Genetic Variant L3MBTL4:p.Pro405Leu (chr18-6093514-G-A) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001330559.2(L3MBTL4):c.1214C>T(p.Pro405Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000353 in 1,612,470 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: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000036 ( 0 hom. )

Consequence

L3MBTL4
NM_001330559.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.52

Publications

2 publications found

Variant links:

Genes affected

L3MBTL4 (HGNC:26677): (L3MBTL histone methyl-lysine binding protein 4) Predicted to enable chromatin binding activity and histone binding activity. Predicted to be involved in negative regulation of transcription, DNA-templated. Predicted to be active in nucleus. [provided by Alliance of Genome Resources, Apr 2022]

L3MBTL4 links:

ENSG00000266846 (HGNC:):

ENSG00000266846 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.953

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
L3MBTL4	NM_001330559.2 link	c.1214C>T	p.Pro405Leu	missense_variant	Exon 15 of 19	ENST00000317931.12	NP_001317488.1	F8W9S8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
L3MBTL4	ENST00000317931.12 link	c.1214C>T	p.Pro405Leu	missense_variant	Exon 15 of 19	5	NM_001330559.2	ENSP00000318543.7	F8W9S8
L3MBTL4	ENST00000400104.7 link	c.1214C>T	p.Pro405Leu	missense_variant	Exon 15 of 17	1		ENSP00000382975.3	Q8NA19-2
L3MBTL4	ENST00000400105.6 link	c.1214C>T	p.Pro405Leu	missense_variant	Exon 15 of 20	2		ENSP00000382976.2	Q8NA19-1
ENSG00000266846	ENST00000659442.1 link	n.1423+4164G>A		intron_variant	Intron 7 of 7

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152078

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

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:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000360

AC:

AN:

249728

AF XY:

0.0000519

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000292

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000546

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000618

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000356

AC:

AN:

1460392

Hom.:

Cov.:

AF XY:

0.0000454

AC XY:

AN XY:

726414

show subpopulations

African (AFR)

AF:

0.0000300

AC:

AN:

33358

American (AMR)

AF:

0.0000225

AC:

AN:

44438

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26094

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39650

South Asian (SAS)

AF:

0.0000233

AC:

AN:

85860

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53366

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.0000387

AC:

AN:

1111540

Other (OTH)

AF:

0.0000497

AC:

AN:

60328

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.461

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152078

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74294

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41382

American (AMR)

AF:

0.00

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10596

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000588

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000302

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

Nov 13, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1214C>T (p.P405L) alteration is located in exon 15 (coding exon 13) of the L3MBTL4 gene. This alteration results from a C to T substitution at nucleotide position 1214, causing the proline (P) at amino acid position 405 to be replaced by a leucine (L). 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

0.96

BayesDel_addAF

Benign

-0.034

BayesDel_noAF

Benign

-0.10

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.28

T;T;.

Eigen

Uncertain

0.48

Eigen_PC

Uncertain

0.36

FATHMM_MKL

Benign

0.50

LIST_S2

Pathogenic

0.98

D;D;D

M_CAP

Benign

0.027

MetaRNN

Pathogenic

0.95

D;D;D

MetaSVM

Benign

-0.41

MutationAssessor

Pathogenic

3.3

M;.;M

PhyloP100

1.5

PrimateAI

Uncertain

0.52

PROVEAN

Pathogenic

-8.9

D;D;D

REVEL

Uncertain

0.43

Sift

Uncertain

0.0010

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

1.0

D;D;.

Vest4

0.59

MutPred

0.89

Loss of disorder (P = 0.0372);Loss of disorder (P = 0.0372);Loss of disorder (P = 0.0372);

MVP

0.71

ClinPred

0.98

GERP RS

3.4

Varity_R

0.62

gMVP

0.75

Mutation Taster

=98/2

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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18-6093514-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over