@article{TiedemannIobbiNivolLeimkuehler2022, author = {Tiedemann, Kim and Iobbi-Nivol, Chantal and Leimk{\"u}hler, Silke}, title = {The Role of the Nucleotides in the Insertion of the bis-Molybdopterin Guanine Dinucleotide Cofactor into apo-Molybdoenzymes}, series = {Molecules}, volume = {27}, journal = {Molecules}, edition = {9}, publisher = {MDPI}, address = {Basel, Schweiz}, issn = {1420-3049}, doi = {10.3390/molecules27092993}, pages = {1 -- 15}, year = {2022}, abstract = {The role of the GMP nucleotides of the bis-molybdopterin guanine dinucleotide (bis-MGD) cofactor of the DMSO reductase family has long been a subject of discussion. The recent characterization of the bis-molybdopterin (bis-Mo-MPT) cofactor present in the E. coli YdhV protein, which differs from bis-MGD solely by the absence of the nucleotides, now enables studying the role of the nucleotides of bis-MGD and bis-MPT cofactors in Moco insertion and the activity of molybdoenzymes in direct comparison. Using the well-known E. coli TMAO reductase TorA as a model enzyme for cofactor insertion, we were able to show that the GMP nucleotides of bis-MGD are crucial for the insertion of the bis-MGD cofactor into apo-TorA.}, language = {en} } @misc{TiedemannIobbiNivolLeimkuehler2022, author = {Tiedemann, Kim and Iobbi-Nivol, Chantal and Leimk{\"u}hler, Silke}, title = {The Role of the Nucleotides in the Insertion of the bis-Molybdopterin Guanine Dinucleotide Cofactor into apo-Molybdoenzymes}, series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, journal = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe}, publisher = {Universit{\"a}tsverlag Potsdam}, address = {Potsdam}, issn = {1866-8372}, doi = {10.25932/publishup-56172}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-561728}, pages = {1 -- 15}, year = {2022}, abstract = {The role of the GMP nucleotides of the bis-molybdopterin guanine dinucleotide (bis-MGD) cofactor of the DMSO reductase family has long been a subject of discussion. The recent characterization of the bis-molybdopterin (bis-Mo-MPT) cofactor present in the E. coli YdhV protein, which differs from bis-MGD solely by the absence of the nucleotides, now enables studying the role of the nucleotides of bis-MGD and bis-MPT cofactors in Moco insertion and the activity of molybdoenzymes in direct comparison. Using the well-known E. coli TMAO reductase TorA as a model enzyme for cofactor insertion, we were able to show that the GMP nucleotides of bis-MGD are crucial for the insertion of the bis-MGD cofactor into apo-TorA.}, language = {en} } @misc{MendelLeimkuehler2015, author = {Mendel, Ralf R. and Leimk{\"u}hler, Silke}, title = {The biosynthesis of the molybdenum cofactors}, series = {Journal of biological inorganic chemistry}, volume = {20}, journal = {Journal of biological inorganic chemistry}, number = {2}, publisher = {Springer}, address = {New York}, issn = {0949-8257}, doi = {10.1007/s00775-014-1173-y}, pages = {337 -- 347}, year = {2015}, abstract = {The biosynthesis of the molybdenum cofactors (Moco) is an ancient, ubiquitous, and highly conserved pathway leading to the biochemical activation of molybdenum. Moco is the essential component of a group of redox enzymes, which are diverse in terms of their phylogenetic distribution and their architectures, both at the overall level and in their catalytic geometry. A wide variety of transformations are catalyzed by these enzymes at carbon, sulfur and nitrogen atoms, which include the transfer of an oxo group or two electrons to or from the substrate. More than 50 molybdoenzymes were identified to date. In all molybdoenzymes except nitrogenase, molybdenum is coordinated to a dithiolene group on the 6-alkyl side chain of a pterin called molybdopterin (MPT). The biosynthesis of Moco can be divided into three general steps, with a fourth one present only in bacteria and archaea: (1) formation of the cyclic pyranopterin monophosphate, (2) formation of MPT, (3) insertion of molybdenum into molybdopterin to form Moco, and (4) additional modification of Moco in bacteria with the attachment of a nucleotide to the phosphate group of MPT, forming the dinucleotide variant of Moco. This review will focus on the biosynthesis of Moco in bacteria, humans and plants.}, language = {en} } @article{BoehmerHartmannLeimkuehler2014, author = {Boehmer, Nadine and Hartmann, Tobias and Leimk{\"u}hler, Silke}, title = {The chaperone FdsC for Rhodobacter capsulatus formate dehydrogenase binds the bis-molybdopterin guanine dinucleotide cofactor}, series = {FEBS letters : the journal for rapid publication of short reports in molecular biosciences}, volume = {588}, journal = {FEBS letters : the journal for rapid publication of short reports in molecular biosciences}, number = {4}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0014-5793}, doi = {10.1016/j.febslet.2013.12.033}, pages = {531 -- 537}, year = {2014}, abstract = {Molybdoenzymes are complex enzymes in which the molybdenum cofactor (Moco) is deeply buried in the enzyme. Most molybdoenzymes contain a specific chaperone for the insertion of Moco. For the formate dehydrogenase FdsGBA from Rhodobacter capsulatus the two chaperones FdsC and FdsD were identified to be essential for enzyme activity, but are not a subunit of the mature enzyme. Here, we purified and characterized the FdsC protein after heterologous expression in Escherichia coli. We were able to copurify FdsC with the bound Moco derivate bis-molybdopterin guanine dinucleotide. This cofactor successfully was used as a source to reconstitute the activity of molybdoenzymes. Structured summary of protein interactions: FdsC and FdsC bind by molecular sieving (View interaction) FdsD binds to RcMobA by surface plasmon resonance (View interaction) FdsC binds to RcMobA by surface plasmon resonance (View interaction) FdsC binds to FdsA by surface plasmon resonance (View interaction)}, language = {en} }