chr12-49020739-C-A

Variant names:

• chr12-49020739-C-A
• rs563489548
• NM_003482.4:c.*1041G>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Moderate BP6_Moderate BS1 BS2

The NM_003482.4(KMT2D):​c.*1041G>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00135 in 210,296 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.0013 (0 hom., cov: 31)
  • Exomes 𝑓: 0.0014 (0 hom.)
• Consequence: KMT2D NM_003482.4 3_prime_UTR
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.167
• Publications: 1 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: G2P, Laboratory for Molecular Medicine, ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics
• 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

ENSG00000288710 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.36).
• BP6: Variant 12-49020739-C-A is Benign according to our data. Variant chr12-49020739-C-A is described in ClinVar as [Likely_benign]. Clinvar id is 2642931.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00132 (201/152092) while in subpopulation NFE AF = 0.00253 (172/67958). AF 95% confidence interval is 0.00222. There are 0 homozygotes in GnomAd4. There are 97 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.
• BS2: High AC in GnomAd4 at 201 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KMT2D	NM_003482.4	c.*1041G>T		3_prime_UTR_variant	Exon 55 of 55	ENST00000301067.12	NP_003473.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KMT2D	ENST00000301067.12	c.*1041G>T		3_prime_UTR_variant	Exon 55 of 55	5	NM_003482.4	ENSP00000301067.7
ENSG00000288710	ENST00000683988.1	n.*76+965G>T		intron_variant	Intron 5 of 15			ENSP00000506939.1

Frequencies

GnomAD3 genomes AF: 0.00132 AC: 201 AN: 151974 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000283

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00253

Gnomad OTH AF: 0.00192

GnomAD4 exome AF: 0.00143 AC: 83 AN: 58204 Hom.: 0 Cov.: 0 AF XY: 0.00169 AC XY: 46 AN XY: 27146

African (AFR) AF: 0.000824 AC: 2 AN: 2428

American (AMR) AF: 0.00118 AC: 2 AN: 1696

Ashkenazi Jewish (ASJ) AF: 0.000809 AC: 3 AN: 3710

East Asian (EAS) AF: 0.00 AC: 0 AN: 9094

South Asian (SAS) AF: 0.00 AC: 0 AN: 520

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 446

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 360

European-Non Finnish (NFE) AF: 0.00205 AC: 72 AN: 35202

Other (OTH) AF: 0.000842 AC: 4 AN: 4748

GnomAD4 genome AF: 0.00132 AC: 201 AN: 152092 Hom.: 0 Cov.: 31 AF XY: 0.00130 AC XY: 97 AN XY: 74366

African (AFR) AF: 0.000482 AC: 20 AN: 41518

American (AMR) AF: 0.000131 AC: 2 AN: 15242

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5162

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.000283 AC: 3 AN: 10600

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00253 AC: 172 AN: 67958

Other (OTH) AF: 0.00190 AC: 4 AN: 2108

Alfa AF: 0.00138 Hom.: 0

Bravo AF: 0.00134

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Dec 01, 2022

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

KMT2D: BS1 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.36
CADD	Benign	13
DANN	Benign	0.85
PhyloP100		0.17
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.1

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: rs563489548; hg19: chr12-49414522;