12-48681560-G-A

Position:

• chr12-48681560-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_017822.4(KANSL2):​c.73C>T​(p.Pro25Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000479 in 1,461,712 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: KANSL2 NM_017822.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.13

Genes affected

KANSL2 (HGNC:26024): (KAT8 regulatory NSL complex subunit 2) Involved in histone H4-K16 acetylation; histone H4-K5 acetylation; and histone H4-K8 acetylation. Located in several cellular components, including actin cytoskeleton; cytosol; and nucleoplasm. Part of histone acetyltransferase complex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17849684).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KANSL2	NM_017822.4	c.73C>T	p.Pro25Ser	missense_variant	2/10	ENST00000420613.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KANSL2	ENST00000420613.7	c.73C>T	p.Pro25Ser	missense_variant	2/10	1	NM_017822.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000479 AC: 7 AN: 1461712 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727138

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000540

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000329 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 27, 2022

The c.73C>T (p.P25S) alteration is located in exon 2 (coding exon 1) of the KANSL2 gene. This alteration results from a C to T substitution at nucleotide position 73, causing the proline (P) at amino acid position 25 to be replaced by a serine (S). 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	0.074
BayesDel_addAF	Benign	-0.088	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	22
DANN	Uncertain	0.99
Eigen	Benign	0.078
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.88	D;D;D;D;D
M_CAP	Benign	0.028	D
MetaRNN	Benign	0.18	T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	0.99	D;D;D;D
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-0.60	N;N;N;N;N
REVEL	Benign	0.084
Sift	Benign	0.064	T;T;T;T;T
Sift4G	Benign	0.074	T;T;T;T;.
Polyphen		0.77	P;B;.;.;.
Vest4		0.14
MutPred		0.17		Loss of glycosylation at P208 (P = 0.0792);.;.;.;.;
MVP		0.30
MPC		0.38
ClinPred		0.76	D
GERP RS		5.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.046
gMVP		0.34

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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

Other links and lift over

dbSNP: rs746578917; hg19: chr12-49075343; COSMIC: COSV63480376; COSMIC: COSV63480376;