Genetic Variant NM_003482.4:c.2340C>T (chr12-49051343-G-A) – ACMG Classification: Benign (-15 pts)

Variant summary

Our verdict is Benign. Variant got -15 ACMG points: 0P and 15B. BP4_StrongBP6_ModerateBP7BS1BS2

The NM_003482.4(KMT2D):c.2340C>T(p.Cys780Cys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000418 in 1,603,190 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000074 ( 0 hom., cov: 29)

Exomes 𝑓: 0.000039 ( 0 hom. )

Consequence

KMT2D
NM_003482.4 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -0.0160

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -15 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

BP6

Variant 12-49051343-G-A is Benign according to our data. Variant chr12-49051343-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 463014.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-0.016 with no splicing effect.

BS1

Variant frequency is greater than expected in population sas. gnomad4_exome allele frequency = 0.0000385 (56/1454464) while in subpopulation SAS AF= 0.000455 (39/85664). AF 95% confidence interval is 0.000342. There are 0 homozygotes in gnomad4_exome. There are 39 alleles in male gnomad4_exome subpopulation. Median coverage is 37. This position pass quality control queck.

BS2

High AC in GnomAd4 at 11 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KMT2D	NM_003482.4 link	c.2340C>T	p.Cys780Cys	synonymous_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.2340C>T	p.Cys780Cys	synonymous_variant	Exon 11 of 55	5	NM_003482.4	ENSP00000301067.7	O14686-1
KMT2D	ENST00000683543.2 link	c.2340C>T	p.Cys780Cys	synonymous_variant	Exon 11 of 56			ENSP00000506726.1	A0A804HHR9
KMT2D	ENST00000685166.1 link	c.2340C>T	p.Cys780Cys	synonymous_variant	Exon 10 of 54			ENSP00000509386.1	O14686-3
KMT2D	ENST00000692637.1 link	c.2340C>T	p.Cys780Cys	synonymous_variant	Exon 10 of 54			ENSP00000509666.1	A0A8I5KSG1

Frequencies

GnomAD3 genomes

AF:

0.0000740

AC:

AN:

148594

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000174

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000665

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:

0.0000299

Gnomad OTH

AF:

0.000494

GnomAD3 exomes

AF:

0.0000790

AC:

AN:

240454

Hom.:

AF XY:

0.000130

AC XY:

AN XY:

131198

show subpopulations

Gnomad AFR exome

AF:

0.000276

Gnomad AMR exome

AF:

0.0000293

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000400

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000186

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000385

AC:

AN:

1454464

Hom.:

Cov.:

AF XY:

0.0000539

AC XY:

AN XY:

722906

show subpopulations

Gnomad4 AFR exome

AF:

0.0000900

Gnomad4 AMR exome

AF:

0.0000225

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000455

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000117

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000740

AC:

AN:

148726

Hom.:

Cov.:

AF XY:

0.0000964

AC XY:

AN XY:

72642

show subpopulations

Gnomad4 AFR

AF:

0.000174

Gnomad4 AMR

AF:

0.0000665

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000299

Gnomad4 OTH

AF:

0.000488

Alfa

AF:

0.0000843

Hom.:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Kabuki syndrome

Benign:1

Dec 24, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

1.9

DANN

Benign

0.22

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

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