Genetic Variant KMT2D:p.Arg845Gly (chr12-49051150-G-C) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_003482.4(KMT2D):c.2533C>G(p.Arg845Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R845W) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

KMT2D
NM_003482.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -2.28

Publications

0 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 -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.051406324).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KMT2D	NM_003482.4 link	c.2533C>G	p.Arg845Gly	missense_variant	Exon 11 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.2533C>G	p.Arg845Gly	missense_variant	Exon 11 of 55	5	NM_003482.4	ENSP00000301067.7	O14686-1
KMT2D	ENST00000683543.2 link	c.2533C>G	p.Arg845Gly	missense_variant	Exon 11 of 56			ENSP00000506726.1	A0A804HHR9
KMT2D	ENST00000685166.1 link	c.2533C>G	p.Arg845Gly	missense_variant	Exon 10 of 54			ENSP00000509386.1	O14686-3
KMT2D	ENST00000692637.1 link	c.2533C>G	p.Arg845Gly	missense_variant	Exon 10 of 54			ENSP00000509666.1	A0A8I5KSG1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1360278

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

668360

African (AFR)

AF:

0.00

AC:

AN:

30216

American (AMR)

AF:

0.00

AC:

AN:

30176

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

20018

East Asian (EAS)

AF:

0.00

AC:

AN:

38992

South Asian (SAS)

AF:

0.00

AC:

AN:

70684

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49954

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5322

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1058872

Other (OTH)

AF:

0.00

AC:

AN:

56044

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.64

CADD

Benign

0.14

(source)

DANN

Benign

0.25

DEOGEN2

Benign

0.036

Eigen

Benign

-1.7

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.090

LIST_S2

Benign

0.66

M_CAP

Uncertain

0.25

MetaRNN

Benign

0.051

MetaSVM

Benign

-0.93

MutationAssessor

Benign

0.0

PhyloP100

-2.3

PrimateAI

Benign

0.19

PROVEAN

Benign

0.35

REVEL

Benign

0.030

Sift

Uncertain

0.016

Polyphen

0.0010

Vest4

0.070

MutPred

0.27

Loss of stability (P = 0.064);

MVP

0.093

MPC

0.24

ClinPred

0.066

GERP RS

-7.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.067

gMVP

0.16

Mutation Taster

=93/7

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over