Genetic Variant KMT2D:p.Gln3917_Gln3919del (chr12-49032946-AGCTGCTGCT-A) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM4BP6_ModerateBS2

The NM_003482.4(KMT2D):c.11750_11758delAGCAGCAGC(p.Gln3917_Gln3919del) variant causes a disruptive inframe deletion change. The variant allele was found at a frequency of 0.0000516 in 1,549,680 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000047 ( 0 hom. )

Consequence

KMT2D
NM_003482.4 disruptive_inframe_deletion

Scores

Not classified

Clinical Significance

Likely benign criteria provided, single submitter B:2

Conservation

PhyloP100: 4.97

Publications

1 publications found

Variant links:

Genes affected

KMT2D (HGNC:7133): (lysine methyltransferase 2D) The protein encoded by this gene is a histone methyltransferase that methylates the Lys-4 position of histone H3. The encoded protein is part of a large protein complex called ASCOM, which has been shown to be a transcriptional regulator of the beta-globin and estrogen receptor genes. Mutations in this gene have been shown to be a cause of Kabuki syndrome. [provided by RefSeq, Oct 2010]

KMT2D Gene-Disease associations (from GenCC):

choanal atresia-athelia-hypothyroidism-delayed puberty-short stature syndrome
Inheritance: AD Classification: DEFINITIVE, MODERATE Submitted by: Illumina, G2P
Kabuki syndrome 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Laboratory for Molecular Medicine, ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics
branchial arch abnormalities, choanal atresia, athelia, hearing loss, and hypothyroidism syndrome
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
Kabuki syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

KMT2D links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

PM4

Nonframeshift variant in NON repetitive region in NM_003482.4.

BP6

Variant 12-49032946-AGCTGCTGCT-A is Benign according to our data. Variant chr12-49032946-AGCTGCTGCT-A is described in ClinVar as Likely_benign. ClinVar VariationId is 1994989.Status of the report is criteria_provided_single_submitter, 1 stars.

BS2

High AC in GnomAd4 at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KMT2D	NM_003482.4 link	c.11750_11758delAGCAGCAGC	p.Gln3917_Gln3919del	disruptive_inframe_deletion	Exon 40 of 55	ENST00000301067.12	NP_003473.3	O14686-1Q59FG6Q6PIA1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KMT2D	ENST00000301067.12 link	c.11750_11758delAGCAGCAGC	p.Gln3917_Gln3919del	disruptive_inframe_deletion	Exon 40 of 55	5	NM_003482.4	ENSP00000301067.7		O14686-1

Frequencies

GnomAD3 genomes

AF:

0.0000925

AC:

AN:

151288

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000219

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000658

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:

0.0000443

Gnomad OTH

AF:

0.000483

GnomAD2 exomes

AF:

0.0000659

AC:

AN:

151654

AF XY:

0.0000625

show subpopulations

Gnomad AFR exome

AF:

0.000243

Gnomad AMR exome

AF:

0.0000815

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000171

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000472

AC:

AN:

1398276

Hom.:

AF XY:

0.0000493

AC XY:

AN XY:

689654

show subpopulations

African (AFR)

AF:

0.000222

AC:

AN:

31564

American (AMR)

AF:

0.0000560

AC:

AN:

35696

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25182

East Asian (EAS)

AF:

0.00

AC:

AN:

35730

South Asian (SAS)

AF:

0.000164

AC:

AN:

79192

European-Finnish (FIN)

AF:

0.0000204

AC:

AN:

49016

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5122

European-Non Finnish (NFE)

AF:

0.0000389

AC:

AN:

1078850

Other (OTH)

AF:

0.0000173

AC:

AN:

57924

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.477

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000925

AC:

AN:

151404

Hom.:

Cov.:

AF XY:

0.0000947

AC XY:

AN XY:

73952

show subpopulations

African (AFR)

AF:

0.000218

AC:

AN:

41242

American (AMR)

AF:

0.0000657

AC:

AN:

15218

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3458

East Asian (EAS)

AF:

0.00

AC:

AN:

5156

South Asian (SAS)

AF:

0.00

AC:

AN:

4778

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10484

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000443

AC:

AN:

67772

Other (OTH)

AF:

0.000478

AC:

AN:

2094

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

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000364

Hom.:

Bravo

AF:

0.0000793

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Kabuki syndrome

Benign:1

Jan 22, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

KMT2D-related disorder

Benign:1

Aug 23, 2023

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

5.0

Mutation Taster

=146/54

polymorphism

(source)

Splicing

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over