David Knaff began his scientific career in the Department of Cell Physiology at the University of California, Berkeley. At Berkeley, he worked on chloroplast electron carriers such as the cytochromes and plastocyanin and applied redox potentiometry to characterize these carriers in situ. He moved to Texas Tech University where he made major contributions in the study of ferredoxin-mediated reactions with chloroplast enzymes, most notably nitrite reductase.
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Aparicio PJ, Knaff DB, Malkin R (1975) The role of an iron-sulfur center and siroheme in spinach nitrite reductase. Arch Biochem Biopys 169:102–107
Hirasawa M, Shaw RW, Palmer G, Knaff DB (1987) Prosthetic group content and ligand-binding properties of spinach nitrite reductase. J Biol Chem 262:12428–12433
Hirasawa M, Tripathy JN, Somasundaram R, Johnson MK, Bhalla M, Allen J, Knaff DB (2009) The interaction of spinach nitrite reductase with ferredoxin: a site-directed mutation study. Mol Plant 2:407–415
Hirasawa M, Tripathy JN, Sommer F, Somasundaram R, Chung J, Nestander M, Kruthiventi M, Zabet-Moghaddam M, Johnson MK, Merchant S, Allen JP, Knaff DB (2010) Enzymatic properties of the ferredoxin-dependent nitrite reductase from Chlamydomonas reinhardtii. Evidence for hydroxylamine as a late intermediate in ammonia production. Photosynth Res 103:67–77
Knaff DB (1993) The cytochrome bc 1 complexes of photosynthetic purple bacteria. Photosynth Res 35:117–133
Knaff DB, Arnon DI (1969a) Light-induced oxidation of a chloroplast b-type cytochrome at −189 °C. Proc Natl Acad Sci 63:956–962
Knaff DB, Arnon DI (1969b) Spectral evidence for a new photoreactive component of the oxygen-evolving system in photosynthesis. Proc Natl Acad Sci 63:963–969
Knaff DB, Malkin R (1976) Iron-sulfur proteins of the green photosynthetic bacterium Chlorobium. Biochim Biophys Acta 430:244–252
Malkin R, Knaff DB, Bearden A (1973) The oxidation-reduction potential of membrane-bound chloroplast plastocyanin and cytochrome f. Biochim Biophys Acta 305:675–678
Setif P, Hirasawa M, Cassan N, Lagoutte B, Tripathy JN, Knaff DB (2009) New insights into the catalytic cycle of plant nitrite reductase. Electron transfer kinetics and charge storage. Biochemistry 48:2828–2838
Stoller M, Malkin R, Knaff DB (1977) Oxidation-reduction properties of photosynthetic nitrite reductase. FEBS Lett 81:271–274
Swamy U, Wang M, Tripathy JN, Kim S, Hirasawa M, Knaff DB, Allen J (2005) Structure of spinach nitrite reductase: implications for multi-electron reactions by the iron–sulfur: siroheme cofactor. Biochemistry 44:16054–16063
Wynn RM, Redlinger TE, Foster JM, Blankenship RE, Fuller RC, Shaw RW, Knaff DB (1987) Electron transport chains of phototrophically and chemotrophically grown Chloroflexus aurantiacus. Biochim Biophys Acta 891:216–226
I would like to thank all David’s friends and colleagues who contributed to this Tribute. Their timely response to my requests made my task much easier. In some cases, I did some minor editing of their contributions, and I hope they will forgive me for taking this liberty.
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Malkin, R. Remembering David B. Knaff (1941–2016). Photosynth Res 129, 1–12 (2016). https://doi.org/10.1007/s11120-016-0265-7
- Nitrite Reductase
- Electron Transfer
- Oxidation–reduction potentials