Genetic Variant KAT2A:p.Lys828Arg (chr17-42113680-T-C) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_021078.3(KAT2A):c.2483A>G(p.Lys828Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000124 in 1,611,516 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

KAT2A
NM_021078.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.02

Variant links:

Genes affected

KAT2A (HGNC:4201): (lysine acetyltransferase 2A) KAT2A, or GCN5, is a histone acetyltransferase (HAT) that functions primarily as a transcriptional activator. It also functions as a repressor of NF-kappa-B (see MIM 164011) by promoting ubiquitination of the NF-kappa-B subunit RELA (MIM 164014) in a HAT-independent manner (Mao et al., 2009 [PubMed 19339690]).[supplied by OMIM, Sep 2009]

KAT2A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS2

High AC in GnomAdExome4 at 17 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KAT2A	NM_021078.3 link	c.2483A>G	p.Lys828Arg	missense_variant	Exon 18 of 18	ENST00000225916.10	NP_066564.2	Q92830-1
KAT2A	NM_001376227.1 link	c.2486A>G	p.Lys829Arg	missense_variant	Exon 18 of 18		NP_001363156.1
KAT2A	XM_006721818.5 link	c.1403A>G	p.Lys468Arg	missense_variant	Exon 13 of 13		XP_006721881.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
KAT2A	ENST00000225916.10 link	c.2483A>G	p.Lys828Arg	missense_variant	Exon 18 of 18	1	NM_021078.3	ENSP00000225916.5	Q92830-1
KAT2A	ENST00000465682.5 link	n.*1597A>G		non_coding_transcript_exon_variant	Exon 18 of 18	5		ENSP00000468390.1	K7ERS6
KAT2A	ENST00000586972.1 link	n.562A>G		non_coding_transcript_exon_variant	Exon 2 of 2	2
KAT2A	ENST00000465682.5 link	n.*1597A>G		3_prime_UTR_variant	Exon 18 of 18	5		ENSP00000468390.1	K7ERS6

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000385

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000162

AC:

AN:

246862

Hom.:

AF XY:

0.0000298

AC XY:

AN XY:

134082

show subpopulations

Gnomad AFR exome

AF:

0.0000640

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000554

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000897

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.0000117

AC:

AN:

1459166

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

726028

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.000115

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000117

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152350

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74504

show subpopulations

Gnomad4 AFR

AF:

0.0000240

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000386

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000513

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 01, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2483A>G (p.K828R) alteration is located in exon 18 (coding exon 18) of the KAT2A gene. This alteration results from a A to G substitution at nucleotide position 2483, causing the lysine (K) at amino acid position 828 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.084

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.31

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.34

Eigen

Uncertain

0.40

Eigen_PC

Uncertain

0.47

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.93

M_CAP

Benign

0.021

MetaRNN

Uncertain

0.55

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.7

PrimateAI

Uncertain

0.77

PROVEAN

Benign

-1.9

REVEL

Benign

0.25

Sift

Benign

0.17

Sift4G

Benign

0.23

Polyphen

0.89

Vest4

0.64

MVP

0.39

MPC

1.9

ClinPred

0.42

GERP RS

5.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Varity_R

0.80

gMVP

0.59

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over