NM_015443.4(KANSL1):c.623G>A (p.Cys208Tyr) AND Koolen-de Vries syndrome

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Sep 17, 2021
Review status:: 1 star out of maximum of 4 stars
criteria provided, single submitter

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV001996602.5

Allele description [Variation Report for NM_015443.4(KANSL1):c.623G>A (p.Cys208Tyr)]

NM_015443.4(KANSL1):c.623G>A (p.Cys208Tyr)

Gene:

KANSL1:KAT8 regulatory NSL complex subunit 1 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

17q21.31

Genomic location:

Preferred name:

NM_015443.4(KANSL1):c.623G>A (p.Cys208Tyr)

HGVS:

NC_000017.11:g.46171521C>T
NG_032784.1:g.58854G>A
NM_001193465.2:c.623G>A
NM_001193466.2:c.623G>A
NM_001379198.1:c.623G>A
NM_015443.4:c.623G>AMANE SELECT
NP_001180394.1:p.Cys208Tyr
NP_001180395.1:p.Cys208Tyr
NP_001366127.1:p.Cys208Tyr
NP_056258.1:p.Cys208Tyr
NC_000017.10:g.44248887C>T

Protein change:

C208Y

Links:

dbSNP: rs762448559

NCBI 1000 Genomes Browser:

rs762448559

Molecular consequence:

NM_001193465.2:c.623G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001193466.2:c.623G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001379198.1:c.623G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_015443.4:c.623G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Koolen-de Vries syndrome (KDVS)
Synonyms:: KANSL1-Related Intellectual Disability Syndrome
Identifiers:: MONDO: MONDO:0012496; MedGen: C1864871; Orphanet: 96169; OMIM: 610443

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4930473A02Rik RIKEN cDNA 4930473A02 gene [Mus musculus]
4930473A02Rik RIKEN cDNA 4930473A02 gene [Mus musculus]
Gene ID:321014

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV002218919	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Sep 17, 2021)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV002218919

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Sep 17, 2021)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV002218919.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

Due to the possible presence of a polymorphic segmental duplication, the location of the variant could not be unambiguously resolved. Variants with ambiguous mapping are still reported relative to the KANSL1 transcript. This sequence change replaces cysteine with tyrosine at codon 208 of the KANSL1 protein (p.Cys208Tyr). The cysteine residue is highly conserved and there is a large physicochemical difference between cysteine and tyrosine. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the ExAC database. This variant has not been reported in the literature in individuals with KANSL1-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). Until the location of this sequence change can be resolved, the clinical significance of this variant remains uncertain. It has been classified as a Variant of Uncertain Significance.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Sep 29, 2024

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