12-49034644-G-C

Variant names:

• chr12-49034644-G-C
• rs1555189450
• NM_003482.4:c.10378C>G

Variant summary

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

The NM_003482.4(KMT2D):​c.10378C>G​(p.Gln3460Glu) variant causes a missense change involving the alteration of a 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 variant affecting the same amino acid position, but resulting in a different missense (i.e. Q3460R) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KMT2D NM_003482.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.87
• 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: 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

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.10378C>G	p.Gln3460Glu	missense	Exon 37 of 55	NP_003473.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMT2D	ENST00000301067.12	TSL:5 MANE Select	c.10378C>G	p.Gln3460Glu	missense	Exon 37 of 55	ENSP00000301067.7
	KMT2D	ENST00000683543.2		c.10378C>G	p.Gln3460Glu	missense	Exon 37 of 56	ENSP00000506726.1
	KMT2D	ENST00000685166.1		c.10387C>G	p.Gln3463Glu	missense	Exon 36 of 54	ENSP00000509386.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Benign	-0.090
CADD	Benign	23
DANN	Benign	0.94
DEOGEN2	Benign	0.064	T
Eigen	Pathogenic	0.76
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.91	D
M_CAP	Uncertain	0.22	D
MetaRNN	Uncertain	0.43	T
MetaSVM	Uncertain	0.20	D
MutationAssessor	Uncertain	2.1	M
PhyloP100		7.9
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-1.8	N
REVEL	Uncertain	0.38
Sift	Uncertain	0.0040	D
Polyphen		0.98	D
Vest4		0.41
MutPred		0.16		Loss of MoRF binding (P = 0.0337)
MVP		0.75
MPC		0.51
ClinPred		0.80	D
GERP RS		5.0
PromoterAI		0.0075	Neutral
Varity_R		0.21
gMVP		0.78
Mutation Taster		=67/33	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.080		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: rs1555189450; hg19: chr12-49428427;