chr11-118512002-G-C

Position:

• chr11-118512002-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP2 PP5_Moderate

The NM_001197104.2(KMT2A):​c.11123G>C​(p.Arg3708Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R3708H) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KMT2A NM_001197104.2 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 5.38

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]

TTC36-AS1 (HGNC:55495): (TTC36 and KMT2A antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 5 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), KMT2A. . Gene score misZ 6.2276 (greater than the threshold 3.09). Trascript score misZ 8.7715 (greater than threshold 3.09). GenCC has associacion of gene with Wiedemann-Steiner syndrome.
• PP5: Variant 11-118512002-G-C is Pathogenic according to our data. Variant chr11-118512002-G-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2499544.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KMT2A	NM_001197104.2	c.11123G>C	p.Arg3708Pro	missense_variant	31/36	ENST00000534358.8
TTC36-AS1	NR_120574.1	n.420C>G		non_coding_transcript_exon_variant	3/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KMT2A	ENST00000534358.8	c.11123G>C	p.Arg3708Pro	missense_variant	31/36	1	NM_001197104.2	P4
TTC36-AS1	ENST00000532597.6	n.340C>G		non_coding_transcript_exon_variant	3/3	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Wiedemann-Steiner syndrome Pathogenic:1

Likely pathogenic, criteria provided, single submitter

research

Duke University Health System Sequencing Clinic, Duke University Health System

Apr 20, 2023

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Uncertain	0.092	D
BayesDel_noAF	Benign	-0.11
CADD	Pathogenic	32
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.45	.;T;.
Eigen	Pathogenic	0.73
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.97	D;D;D
M_CAP	Benign	0.041	D
MetaRNN	Uncertain	0.64	D;D;D
MetaSVM	Benign	-0.61	T
MutationAssessor	Uncertain	2.2	.;M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.87	D
PROVEAN	Uncertain	-3.9	D;D;.
REVEL	Uncertain	0.34
Sift	Uncertain	0.0020	D;D;.
Sift4G	Uncertain	0.0030	D;D;.
Polyphen		1.0	.;D;.
Vest4		0.79
MutPred		0.55		.;Loss of MoRF binding (P = 0.0021);.;
MVP		0.44
MPC		1.4
ClinPred		0.97	D
GERP RS		5.1
Varity_R		0.80
gMVP		0.90

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr11-118382717;