chr12-49031700-C-A

Variant names:

• chr12-49031700-C-A
• rs1555187752
• NM_003482.4:c.13005G>T
• KMT2D p.Gln4335His

GermlineCancer (beta)

Variant summary

Our verdict is Uncertain significance.

+1 Uncertain · Cold

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 1 classification points (ACGS-UK Somatic Oncogenicity v2025). O3_ModerateB3_Supporting

The NM_003482.4(KMT2D):c.13005G>T (p.Gln4335His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The gene KMT2D is a tumor suppressor gene (CancerMine: 29 TSG, 29 oncogene, 10 driver citations). The gene KMT2D is a known oncogene (CancerMine: 29 TSG, 29 oncogene, 10 driver citations). The gene KMT2D is a cancer driver gene (CancerMine: 29 TSG, 29 oncogene, 10 driver citations). The variant is absent from the gnomAD population database at sites with sufficient sequencing coverage. In-silico predictor (REVEL) classifies this variant as likely benign. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain Significance (★★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: KMT2D NM_003482.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 0.0610
• Publications: 0 publications found

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, STRONG, MODERATE Submitted by: G2P, Illumina, PanelApp Australia
• Kabuki syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae), PanelApp Australia, Laboratory for Molecular Medicine, ClinGen
• 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

Classification according to ACGS-UK Somatic Oncogenicity v2025

Classification was made for transcript:

Our verdict: Uncertain_significance. The variant received 1 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	O3Absent or very rare in population		Absent or extremely rare in gnomAD (AC ≤ 2) — O3 moderate; GnomAD: AF = absent, AC = 0 — absent/extremely rare (O3 moderate [+2])
	B3Computational evidence does not support deleterious effect		Computational evidence does not support a deleterious effect; Missense variant — primary computational scorer does not support an oncogenic/deleterious effect; supports B3

Variant Effect in Transcripts

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

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	KMT2D NM_003482.4	MANE Select	c.13005G>T p.Gln4335His	missense	Exon 40 of 55	Prot: NP_003473.3 UniProt:

KMT2D NM_003482.4

MANE Select

HGVSc / HGVSpc.13005G>Tp.Gln4335His

Exon rankExon 40 of 55

missense

Prot: NP_003473.3UniProt: O14686-1

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	KMT2D ENST00000301067.12	TSL:5MANE Select	c.13005G>T p.Gln4335His	missense	Exon 40 of 55	Prot: ENSP00000301067.7 UniProt:
	KMT2D ENST00000683543.2		c.13005G>T p.Gln4335His	missense	Exon 40 of 56	Prot: ENSP00000506726.1 UniProt:
	KMT2D ENST00000685166.1		c.13014G>T p.Gln4338His	missense	Exon 39 of 54	Prot: ENSP00000509386.1 UniProt:

KMT2D ENST00000301067.12

TSL:5MANE Select

HGVSc / HGVSpc.13005G>Tp.Gln4335His

Exon rankExon 40 of 55

missense

Prot: ENSP00000301067.7UniProt: O14686-1

KMT2D ENST00000683543.2

HGVSc / HGVSpc.13005G>Tp.Gln4335His

Exon rankExon 40 of 56

missense

Prot: ENSP00000506726.1UniProt: A0A804HHR9

KMT2D ENST00000685166.1

HGVSc / HGVSpc.13014G>Tp.Gln4338His

Exon rankExon 39 of 54

missense

Prot: ENSP00000509386.1UniProt: O14686-3

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 5 sources Large-scale international reference populations
GnomAD3 genomes	AF:	AC:	Hom:	AN:	Cov:33
GnomAD4 exome	AF:	AC:	Hom:	AN:	Cov:39
GnomAD4 genome	AF:	AC:	Hom:	AN:	Cov:33
TOPMed (Bravo)	AF: 0.00000756	AC:	Hom:	AN:	Cov:
ALFA (dbGaP/dbSNP Allele Frequency Aggregator)	AF: 0.00	AC:0	Hom:0	AN:13470	Cov:

Showing 5 sources

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)
-	1	-	Kabuki syndrome (1)
-	1	-	KMT2D-related disorder (1)

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
AlphaGenome AVI	Uncertain	16
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.046	T
BayesDel_noAF	Benign	-0.30
CADD	Benign	14
DANN	Benign	0.61
DEOGEN2	Benign	0.055	T
Eigen	Benign	-0.17
Eigen_PC	Benign	-0.20
FATHMM_MKL	Benign	0.72	D
FuncVEP CTI	Benign	0.0035
GPN-Star LLR	N/A	-3.6
GPN-Star score	N/A	3.6
LIST_S2	Benign	0.51	T
M_CAP	Pathogenic	0.46	D
MetaRNN	Benign	0.27	T
MetaSVM	Uncertain	-0.16	T
Mutation Taster	N/A	69/31	polymorphism
MutationAssessor	Benign	0.0	N
PhyloP100	Benign	0.061
PrimateAI	Uncertain	0.50	T
PromoterAI	N/A	0.011	Neutral
PROVEAN	Benign	-1.2	N
RBP_binding_hub_radar	N/A	0.0
RBP_regulation_power_radar	N/A	1.7
REVEL	Benign	0.28
Sift	Uncertain	0.0020	D
Varity_R	N/A	0.14
VESM-3B	Benign	-2.9

Showing 29 of 29 scores

Splicing Scores

Algorithm	Calibrated pred.	Score	Prediction
Pangolin (max)	Benign	0.10
Pangolin gain	Benign	0.10	Position offset: -20
SpliceAI score (max)	Benign	0.010	Details are displayed if max score is > 0.2

Showing 3 of 3 scores

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

dbSNP: rs1555187752;

hg19: chr12-49425483;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar