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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Satomura, Takenori Kawakami, Ryushi Sakuraba, Haruhiko Ohshima, Toshihisa |
| Description | Country affiliation: Japan Author Affiliation: Satomura T ( Department of Materials Science, Yonago National College of Technology, 4448 Hikona-cho, Yonago, Tottori 683-8506, Japan.) |
| Abstract | Dye-linked D-lactate dehydrogenase activity was found in the crude extract of a continental thermoacidophilic crenarchaeota, Sulfolobus tokodaii strain 7, and was purified 375-fold through four sequential chromatography steps. With a molecular mass of about 93 kDa, this enzyme was a homodimer comprised of identical subunits with molecular masses of about 48 kDa. The enzyme retained its full activity after incubation at 80 degrees C for 10 min and after incubation at pHs ranging from 6.5 to 10.0 for 30 min at 50 degrees C. The preferred substrate for this enzyme was D-lactate, with 2,6-dichloroindophenol serving as the electron acceptor. Using high-performance liquid chromatography (HPLC), the enzyme's prosthetic group was determined to be flavin adenine dinucleotide (FAD). Its N-terminal amino acid sequence was MLEGIEYSQGEEREDFVGFKIKPKI. Using that sequence and previously reported genome information, the gene encoding the enzyme (ST0649) was identified. It was subsequently cloned and expressed in Escherichia coli and found to encode a polypeptide of 440 amino acids with a calculated molecular weight of 49,715. The amino acid sequence of this dye-linked D-lactate dehydrogenase showed higher homology (39% identity) with that of a glycolate oxidase subunit homologue from Archaeoglobus fulgidus, but less similarity (32% identity) to D-lactate dehydrogenase from A. fulgidus. Taken together, our findings indicate that the dye-linked D-lactate dehydrogenase from S. tokodaii is a novel type of FAD containing D-lactate dehydrogenase. |
| File Format | HTM / HTML |
| ISSN | 13891723 |
| Issue Number | 1 |
| Volume Number | 106 |
| e-ISSN | 13474421 |
| Journal | Journal of Bioscience and Bioengineering |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2008-07-01 |
| Publisher Place | Japan |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Biomedical Engineering Discipline Microbiology Escherichia Coli Enzymology Flavin-adenine Dinucleotide Chemistry Metabolism Lactate Dehydrogenases Protein Engineering Methods Sulfolobus Amino Acid Sequence Enzyme Activation Genetics Molecular Sequence Data Species Specificity Classification Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Bioengineering Applied Microbiology and Biotechnology Biotechnology |
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