Variant chr15-43598830-A-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001375484.1(CKMT1B):c.1015A>G(p.Ser339Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000174 in 1,606,406 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00010 ( 1 hom., cov: 29)

Exomes 𝑓: 0.0000089 ( 0 hom. )

Consequence

CKMT1B
NM_001375484.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.55

Variant links:

Genes affected

CKMT1B (HGNC:1995): (creatine kinase, mitochondrial 1B) Mitochondrial creatine (MtCK) kinase 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. Many malignant cancers with poor prognosis have shown overexpression of ubiquitous mitochondrial creatine kinase; this may be related to high energy turnover and failure to eliminate cancer cells via apoptosis. Ubiquitous mitochondrial creatine kinase has 80% homology with the coding exons of sarcomeric mitochondrial creatine kinase. Two genes located near each other on chromosome 15 have been identified which encode identical mitochondrial creatine kinase proteins. [provided by RefSeq, Jul 2008]

CKMT1B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.1560362).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CKMT1B	NM_001375484.1 linkuse as main transcript	c.1015A>G	p.Ser339Gly	missense_variant	8/9	ENST00000441322.6	NP_001362413.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CKMT1B	ENST00000441322.6 linkuse as main transcript	c.1015A>G	p.Ser339Gly	missense_variant	8/9	1	NM_001375484.1	ENSP00000413255	P1	P12532-1
CKMT1B	ENST00000300283.10 linkuse as main transcript	c.1015A>G	p.Ser339Gly	missense_variant	9/10	5		ENSP00000300283	P1	P12532-1
CKMT1B	ENST00000437534.3 linkuse as main transcript	c.*935A>G		3_prime_UTR_variant, NMD_transcript_variant	8/9	2		ENSP00000416717

Frequencies

GnomAD3 genomes

AF:

0.000100

AC:

AN:

149728

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000354

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000658

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

GnomAD3 exomes

AF:

0.0000243

AC:

AN:

246898

Hom.:

AF XY:

0.00000749

AC XY:

AN XY:

133496

show subpopulations

Gnomad AFR exome

AF:

0.000378

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS 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:

0.00000892

AC:

AN:

1456678

Hom.:

Cov.:

AF XY:

0.00000414

AC XY:

AN XY:

724720

show subpopulations

Gnomad4 AFR exome

AF:

0.000367

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.000100

AC:

AN:

149728

Hom.:

Cov.:

AF XY:

0.000137

AC XY:

AN XY:

73058

show subpopulations

Gnomad4 AFR

AF:

0.000354

Gnomad4 AMR

AF:

0.0000658

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000130

Hom.:

Bravo

AF:

0.000110

ESP6500AA

AF:

0.000228

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 24, 2024

The c.1015A>G (p.S339G) alteration is located in exon 9 (coding exon 8) of the CKMT1B gene. This alteration results from a A to G substitution at nucleotide position 1015, causing the serine (S) at amino acid position 339 to be replaced by a glycine (G). 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

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.59

CADD

Benign

DANN

Uncertain

0.98

Eigen

Benign

-0.42

Eigen_PC

Benign

-0.29

FATHMM_MKL

Uncertain

0.93

M_CAP

Benign

0.0097

MetaRNN

Benign

0.16

T;T

MetaSVM

Benign

-1.1

MutationTaster

Benign

0.97

N;N;D

PrimateAI

Benign

0.47

PROVEAN

Benign

-1.8

N;N

REVEL

Benign

0.031

Sift

Uncertain

0.0050

D;D

Sift4G

Benign

0.090

T;T

Vest4

0.36

MVP

0.42

MPC

0.83

ClinPred

0.067

GERP RS

3.5

gMVP

0.20

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over