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Nmr Solution Structure Of Plastocyanin From The Photosynthetic Prokaryote, Prochlorothrix Hollandica, Charles R. Babu, Brian F. Volkman, George S. Bullerjahn
Nmr Solution Structure Of Plastocyanin From The Photosynthetic Prokaryote, Prochlorothrix Hollandica, Charles R. Babu, Brian F. Volkman, George S. Bullerjahn
Biological Sciences Faculty Publications
The solution structure of a divergent plastocyanin (PC) from the photosynthetic prokaryote Prochlorothrix hollandica was determined by homonuclear H-1 NMR spectroscopy. Nineteen structures were calculated from 1222 distance restraints, yielding a family of structures having an average rmsd of 0.42 +/- 0.08 Angstrom, for backbone atoms and 0.71 +/- 0.07 Angstrom for heavy atoms to the mean structure. No distance constraint was violated by more than 0.26 Angstrom in the structure family. Despite the low number of conserved residues shared with other PC homologues, the overall folding pattern of P. hollandica PC is similar to other PCs, in that the …
Role Of Iron, Light, And Silicate In Controlling Algal Biomass In Subantarctic Waters Se Of New Zealand, Robert Michael Mckay, Philip Boyd, Julie Laroche, Mark Gall, Russell Frew
Role Of Iron, Light, And Silicate In Controlling Algal Biomass In Subantarctic Waters Se Of New Zealand, Robert Michael Mckay, Philip Boyd, Julie Laroche, Mark Gall, Russell Frew
Biological Sciences Faculty Publications
Phytoplankton processes in subantarctic (SA) waters southeast of New Zealand were studied during austral autumn and spring 1997. Chlorophyll a (0.2–0.3 μg L−1) and primary production (350–650 mg C m−2 d−1) were dominated by cells μm (cyanobacteria) in both seasons. The photochemical efficiency of photosystem II (Fυ/Fm) of cells was low (0.3), indicating physiological stress. Dissolved Fe (DFe) levels in surface waters were subnanomolar, and the molecular marker flavodoxin indicated that cells were iron stressed. In contrast, Subtropical Convergence (STC) and subtropical waters had higher algal biomass/production levels, particularly …