rs374686068

Variant names:

• chr2-27309920-G-A
• rs374686068
• NM_002437.5:c.523C>T

Your query was ambiguous. Multiple possible variants found:

• chr2-27309920-G-A
• chr2-27309920-G-T

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_002437.5(MPV17):​c.523C>T​(p.Arg175Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000013 in 1,613,600 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R175Q) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000012 (0 hom.)
• Consequence: MPV17 NM_002437.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 2.63
• Publications: 2 publications found

Genes affected

MPV17 (HGNC:7224): (mitochondrial inner membrane protein MPV17) This gene encodes a mitochondrial inner membrane protein that is implicated in the metabolism of reactive oxygen species. Mutations in this gene have been associated with the hepatocerebral form of mitochondrial DNA depletion syndrome (MDDS). [provided by RefSeq, Jul 2008]

MPV17 Gene-Disease associations (from GenCC):

• mitochondrial disease

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• mitochondrial DNA depletion syndrome 6 (hepatocerebral type)

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics
• Charcot-Marie-Tooth disease, axonal, type 2EE

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM1: In a chain Mitochondrial inner membrane protein Mpv17 (size 175) in uniprot entity MPV17_HUMAN there are 23 pathogenic changes around while only 5 benign (82%) in NM_002437.5
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.40131792).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002437.5. 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
	MPV17	NM_002437.5	MANE Select	c.523C>T	p.Arg175Trp	missense	Exon 8 of 8	NP_002428.1	P39210

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MPV17	ENST00000380044.6	TSL:1 MANE Select	c.523C>T	p.Arg175Trp	missense	Exon 8 of 8	ENSP00000369383.1	P39210
	MPV17	ENST00000233545.6	TSL:1	c.523C>T	p.Arg175Trp	missense	Exon 7 of 7	ENSP00000233545.2	P39210
	MPV17	ENST00000911060.1		c.673C>T	p.Arg225Trp	missense	Exon 10 of 10	ENSP00000581119.1

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152204 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000199 AC: 5 AN: 251086 AF XY: 0.0000221

Gnomad AFR exome AF: 0.000185

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000881

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000116 AC: 17 AN: 1461396 Hom.: 0 Cov.: 30 AF XY: 0.0000124 AC XY: 9 AN XY: 727046

African (AFR) AF: 0.0000598 AC: 2 AN: 33466

American (AMR) AF: 0.00 AC: 0 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39696

South Asian (SAS) AF: 0.0000232 AC: 2 AN: 86228

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

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

European-Non Finnish (NFE) AF: 0.00000990 AC: 11 AN: 1111582

Other (OTH) AF: 0.0000166 AC: 1 AN: 60386

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152204 Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3 AN XY: 74354

African (AFR) AF: 0.0000241 AC: 1 AN: 41456

American (AMR) AF: 0.00 AC: 0 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5196

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 68040

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.0000658 Hom.: 0

Bravo AF: 0.0000416

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.0000165 AC: 2

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.32
BayesDel_addAF	Benign	-0.082	T
BayesDel_noAF	Uncertain	-0.080
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.71	D
Eigen	Benign	0.12
Eigen_PC	Benign	0.21
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.91	D
M_CAP	Pathogenic	0.45	D
MetaRNN	Benign	0.40	T
MetaSVM	Uncertain	-0.26	T
MutationAssessor	Uncertain	2.2	M
PhyloP100		2.6
PrimateAI	Benign	0.20	T
PROVEAN	Uncertain	-4.3	D
REVEL	Uncertain	0.54
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0020	D
Polyphen		0.99	D
Vest4		0.14
MVP		0.90
MPC		0.93
ClinPred		0.53	D
GERP RS		6.0
Varity_R		0.16
gMVP		0.42
Mutation Taster		=79/21	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs374686068; hg19: chr2-27532788;