19-3546266-C-G

Variant names:

• chr19-3546266-C-G
• rs34878396
• NM_174983.5:c.1183G>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_174983.5(MFSD12):​c.1183G>C​(p.Gly395Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,458,284 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G395S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: MFSD12 NM_174983.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.27
• Publications: 0 publications found

Genes affected

MFSD12 (HGNC:28299): (major facilitator superfamily domain containing 12) Enables cysteine transmembrane transporter activity. Involved in cysteine transmembrane transport; pigment metabolic process involved in pigmentation; and regulation of melanin biosynthetic process. Located in lysosome and melanosome. Part of late endosome. [provided by Alliance of Genome Resources, Apr 2022]

MFSD12-AS1 (HGNC:56727): (MFSD12 antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.918

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_174983.5. 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
	MFSD12	NM_174983.5	MANE Select	c.1183G>C	p.Gly395Arg	missense	Exon 7 of 10	NP_778148.2	Q6NUT3-1
	MFSD12	NM_001287529.2		c.1156G>C	p.Gly386Arg	missense	Exon 7 of 10	NP_001274458.1	Q6NUT3-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MFSD12	ENST00000355415.7	TSL:1 MANE Select	c.1183G>C	p.Gly395Arg	missense	Exon 7 of 10	ENSP00000347583.1	Q6NUT3-1
	MFSD12	ENST00000951867.1		c.1201G>C	p.Gly401Arg	missense	Exon 8 of 11	ENSP00000621926.1
	MFSD12	ENST00000589063.5	TSL:3	c.220G>C	p.Gly74Arg	missense	Exon 2 of 4	ENSP00000467635.1	K7EQ22

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1458284 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 725330

African (AFR) AF: 0.00 AC: 0 AN: 33458

American (AMR) AF: 0.00 AC: 0 AN: 44262

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26040

East Asian (EAS) AF: 0.00 AC: 0 AN: 39590

South Asian (SAS) AF: 0.00 AC: 0 AN: 85994

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51910

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111006

Other (OTH) AF: 0.00 AC: 0 AN: 60262

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.73
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
CADD	Pathogenic	28
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.60	D
Eigen	Pathogenic	0.80
Eigen_PC	Pathogenic	0.72
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.96	D
M_CAP	Pathogenic	0.45	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Pathogenic	0.85	D
MutationAssessor	Pathogenic	2.9	M
PhyloP100		7.3
PrimateAI	Uncertain	0.73	T
PROVEAN	Pathogenic	-6.9	D
REVEL	Pathogenic	0.76
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.0060	D
Polyphen		0.99	D
Vest4		0.71
MutPred		0.72		Gain of solvent accessibility (P = 0.0171)
MVP		0.78
ClinPred		1.0	D
GERP RS		4.6
PromoterAI		0.056	Neutral
Varity_R		0.77
gMVP		0.88
Mutation Taster		=81/19	polymorphism

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: rs34878396; hg19: chr19-3546264;