Genetic Variant L3MBTL3:p.Ala243Val (chr6-130057466-C-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_032438.4(L3MBTL3):c.728C>T(p.Ala243Val) variant causes a missense change. The variant allele was found at a frequency of 0.0000199 in 1,610,652 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000019 ( 0 hom. )

Consequence

L3MBTL3
NM_032438.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.82

Variant links:

Genes affected

L3MBTL3 (HGNC:23035): (L3MBTL histone methyl-lysine binding protein 3) This gene encodes a member of the malignant brain tumor (MBT) family of chromatin interacting transcriptional repressors. Members of this family function as methyl-lysine readers, which recognize methylated lysine residues on histone protein tails, and are associated with the repression of gene expression. The encoded protein may regulate hematopoiesis. Homozygous deletion of this gene has been observed in human patients with medulloblastoma. [provided by RefSeq, Oct 2016]

L3MBTL3 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS2

High AC in GnomAdExome4 at 28 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
L3MBTL3	NM_032438.4 link	c.728C>T	p.Ala243Val	missense_variant	Exon 9 of 23	ENST00000361794.7	NP_115814.1	Q96JM7-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
L3MBTL3	ENST00000361794.7 link	c.728C>T	p.Ala243Val	missense_variant	Exon 9 of 23	5	NM_032438.4	ENSP00000354526.2		Q96JM7-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152130

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000699

AC:

AN:

243182

Hom.:

AF XY:

0.0000534

AC XY:

AN XY:

130996

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000354

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000222

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000907

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000192

AC:

AN:

1458522

Hom.:

Cov.:

AF XY:

0.0000221

AC XY:

AN XY:

724974

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000248

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000177

Gnomad4 SAS exome

AF:

0.0000118

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000630

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152130

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74312

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000302

ExAC

AF:

0.0000494

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 26, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.728C>T (p.A243V) alteration is located in exon 9 (coding exon 7) of the L3MBTL3 gene. This alteration results from a C to T substitution at nucleotide position 728, causing the alanine (A) at amino acid position 243 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

Uncertain

0.37

BayesDel_addAF

Benign

0.010

BayesDel_noAF

Uncertain

0.090

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.62

D;D;.;.;.;D

Eigen

Uncertain

0.68

Eigen_PC

Uncertain

0.65

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.91

.;D;.;.;D;.

M_CAP

Uncertain

0.11

MetaRNN

Uncertain

0.70

D;D;D;D;D;D

MetaSVM

Uncertain

0.79

MutationAssessor

Uncertain

2.6

M;M;.;.;.;M

PrimateAI

Uncertain

0.67

PROVEAN

Uncertain

-3.1

D;D;D;D;D;D

REVEL

Pathogenic

0.66

Sift

Uncertain

0.0040

D;D;D;D;D;D

Sift4G

Uncertain

0.0080

D;D;D;D;D;D

Polyphen

1.0

D;D;D;D;D;D

Vest4

0.76

MutPred

0.46

Gain of loop (P = 0.0195);Gain of loop (P = 0.0195);.;.;.;Gain of loop (P = 0.0195);

MVP

0.88

MPC

0.86

ClinPred

0.57

GERP RS

5.2

Varity_R

0.50

gMVP

0.60

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