14-103522171-G-C

Position:

• chr14-103522171-G-C

Variant summary

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

The ENST00000348956.7(CKB):​c.200C>G​(p.Pro67Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000689 in 1,451,568 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.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: CKB ENST00000348956.7 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.00

Genes affected

CKB (HGNC:1991): (creatine kinase B) The protein encoded by this gene is a cytoplasmic enzyme involved in energy homeostasis. The encoded protein reversibly catalyzes the transfer of phosphate between ATP and various phosphogens such as creatine phosphate. It acts as a homodimer in brain as well as in other tissues, and as a heterodimer with a similar muscle isozyme in heart. The encoded protein is a member of the ATP:guanido phosphotransferase protein family. A pseudogene of this gene has been characterized. [provided by RefSeq, Jul 2008]

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, 0.906

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CKB	NM_001823.5	c.200C>G	p.Pro67Arg	missense_variant	3/8	ENST00000348956.7	NP_001814.2
CKB	NM_001362531.2	c.200C>G	p.Pro67Arg	missense_variant	3/7		NP_001349460.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CKB	ENST00000348956.7	c.200C>G	p.Pro67Arg	missense_variant	3/8	1	NM_001823.5	ENSP00000299198	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000438 AC: 1 AN: 228254 Hom.: 0 AF XY: 0.00000803 AC XY: 1 AN XY: 124556

Gnomad AFR exome AF: 0.00

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: 0.00000985

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.89e-7 AC: 1 AN: 1451568 Hom.: 0 Cov.: 38 AF XY: 0.00000139 AC XY: 1 AN XY: 721242

Gnomad4 AFR exome AF: 0.00

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: 9.03e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000832 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.83
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.10
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.55	D;T;T
Eigen	Pathogenic	0.96
Eigen_PC	Pathogenic	0.83
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D;D;D
M_CAP	Pathogenic	0.48	D
MetaRNN	Pathogenic	0.91	D;D;D
MetaSVM	Uncertain	0.59	D
MutationAssessor	Pathogenic	4.2	H;.;.
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-8.5	D;D;D
REVEL	Pathogenic	0.74
Sift	Uncertain	0.0010	D;D;D
Sift4G	Uncertain	0.0080	D;.;.
Polyphen		1.0	D;.;.
Vest4		0.81
MutPred		0.75		Gain of catalytic residue at P67 (P = 0.0026);Gain of catalytic residue at P67 (P = 0.0026);.;
MVP		0.58
MPC		2.1
ClinPred		1.0	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.86
gMVP		0.79

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

Other links and lift over

dbSNP: rs11545348; hg19: chr14-103988508;