1-167920580-T-G

Position:

• chr1-167920580-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001143674.4(MPC2):​c.202A>C​(p.Ser68Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MPC2 NM_001143674.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.27

Genes affected

MPC2 (HGNC:24515): (mitochondrial pyruvate carrier 2) Enables identical protein binding activity. Predicted to be involved in mitochondrial pyruvate transmembrane transport. Predicted to act upstream of or within mitochondrial acetyl-CoA biosynthetic process from pyruvate and positive regulation of insulin secretion involved in cellular response to glucose stimulus. Located in mitochondrion. [provided by Alliance of Genome Resources, Apr 2022]

DCAF6 (HGNC:30002): (DDB1 and CUL4 associated factor 6) The protein encoded by this gene is a ligand-dependent coactivator of nuclear receptors, including nuclear receptor subfamily 3 group C member 1 (NR3C1), glucocorticoid receptor (GR), and androgen receptor (AR). The encoded protein and DNA damage binding protein 2 (DDB2) may act as tumor promoters and tumor suppressors, respectively, by regulating the level of androgen receptor in prostate tissues. In addition, this protein can act with glucocorticoid receptor to promote human papillomavirus gene expression. [provided by RefSeq, Mar 2017]

MPC2 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.876

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MPC2	NM_001143674.4	c.202A>C	p.Ser68Arg	missense_variant	4/6	ENST00000271373.9	NP_001137146.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MPC2	ENST00000271373.9	c.202A>C	p.Ser68Arg	missense_variant	4/6	1	NM_001143674.4	ENSP00000271373.4
MPC2	ENST00000367846.8	c.202A>C	p.Ser68Arg	missense_variant	3/5	1		ENSP00000356820.4
MPC2	ENST00000458574.1	c.202A>C	p.Ser68Arg	missense_variant	4/5	5		ENSP00000392874.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 30, 2024

The c.202A>C (p.S68R) alteration is located in exon 4 (coding exon 3) of the MPC2 gene. This alteration results from a A to C substitution at nucleotide position 202, causing the serine (S) at amino acid position 68 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.42
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.85	D;D;.
Eigen	Pathogenic	0.99
Eigen_PC	Pathogenic	0.93
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Pathogenic	0.99	.;D;D
M_CAP	Uncertain	0.14	D
MetaRNN	Pathogenic	0.88	D;D;D
MetaSVM	Pathogenic	0.83	D
MutationAssessor	Pathogenic	4.1	H;H;.
PrimateAI	Uncertain	0.78	T
PROVEAN	Pathogenic	-4.9	D;D;D
REVEL	Pathogenic	0.86
Sift	Uncertain	0.0010	D;D;D
Sift4G	Pathogenic	0.0010	D;D;D
Polyphen		1.0	D;D;.
Vest4		0.96
MutPred		0.64		Loss of glycosylation at S68 (P = 0.0216);Loss of glycosylation at S68 (P = 0.0216);Loss of glycosylation at S68 (P = 0.0216);
MVP		0.65
MPC		1.4
ClinPred		1.0	D
GERP RS		6.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.78
gMVP		0.99

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-167889818;