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The enzymes in C4 photosynthesis
TLDR
The Rubisco-mediated oxygenase reaction and associated photorespiration are thereby eliminated and the history of the resolution of C4 photosynthesis follows a pattern of demonstrating the operation of unique photosynthetic biochemistry by various means and then identifying the enzymes necessary to support that biochemistry.
Carbonic Anhydrase Activity in Leaves and Its Role in the First Step of C4 Photosynthesis
TLDR
The calculated effective activity of this enzyme at in vivo CO2 concentrations was apparently just sufficient to prevent the rate of conversion of CO2 to HCO3− from limiting C4 photosynthesis, supported by the mass spectrometric determination of leaf carbonic anhydrase activities.
Pyruvate,Pi Dikinase and NADP-Malate Dehydrogenase in C4 Photosynthesis: Properties and Mechanism of Light/Dark Regulation
TLDR
Two key enzymes of the C4 pathway of photosynthesis, pyruvate, Pi dikinase (PPDK) and NADP-malate dehydrogenase (NADPMDH) are considered and their critical roles in C4 photosynthesis are considered.
The Biochemistry of Manganese in Plants
In plants Mn has a role in many biochemical processes. However, unlike other essential trace elements such as Cu, Zn, Fe and Mo which are usually integral components of enzymes, Mn usually acts as an
Cytokinin Is Required to Induce the Nitrogen-Dependent Accumulation of mRNAs for Phosphoenolpyruvate Carboxylase and Carbonic Anhydrase in Detached Maize Leaves.
Previous studies with intact maize (Zea mays L.) plants indicated that phosphoenolpyruvate carboxylase (PEPC) levels are controlled by nitrogen (N) availability and that this regulation is presumably
Methylglyoxal impairs glucose metabolism and leads to energy depletion in neuronal cells—protection by carbonyl scavengers
TLDR
It is shown that methylglyoxal increases the formation of intracellular reactive oxygen species and lactate in SH-SY5Y neuroblastoma cells and decreases mitochondrial membrane potential and intrACEllular ATP levels, suggesting that carbonyl stress-induced loss of mitochondrial integrity could contribute to the cytotoxicity of methylgly oxal.
Biochemical and molecular characterisation of cubozoan protein toxins.
  • D. Brinkman, J. Burnell
  • Biology, Medicine
    Toxicon : official journal of the International…
  • 15 December 2009
TLDR
Accumulating evidence suggests that cubozoan jellyfish produce at least one group of homologous bioactive proteins that are labile, basic, haemolytic and similar in molecular mass, which suggests that the box jellyfish toxins may act as alpha-pore-forming toxins.
Cloning and characterization of Escherichia coli DUF299: a bifunctional ADP-dependent kinase - Pi-dependent pyrophosphorylase from bacteria
  • J. Burnell
  • Biology, Medicine
    BMC Biochemistry
  • 3 January 2010
TLDR
This paper represents the first report of a bifunctional regulatory enzyme catalysing an ADP-dependent phosphorylation and a Pi-dependent pyrophosphorylation reaction in bacteria.
The reversibility of active sulphate transport in membrane vesicles of Paracoccus denitrificans.
TLDR
It is proposed that the sulphate carrier in the plasma membrane of P. denitrificans operates by a mechanism of electroneutral proton symport, and is capable of actively transporting sulphate in either direction across the plasma membranes, but that in whole cells respiration-driven proton expulsion drives the accumulative uptake of sulphate.
Identification, cloning and sequencing of two major venom proteins from the box jellyfish, Chironex fleckeri.
  • D. Brinkman, J. Burnell
  • Biology, Medicine
    Toxicon : official journal of the International…
  • 1 November 2007
TLDR
Remote protein homology predictions for CfTX-2 and CaTX-A suggest weak structural similarities to pore-forming insecticidal delta-endotoxins Cry1Aa, Cry3Bb and Cry3A, and multiple sequence alignment of the five jellyfish proteins has identified several short, but highly conserved regions of amino acids that coincide with a predicted transmembrane spanning region, referred to as TSR1.
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