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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
2
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pubmed:dateCreated |
1998-11-12
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pubmed:abstractText |
We have determined a crude structure of the apo form of bovine beta-lactoglobulin, a protein of 162 amino acid residues with a molecular mass of 18 kDa, at a low pH on the basis of data collected using only homonuclear 1H NMR spectroscopy. An ensemble of protein conformations was calculated with the distance-geometry algorithm for NMR applications (DYANA). The monomeric protein at low pH adopts a beta-barrel fold, well-superimposable on the structure determined by X-ray crystallography for the dimer at physiological pH. NMR evidence suggests the presence of disordered loop regions and terminal segments. Structural differences between the monomer at pH 2 and the dimer at pH 7, obtained by X-ray crystallography, are discussed, paying particular attention to surface electrostatic properties, in view of the high charge state of the protein at low pH.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Oct
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pubmed:issn |
0014-5793
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
2
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pubmed:volume |
436
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
149-54
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pubmed:dateRevised |
2008-11-21
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pubmed:meshHeading |
pubmed-meshheading:9781668-Algorithms,
pubmed-meshheading:9781668-Amino Acid Sequence,
pubmed-meshheading:9781668-Animals,
pubmed-meshheading:9781668-Apoproteins,
pubmed-meshheading:9781668-Cattle,
pubmed-meshheading:9781668-Crystallography, X-Ray,
pubmed-meshheading:9781668-Hydrogen-Ion Concentration,
pubmed-meshheading:9781668-Lactoglobulins,
pubmed-meshheading:9781668-Models, Molecular,
pubmed-meshheading:9781668-Molecular Sequence Data,
pubmed-meshheading:9781668-Nuclear Magnetic Resonance, Biomolecular,
pubmed-meshheading:9781668-Protein Conformation,
pubmed-meshheading:9781668-Protein Folding,
pubmed-meshheading:9781668-Protein Structure, Secondary,
pubmed-meshheading:9781668-Static Electricity
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pubmed:year |
1998
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pubmed:articleTitle |
Monomeric bovine beta-lactoglobulin adopts a beta-barrel fold at pH 2.
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pubmed:affiliation |
Istituto Policattedra, Università degli Studi di Verona, Italy.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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