C7, a novel nucleolar protein, is the mouse homologue of the Drosophila late puff product L82 and an isoform of human OXR1.
The C7 gene was identified in a project aimed to characterize differential gene expression upon attachment of cells to extracellular matrix proteins in vitro. C7 is the homologue of Drosophila L82, a late puff gene (Stowers et al. (1999) Dev. Biol. 213, 116-130) and human OXR1, a gene, which protects cells against oxidation (Volkert et al. (2000) Proc. Natl. Acad. Sci. USA 97, 14530-14535). All are transcribed into multiple splice forms with a common 3' domain. Additional members of this novel gene family are found in a number of eukaryotic species. In the mouse, the C7 gene is highly and broadly expressed during development in at least 4 splice forms, 3 of which were sequenced. In the adult, the C7 gene is most highly expressed in brain and testis. Antibodies to recombinant C7 protein localized to nucleoli in a variety of cell types, suggesting that C7 may be involved in the formation or function of this important organelle.
Fischer
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H
Department of Molecular Medicine, Karolinska Institute, Stockholm, 171 76, Sweden.
Zhang
X U
XU
O'Brien
K P
KP
Kylsten
P
P
Engvall
E
E
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002448:Cell Adhesion; D003001:Cloning, Molecular; D018076:DNA, Complementary; D004330:Drosophila / Q000235:genetics; D018507:Gene Expression Regulation, Developmental; D017404:In Situ Hybridization, Fluorescence; D051379:Mice; D024101:Mitochondrial Proteins; D008969:Molecular Sequence Data; D009687:Nuclear Proteins / Q000737:chemistry / Q000235:genetics* / Q000502:physiology; D016133:Polymerase Chain Reaction; D011506:Proteins / Q000737:chemistry / Q000235:genetics*; D051381:Rats; D017386:Sequence Homology, Amino Acid
D018076:DNA, Complementary; D024101:Mitochondrial Proteins; D009687:Nuclear Proteins; C419777:OXR1 protein, human; C423572:Oxr1 protein, mouse; D011506:Proteins