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COVID-19 research

Gene: CLDN9

Red List (low evidence)

CLDN9 (claudin 9)
EnsemblGeneIds (GRCh38): ENSG00000213937
EnsemblGeneIds (GRCh37): ENSG00000213937
OMIM: 615799, Gene2Phenotype
CLDN9 is in 2 panels

2 reviews

Alison Coffey (Illumina Clinical Services Laboratory, Illumina Inc.)

Red List (low evidence)

Evidence Summary from Illumina curation team: CLDN9 gene encodes for the Claudin-9 protein. The claudin family constitutes a large group of four- transmembrane domain proteins that are essential for the formation of tight junctions responsible for the control of paracellular transport. Studies have demonstrated that CLDN9 and CLDN6 mediate the entry of the hepatitis C virus (HCV) into both hepatic and non-hepatic cell lines (Zheng et al. 2007) however, HCV infection is not dependent on the presence of CLDN9 (Fofana et al. 2013).
Created: 28 May 2020, 3:12 p.m. | Last Modified: 28 May 2020, 3:12 p.m.
Panel Version: 0.347


Rebecca Foulger (Genomics England curator)

Identified through an OMIM search for potential viral susceptibility genes, and subsequently triaged/reviewed by Illumina curation team.
Created: 28 May 2020, 12:36 p.m. | Last Modified: 28 May 2020, 12:36 p.m.
Panel Version: 0.336


Mode of Inheritance
  • Expert list
  • OMIM
  • Expert Review Red
Clinvar variants
Variants in CLDN9
Panels with this gene

History Filter Activity

28 May 2020, Gel status: 1

Created, Added New Source, Set mode of inheritance

Rebecca Foulger (Genomics England curator)

gene: CLDN9 was added gene: CLDN9 was added to COVID-19 research. Sources: Expert Review Red,OMIM,Expert list Mode of inheritance for gene: CLDN9 was set to Unknown