12-94581890-C-A

Variant names:

• chr12-94581890-C-A
• rs908685370
• NM_020698.4:c.727G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_020698.4(TMCC3):​c.727G>T​(p.Ala243Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,614,118 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign 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. A243T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: TMCC3 NM_020698.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.43
• Publications: 1 publications found

Genes affected

TMCC3 (HGNC:29199): (transmembrane and coiled-coil domain family 3) Enables 14-3-3 protein binding activity and identical protein binding activity. Located in endoplasmic reticulum. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12262085).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020698.4. 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
	TMCC3	NM_020698.4	MANE Select	c.727G>T	p.Ala243Ser	missense	Exon 2 of 4	NP_065749.3	Q9ULS5
	TMCC3	NM_001301036.2		c.634G>T	p.Ala212Ser	missense	Exon 2 of 4	NP_001287965.1	G3V207

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TMCC3	ENST00000261226.9	TSL:1 MANE Select	c.727G>T	p.Ala243Ser	missense	Exon 2 of 4	ENSP00000261226.4	Q9ULS5
	TMCC3	ENST00000551457.1	TSL:1	c.634G>T	p.Ala212Ser	missense	Exon 2 of 4	ENSP00000449888.1	G3V207
	TMCC3	ENST00000896389.1		c.727G>T	p.Ala243Ser	missense	Exon 2 of 5	ENSP00000566448.1

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152236 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

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: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251362 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461882 Hom.: 0 Cov.: 29 AF XY: 0.00000138 AC XY: 1 AN XY: 727244

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.0000224 AC: 1 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53414

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112008

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152236 Hom.: 0 Cov.: 33 AF XY: 0.0000134 AC XY: 1 AN XY: 74376

African (AFR) AF: 0.00 AC: 0 AN: 41456

American (AMR) AF: 0.000131 AC: 2 AN: 15282

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5204

South Asian (SAS) AF: 0.00 AC: 0 AN: 4834

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10628

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68040

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000189

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	19
DANN	Benign	0.93
DEOGEN2	Benign	0.013	T
Eigen	Benign	-0.36
Eigen_PC	Benign	-0.26
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.79	T
M_CAP	Benign	0.025	D
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.3	M
PhyloP100		2.4
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-0.65	N
REVEL	Benign	0.069
Sift	Benign	0.27	T
Sift4G	Benign	0.22	T
Polyphen		0.054	B
Vest4		0.12
MutPred		0.54		Gain of glycosylation at A243 (P = 0.0089)
MVP		0.067
MPC		0.32
ClinPred		0.33	T
GERP RS		4.1
Varity_R		0.073
gMVP		0.52
Mutation Taster		=83/17	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: rs908685370; hg19: chr12-94975666;