12-57780255-G-T

Variant summary

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

The NM_015433.3(EEF1AKMT3):c.290G>T(p.Gly97Val) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000546 in 1,611,632 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G97E) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000072 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000053 (0 hom.)
• Consequence: EEF1AKMT3 NM_015433.3 missense, splice_region
• Scores: Splicing: ADA: 0.9992
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.05

Genes affected

EEF1AKMT3 (HGNC:24936): (EEF1A lysine methyltransferase 3) Enables heat shock protein binding activity and protein-lysine N-methyltransferase activity. Involved in peptidyl-lysine methylation. Located in several cellular components, including centrosome; chromosome; and nucleoplasm. Part of protein-containing complex. [provided by Alliance of Genome Resources, Apr 2022]

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, 0.857

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EEF1AKMT3	NM_015433.3	c.290G>T	p.Gly97Val	missense_variant, splice_region_variant	3/3	ENST00000300209.13
EEF1AKMT3	NM_206914.2	c.429G>T	p.Arg143Ser	missense_variant, splice_region_variant	4/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EEF1AKMT3	ENST00000300209.13	c.290G>T	p.Gly97Val	missense_variant, splice_region_variant	3/3	1	NM_015433.3	P1
EEF1AKMT3	ENST00000333012.5	c.429G>T	p.Arg143Ser	missense_variant, splice_region_variant	4/4	1
EEF1AKMT3	ENST00000548256.5	c.303G>T	p.Arg101Ser	missense_variant, splice_region_variant	4/4	4
EEF1AKMT3	ENST00000551420.1	c.-254G>T		splice_region_variant, 5_prime_UTR_variant	3/3	2

Frequencies

GnomAD3 genomes AF: 0.0000591 AC: 9 AN: 152158 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000145

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000941

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000530 AC: 13 AN: 245330 Hom.: 0 AF XY: 0.0000451 AC XY: 6 AN XY: 133114

Gnomad AFR exome AF: 0.000124

Gnomad AMR exome AF: 0.000121

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000664

Gnomad FIN exome AF: 0.0000934

Gnomad NFE exome AF: 0.0000271

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000528 AC: 77 AN: 1459356 Hom.: 0 Cov.: 31 AF XY: 0.0000510 AC XY: 37 AN XY: 726130

Gnomad4 AFR exome AF: 0.0000901

Gnomad4 AMR exome AF: 0.0000457

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.0000581

Gnomad4 FIN exome AF: 0.0000749

Gnomad4 NFE exome AF: 0.0000477

Gnomad4 OTH exome AF: 0.000133

GnomAD4 genome AF: 0.0000722 AC: 11 AN: 152276 Hom.: 0 Cov.: 32 AF XY: 0.0000806 AC XY: 6 AN XY: 74462

Gnomad4 AFR AF: 0.000193

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0000941

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000945

ExAC AF: 0.0000659 AC: 8

EpiCase AF: 0.000109

EpiControl AF: 0.0000594

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

Jun 11, 2021

The c.290G>T (p.G97V) alteration is located in exon 3 (coding exon 3) of the METTL21B gene. This alteration results from a G to T substitution at nucleotide position 290, causing the glycine (G) at amino acid position 97 to be replaced by a valine (V). 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	0.92
BayesDel_addAF	Uncertain	0.099	D
BayesDel_noAF	Pathogenic	0.14
Cadd	Pathogenic	33
Dann	Uncertain	1.0
DEOGEN2	Benign	0.050	T
Eigen	Uncertain	0.61
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.82	T
M_CAP	Uncertain	0.11	D
MetaRNN	Pathogenic	0.86	D
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	0.99	D;D;D;D
PrimateAI	Uncertain	0.60	T
PROVEAN	Pathogenic	-8.2	D
REVEL	Uncertain	0.58
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.86
MutPred		0.73		Gain of catalytic residue at G97 (P = 0.081);
MVP		0.83
MPC		1.8
ClinPred		0.69	D
GERP RS		5.2
Varity_R		0.93
gMVP		0.83

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.95
SpliceAI score (max)		0.11		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: rs113423250; hg19: chr12-58174038;