| Root |
Created: 15 August 1997
| PDB | scop | BSM | RELI Base |
Header | 
¹ |
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| 1kzu | 1kzu | 1kzu | 1kzu | Lightharvesting complex II (B800850); Rhodopseudomonas acidophila strain 10050 | MS6PT1 |
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b |
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¹ Macromolecular Structures abstract.
Full text is available to BioMedNet
Members
The arrangement of prosthetic groups of the lightharvesting complex II
(LHII) proteins from Rhodopseudomonas acidophila
(PDB code 1KZU).
The biologically active LHII is a nonamer of
All drawings were produced by using the program MOLSCRIPT
[2].
ß heterodimers.
1KZU contains onethird of the asymmetric unit
(dimers AB, DE and GH). Each dimer binds three bacteriochlorophyll a
(BChla) molecules and two carotenoid molecules.
Two BChla molecules with absorption maximum at 850 nm (B850) are
perpendicular to the membrane plane and sandwiched between
and ß subunits; one of these
molecules is bound to the subunit
(B850) and the other is bound
to the ß subunit (B850ß).
One BChla molecule with absorption maximum at 800 nm (B800) is
bound to the subunit and is
oriented parallel to the membrane.
Colourcodes:
B850 = deep red;
B850ß = deep purple;
B800 = dark green;
carotenoid (rhodopin glucoside) = brown.
The phytyl chains of BChla are not shown.
As b, carotenoids are not shown; the transmembrane helices
of and ß subunits are shown
( subunits form the inner circle
and ß subunits form the outer one).
The axial ligation of BChla in AB dimers.
Orientation and colourcodes of BChla as a.
References
| Bibliography on structural studies of lightharvesting complex II of purple bacteria |
