chr17-46171482-G-C

Variant names:

• chr17-46171482-G-C
• rs17662853
• NM_015443.4:c.662C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_015443.4(KANSL1):​c.662C>G​(p.Thr221Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T221I) has been classified as Benign.

• Frequency: Genomes: not found (cov: 35)
• Consequence: KANSL1 NM_015443.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.54
• Publications: 35 publications found

Genes affected

KANSL1 (HGNC:24565): (KAT8 regulatory NSL complex subunit 1) This gene encodes a nuclear protein that is a subunit of two protein complexes involved with histone acetylation, the MLL1 complex and the NSL1 complex. The encoded protein has been implicated in a variety of cellular processes including enhancer regulation, cell proliferation, and mitosis. Mutations in this gene are associated with Koolen-de Vries Syndrome. [provided by RefSeq, May 2022]

KANSL1 Gene-Disease associations (from GenCC):

• Koolen-de Vries syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen, G2P
• Koolen-de Vries syndrome due to a point mutation

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.08852884).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015443.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KANSL1	NM_015443.4	MANE Select	c.662C>G	p.Thr221Ser	missense	Exon 2 of 15	NP_056258.1	Q7Z3B3-1
	KANSL1	NM_001193466.2		c.662C>G	p.Thr221Ser	missense	Exon 2 of 15	NP_001180395.1	Q7Z3B3-1
	KANSL1	NM_001379198.1		c.662C>G	p.Thr221Ser	missense	Exon 3 of 16	NP_001366127.1	Q7Z3B3-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KANSL1	ENST00000432791.7	TSL:1 MANE Select	c.662C>G	p.Thr221Ser	missense	Exon 2 of 15	ENSP00000387393.3	Q7Z3B3-1
	KANSL1	ENST00000262419.10	TSL:1	c.662C>G	p.Thr221Ser	missense	Exon 2 of 15	ENSP00000262419.6	Q7Z3B3-1
	KANSL1	ENST00000918919.1		c.662C>G	p.Thr221Ser	missense	Exon 2 of 16	ENSP00000588978.1

Frequencies

GnomAD3 genomes Cov.: 35

GnomAD4 exome Cov.: 50

GnomAD4 genome Cov.: 35

Alfa AF: 0.00 Hom.: 2967

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.077
BayesDel_addAF	Benign	-0.30	T
BayesDel_noAF	Benign	-0.67
CADD	Benign	17
DANN	Benign	0.56
Eigen	Benign	-0.57
Eigen_PC	Benign	-0.41
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.54	T
M_CAP	Benign	0.0092	T
MetaRNN	Benign	0.089	T
MetaSVM	Benign	-0.99	T
PhyloP100		4.5
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-0.25	N
REVEL	Benign	0.066
Sift	Benign	0.37	T
Sift4G	Benign	0.50	T
Vest4		0.077
MutPred		0.12		Loss of sheet (P = 0.0181)
MVP		0.093
MPC		0.019
ClinPred		0.15	T
GERP RS		3.3
PromoterAI		-0.0028	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.14
Mutation Taster		=96/4	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: rs17662853; hg19: chr17-44248848;