chr5-81252833-C-A

Variant names:

• chr5-81252833-C-A
• rs1756869812
• NM_001099735.2:c.291C>A

Variant summary

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

The NM_001099735.2(CKMT2):​c.291C>A​(p.Asn97Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,884 control chromosomes in the GnomAD database, with no homozygous occurrence. 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)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CKMT2 NM_001099735.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.550
• Publications: 0 publications found

Genes affected

CKMT2 (HGNC:1996): (creatine kinase, mitochondrial 2) Mitochondrial creatine kinase (MtCK) is responsible for the transfer of high energy phosphate from mitochondria to the cytosolic carrier, creatine. It belongs to the creatine kinase isoenzyme family. It exists as two isoenzymes, sarcomeric MtCK and ubiquitous MtCK, encoded by separate genes. Mitochondrial creatine kinase occurs in two different oligomeric forms: dimers and octamers, in contrast to the exclusively dimeric cytosolic creatine kinase isoenzymes. Sarcomeric mitochondrial creatine kinase has 80% homology with the coding exons of ubiquitous mitochondrial creatine kinase. This gene contains sequences homologous to several motifs that are shared among some nuclear genes encoding mitochondrial proteins and thus may be essential for the coordinated activation of these genes during mitochondrial biogenesis. Three transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008]

CKMT2-AS1 (HGNC:48997): (CKMT2 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, 0.906

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001099735.2. 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
	CKMT2	NM_001099735.2	MANE Select	c.291C>A	p.Asn97Lys	missense	Exon 3 of 10	NP_001093205.1	P17540
	CKMT2	NM_001099736.2		c.291C>A	p.Asn97Lys	missense	Exon 3 of 10	NP_001093206.1	P17540
	CKMT2	NM_001825.3		c.291C>A	p.Asn97Lys	missense	Exon 4 of 11	NP_001816.2	P17540

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CKMT2	ENST00000254035.9	TSL:1 MANE Select	c.291C>A	p.Asn97Lys	missense	Exon 3 of 10	ENSP00000254035.4	P17540
	CKMT2	ENST00000424301.6	TSL:1	c.291C>A	p.Asn97Lys	missense	Exon 4 of 11	ENSP00000404203.2	P17540
	CKMT2	ENST00000865076.1		c.291C>A	p.Asn97Lys	missense	Exon 3 of 10	ENSP00000535135.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461884 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727244

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

American (AMR) AF: 0.00 AC: 0 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: 86258

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: 8.99e-7 AC: 1 AN: 1112006

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

GnomAD4 genome Cov.: 32

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	1.0
BayesDel_addAF	Uncertain	0.043	T
BayesDel_noAF	Benign	-0.18
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.61	D
Eigen	Uncertain	0.65
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.95	D
M_CAP	Uncertain	0.18	D
MetaRNN	Pathogenic	0.91	D
MetaSVM	Uncertain	0.25	D
MutationAssessor	Pathogenic	4.1	H
PhyloP100		0.55
PrimateAI	Pathogenic	0.83	D
PROVEAN	Pathogenic	-5.8	D
REVEL	Pathogenic	0.70
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.95
MutPred		0.81		Gain of methylation at N97 (P = 0.0038)
MVP		0.89
MPC		1.1
ClinPred		1.0	D
GERP RS		4.3
Varity_R		0.88
gMVP		0.83
Mutation Taster		=6/94	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: rs1756869812; hg19: chr5-80548652;