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Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase
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| Zeitschriftentitel: | Biochemical Journal |
|---|---|
| Personen und Körperschaften: | , , , , , , , , |
| In: | Biochemical Journal, 384, 2004, 3, S. 599-607 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Portland Press Ltd.
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| Schlagwörter: |
| author_facet |
BLUME, Astrid WEIDEMANN, Wenke STELZL, Ulrich WANKER, Erich E. LUCKA, Lothar DONNER, Peter REUTTER, Werner HORSTKORTE, Rüdiger HINDERLICH, Stephan BLUME, Astrid WEIDEMANN, Wenke STELZL, Ulrich WANKER, Erich E. LUCKA, Lothar DONNER, Peter REUTTER, Werner HORSTKORTE, Rüdiger HINDERLICH, Stephan |
|---|---|
| author |
BLUME, Astrid WEIDEMANN, Wenke STELZL, Ulrich WANKER, Erich E. LUCKA, Lothar DONNER, Peter REUTTER, Werner HORSTKORTE, Rüdiger HINDERLICH, Stephan |
| spellingShingle |
BLUME, Astrid WEIDEMANN, Wenke STELZL, Ulrich WANKER, Erich E. LUCKA, Lothar DONNER, Peter REUTTER, Werner HORSTKORTE, Rüdiger HINDERLICH, Stephan Biochemical Journal Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase Cell Biology Molecular Biology Biochemistry |
| author_sort |
blume, astrid |
| spelling |
BLUME, Astrid WEIDEMANN, Wenke STELZL, Ulrich WANKER, Erich E. LUCKA, Lothar DONNER, Peter REUTTER, Werner HORSTKORTE, Rüdiger HINDERLICH, Stephan 0264-6021 1470-8728 Portland Press Ltd. Cell Biology Molecular Biology Biochemistry http://dx.doi.org/10.1042/bj20040917 <jats:p>UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase is a bifunctional enzyme, which initiates and regulates sialic acid biosynthesis. Sialic acids are important compounds of mammalian glycoconjugates, mediating several biological processes, such as cell–cell or cell–matrix interactions. In order to characterize the function of UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase, a number of deletion mutants were generated, lacking either parts of the N-terminal epimerase or the C-terminal kinase domain. N-terminal deletion of only 39 amino acids results in a complete loss of epimerase activity. Deletions in the C-terminal part result in a reduction or complete loss of kinase activity, depending on the size of the deletion. Deletions at either the N- or the C-terminus also result in a reduction of the other enzyme activity. These results indicate that a separate expression of both domains is possible, but that a strong intramolecular dependency of the two domains has arisen during evolution of the enzyme. N-terminal, as well as C-terminal, mutants tend to form trimers, in addition to the hexameric structure of the native enzyme. These results and yeast two-hybrid experiments show that structures required for dimerization are localized within the kinase domain, and a potential trimerization site is possibly located in a region between the two domains. In conclusion, our results reveal that the activities, as well as the oligomeric structure, of this bifunctional enzyme seem to be organized and regulated in a complex manner.</jats:p> Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-<i>N</i>-acetylglucosamine 2-epimerase/<i>N</i>-acetylmannosamine kinase Biochemical Journal |
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10.1042/bj20040917 |
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Biologie Chemie und Pharmazie |
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Portland Press Ltd., 2004 |
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Portland Press Ltd., 2004 |
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| title |
Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| title_unstemmed |
Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| title_full |
Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| title_fullStr |
Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| title_full_unstemmed |
Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| title_short |
Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| title_sort |
domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, udp-<i>n</i>-acetylglucosamine 2-epimerase/<i>n</i>-acetylmannosamine kinase |
| topic |
Cell Biology Molecular Biology Biochemistry |
| url |
http://dx.doi.org/10.1042/bj20040917 |
| publishDate |
2004 |
| physical |
599-607 |
| description |
<jats:p>UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase is a bifunctional enzyme, which initiates and regulates sialic acid biosynthesis. Sialic acids are important compounds of mammalian glycoconjugates, mediating several biological processes, such as cell–cell or cell–matrix interactions. In order to characterize the function of UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase, a number of deletion mutants were generated, lacking either parts of the N-terminal epimerase or the C-terminal kinase domain. N-terminal deletion of only 39 amino acids results in a complete loss of epimerase activity. Deletions in the C-terminal part result in a reduction or complete loss of kinase activity, depending on the size of the deletion. Deletions at either the N- or the C-terminus also result in a reduction of the other enzyme activity. These results indicate that a separate expression of both domains is possible, but that a strong intramolecular dependency of the two domains has arisen during evolution of the enzyme. N-terminal, as well as C-terminal, mutants tend to form trimers, in addition to the hexameric structure of the native enzyme. These results and yeast two-hybrid experiments show that structures required for dimerization are localized within the kinase domain, and a potential trimerization site is possibly located in a region between the two domains. In conclusion, our results reveal that the activities, as well as the oligomeric structure, of this bifunctional enzyme seem to be organized and regulated in a complex manner.</jats:p> |
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| author | BLUME, Astrid, WEIDEMANN, Wenke, STELZL, Ulrich, WANKER, Erich E., LUCKA, Lothar, DONNER, Peter, REUTTER, Werner, HORSTKORTE, Rüdiger, HINDERLICH, Stephan |
| author_facet | BLUME, Astrid, WEIDEMANN, Wenke, STELZL, Ulrich, WANKER, Erich E., LUCKA, Lothar, DONNER, Peter, REUTTER, Werner, HORSTKORTE, Rüdiger, HINDERLICH, Stephan, BLUME, Astrid, WEIDEMANN, Wenke, STELZL, Ulrich, WANKER, Erich E., LUCKA, Lothar, DONNER, Peter, REUTTER, Werner, HORSTKORTE, Rüdiger, HINDERLICH, Stephan |
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| description | <jats:p>UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase is a bifunctional enzyme, which initiates and regulates sialic acid biosynthesis. Sialic acids are important compounds of mammalian glycoconjugates, mediating several biological processes, such as cell–cell or cell–matrix interactions. In order to characterize the function of UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase, a number of deletion mutants were generated, lacking either parts of the N-terminal epimerase or the C-terminal kinase domain. N-terminal deletion of only 39 amino acids results in a complete loss of epimerase activity. Deletions in the C-terminal part result in a reduction or complete loss of kinase activity, depending on the size of the deletion. Deletions at either the N- or the C-terminus also result in a reduction of the other enzyme activity. These results indicate that a separate expression of both domains is possible, but that a strong intramolecular dependency of the two domains has arisen during evolution of the enzyme. N-terminal, as well as C-terminal, mutants tend to form trimers, in addition to the hexameric structure of the native enzyme. These results and yeast two-hybrid experiments show that structures required for dimerization are localized within the kinase domain, and a potential trimerization site is possibly located in a region between the two domains. In conclusion, our results reveal that the activities, as well as the oligomeric structure, of this bifunctional enzyme seem to be organized and regulated in a complex manner.</jats:p> |
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| imprint | Portland Press Ltd., 2004 |
| imprint_str_mv | Portland Press Ltd., 2004 |
| institution | DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1 |
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| spelling | BLUME, Astrid WEIDEMANN, Wenke STELZL, Ulrich WANKER, Erich E. LUCKA, Lothar DONNER, Peter REUTTER, Werner HORSTKORTE, Rüdiger HINDERLICH, Stephan 0264-6021 1470-8728 Portland Press Ltd. Cell Biology Molecular Biology Biochemistry http://dx.doi.org/10.1042/bj20040917 <jats:p>UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase is a bifunctional enzyme, which initiates and regulates sialic acid biosynthesis. Sialic acids are important compounds of mammalian glycoconjugates, mediating several biological processes, such as cell–cell or cell–matrix interactions. In order to characterize the function of UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase, a number of deletion mutants were generated, lacking either parts of the N-terminal epimerase or the C-terminal kinase domain. N-terminal deletion of only 39 amino acids results in a complete loss of epimerase activity. Deletions in the C-terminal part result in a reduction or complete loss of kinase activity, depending on the size of the deletion. Deletions at either the N- or the C-terminus also result in a reduction of the other enzyme activity. These results indicate that a separate expression of both domains is possible, but that a strong intramolecular dependency of the two domains has arisen during evolution of the enzyme. N-terminal, as well as C-terminal, mutants tend to form trimers, in addition to the hexameric structure of the native enzyme. These results and yeast two-hybrid experiments show that structures required for dimerization are localized within the kinase domain, and a potential trimerization site is possibly located in a region between the two domains. In conclusion, our results reveal that the activities, as well as the oligomeric structure, of this bifunctional enzyme seem to be organized and regulated in a complex manner.</jats:p> Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-<i>N</i>-acetylglucosamine 2-epimerase/<i>N</i>-acetylmannosamine kinase Biochemical Journal |
| spellingShingle | BLUME, Astrid, WEIDEMANN, Wenke, STELZL, Ulrich, WANKER, Erich E., LUCKA, Lothar, DONNER, Peter, REUTTER, Werner, HORSTKORTE, Rüdiger, HINDERLICH, Stephan, Biochemical Journal, Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase, Cell Biology, Molecular Biology, Biochemistry |
| title | Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| title_full | Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| title_fullStr | Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| title_full_unstemmed | Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| title_short | Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| title_sort | domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, udp-<i>n</i>-acetylglucosamine 2-epimerase/<i>n</i>-acetylmannosamine kinase |
| title_unstemmed | Domain-specific characteristics of the bifunctional key enzyme of sialic acid biosynthesis, UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase |
| topic | Cell Biology, Molecular Biology, Biochemistry |
| url | http://dx.doi.org/10.1042/bj20040917 |