NM_004519.4(KCNQ3):c.1994C>T (p.Ser665Leu) AND Inborn genetic diseases

Germline classification:: Likely benign (1 submission)
Last evaluated:: Dec 15, 2017
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:: RCV002313035.9

Allele description [Variation Report for NM_004519.4(KCNQ3):c.1994C>T (p.Ser665Leu)]

NM_004519.4(KCNQ3):c.1994C>T (p.Ser665Leu)

Gene:

KCNQ3:potassium voltage-gated channel subfamily Q member 3 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

8q24.22

Genomic location:

Preferred name:

NM_004519.4(KCNQ3):c.1994C>T (p.Ser665Leu)

Other names:

p.S665L:TCG>TTG

HGVS:

NC_000008.11:g.132129887G>A
NG_008854.2:g.355871C>T
NM_001204824.2:c.1634C>T
NM_004519.4:c.1994C>TMANE SELECT
NP_001191753.1:p.Ser545Leu
NP_004510.1:p.Ser665Leu
NC_000008.10:g.133142134G>A
NM_004519.2:c.1994C>T
NM_004519.3:c.1994C>T

Protein change:

S545L

Links:

dbSNP: rs147173555

Molecular consequence:

NM_001204824.2:c.1634C>T - missense variant - [Sequence Ontology: SO:0001583]
NM_004519.4:c.1994C>T - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Inborn genetic diseases
Identifiers:: MeSH: D030342; MedGen: C0950123

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000847519	Ambry Genetics	criteria provided, single submitter (Ambry Variant Classification Scheme 2023)	Likely benign (Dec 15, 2017)	germline	clinical testing	Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000847519

Ambry Genetics

criteria provided, single submitter

(Ambry Variant Classification Scheme 2023)

Likely benign
(Dec 15, 2017)

germline

clinical testing

Citation Link

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

Details of each submission

From Ambry Genetics, SCV000847519.4

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

Description

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.

#	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: Jun 20, 2026

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