rs146213252

Positions:

• chr12-49037591-A-C
• chr12-49037591-A-G
• chr12-49037591-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_003482.4(KMT2D):​c.9765T>G​(p.His3255Gln) 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. 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. H3255Y) 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: 0.0600

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), KMT2D. . Gene score misZ 3.7288 (greater than the threshold 3.09). Trascript score misZ 4.6964 (greater than threshold 3.09). GenCC has associacion of gene with Kabuki syndrome, branchial arch abnormalities, choanal atresia, athelia, hearing loss, and hypothyroidism syndrome, Kabuki syndrome 1, choanal atresia-athelia-hypothyroidism-delayed puberty-short stature syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.3206079).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KMT2D	NM_003482.4	c.9765T>G	p.His3255Gln	missense_variant	35/55	ENST00000301067.12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KMT2D	ENST00000301067.12	c.9765T>G	p.His3255Gln	missense_variant	35/55	5	NM_003482.4	A2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Uncertain	0.042	T
BayesDel_noAF	Benign	-0.18
CADD	Benign	12
DANN	Benign	0.86
DEOGEN2	Benign	0.24	T
Eigen	Benign	0.10
Eigen_PC	Benign	0.047
FATHMM_MKL	Benign	0.71	D
LIST_S2	Benign	0.77	T
M_CAP	Uncertain	0.18	D
MetaRNN	Benign	0.32	T
MetaSVM	Uncertain	-0.14	T
MutationAssessor	Benign	0.97	L
MutationTaster	Benign	0.99	D
PrimateAI	Uncertain	0.77	T
PROVEAN	Benign	-2.2	N
REVEL	Uncertain	0.41
Sift	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.40
MutPred		0.18		Gain of methylation at K3257 (P = 0.1013);
MVP		0.66
MPC		0.61
ClinPred		0.41	T
GERP RS		1.3
Varity_R		0.21
gMVP		0.26

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr12-49431374;