CYANOPHAGES - Cyanobacteria - page 461

syn10 8017(Δ)
syn26 8017(Δ)
syn9 8012(Δ)
S-RSM2 7803(?)
S-SM1 6501(S)
syn19 8109(Δ)
S-SSM5 8102(Δ)

100/-

61/57
56/71

Synechococcus
myoviruses

S-SSM2 8102(Δ)
S-ShM2 8102(Δ)
syn1 8101(S)
syn33 7803(Δ)
S-SSM3 8018(Δ)

10031

94/80

62/-

10091

96/79

syn30 8018(Δ)

S-BM4 7803(?)
S-PM2 7803(S)

SynWH8109
SynCC9902 1, SynCC9902 2
SynWH8017, SynWH8018
SynWH6501
SynCC9605 1, SynCC9605 2
SynWH8102 1, SynWH8102 2
SynWH8103
SynWH8012
SynWH8101
SynWH8020

67/72

62/-

63/-
65/-
71/-
99/67

marine
synechococcus 73

/-

58/84
-/86
100/-
97/86

ProMIT9215
ProMIT9312
ProMIT9302
ProMIT9515
ProMED4

-/93

HL Prochlorococcus

55/74

100/92 ProNATL2A

ProNATL1A
ProSS120
ProMIT9211

LL Prochlorococcus

94/82

100/86

-/83

P-SSM4 NATL2A(P)
P-RSM3 NATL2A(Δ)
P-RSM2 NATL2A(Δ)

Prochlorococcus
myoviruses

-/88

100/99

MIT9313
MIT9303

100/100

LL Prochlorococcus

Anab A
Anab B

100/93

-/60

Arabidopsis

Thermo 2

100/79

96/-

Thermo 1 freshwater

cyanobacteria

91/61 Syncy

Syncy 2
Gloe

100/76

0.1 substitutions per positon

Figure 13: Phylogenetic tree of psbD gene sequences from cultured cyanobacteria and cyanophages. Details as in Figure
10. Sequences where intragenic recombination was detected using other methods (e.g. P-SSM1) were not included in these
phylogenetic analyses. With the kind permission of S.W. Chisholm, Department of Biology, Massachusetts Institute of
Technology, Cambridge, Massachusetts, USA. [Sullivan et al . (2006) PLoS Biol 4(8): e234. doi:10.1371/journal.pbio.0040234]
doi:10.1371/journal.pbio.0040234.g002
Color image of this figure appears in the color plate section at the end of the topic.

Red Sea (Zeidner et al ., 2005) and from Sorcerer II Global Ocean Sampling Project (Rusch et al ., 2007)
but these are distantly related to the psbA sequences from marine Synechococcus , Prochlorococcus and
their viruses. Moreover, on the basis of average GC% , 3rd codon GC% and the triplet sequences
from D1 protein motifs of partial psbA genes from marine picocyanobacteria and their cyanophages
along with environmental psbA sequences reported so far, Wang and Chen (2007) identifi ed fi ve
clusters of psbA sequences, i.e. (i) marine Synechococcus strains (ii) Synechococcus myoviruses (iii)
Synechococcus podoviruses and environmental viral sequences (iv) Prochlorococcus podoviruses
and (v) Prochlorococcus strains and their myoviruses. The absence of psbD gene sequence from the
fi ve marine cyanophages described by Wang and Chen (2007) is consistent with the observations