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