Genome-based identification and characterization of a putative mucin-binding protein from the surface of Streptococcus pneumoniae
| Autor: | James E. Littlejohn, Alexander H. Lucas, Michael Y. Galperin, Hannah Nayakanti, Daniel J. Rigden, Daniela Bumbaca, Mark J. Jedrzejas |
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| Rok vydání: | 2006 |
| Předmět: |
Vesicle-associated membrane protein 8
Molecular Sequence Data Protein domain Biochemistry Open Reading Frames Protein structure Bacterial Proteins Sequence Analysis Protein Structural Biology Protein A/G Amino Acid Sequence Cloning Molecular Molecular Biology biology Circular Dichroism Binding protein Cell Membrane Mucin Mucins Computational Biology Gene Expression Regulation Bacterial Molecular biology Open reading frame Streptococcus pneumoniae Chromatography Gel biology.protein Protein G Carrier Proteins Genetic Engineering Genome Bacterial |
| Zdroj: | Proteins: Structure, Function, and Bioinformatics. 66:547-558 |
| ISSN: | 0887-3585 |
| DOI: | 10.1002/prot.21205 |
| Popis: | Streptococcus pneumoniae open reading frame SP1492 encodes a surface protein that contains a novel conserved domain similar to the repeated fragments of mucin-binding proteins from lactobacilli and lactococci. To investigate the functional role(s) of this protein and its potential adhesive properties, the surface-exposed region of SP1492 was expressed in Escherichia coli, purified to homogeneity, and partially characterized by biophysical and immunological methods. Circular dichroism and sedimentation measurements con- firmed that SP1492 is an all-b protein that exists in solution as a monomer. The SP1492 protein has been shown to be expressed by S. pneumoniae and was experimentally localized to its surface. The protein functional domain binds to mucins II and III from porcine stomach and to purified submax- illary bovine gland mucin. It appears to be one of the very few unambiguous pneumococcal adhesin molecules known to date. A hypothetical model constructed by ab initio techniques predicts a novel b-sandwich protein structure. Proteins 2007; 66:547-558. V C 2006 Wiley-Liss, Inc. |
| Databáze: | OpenAIRE |
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