chr11-118504435-T-C

Variant names:

• chr11-118504435-T-C
• rs1555047266
• NM_001197104.2:c.8543T>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP5_Moderate

The NM_001197104.2(KMT2A):​c.8543T>C​(p.Leu2848Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: KMT2A NM_001197104.2 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.58
• Publications: 1 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: G2P, Orphanet, Illumina, Labcorp Genetics (formerly Invitae), ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 11-118504435-T-C is Pathogenic according to our data. Variant chr11-118504435-T-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 435661.Status of the report is criteria_provided_single_submitter, 1 stars.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMT2A	NM_001197104.2	MANE Select	c.8543T>C	p.Leu2848Pro	missense	Exon 27 of 36	NP_001184033.1
	KMT2A	NM_001412597.1		c.8633T>C	p.Leu2878Pro	missense	Exon 28 of 37	NP_001399526.1
	KMT2A	NM_005933.4		c.8534T>C	p.Leu2845Pro	missense	Exon 27 of 36	NP_005924.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMT2A	ENST00000534358.8	TSL:1 MANE Select	c.8543T>C	p.Leu2848Pro	missense	Exon 27 of 36	ENSP00000436786.2
	KMT2A	ENST00000389506.10	TSL:1	c.8534T>C	p.Leu2845Pro	missense	Exon 27 of 36	ENSP00000374157.5
	KMT2A	ENST00000531904.7	TSL:2	c.8642T>C	p.Leu2881Pro	missense	Exon 28 of 37	ENSP00000432391.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Likely pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Wiedemann-Steiner syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.44	D
BayesDel_noAF	Pathogenic	0.39
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.50	D
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.87	D
M_CAP	Pathogenic	0.40	D
MetaRNN	Uncertain	0.72	D
MetaSVM	Uncertain	0.67	D
MutationAssessor	Benign	1.1	L
PhyloP100		7.6
PrimateAI	Pathogenic	0.94	D
PROVEAN	Uncertain	-3.3	D
REVEL	Pathogenic	0.66
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.011	D
Polyphen		1.0	D
Vest4		0.88
MutPred		0.31		Loss of stability (P = 0.0184)
MVP		0.98
MPC		1.5
ClinPred		0.97	D
GERP RS		6.1
Varity_R		0.93
gMVP		0.73
Mutation Taster		=4/96	disease causing (ClinVar)

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: rs1555047266; hg19: chr11-118375150;