chr12-49050596-G-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_ModerateBP6BS1BS2

The NM_003482.4(KMT2D):c.2992C>A(p.Pro998Thr) variant causes a missense change. The variant allele was found at a frequency of 0.000901 in 1,608,162 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P998A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00068 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00092 ( 2 hom. )

Consequence

KMT2D
NM_003482.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:9O:1

Conservation

PhyloP100: 4.56

Publications

8 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: Benign. The variant received -11 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.09465596).

BP6

Variant 12-49050596-G-T is Benign according to our data. Variant chr12-49050596-G-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 94209.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000677 (103/152164) while in subpopulation NFE AF = 0.0011 (75/67976). AF 95% confidence interval is 0.000902. There are 0 homozygotes in GnomAd4. There are 51 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 103 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KMT2D	NM_003482.4 link	c.2992C>A	p.Pro998Thr	missense_variant	Exon 12 of 55	ENST00000301067.12	NP_003473.3	O14686-1Q59FG6Q6PIA1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
KMT2D	ENST00000301067.12 link	c.2992C>A	p.Pro998Thr	missense_variant	Exon 12 of 55	5	NM_003482.4	ENSP00000301067.7	O14686-1
KMT2D	ENST00000683543.2 link	c.2992C>A	p.Pro998Thr	missense_variant	Exon 12 of 56			ENSP00000506726.1	A0A804HHR9
KMT2D	ENST00000685166.1 link	c.2992C>A	p.Pro998Thr	missense_variant	Exon 11 of 54			ENSP00000509386.1	O14686-3
KMT2D	ENST00000692637.1 link	c.2992C>A	p.Pro998Thr	missense_variant	Exon 11 of 54			ENSP00000509666.1	A0A8I5KSG1

Frequencies

GnomAD3 genomes

AF:

0.000677

AC:

103

AN:

152046

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000290

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000580

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00110

Gnomad OTH

AF:

0.00144

GnomAD2 exomes

AF:

0.000479

AC:

118

AN:

246192

AF XY:

0.000509

show subpopulations

Gnomad AFR exome

AF:

0.000130

Gnomad AMR exome

AF:

0.000437

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000167

Gnomad FIN exome

AF:

0.0000475

Gnomad NFE exome

AF:

0.000808

Gnomad OTH exome

AF:

0.00117

GnomAD4 exome

AF:

0.000924

AC:

1346

AN:

1455998

Hom.:

Cov.:

AF XY:

0.000910

AC XY:

658

AN XY:

723224

show subpopulations

African (AFR)

AF:

0.000240

AC:

AN:

33362

American (AMR)

AF:

0.000471

AC:

AN:

44560

Ashkenazi Jewish (ASJ)

AF:

0.0000386

AC:

AN:

25912

East Asian (EAS)

AF:

0.000101

AC:

AN:

39532

South Asian (SAS)

AF:

0.00

AC:

AN:

86028

European-Finnish (FIN)

AF:

0.0000754

AC:

AN:

53066

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5748

European-Non Finnish (NFE)

AF:

0.00112

AC:

1245

AN:

1107704

Other (OTH)

AF:

0.00105

AC:

AN:

60086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

178

268

357

446

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

144

192

240

<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:

0.000677

AC:

103

AN:

152164

Hom.:

Cov.:

AF XY:

0.000686

AC XY:

AN XY:

74394

show subpopulations

African (AFR)

AF:

0.000289

AC:

AN:

41518

American (AMR)

AF:

0.000589

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000582

AC:

AN:

5158

South Asian (SAS)

AF:

0.00

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.0000942

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00110

AC:

AN:

67976

Other (OTH)

AF:

0.00142

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.493

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:

0.000636

Hom.:

Bravo

AF:

0.000665

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000497

AC:

ESP6500EA

AF:

0.000838

AC:

ExAC

AF:

0.000471

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:9Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:5

Dec 10, 2019

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Aug 22, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jun 23, 2016

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Dec 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

KMT2D: BS1 -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

not specified

Benign:1Other:1

Feb 16, 2025

Laboratory of Genetics, Children's Clinical University Hospital Latvia

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Sep 19, 2013

ITMI

Significance:not provided

Review Status:no classification provided

Collection Method:reference population

- -

Kabuki syndrome 1

Uncertain:1

Dec 17, 2020

Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

KMT2D NM_003482.3 exon 11 p.Pro998Thr (c.2992C>A): This variant has not been reported in the literature but is present in 0.08% (103/126744) of European alleles in the Genome Aggregation Database (https://gnomad.broadinstitute.org/variant/12-49444379-G-T?dataset=gnomad_r2_1). This variant is present in ClinVar (Variation ID:94209). Evolutionary conservation suggests that this variant may impact the protein; computational predictive tools for this variant are unclear. In summary, data on this variant is insufficient for disease classification. Therefore, the clinical significance of this variant is uncertain. -

Choanal atresia-athelia-hypothyroidism-delayed puberty-short stature syndrome;CN030661:Kabuki syndrome 1

Uncertain:1

Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Kabuki syndrome

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Benign:1

Nov 16, 2021

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

KMT2D-related disorder

Benign:1

Oct 06, 2021

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

AlphaMissense

Uncertain

0.51

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.18

CADD

Benign

(source)

DANN

Benign

0.86

DEOGEN2

Benign

0.048

Eigen

Uncertain

0.19

Eigen_PC

Uncertain

0.27

FATHMM_MKL

Uncertain

0.97

LIST_S2

Benign

0.80

M_CAP

Uncertain

0.28

MetaRNN

Benign

0.095

MetaSVM

Benign

-0.49

MutationAssessor

Benign

0.81

PhyloP100

4.6

PrimateAI

Uncertain

0.65

PROVEAN

Benign

-1.4

REVEL

Uncertain

0.33

Sift

Pathogenic

0.0

Polyphen

0.89

Vest4

0.54

MVP

0.21

MPC

0.78

ClinPred

0.087

GERP RS

3.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.27

gMVP

0.22

Mutation Taster

=83/17

polymorphism

(source)

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

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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