Genetic Variant CSKMT:p.Asp144Asn (chr11-62666758-G-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001043229.2(CSKMT):c.430G>A(p.Asp144Asn) variant causes a missense change. The variant allele was found at a frequency of 0.00000991 in 1,614,056 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000096 ( 0 hom. )

Consequence

CSKMT
NM_001043229.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.32

Variant links:

Genes affected

CSKMT (HGNC:33113): (citrate synthase lysine methyltransferase) Enables protein-lysine N-methyltransferase activity. Involved in peptidyl-lysine dimethylation; peptidyl-lysine monomethylation; and peptidyl-lysine trimethylation. Predicted to be located in mitochondrion. [provided by Alliance of Genome Resources, Apr 2022]

CSKMT links:

LBHD1 (HGNC:28351): (LBH domain containing 1) This gene shares three exons in common with another gene, chromosome 11 open reading frame 98 (GeneID:102288414), but the encoded protein uses a reading frame that is different from that of the chromosome 11 open reading frame 98 gene. [provided by RefSeq, Nov 2017]

LBHD1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CSKMT	NM_001043229.2 link	c.430G>A	p.Asp144Asn	missense_variant	Exon 3 of 3	ENST00000532971.2	NP_001036694.1	A8MUP2
LBHD1	NM_024099.5 link	c.538+765C>T		intron_variant	Intron 4 of 6	ENST00000354588.8	NP_077004.2	Q9BQE6-2A0A024R584

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CSKMT	ENST00000532971.2 link	c.430G>A	p.Asp144Asn	missense_variant	Exon 3 of 3	2	NM_001043229.2	ENSP00000431287.1		A8MUP2
LBHD1	ENST00000354588.8 link	c.538+765C>T		intron_variant	Intron 4 of 6	1	NM_024099.5	ENSP00000346600.3		Q9BQE6-2

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152226

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000120

AC:

AN:

249302

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135308

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

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:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000958

AC:

AN:

1461830

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727220

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

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:

0.0000108

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152226

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74358

show subpopulations

Gnomad4 AFR

AF:

0.0000482

Gnomad4 AMR

AF:

0.00

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

Bravo

AF:

0.00000378

ExAC

AF:

0.00000827

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 30, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.430G>A (p.D144N) alteration is located in exon 3 (coding exon 2) of the METTL12 gene. This alteration results from a G to A substitution at nucleotide position 430, causing the aspartic acid (D) at amino acid position 144 to be replaced by an asparagine (N). 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

Benign

0.13

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.36

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.027

Eigen

Benign

0.14

Eigen_PC

Benign

0.10

FATHMM_MKL

Uncertain

0.93

LIST_S2

Benign

0.69

M_CAP

Benign

0.022

MetaRNN

Uncertain

0.72

MetaSVM

Benign

-0.71

PrimateAI

Benign

0.47

PROVEAN

Uncertain

-4.0

REVEL

Benign

0.23

Sift

Benign

0.062

Sift4G

Pathogenic

0.0

Polyphen

0.90

Vest4

0.28

MutPred

0.91

Gain of disorder (P = 0.2378);

MVP

0.74

MPC

0.028

ClinPred

0.86

GERP RS

3.6

Varity_R

0.32

gMVP

0.57

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