Biology Reference
In-Depth Information
Table 8.3 Distribution of FHb and TrHbs in polar bacteria
Polar bacteria
Strain origin
FHb TrHbs
Colwellia psychrerythraea
34H Arctic marine sediments
1
-
Shewanella frigidimarina
NCMB400
Sea ice, sea water, Antarctica
1
2
Psychrobacter arcticus
273-4
Siberian permafrost
-
-
Psychrobacter cryohalolentis
K5
Siberian permafrost
1
-
Oleispira antarctica
RB-8
Rod Bay, Ross Sea Antarctica
-
-
Pseudoalteromonas haloplanktis
TAC125
Coastal Antarctic sea water, Terre
Ad´lie
13
Desulfotalea psychrophila
LSv54 Arctic marine sediments, Svalbard
-
-
Exiguobacterium sibiricum
255-
15
Siberian permafrost
1
1
Psychroflexus torquis
ATCC
700755
Sea-ice algal assemblage Prydz Bay,
Antarctica
--
Polaribacter filamentous
215
Surface sea water, north of Deadhorse,
Alaska
--
Polaribacter irgensii
23-P
Nearshore marine waters off Antarctic
Peninsula
--
Psychromonas ingrahamii
37
Sea ice, off Point Barrow, Northern
Alaska
11
Marine actinobacterium
PHSC20C1
Nearshore marine waters of Antarctic
Peninsula
11
Interestingly, the
C. psychrerythraea
and
P. cryohalolentis
K5 genomes do
not possess genes encoding TrHbs, but contain a gene for a single FHb;
E. sibiricum
255-15 (
Rodrigues et al., 2008
),
P. ingrahamii
37 (
Riley et al.,
2008
) and
Marine actinobacterium
PHSC20C1 genomes contain one gene
encoding a TrHb and one encoding an FHb;
S. frigidimarina
NCMB400
contains two genes encoding TrHbs and one encoding a FHb;
P. arcticus
273-4,
Oleispira antarctica
RB-8,
D. psychrophila
LSv54,
Psychroflexus torquis
ATCC 700755,
Polaribacter filamentous
215 and
Polaribacter irgensii
23-P do
not possess globin genes (
Table 8.3
).
The presence of multiple genes encoding globins may be considered a
mechanism of defence against oxidative and nitrosative stress also in
mesophilic organisms.
