chr11-68171022-A-C

Variant names:

• chr11-68171022-A-C
• rs1555027828
• NM_017635.5:c.970T>G

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM2 PM5 PP3_Strong PP5_Moderate

The NM_017635.5(KMT5B):​c.970T>G​(p.Cys324Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/20 in silico tools predict a damaging outcome for this variant. 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. C324W) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KMT5B NM_017635.5 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.32
• Publications: 0 publications found

Genes affected

KMT5B (HGNC:24283): (lysine methyltransferase 5B) This gene encodes a protein that contains a SET domain. SET domains appear to be protein-protein interaction domains that mediate interactions with a family of proteins that display similarity with dual-specificity phosphatases (dsPTPases). The function of this gene has not been determined. Several alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2014]

KMT5B Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• intellectual disability, autosomal dominant 51

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Illumina, G2P

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr11-68171020-G-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 1801371.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.975
• PP5: Variant 11-68171022-A-C is Pathogenic according to our data. Variant chr11-68171022-A-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 521217.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_017635.5. 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
	KMT5B	NM_017635.5	MANE Select	c.970T>G	p.Cys324Gly	missense	Exon 9 of 11	NP_060105.3
	KMT5B	NM_001369426.1		c.970T>G	p.Cys324Gly	missense	Exon 9 of 11	NP_001356355.1
	KMT5B	NM_001300907.1		c.454T>G	p.Cys152Gly	missense	Exon 10 of 12	NP_001287836.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMT5B	ENST00000304363.9	TSL:5 MANE Select	c.970T>G	p.Cys324Gly	missense	Exon 9 of 11	ENSP00000305899.4
	KMT5B	ENST00000615954.4	TSL:1	c.970T>G	p.Cys324Gly	missense	Exon 8 of 10	ENSP00000484858.1
	KMT5B	ENST00000401547.6	TSL:1	c.970T>G	p.Cys324Gly	missense	Exon 9 of 10	ENSP00000385965.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Pathogenic:1

Sep 06, 2016

Ambry Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.49	D
BayesDel_noAF	Pathogenic	0.47
CADD	Pathogenic	28
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.50	D
Eigen	Pathogenic	0.85
Eigen_PC	Pathogenic	0.81
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.97	D
M_CAP	Pathogenic	0.50	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	0.98	D
PhyloP100		9.3
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-11	D
REVEL	Pathogenic	0.93
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.87
MutPred		0.89		Gain of disorder (P = 0.0334)
MVP		0.75
MPC		2.8
ClinPred		1.0	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.99
Mutation Taster		=4/96	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1555027828; hg19: chr11-67938489;