NM_033540.3:c.979T>C

Variant names:

• chr3-179375223-T-C
• rs149864152
• NM_033540.3:c.979T>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PP3_Moderate

The NM_033540.3(MFN1):​c.979T>C​(p.Cys327Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000651 in 1,606,000 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic 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. C327G) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.00036 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00068 (1 hom.)
• Consequence: MFN1 NM_033540.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.64
• Publications: 5 publications found

Genes affected

MFN1 (HGNC:18262): (mitofusin 1) The protein encoded by this gene is a mediator of mitochondrial fusion. This protein and mitofusin 2 are homologs of the Drosophila protein fuzzy onion (Fzo). They are mitochondrial membrane proteins that interact with each other to facilitate mitochondrial targeting. [provided by RefSeq, Jul 2008]

ACMG classification

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

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.899

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_033540.3. 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
	MFN1	NM_033540.3	MANE Select	c.979T>C	p.Cys327Arg	missense	Exon 10 of 18	NP_284941.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MFN1	ENST00000471841.6	TSL:1 MANE Select	c.979T>C	p.Cys327Arg	missense	Exon 10 of 18	ENSP00000420617.1	Q8IWA4-1
	MFN1	ENST00000263969.9	TSL:1	c.979T>C	p.Cys327Arg	missense	Exon 9 of 17	ENSP00000263969.5	Q8IWA4-1
	MFN1	ENST00000474903.1	TSL:1	c.568T>C	p.Cys190Arg	missense	Exon 6 of 12	ENSP00000419926.1	H7C5H5

Frequencies

GnomAD3 genomes AF: 0.000362 AC: 55 AN: 152066 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000725

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000655

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: 0.000603

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.000353 AC: 85 AN: 240506 AF XY: 0.000300

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000211

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000488

Gnomad NFE exome AF: 0.000692

Gnomad OTH exome AF: 0.000339

GnomAD4 exome AF: 0.000681 AC: 990 AN: 1453816 Hom.: 1 Cov.: 33 AF XY: 0.000665 AC XY: 481 AN XY: 722874

African (AFR) AF: 0.000181 AC: 6 AN: 33212

American (AMR) AF: 0.000230 AC: 10 AN: 43400

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25988

East Asian (EAS) AF: 0.00 AC: 0 AN: 39116

South Asian (SAS) AF: 0.00 AC: 0 AN: 85334

European-Finnish (FIN) AF: 0.0000189 AC: 1 AN: 52880

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5220

European-Non Finnish (NFE) AF: 0.000843 AC: 935 AN: 1108642

Other (OTH) AF: 0.000633 AC: 38 AN: 60024

GnomAD4 genome AF: 0.000361 AC: 55 AN: 152184 Hom.: 0 Cov.: 33 AF XY: 0.000363 AC XY: 27 AN XY: 74396

African (AFR) AF: 0.0000723 AC: 3 AN: 41522

American (AMR) AF: 0.000654 AC: 10 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5174

South Asian (SAS) AF: 0.00 AC: 0 AN: 4820

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10604

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 292

European-Non Finnish (NFE) AF: 0.000603 AC: 41 AN: 67990

Other (OTH) AF: 0.000473 AC: 1 AN: 2112

Alfa AF: 0.000531 Hom.: 0

Bravo AF: 0.000389

TwinsUK AF: 0.000270 AC: 1

ALSPAC AF: 0.000519 AC: 2

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.00128 AC: 11

ExAC AF: 0.000272 AC: 33

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	Pathogenic	0.89
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.56
CADD	Pathogenic	29
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.72	D
Eigen	Pathogenic	0.75
Eigen_PC	Pathogenic	0.75
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Pathogenic	0.49	D
MetaRNN	Pathogenic	0.90	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Uncertain	2.8	M
PhyloP100		7.6
PrimateAI	Pathogenic	0.85	D
PROVEAN	Pathogenic	-10	D
REVEL	Pathogenic	0.83
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0030	D
Polyphen		0.81	P
Vest4		0.94
MVP		0.98
MPC		0.66
ClinPred		0.93	D
GERP RS		5.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7
Varity_R		0.87
gMVP		0.87
Mutation Taster		=4/96	disease causing

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

Other links and lift over

dbSNP: rs149864152; hg19: chr3-179093011;