| pubmed-article:10211837 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:10211837 | lifeskim:mentions | umls-concept:C0069141 | lld:lifeskim |
| pubmed-article:10211837 | lifeskim:mentions | umls-concept:C0243041 | lld:lifeskim |
| pubmed-article:10211837 | lifeskim:mentions | umls-concept:C1149552 | lld:lifeskim |
| pubmed-article:10211837 | pubmed:issue | 4 | lld:pubmed |
| pubmed-article:10211837 | pubmed:dateCreated | 1999-7-14 | lld:pubmed |
| pubmed-article:10211837 | pubmed:abstractText | Protein B23 is an abundant, multifunctional nucleolar phosphoprotein whose activities are proposed to play a role in ribosome assembly. Szebeni et al. (1997) showed stimulation of nuclear import in vitro by protein B23 and suggested that this effect was due to a molecular chaperone-like activity. Protein B23 was tested for chaperone activities using several protein substrates. The temperature-dependent and -independent aggregation of the HIV-1 Rev protein was measured using a zero angle light scattering (turbidity) assay. Protein B23 inhibited the aggregation of the Rev protein, with the amount of inhibition proportional to the concentration of B23 added. This activity was saturable with nearly complete inhibition when the molar ratio of B23:Rev was slightly above one. Protein B23 also protected liver alcohol dehydrogenase (LADH), carboxypeptidase A, citrate synthase, and rhodanese from aggregation during thermal denaturation and preserved the enzyme activity of LADH under these conditions. In addition, protein B23 was able to promote the restoration of activity of LADH previously denatured with guanidine-HCl. Protein B23 preferentially bound denatured substrates and exposed hydrophobic regions when complexed with denatured proteins. Thus, by several criteria, protein B23 behaves like a molecular chaperone; these activities may be related to its role in ribosome biogenesis. | lld:pubmed |
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| pubmed-article:10211837 | pubmed:language | eng | lld:pubmed |
| pubmed-article:10211837 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:10211837 | pubmed:citationSubset | IM | lld:pubmed |
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| pubmed-article:10211837 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:10211837 | pubmed:month | Apr | lld:pubmed |
| pubmed-article:10211837 | pubmed:issn | 0961-8368 | lld:pubmed |
| pubmed-article:10211837 | pubmed:author | pubmed-author:OlsonM OMO | lld:pubmed |
| pubmed-article:10211837 | pubmed:author | pubmed-author:SzebeniAA | lld:pubmed |
| pubmed-article:10211837 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:10211837 | pubmed:volume | 8 | lld:pubmed |
| pubmed-article:10211837 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:10211837 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:10211837 | pubmed:pagination | 905-12 | lld:pubmed |
| pubmed-article:10211837 | pubmed:dateRevised | 2009-11-18 | lld:pubmed |
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| pubmed-article:10211837 | pubmed:year | 1999 | lld:pubmed |
| pubmed-article:10211837 | pubmed:articleTitle | Nucleolar protein B23 has molecular chaperone activities. | lld:pubmed |
| pubmed-article:10211837 | pubmed:affiliation | Department of Biochemistry, University of Mississippi Medical Center, Jackson 39216-4505, USA. | lld:pubmed |
| pubmed-article:10211837 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:10211837 | pubmed:publicationType | Research Support, U.S. Gov't, P.H.S. | lld:pubmed |
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