RGD Reference Report - A homozygous mutation in a novel zinc-finger protein, ERIS, is responsible for Wolfram syndrome 2. - Rat Genome Database

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A homozygous mutation in a novel zinc-finger protein, ERIS, is responsible for Wolfram syndrome 2.

Authors: Amr, S  Heisey, C  Zhang, M  Xia, XJ  Shows, KH  Ajlouni, K  Pandya, A  Satin, LS  El-Shanti, H  Shiang, R 
Citation: Amr S, etal., Am J Hum Genet. 2007 Oct;81(4):673-83. Epub 2007 Aug 20.
RGD ID: 10045603
Pubmed: PMID:17846994   (View Abstract at PubMed)
PMCID: PMC2227919   (View Article at PubMed Central)
DOI: DOI:10.1086/520961   (Journal Full-text)

A single missense mutation was identified in a novel, highly conserved zinc-finger gene, ZCD2, in three consanguineous families of Jordanian descent with Wolfram syndrome (WFS). It had been shown that these families did not have mutations in the WFS1 gene (WFS1) but were mapped to the WFS2 locus at 4q22-25. A G-->C transversion at nucleotide 109 predicts an amino acid change from glutamic acid to glutamine (E37Q). Although the amino acid is conserved and the mutation is nonsynonymous, the pathogenesis for the disorder is because the mutation also causes aberrant splicing. The mutation was found to disrupt messenger RNA splicing by eliminating exon 2, and it results in the introduction of a premature stop codon. Mutations in WFS1 have also been found to cause low-frequency nonsyndromic hearing loss, progressive hearing loss, and isolated optic atrophy associated with hearing loss. Screening of 377 probands with hearing loss did not identify mutations in the WFS2 gene. The WFS1-encoded protein, Wolframin, is known to localize to the endoplasmic reticulum and plays a role in calcium homeostasis. The ZCD2-encoded protein, ERIS (endoplasmic reticulum intermembrane small protein), is also shown to localize to the endoplasmic reticulum but does not interact directly with Wolframin. Lymphoblastoid cells from affected individuals show a significantly greater rise in intracellular calcium when stimulated with thapsigargin, compared with controls, although no difference was observed in resting concentrations of intracellular calcium.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
Wolfram syndrome 2  IAGP 10045603DNA:missense mutation: :109G>C (p.E37Q) (human)RGD 
Wolfram syndrome 2  ISOCISD2 (Homo sapiens)10045603; 10045603DNA:missense mutation: :109G>C (p.E37Q) (human)RGD 

Objects Annotated

Genes (Rattus norvegicus)
Cisd2  (CDGSH iron sulfur domain 2)

Genes (Mus musculus)
Cisd2  (CDGSH iron sulfur domain 2)

Genes (Homo sapiens)
CISD2  (CDGSH iron sulfur domain 2)


Additional Information