NM_172056.2(KCNH2):c.1883del (p.Gly628fs) AND not provided

Clinical significance:Pathogenic (Last evaluated: Jul 7, 2015)

Review status:1 star out of maximum of 4 stars

criteria provided, single submitter

Based on:
1 submission [Details]
Record status:

Allele description [Variation Report for NM_172056.2(KCNH2):c.1883del (p.Gly628fs)]

NM_172056.2(KCNH2):c.1883del (p.Gly628fs)

KCNH2:potassium voltage-gated channel subfamily H member 2 [Gene - OMIM - HGNC]
Variant type:
Cytogenetic location:
Genomic location:
Preferred name:
NM_172056.2(KCNH2):c.1883del (p.Gly628fs)
  • NC_000007.14:g.150951511del
  • NG_008916.1:g.31417del
  • NM_000238.3:c.1883del
  • NM_001204798.2:c.863del
  • NM_172056.2:c.1883del
  • NM_172057.2:c.863del
  • NP_000229.1:p.Gly628fs
  • NP_001191727.1:p.Gly288fs
  • NP_742053.1:p.Gly628fs
  • NP_742054.1:p.Gly288fs
  • LRG_288t1:c.1883del
  • LRG_288t2:c.1883del
  • LRG_288t3:c.863del
  • LRG_288:g.31417del
  • LRG_288p1:p.Gly628fs
  • LRG_288p2:p.Gly628fs
  • LRG_288p3:p.Gly288fs
  • NC_000007.13:g.150648599del
  • NM_000238.2:c.1883delG
Protein change:
dbSNP: rs1064793855
NCBI 1000 Genomes Browser:
Molecular consequence:
  • NM_000238.3:c.1883del - frameshift variant - [Sequence Ontology: SO:0001589]
  • NM_001204798.2:c.863del - frameshift variant - [Sequence Ontology: SO:0001589]
  • NM_172056.2:c.1883del - frameshift variant - [Sequence Ontology: SO:0001589]
  • NM_172057.2:c.863del - frameshift variant - [Sequence Ontology: SO:0001589]


MedGen: CN517202

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Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
SCV000567187GeneDxcriteria provided, single submitter
(Jul 7, 2015)
germlineclinical testing

Citation Link

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineyesnot providednot providednot providednot providednot providedclinical testing

Details of each submission

From GeneDx, SCV000567187.3

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testingnot provided


Although the c.1883delG deletion in the KCNH2 gene has not been reported to our knowledge, thisvariant causes a shift in reading frame starting at codon Glycine 628, changing it to an Alanine, andcreating a premature stop codon at position 86 of the new reading frame, denoted p.Gly628AlafsX86. Thisdeletion is expected to result in either an abnormal, truncated protein product or loss of protein from thisallele through nonsense-mediated mRNA decay. Other frameshift variants in the KCNH2 gene havebeen reported in HGMD in association with LQTS (Stenson P et al., 2014). Furthermore, the c.1883delGvariant was not observed in approximately 6,500 individuals of European and African American ancestryin the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations.In summary, c.1883delG in the KCNH2 gene is interpreted as a pathogenic variant.

OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineyesnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 10, 2019

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