VCV002007816.6 - ClinVar

NM_002250.3(KCNN4):c.1018C>A (p.His340Asn)

Germline

Classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

(4)

Stars represent the aggregate review status, or the level of review supporting the aggregate germline classification for this VCV record. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status. The number of submissions which contribute to this review status is shown in parentheses.

Conflicting classifications of pathogenicity
Uncertain significance(2); Likely benign(1)

criteria provided, conflicting classifications

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_002250.3(KCNN4):c.1018C>A (p.His340Asn)

Variation ID: 2007816 Accession: VCV002007816.6

Type and length

single nucleotide variant, 1 bp

Location

Cytogenetic: 19q13.31 19: 43769473 (GRCh38) [ NCBI UCSC ] 19: 44273625 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Feb 8, 2023	Oct 8, 2024	Nov 14, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NM_002250.3:c.1018C>A MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_002241.1:p.His340Asn	missense
NM_002250.2:c.1018C>A
NC_000019.10:g.43769473G>T
NC_000019.9:g.44273625G>T
NG_052672.1:g.17667C>A
LRG_1305:g.17667C>A
LRG_1305t1:c.1018C>A	LRG_1305p1:p.His340Asn

... more HGVS ... less HGVS

Protein change

H340N

Other names

p.His340Asn

Canonical SPDI

NC_000019.10:43769472:G:T

Functional consequence Help The effect of the variant on RNA or protein function, based on experimental evidence from submitters.

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

Links

VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
KCNN4		-	-	GRCh38 GRCh37	89	102

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
not provided	Conflicting interpretations of pathogenicity (3)	criteria provided, conflicting classifications	Nov 14, 2023	RCV002833392.5
KCNN4-related disorder	Likely benign (1)	no assertion criteria provided	Nov 11, 2021	RCV003916543.2

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	More information Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Uncertain significance (Mar 13, 2023)	criteria provided, single submitter (GeneDx Variant Classification Process June 2021) Method: clinical testing	Not Provided Affected status: yes Allele origin: germline	GeneDx Accession: SCV004035761.1 First in ClinVar: Sep 23, 2023 Last updated: Sep 23, 2023	Comment: Reported in two probands with clinical suspicion of hereditary erythrocyte defects, but parental segregation information was not provided and both individuals were reported to have … (more) Reported in two probands with clinical suspicion of hereditary erythrocyte defects, but parental segregation information was not provided and both individuals were reported to have potentially causative variants in other genes as well (Andolfo et al., 2021); Reported in an individual with transient anemia in infancy, but the variant was inherited from an asymptomatic mother (Allegrini et al., 2022); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 34201899, 36003639) (less)
Uncertain significance (Jun 02, 2023)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Not provided Affected status: unknown Allele origin: germline	Mayo Clinic Laboratories, Mayo Clinic Accession: SCV004225405.1 First in ClinVar: Jan 06, 2024 Last updated: Jan 06, 2024	Publications: PubMed (3) PubMed: 34201899‚ 36003639‚ 36864026 Comment: PP3, PS3 Number of individuals with the variant: 3
Likely benign (Nov 14, 2023)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	not provided Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV003212110.2 First in ClinVar: Feb 07, 2023 Last updated: Feb 20, 2024
Likely benign (Nov 11, 2021)	no assertion criteria provided Method: clinical testing	KCNN4-related condition Affected status: unknown Allele origin: germline	PreventionGenetics, part of Exact Sciences Accession: SCV004732476.2 First in ClinVar: Mar 16, 2024 Last updated: Oct 08, 2024	Comment: This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications).

Comment:

Reported in two probands with clinical suspicion of hereditary erythrocyte defects, but parental segregation information was not provided and both individuals were reported to have potentially causative variants in other genes as well (Andolfo et al., 2021); Reported in an individual with transient anemia in infancy, but the variant was inherited from an asymptomatic mother (Allegrini et al., 2022); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 34201899, 36003639)

Germline Functional Evidence

There is no functional evidence in ClinVar for this variation. If you have generated functional data for this variation, please consider submitting that data to ClinVar.

Comment:

Citations for germline classification of this variant

Title	Author	Journal	Year	Link
Variant spectrum of PIEZO1 and KCNN4 in Japanese patients with dehydrated hereditary stomatocytosis.	Nakahara E	Human genome variation	2023	PMID: 36864026
New KCNN4 Variants Associated With Anemia: Stomatocytosis Without Erythrocyte Dehydration.	Allegrini B	Frontiers in physiology	2022	PMID: 36003639
Complex Modes of Inheritance in Hereditary Red Blood Cell Disorders: A Case Series Study of 155 Patients.	Andolfo I	Genes	2021	PMID: 34201899

Text-mined citations for this variant ...

Record last updated Oct 13, 2024

ClinVar Genomic variation as it relates to human health

NM_002250.3(KCNN4):c.1018C>A (p.His340Asn)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...