12-49041260-T-A

Variant names:

• chr12-49041260-T-A
• rs753121118
• NM_003482.4:c.6510A>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_003482.4(KMT2D):​c.6510A>T​(p.Gln2170His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q2170E) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KMT2D NM_003482.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.14
• 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, MODERATE Submitted by: Illumina, G2P
• Kabuki syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, 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

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMT2D	NM_003482.4	MANE Select	c.6510A>T	p.Gln2170His	missense	Exon 32 of 55	NP_003473.3	O14686-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMT2D	ENST00000301067.12	TSL:5 MANE Select	c.6510A>T	p.Gln2170His	missense	Exon 32 of 55	ENSP00000301067.7	O14686-1
	KMT2D	ENST00000683543.2		c.6510A>T	p.Gln2170His	missense	Exon 32 of 56	ENSP00000506726.1	A0A804HHR9
	KMT2D	ENST00000685166.1		c.6519A>T	p.Gln2173His	missense	Exon 31 of 54	ENSP00000509386.1	O14686-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.34
BayesDel_addAF	Uncertain	0.013	T
BayesDel_noAF	Benign	-0.22
CADD	Benign	22
DANN	Benign	0.87
DEOGEN2	Benign	0.050	T
Eigen	Benign	0.18
Eigen_PC	Benign	0.22
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Benign	0.76	T
M_CAP	Pathogenic	0.32	D
MetaRNN	Uncertain	0.53	D
MetaSVM	Benign	-0.57	T
MutationAssessor	Benign	0.20	N
PhyloP100		2.1
PrimateAI	Uncertain	0.67	T
PROVEAN	Benign	-1.1	N
REVEL	Uncertain	0.38
Sift	Benign	0.30	T
Polyphen		0.98	D
Vest4		0.58
MutPred		0.24		Gain of sheet (P = 0.1208)
MVP		0.52
MPC		0.61
ClinPred		0.45	T
GERP RS		4.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.099
gMVP		0.32
Mutation Taster		=70/30	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs753121118; hg19: chr12-49435043; COSMIC: COSV104616472; COSMIC: COSV104616472;