chr11-118436566-C-A

Variant names:

• chr11-118436566-C-A
• rs1367152331
• NM_001197104.2:c.54C>A

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001197104.2(KMT2A):​c.54C>A​(p.Gly18Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000984 in 1,015,864 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G18G) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 9.8e-7 (0 hom.)
• Consequence: KMT2A NM_001197104.2 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.26
• 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_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.66).
• BP7: Synonymous conserved (PhyloP=1.26 with no splicing effect.

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.54C>A	p.Gly18Gly	synonymous	Exon 1 of 36	NP_001184033.1	Q03164-3
	KMT2A	NM_001412597.1		c.54C>A	p.Gly18Gly	synonymous	Exon 1 of 37	NP_001399526.1	A0AA34QVI8
	KMT2A	NM_005933.4		c.54C>A	p.Gly18Gly	synonymous	Exon 1 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.54C>A	p.Gly18Gly	synonymous	Exon 1 of 36	ENSP00000436786.2	Q03164-3
	KMT2A	ENST00000389506.10	TSL:1	c.54C>A	p.Gly18Gly	synonymous	Exon 1 of 36	ENSP00000374157.5	Q03164-1
	ENSG00000285827	ENST00000648261.1		c.-798-32209C>A		intron	N/A	ENSP00000498126.1	A0A3B3ITZ1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 9.84e-7 AC: 1 AN: 1015864 Hom.: 0 Cov.: 20 AF XY: 0.00 AC XY: 0 AN XY: 480276

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 21210

American (AMR) AF: 0.00 AC: 0 AN: 7320

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 12112

East Asian (EAS) AF: 0.00 AC: 0 AN: 23382

South Asian (SAS) AF: 0.00 AC: 0 AN: 19048

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 28638

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3152

European-Non Finnish (NFE) AF: 0.00000116 AC: 1 AN: 861618

Other (OTH) AF: 0.00 AC: 0 AN: 39384

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.66
CADD	Benign	12
DANN	Benign	0.96
PhyloP100		1.3
PromoterAI		-0.014	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.6

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: rs1367152331; hg19: chr11-118307281;