Niels-Ulrik Frigaard

Niels-Ulrik Frigaard

Associate Professor


  1. Published

    Chlorobium Tepidum: Insights into the Structure, Physiology, and Metabolism of a Green Sulfur Bacterium Derived from the Complete Genome Sequence

    Frigaard, Niels-Ulrik, Chew, A. G. M., Li, H., Maresca, J. A. & Bryant, D. A., 2003, In: Photosynthesis Research. 78, 2, p. 93-117 24 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Published

    Chlorobium tepidum mutant lacking bacteriochlorophyll c made by inactivation of the bchK gene, encoding bacteriochlorophyll c synthase

    Frigaard, Niels-Ulrik, Voigt, G. D. & Bryant, D. A., 2002, In: Journal of Bacteriology. 184, 12, p. 3368-3376 8 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Published

    Alle bakterier deler gener ved horisontal overførsel

    Frigaard, Niels-Ulrik, 2007, In: Dansk Kemi. 88, 5, p. 28-31 4 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Published

    A model of the protein–pigment baseplate complex in chlorosomes of photosynthetic green bacteria

    Pedersen, M. Ø., Linnanto, J., Frigaard, Niels-Ulrik, Nielsen, N. C. & Miller, M., 2010, In: Photosynthesis Research. 104, 2-3, p. 233-243 11 p.

    Research output: Contribution to journalReviewResearchpeer-review

  5. Published

    Association of bacteriochlorophyll a with the CsmA protein in chlorosomes of the photosynthetic green filamentous bacterium Chloroflexus aurantiacus

    Sakuragi, Y., Frigaard, Niels-Ulrik, Shimada, K. & Matsuura, K., 1999, In: BBA General Subjects. 1413, 3, p. 172-180 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  6. Published

    Bacteriochlorophyll biosynthesis in green bacteria

    Frigaard, Niels-Ulrik, Chew, A. G. M., Maresca, J. A. & Bryant, D. A., 2006, Chlorophylls and Bacteriochlorophylls: Biochemistry, Biophysics, Functions and Applications. Grimm, B., Porra, R. J., Rüdiger, W. & Scheer, H. (eds.). Berlin: Springer, Vol. 25. p. 201-221

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  7. Published

    Bacteriochlorophyllide c C-82 and C-121 methyltransferases are essential for adaptation to low light in Chlorobaculum tepidum

    Gomez Maqueo Chew, A., Frigaard, Niels-Ulrik & Bryant, D. A., 2007, In: Journal of Bacteriology. 189, 17, p. 6176-6184 8 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  8. Published

    Bacteriochlorophyllide c C-8(2) and C-12(1) Methyltransferases are essential for adaptation to low light in Chlorobaculum tepidum

    Chew, A. G. M., Frigaard, Niels-Ulrik & Bryant, D. A., 2007, In: Journal of Bacteriology.

    Research output: Contribution to journalJournal articleResearchpeer-review

  9. Published

    Base treatment of chlorosomes and the regulation of energy transfer in the base-plate

    Sakuragi, Y., Matsuura, K., Frigaard, Niels-Ulrik, Miller, M. & Cox, R. P., 1998, In: Plant and Cell Physiology.

    Research output: Contribution to journalJournal articleResearch

  10. Published

    Bioengineering of carbon fixation, biofuels, and biochemicals in cyanobacteria and plants

    Rosgaard, L., de Porcellinis, A. J., Jacobsen, J. H., Frigaard, Niels-Ulrik & Sakuragi, Y., 2012, In: Journal of Biotechnology. 162, 1, p. 134–147 14 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  11. Published

    Biotechnology of anoxygenic phototrophic bacteria

    Frigaard, Niels-Ulrik, 2016, Anaerobes in biotechnology. Hatti-Kaul, R., Mamo, G. & Mattiasson, B. (eds.). Springer, p. 139-154 16 p. (Advances in Biochemical Engineering. Biotechnology, Vol. 156).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

  12. Published

    CO2 assimilation in the chemocline of Lake Cadagno is dominated by a few types of phototrophic purple sulfur bacteria

    Storelli, N., Peduzzi, S., Saad, M., Frigaard, Niels-Ulrik, Perret, X. & Tonolla, M., 2013, In: F E M S Microbiology Ecology. 84, 2, p. 421-432 12 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  13. Published

    Carbon isotope fractionation by anoxygenic phototrophic bacteria in euxinic Lake Cadagno

    Posth, Nicole Rita Elisabeth, Bristow, L. A., Cox, R. P., Habicht, K. S., Danza, F., Tonolla, M., Frigaard, Niels-Ulrik & Canfield, D. E., Nov 2017, In: Geobiology. 15, 6, p. 798-816 19 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  14. Published

    Chlorosome protein structure and function and the complete genome sequence of Chlorobium tepidum

    Bryant, D. A., Frigaard, Niels-Ulrik, Vassilieva, E. V. & Eisen, J. A., 2001, In: Photosynthesis Research.

    Research output: Contribution to journalJournal articleResearch

  15. Published

    Chlorosomes: The light-harvesting complexes of green bacteria

    Vassilieva, E. V., Frigaard, Niels-Ulrik & Bryant, D. A., 2000, In: The Spectrum. 13, p. 7-13

    Research output: Contribution to journalJournal articleResearch

  16. Published

    Chlorosomes: antenna organelles in photosynthetic green bacteria

    Frigaard, Niels-Ulrik & Bryant, D. A., 2006, Complex Intracellular Structures in Prokaryotes. Shively, J. M. (ed.). Berlin: Springer, Vol. 2. p. 79-114 (Microbiology Monographs, Vol. 2).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  17. Published

    Chromosomal gene inactivation in the green sulfur bacterium Chlorobium tepidum by natural transformation

    Frigaard, Niels-Ulrik & Bryant, D. A., 2001, In: Applied and Environmental Microbiology. 67, 6, p. 2538-2544 6 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  18. Published

    Community genomics among stratified microbial assemblages in the ocean's interior

    DeLong, E. F., Preston, C. M., Mincer, T., Rich, V., Hallam, S. J., Frigaard, Niels-Ulrik, Martinez, A., Sullivan, M. B., Edwards, R., Brito, B. R., Chisholm, S. W. & Karl, D. M., 2006, In: Science. 311, 5760, p. 496-503 7 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  19. Published

    Comparative and functional genomics of anoxygenic green bacteria from the taxa Chlorobi, Chloroflexi, and Acidobacteria

    Bryant, D. A., Liu, Z., Li, T., Zhao, F., Klatt, C. G., Ward, D. M., Frigaard, Niels-Ulrik & Overmann, J., 2012, Functional genomics and evolution of photosynthetic systems. Burnap, R. L. & Vermaas, W. F. J. (eds.). Springer, p. 47-102 56 p. (Advances in Photosynthesis and Respiration, Vol. 33).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

  20. Published

    Comparative proteomics and activity of a green sulfur bacterium across the water column of Lake Cadagno, Switzerland

    Habicht, K. S., Miller, M., Cox, R. P., Frigaard, Niels-Ulrik, Tonolla, M., Peduzzi, S., Falkenby, L. G. & Andersen, J. S., 2011, In: Environmental Microbiology. 13, 1, p. 203-215 13 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  21. Published

    Complete genome of Ignavibacterium album, a metabolically versatile, flagellated, facultative anaerobe from the phylum Chlorobi

    Liu, Z., Frigaard, Niels-Ulrik, Vogl, K., Iino, T., Ohkuma, M., Overmann, J. & Bryant, D. A., 2012, In: Frontiers in Microbiology. 3, 15 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  22. Published

    Complete genome sequence of "Thiodictyon syntrophicum" sp. nov. strain Cad16T, a photolithoautotrophic purple sulfur bacterium isolated from the alpine meromictic Lake Cadagno

    Luedin, S. M., Pothier, J. F., Danza, F., Storelli, N., Frigaard, Niels-Ulrik, Wittwer, M. & Tonolla, M., 9 May 2018, In: Standards in Genomic Sciences. 13, 14.

    Research output: Contribution to journalJournal articleResearchpeer-review

  23. Published

    Complete genome sequence of the photoautotrophic and bacteriochlorophyll e-synthesizing green sulfur bacterium Chlorobaculum limnaeum DSM 1677T

    Tank, M., Liu, Z., Frigaard, Niels-Ulrik, Tomsho, L. P., Schuster, S. C. & Bryant, D. A., Jun 2017, In: Genome Announcements. 5, 24, 2 p., e00529-17.

    Research output: Contribution to journalJournal articleResearch

  24. Published

    Cyanobacterial biomass as carbohydrate and nutrient feedstock for bioethanol production by yeast fermentation

    Möllers, K. B., Cannella, D., Jørgensen, H. & Frigaard, Niels-Ulrik, 2014, In: Biotechnology for Biofuels. 7, 64, 11 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  25. Published

    Determination of the glycogen content in cyanobacteria

    Porcellinis, A. D., Frigaard, Niels-Ulrik & Sakuragi, Y., 2017, In: Journal of Visualized Experiments. 125, e56068.

    Research output: Contribution to journalJournal articleResearchpeer-review

  26. Published

    Dominance of a clonal green sulfur bacterial population in a stratified lake

    Gregersen, Lea Haarup, Habicht, K. S., Peduzzi, S., Tonolla, M., Canfield, D. E., Miller, M., Cox, R. P. & Frigaard, Niels-Ulrik, 2009, In: FEMS Microbiology Ecology. 70, 1, p. 30-41 12 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  27. Published

    Draft Genome Sequence of Chromatium okenii Isolated from the Stratified Alpine Lake Cadagno

    Luedin, S. M., Liechti, N., Cox, R. P., Danza, F., Frigaard, Niels-Ulrik, Posth, Nicole Rita Elisabeth, Pothier, J. F., Roman, S., Storelli, N., Wittwer, M. & Tonolla, M., 2019, In: Scientific Reports. 9, 14 p., 1936 .

    Research output: Contribution to journalJournal articleResearchpeer-review

  28. Published

    Effect of alkaline treatment on bacteriochlorophyll a, quinones, and energy transfer in chlorosomes from Chlorobium tepidum and Chlorobium phaeobacteroides

    van Walree, C. A., Sakuragi, Y., Steensgaard, D. B., Bösinger, C. S., Frigaard, Niels-Ulrik, Cox, R. P., Holzwarth, A. R. & Miller, M., 1999, In: Photochemistry and Photobiology. 69, p. 322-328 7 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  29. Published

    Effect of alkaline treatment on bacteriochlorophyll a, quinones and energy transfer in chlorosomes from Chlorobium tepidum and Chlorobium phaeobacteroides

    Van Walree, C. A., Sakuragi, Y., Steensgaard, D. B., Bösinger, C. S., Frigaard, Niels-Ulrik, Cox, R. P., Holzwart, A. R. & Miller, M., 1 Jan 1999, In: Photochemistry and Photobiology. 69, 3, p. 322-328 7 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  30. Published

    Electronic energy transfer involving carotenoid pigments in chlorosomes of two green bacteria: Chlorobium tepidum and Chloroflexus aurantiacus

    Melø, T. B., Frigaard, Niels-Ulrik, Matsuura, K. & Razi Naqvi, K., 2000, In: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 56, 10, p. 2001-2010 10 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  31. Published

    Engineering of photosynthetic mannitol biosynthesis from CO2 in a cyanobacterium

    Jacobsen, J. H. & Frigaard, Niels-Ulrik, 2014, In: Metabolic Engineering. 21, p. 60-70 11 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  32. Published

    Exogenous quinones inhibit photosynthetic electron transfer in Chloroflexus aurantiacus by specific quenching of the excited bacteriochlorophyll c antenna

    Frigaard, Niels-Ulrik, Tokita, S. & Matsuura, K., 1999, In: BBA General Subjects. 1413, 3, p. 108-116 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  33. Published

    Gene Inactivation in the Cyanobacterium Synechococcus sp. PCC 7002 and the Green Sulfur Bacterium Chlorobium tepidum Using In Vitro-Made DNA Constructs and Natural Transformation

    Frigaard, Niels-Ulrik, Sakuragi, Y. & Bryant, D. A., 2004, In: Methods in Molecular Biology. 274, p. 325-340 15 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  34. Published

    Genetic manipulation of carotenoid biosynthesis in the green sulfur bacterium Chlorobium tepidum

    Frigaard, Niels-Ulrik, Maresca, J. A., Yunker, C. E., Jones, A. D. & Bryant, D. A., 2004, In: Journal of Bacteriology. 186, 16, p. 5210-5220 10 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  35. Published

    Genomic Insights into the Sulfur Metabolism of Phototrophic Green Sulfur Bacteria

    Frigaard, Niels-Ulrik & Bryant, D. A., 2008, In: Advances in Photosynthesis and Respiration. 27, p. 337-355 18 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  36. Published

    Genomic analysis reveals key aspects of prokaryotic symbiosis in the phototrophic consortium "Chlorochromatium aggregatum"

    Liu, Z., Müller, J., Li, T., Alvey, R. M., Vogl, K., Frigaard, Niels-Ulrik, Rockwell, N. C., Boyd, E. S., Tomsho, L. P., Schuster, S. C., Henke, P., Rohde, M., Overmann, J. & Bryant, D. A., 2013, In: Genome Biology (Online Edition). 14, 11, 16 p., R127 .

    Research output: Contribution to journalJournal articleResearchpeer-review

  37. Published

    Genomic and Evolutionary Perspectives on Sulfur Metabolism in Green Sulfur Bacteria

    Frigaard, Niels-Ulrik & Bryant, D. A., 2008, Microbial Sulfur Metabolism. Springer, p. 60-76 16 p.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  38. Published

    Identification of the bchP gene, encoding geranylgeranyl reductase in Chlorobaculum tepidum

    Gomez Maqueo Chew, A., Frigaard, Niels-Ulrik & Bryant, D. A., 2008, In: Journal of Bacteriology. 190, 2, p. 747-749 3 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  39. Published

    In situ high-resolution structure of the baseplate antenna complex in Chlorobaculum tepidum

    Nielsen, J. T., Kulminskaya, N. V., Bjerring, M., Linnanto, J. M., Rätsep, M., Pedersen, M. Ø., Lambrev, P. H., Dorogi, M., Garab, G., Thomsen, K., Jegerschöld, C., Frigaard, Niels-Ulrik, Lindahl, M. & Nielsen, N. C., 2016, In: Nature Communications. 7, 12 p., 12454.

    Research output: Contribution to journalJournal articleResearchpeer-review

  40. Published

    In situ solid-state NMR spectroscopy of protein in heterogeneous membranes: the baseplate antenna complex of Chlorobaculum tepidum

    Kulminskaya, N., Pedersen, M. Ø., Bjerring, M., Underhaug, J., Miller, M., Frigaard, Niels-Ulrik, Nielsen, J. T. & Nielsen, N. C., 2012, In: Angewandte Chemie International Edition. 51, 28, p. 6891-6895 5 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  41. Published

    Isolation and Characterization of Carotenosomes from a Bacteriochlorophyll c-less Mutant of Chlorobium tepidum

    Frigaard, Niels-Ulrik, Li, H., Martinsson, P., Das, S. K., Frank, H. A., Aartsma, T. J. & Bryant, D. A., 2005, In: Photosynthesis Research. 86, 1-2, p. 101-11 10 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  42. Published

    Isolation and characterization of csmH, a chlorosome envelope protein, from the green sulfur bacterium Chlorobium tepidum

    Milks, K. J., Frigaard, Niels-Ulrik & Bryant, D. A., 2002, In: Abstracts of the General Meeting of the American Society for Microbiology.

    Research output: Contribution to journalJournal articleResearch

  43. Published

    Lake Cadagno: microbial life in crenogenic meromixis

    Tonolla, M., Storelli, N., Danza, F., Gulati, R. D. (ed.), Ravasi, D., Peduzzi, S., Posth, Nicole Rita Elisabeth, Cox, R. P., Jørgensen, M. F., Gregersen, Lea Haarup, Daugbjerg, Niels & Frigaard, Niels-Ulrik, 2017, Ecology of Meromictic Lakes. Gulati, R. D., Zadereev, E. S. & Degermendzhi, A. G. (eds.). Springer, p. 155-186 32 p. (Ecological Studies, Vol. 228).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

  44. Published

    Light-driven oxidation of polysaccharides by photosynthetic pigments and a metalloenzyme

    Cannella, D., Möllers, K. B., Frigaard, Niels-Ulrik, Jensen, Poul Erik, Bjerrum, Morten Jannik, Johansen, Katja Salomon & Felby, C., 2016, In: Nature Communications. 7, 11134.

    Research output: Contribution to journalJournal articleResearchpeer-review

  45. Published

    Location and function of isoprenoid quinones in chlorosomes from green sulfur bacteria

    Frigaard, Niels-Ulrik, Matsuura, K., Hirota, M., Miller, M. & Cox, R. P., 1998, In: Plant and Cell Physiology.

    Research output: Contribution to journalJournal articleResearch

  46. Published

    Mechanisms and evolution of oxidative sulfur metabolism in green sulfur bacteria

    Gregersen, Lea Haarup, Bryant, D. A. & Frigaard, Niels-Ulrik, 2011, In: Frontiers in Microbiology. 2, 14 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  47. Published

    Membrane inlet manometry for the measurement of water activity in aqueous and organic solutions

    Degn, H. & Frigaard, Niels-Ulrik, 1993, In: Analytica Chimica Acta. 274, p. 355-359 5 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  48. Published

    Menaquinone-7 in the reaction center complex of the green sulfur bacterium Chlorobium vibrioforme functions as the electron acceptor A1

    Kjaer, B., Frigaard, Niels-Ulrik, Yang, F., Zybailov, B., Miller, M., Golbeck, J. H. & Scheller, H. V., 1998, In: Biochemistry. 37, 10, p. 3237-3242 5 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  49. Published

    Mikroorganismer på gen-indkøb

    Frigaard, Niels-Ulrik, 2006, In: Aktuel Naturvidenskab. 4, p. 15 1 p.

    Research output: Contribution to journalJournal articleResearch

  50. Published

    Molecular contacts for chlorosome envelope proteins revealed by cross-linking studies with chlorosomes from Chlorobium tepidum

    Li, H., Frigaard, Niels-Ulrik & Bryant, D. A., 2006, In: Biochemistry. 45, 30, p. 9095-9103 8 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

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