12-49052702-G-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_003482.4(KMT2D):c.1120C>A(p.Pro374Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000128 in 1,613,614 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00069 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000070 ( 0 hom. )

Consequence

KMT2D
NM_003482.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5O:1

Conservation

PhyloP100: 0.786

Publications

2 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 -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009560227).

BP6

Variant 12-49052702-G-T is Benign according to our data. Variant chr12-49052702-G-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 94149.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00069 (105/152230) while in subpopulation AFR AF = 0.00231 (96/41512). AF 95% confidence interval is 0.00194. There are 0 homozygotes in GnomAd4. There are 50 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 105 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003482.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMT2D	NM_003482.4	MANE Select	c.1120C>A	p.Pro374Thr	missense	Exon 10 of 55	NP_003473.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
KMT2D	ENST00000301067.12	TSL:5 MANE Select	c.1120C>A	p.Pro374Thr	missense	Exon 10 of 55	ENSP00000301067.7
KMT2D	ENST00000683543.2		c.1120C>A	p.Pro374Thr	missense	Exon 10 of 56	ENSP00000506726.1
KMT2D	ENST00000685166.1		c.1120C>A	p.Pro374Thr	missense	Exon 9 of 54	ENSP00000509386.1

Frequencies

GnomAD3 genomes

AF:

0.000697

AC:

106

AN:

152112

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00234

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

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:

0.00

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.000173

AC:

AN:

248180

AF XY:

0.000134

show subpopulations

Gnomad AFR exome

AF:

0.00266

Gnomad AMR exome

AF:

0.0000581

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000698

AC:

102

AN:

1461384

Hom.:

Cov.:

AF XY:

0.0000578

AC XY:

AN XY:

726974

show subpopulations

African (AFR)

AF:

0.00278

AC:

AN:

33476

American (AMR)

AF:

0.000134

AC:

AN:

44688

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26114

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86240

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53382

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111674

Other (OTH)

AF:

0.0000497

AC:

AN:

60356

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

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:

0.000690

AC:

105

AN:

152230

Hom.:

Cov.:

AF XY:

0.000672

AC XY:

AN XY:

74436

show subpopulations

African (AFR)

AF:

0.00231

AC:

AN:

41512

American (AMR)

AF:

0.000392

AC:

AN:

15296

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:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67998

Other (OTH)

AF:

0.00142

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.515

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:

0.000618

Hom.:

Bravo

AF:

0.000812

ESP6500AA

AF:

0.00250

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000240

AC:

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1Other:1

Apr 24, 2015

Eurofins Ntd Llc (ga)

Significance: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

Benign:1

Oct 12, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Kabuki syndrome

Benign:1

Jan 07, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not provided

Benign:1

Jul 25, 2019

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

KMT2D-related disorder

Benign:1

Sep 18, 2019

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 v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.073

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.28

CADD

Benign

(source)

DANN

Benign

0.89

DEOGEN2

Benign

0.045

Eigen

Benign

-0.16

Eigen_PC

Benign

-0.0011

FATHMM_MKL

Uncertain

0.89

LIST_S2

Benign

0.77

M_CAP

Uncertain

0.17

MetaRNN

Benign

0.0096

MetaSVM

Benign

-0.78

MutationAssessor

Benign

0.34

PhyloP100

0.79

PrimateAI

Benign

0.33

PROVEAN

Benign

-0.78

REVEL

Uncertain

0.34

Sift

Benign

0.54

Polyphen

0.44

Vest4

0.31

MVP

0.17

MPC

0.21

ClinPred

0.028

GERP RS

4.5

Varity_R

0.066

gMVP

0.23

Mutation Taster

=72/28

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over