| Purification and partial characterization of a procaryotic glycoprotein from the plasma membrane of Thermoplasma acidophilum. | |
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MedLine Citation:
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PMID: 534627 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The obligate, thermophilic, acidophilic mycoplasma, Thermoplasma acidophilum, grows optimally at 56 degrees C and pH 2.0. Its plasma membrane possessed 21--22 protein bands that were resolved by polyacrylamide gel electrophoresis. One major membrane protein, molecular weight 152 000, which stained for carbohydrate with periodic acid-Schiff reagent, accounted for 32% (w/w) of the total membrane proteins. It was isolated and further purified by concanavalin A affinity chromatography. The carbohydrate content amounted to less than 10% (w/w) compared to that of the entire glycoprotein. The carbohydrate moiety consisted mainly of mannose residues with branched alpha 1 leads to 2 linkages at the non-reducing ends of the glycopeptide as determined by permethylation followed by gas chromatography-mass spectrometry analysis. The reducing end was an N-glycosidic linkage between asparagine and N-acetylglucosamine. The amino acid composition of this glycoprotein showed 62 mol% hydrophobic residues, while the acidic amino acid content contributed 9 mol% more than that of the basic amino acids. The existence of membrane glycoproteins in the procaryotic, wall-less T. acidophilum may provide a protective coat for the plasma membrane. The stereochemistry and the conformation of the carbohydrate chains, in conjunciton with water turgor, may contribute to the rigidity of the membrane and the cation binding. |
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Authors:
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L L Yang; A Haug |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Biochimica et biophysica acta Volume: 556 ISSN: 0006-3002 ISO Abbreviation: Biochim. Biophys. Acta Publication Date: 1979 Sep |
Date Detail:
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Created Date: 1980-05-23 Completed Date: 1980-05-23 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0217513 Medline TA: Biochim Biophys Acta Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 265-77 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Biological Amino Acids / analysis Bacterial Proteins / isolation & purification* Carbohydrates / analysis Cell Membrane / analysis Chemical Phenomena Chemistry Glycoproteins / isolation & purification* Membrane Proteins / isolation & purification* Thermoplasma / analysis* |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids; 0/Bacterial Proteins; 0/Carbohydrates; 0/Glycoproteins; 0/Membrane Proteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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