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PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1995-12-18
pubmed:databankReference
pubmed:abstractText
The monoclonal antibody G1C7, recognises both Xenopus nucleolin and a protein of 180 kDa present in Xenopus oocyte nucleoli. This antibody was used to obtain a cDNA clone encoding the 180 kDa protein now called xNopp180 (Xenopus nucleolar phosphoprotein of 180 kDa). Analysis of the deduced amino acid sequence from this cDNA shows that xNopp180 is almost entirely composed of alternating acidic and basic domains. We show that xNopp180 is heavily phosphorylated and that it contains multiple consensus sites for phosphorylation by casein kinase II and cdc2 kinase. In addition we show that xNopp180 is the 180 kDa antigen recognised by the monoclonal antibody No-114, thus allowing reinterpretation of previous work with this antibody. xNopp180 appears to be the Xenopus homolog of the rat nucleolar protein Nopp140. Nopp140 is a nuclear localisation signal binding protein that shuttles on curvilinear tracks between the nucleolus and the cytoplasm. Possible roles for xNopp180/Nopp140 in ribosome biogenesis are discussed.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0021-9533
pubmed:author
pubmed:issnType
Print
pubmed:volume
108 ( Pt 10)
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3339-47
pubmed:dateRevised
2009-9-29
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Identification and cDNA cloning of a Xenopus nucleolar phosphoprotein, xNopp180, that is the homolog of the rat nucleolar protein Nopp140.
pubmed:affiliation
Biomedical Research Centre, University of Dundee, Ninewells Hospital, Scotland.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't