP00000252100.6	Q96DC7-2
	TMCO6	ENST00000510336.5	TSL:1	n.483G>A		non_coding_transcript_exon	Exon 2 of 10

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.028	T
BayesDel_noAF	Benign	-0.28
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.26	T
Eigen	Pathogenic	0.72
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.019	T
MetaRNN	Uncertain	0.72	D
MetaSVM	Benign	-0.74	T
MutationAssessor	Benign	1.7	L
PhyloP100		5.9
PrimateAI	Benign	0.39	T
PROVEAN	Uncertain	-2.9	D
REVEL	Benign	0.18
Sift	Uncertain	0.017	D
Sift4G	Uncertain	0.043	D
Polyphen		1.0	D
Vest4		0.55
MutPred		0.44		Gain of helix (P = 0.0325)
MVP		0.70
MPC		0.51
ClinPred		0.97	D
GERP RS		5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.30
gMVP		0.36
Mutation Taster		=81/19	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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

hg19: chr5-140021462;