rs112620957

Variant names:

• chr12-49050796-AG-A
• rs112620957
• NM_003482.4:c.2798-7delC

Your query was ambiguous. Multiple possible variants found:

• chr12-49050796-AG-A
• chr12-49050796-AG-AGG

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP6_Very_Strong BS1 BS2

The NM_003482.4(KMT2D):​c.2798-7delC variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000612 in 1,594,394 control chromosomes in the GnomAD database, including 11 homozygotes. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0032 (4 hom., cov: 32)
  • Exomes 𝑓: 0.00034 (7 hom.)
• Consequence: KMT2D NM_003482.4 splice_region, intron
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:8
• Conservation: PhyloP100: -1.15
• 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: 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

ACMG classification

Our verdict: Benign. The variant received -16 ACMG points.

• BP6: Variant 12-49050796-AG-A is Benign according to our data. Variant chr12-49050796-AG-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 193865.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00317 (482/152270) while in subpopulation AFR AF = 0.0107 (445/41526). AF 95% confidence interval is 0.00989. There are 4 homozygotes in GnomAd4. There are 228 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High AC in GnomAd4 at 482 AD gene.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMT2D	NM_003482.4	MANE Select	c.2798-7delC		splice_region intron	N/A	NP_003473.3

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMT2D	ENST00000301067.12	TSL:5 MANE Select	c.2798-7delC		splice_region intron	N/A	ENSP00000301067.7
	KMT2D	ENST00000683543.2		c.2798-7delC		splice_region intron	N/A	ENSP00000506726.1
	KMT2D	ENST00000685166.1		c.2798-7delC		splice_region intron	N/A	ENSP00000509386.1

Frequencies

GnomAD3 genomes AF: 0.00315 AC: 480 AN: 152152 Hom.: 4 Cov.: 32

Gnomad AFR AF: 0.0107

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00177

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00239

GnomAD2 exomes AF: 0.000811 AC: 193 AN: 237966 AF XY: 0.000609

Gnomad AFR exome AF: 0.0110

Gnomad AMR exome AF: 0.000716

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000185

Gnomad OTH exome AF: 0.000176

GnomAD4 exome AF: 0.000342 AC: 493 AN: 1442124 Hom.: 7 Cov.: 35 AF XY: 0.000322 AC XY: 230 AN XY: 714818

African (AFR) AF: 0.0110 AC: 360 AN: 32656

American (AMR) AF: 0.000802 AC: 34 AN: 42414

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25260

East Asian (EAS) AF: 0.00 AC: 0 AN: 39278

South Asian (SAS) AF: 0.0000235 AC: 2 AN: 85160

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52978

Middle Eastern (MID) AF: 0.00141 AC: 8 AN: 5656

European-Non Finnish (NFE) AF: 0.0000327 AC: 36 AN: 1099392

Other (OTH) AF: 0.000893 AC: 53 AN: 59330

GnomAD4 genome AF: 0.00317 AC: 482 AN: 152270 Hom.: 4 Cov.: 32 AF XY: 0.00306 AC XY: 228 AN XY: 74452

African (AFR) AF: 0.0107 AC: 445 AN: 41526

American (AMR) AF: 0.00176 AC: 27 AN: 15302

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5176

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

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10628

Middle Eastern (MID) AF: 0.00680 AC: 2 AN: 294

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 68020

Other (OTH) AF: 0.00236 AC: 5 AN: 2116

Alfa AF: 0.00256 Hom.: 0

Bravo AF: 0.00361

Asia WGS AF: 0.00202 AC: 7 AN: 3478

ClinVar

ClinVar submissions as Germline

Significance: Benign/Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	3	not specified (3)
-	-	2	Kabuki syndrome (2)
-	-	2	not provided (2)
-	-	1	Kabuki syndrome 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-1.1
Mutation Taster		=100/0	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: rs112620957; hg19: chr12-49444579;