Biology Reference
In-Depth Information
even fewer. Although activities such as nitric oxide dioxygenation and oxygen scaveng-
ing are strong candidates for cellular function, dedicated studies will be required to
complete the story on this intriguing and ancient group of proteins.
ABBREVIATIONS
5c five-coordinate, pentacoordinate
6803 sp. strain PCC 6803
6c six-coordinate, hexacoordinate
7002 sp. strain PCC 7002
CM-H 2 DCFDA 5-
chloromethyl-2 0 ,7 0 -dichlorodihydrofluorescein diacetate,
(and 6-)
acetyl ester
CT charge transfer
CtrHb haem domain of Chlamydomonas eugametos LI637 haemoglobin
DCMU (3,4-dichlorophenyl)-l,l-dimethylurea
EPR electron paramagnetic resonance
FHb flavohaemoglobin
GCS globin-coupled sensor
Hb haemoglobin
HIF hormogonia-inducing factor
IFT intraflagellar transport
LI light induced
M myoglobin-like
Mb myoglobin
NMR nuclear magnetic resonance
NOD nitric oxide dioxygenase
nsHb non-symbiotic haemoglobin
PDB protein data bank
Pgb protoglobin
PTM post-translational modification
RNS reactive nitrogen species
ROS reactive oxygen species
RR resonance Raman
S sensor
SDgb single-domain globin
sHb symbiotic haemoglobin
SSDgb sensor single-domain globin related to the GCS globin domain
T truncated
UV-vis
ultraviolet-visible
1. OVERVIEW
The presence of globins in oxygen-evolving photosynthetic unicellu-
lar organisms may come as a surprise to the unprepared reader. Why would
globins be useful in such cells, not only permeable to dioxygen but gener-
ating it under the action of light? The question derives from the expectation
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