11-118478083-C-G

Variant names:

• chr11-118478083-C-G
• rs868985556
• NM_001197104.2:c.3451C>G

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM1 PM2 PM5 PP3_Moderate

The NM_001197104.2(KMT2A):​c.3451C>G​(p.Arg1151Gly) 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 pathogenic 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. R1151Q) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 31)
• Consequence: KMT2A NM_001197104.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.45
• Publications: 0 publications found

Genes affected

KMT2A (HGNC:7132): (lysine methyltransferase 2A) This gene encodes a transcriptional coactivator that plays an essential role in regulating gene expression during early development and hematopoiesis. The encoded protein contains multiple conserved functional domains. One of these domains, the SET domain, is responsible for its histone H3 lysine 4 (H3K4) methyltransferase activity which mediates chromatin modifications associated with epigenetic transcriptional activation. This protein is processed by the enzyme Taspase 1 into two fragments, MLL-C and MLL-N. These fragments reassociate and further assemble into different multiprotein complexes that regulate the transcription of specific target genes, including many of the HOX genes. Multiple chromosomal translocations involving this gene are the cause of certain acute lymphoid leukemias and acute myeloid leukemias. Alternate splicing results in multiple transcript variants.[provided by RefSeq, Oct 2010]

KMT2A Gene-Disease associations (from GenCC):

• Wiedemann-Steiner syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Illumina, Labcorp Genetics (formerly Invitae), Orphanet, G2P, ClinGen

ENSG00000285827 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PM1: In a hotspot region, there are 10 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_001197104.2
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr11-118478084-G-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 452735.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.848

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001197104.2. 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
	KMT2A	NM_001197104.2	MANE Select	c.3451C>G	p.Arg1151Gly	missense	Exon 5 of 36	NP_001184033.1	Q03164-3
	KMT2A	NM_001412597.1		c.3550C>G	p.Arg1184Gly	missense	Exon 6 of 37	NP_001399526.1	A0AA34QVI8
	KMT2A	NM_005933.4		c.3451C>G	p.Arg1151Gly	missense	Exon 5 of 36	NP_005924.2	Q03164-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMT2A	ENST00000534358.8	TSL:1 MANE Select	c.3451C>G	p.Arg1151Gly	missense	Exon 5 of 36	ENSP00000436786.2	Q03164-3
	KMT2A	ENST00000389506.10	TSL:1	c.3451C>G	p.Arg1151Gly	missense	Exon 5 of 36	ENSP00000374157.5	Q03164-1
	ENSG00000285827	ENST00000648261.1		c.2221C>G	p.Arg741Gly	missense	Exon 5 of 7	ENSP00000498126.1	A0A3B3ITZ1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.68	D
Eigen	Pathogenic	0.70
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Pathogenic	0.37	D
MetaRNN	Pathogenic	0.85	D
MetaSVM	Uncertain	0.73	D
MutationAssessor	Uncertain	2.6	M
PhyloP100		2.4
PrimateAI	Pathogenic	0.87	D
PROVEAN	Uncertain	-3.8	D
REVEL	Pathogenic	0.77
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.010	D
Polyphen		1.0	D
Vest4		0.77
MutPred		0.49		Loss of MoRF binding (P = 0.0345)
MVP		0.94
MPC		2.1
ClinPred		0.99	D
GERP RS		5.1
Varity_R		0.78
gMVP		0.89
Mutation Taster		=25/75	disease causing

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

Other links and lift over

dbSNP: rs868985556; hg19: chr11-118348798;