rs1555194803

Variant names:

• chr12-49045937-A-G
• rs1555194803
• NM_003482.4:c.4724T>C

Your query was ambiguous. Multiple possible variants found:

• chr12-49045937-A-G
• chr12-49045937-A-T

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP6

The NM_003482.4(KMT2D):​c.4724T>C​(p.Met1575Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,640 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M1575L) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: KMT2D NM_003482.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 5.69
• Publications: 0 publications found

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]

KMT2D Gene-Disease associations (from GenCC):

• choanal atresia-athelia-hypothyroidism-delayed puberty-short stature syndrome

  Inheritance: AD Classification: DEFINITIVE, MODERATE Submitted by: Illumina, G2P
• Kabuki syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics, Laboratory for Molecular Medicine, ClinGen
• branchial arch abnormalities, choanal atresia, athelia, hearing loss, and hypothyroidism syndrome

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Kabuki syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.13455433).
• BP6: Variant 12-49045937-A-G is Benign according to our data. Variant chr12-49045937-A-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 547424.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003482.4. 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
	KMT2D	NM_003482.4	MANE Select	c.4724T>C	p.Met1575Thr	missense	Exon 19 of 55	NP_003473.3	O14686-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMT2D	ENST00000301067.12	TSL:5 MANE Select	c.4724T>C	p.Met1575Thr	missense	Exon 19 of 55	ENSP00000301067.7	O14686-1
	KMT2D	ENST00000683543.2		c.4724T>C	p.Met1575Thr	missense	Exon 19 of 56	ENSP00000506726.1	A0A804HHR9
	KMT2D	ENST00000685166.1		c.4724T>C	p.Met1575Thr	missense	Exon 18 of 54	ENSP00000509386.1	O14686-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461640 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727106

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.0000671 AC: 3 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53402

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111816

Other (OTH) AF: 0.00 AC: 0 AN: 60370

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	-	Kabuki syndrome (1)
-	-	1	Kabuki syndrome 1 (1)
-	1	-	KMT2D-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.052	T
BayesDel_noAF	Benign	-0.31
CADD	Benign	21
DANN	Benign	0.91
DEOGEN2	Benign	0.039	T
Eigen	Benign	-0.18
Eigen_PC	Benign	0.085
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.48	T
M_CAP	Uncertain	0.18	D
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-0.79	T
MutationAssessor	Benign	-1.3	N
PhyloP100		5.7
PrimateAI	Benign	0.41	T
PROVEAN	Benign	0.78	N
REVEL	Uncertain	0.32
Sift	Benign	0.62	T
Polyphen		0.039	B
Vest4		0.38
MutPred		0.31		Gain of glycosylation at M1575 (P = 0.0044)
MVP		0.36
MPC		0.78
ClinPred		0.41	T
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.10
gMVP		0.43
Mutation Taster		=81/19	polymorphism

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: rs1555194803; hg19: chr12-49439720;