skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Characterisation of the LH2 spectral variants produced by the photosynthetic purple sulphur bacterium Allochromatium vinosum

Journal Article · · Biochimica et Biophysica Acta - Bioenergetics

This study systematically investigated the different types of LH2 produced by Allochromatium (Alc.) vinosum, a photosynthetic purple sulphur bacterium, in response to variations in growth conditions. Three different spectral forms of LH2 were isolated and purified, the B800-820, B800-840 and B800-850 LH2 types, all of which exhibit an unusual split 800 peak in their low temperature absorption spectra. However, it is likely that more forms are also present. Relatively more B800-820 and B800-840 are produced under low light conditions, while relatively more B800-850 is produced under high light conditions. Polypeptide compositions of the three different LH2 types were determined by a combination of HPLC and TOF/MS. The B800-820, B800-840 and B800-850 LH2 types all have a heterogeneous polypeptide composition, containing multiple types of both α and β polypeptides, and differ in their precise polypeptide composition. They all have a mixed carotenoid composition, containing carotenoids of the spirilloxanthin series. In all cases the most abundant carotenoid is rhodopin; however, there is a shift towards carotenoids with a higher conjugation number in LH2 complexes produced under low light conditions. CD spectroscopy, together with the polypeptide analysis, demonstrates that these Alc. vinosum LH2 complexes are more closely related to the LH2 complex from Phs. molischianum than they are to the LH2 complexes from Rps. acidophila.

Research Organization:
Washington Univ., St. Louis, MO (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
DOE Contract Number:
SC0001035
OSTI ID:
1150020
Report Number(s):
DE-SC0001035-121
Journal Information:
Biochimica et Biophysica Acta - Bioenergetics, Vol. 1837, Issue 11; ISSN 0005-2728
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

References (52)

Complete genome sequence of Allochromatium vinosum DSM 180T journal December 2011
Photochemical reactions of purple bacteria as revealed by studies of three spectrally different carotenobacteriochlorophyll-protein complexes isolated from Chromatium, strain D journal June 1970
Absorption bands of bacteriochlorophyll types in purple bacteria and their response to illumination journal October 1966
Properties of Chromatium Subchromatophore Particles Obtained by Treatment with Triton X-100 * journal July 1966
Differentiation of the photosynthetic apparatus of Chromatium vinosum, strain D: I. The influence of growth conditions journal January 1978
Differentiation of the photosynthesic apparatus of Chromatium vinosum, strain D: II. Structural and functional differences journal January 1978
Differentiation of the photosynthetic apparatus of Chromatium vinosum, strain D: III. Analyses of spectral alterations journal January 1978
Near-Infrared Absorption Spectra of Light Harvesting Bacteriochlorophyll Protein Complexes from Chromatium vinosum1 journal October 1980
Circular Dichroism of Bacteriochlorophyll α in Light Harvesting Bacteriochlorophyll Protein Complexes from Chromatium vinosum1 journal April 1981
X-Ray Diffraction Studies on Chromatophore Membrane from Photosynthetic Bacteria. III. Basic Structure of the Photosynthetic Unit and Its Relation to Other Bacteriochlorophyll Forms1 journal October 1984
Femtosecond Dynamics in Isolated LH2 Complexes of Various Species of Purple Bacteria journal September 1997
Spectroscopic studies of two spectral variants of light-harvesting complex 2 (LH2) from the photosynthetic purple sulfur bacterium Allochromatium vinosum journal September 2012
Crystal structure of an integral membrane light-harvesting complex from photosynthetic bacteria journal April 1995
The architecture and function of the light-harvesting apparatus of purple bacteria: from single molecules to in vivo membranes journal August 2006
The effect of growth conditions on the light-harvesting apparatus in Rhodopseudomonas acidophila journal November 1993
Antenna organization of Rhodopseudomonas acidophila: a study of the excitation migration journal September 1991
Crystallization and preliminary X-ray crystallographic analysis of the B800–820 light-harvesting complex from Rhodopseudomonas acidophila strain 7050 journal April 1999
Genetically modified photosynthetic antenna complexes with blueshifted absorbance bands journal February 1992
The Crystallographic Structure of the B800-820 LH3 Light-Harvesting Complex from the Purple Bacteria Rhodopseudomonas Acidophila Strain 7050 journal July 2001
Single-Molecule Spectroscopy Reveals that Individual Low-Light LH2 Complexes from Rhodopseudomonas palustris 2.1.6. Have a Heterogeneous Polypeptide Composition journal September 2009
The light intensity under which cells are grown controls the type of peripheral light-harvesting complexes that are assembled in a purple photosynthetic bacterium journal October 2011
The crystal structure of the light-harvesting complex II (B800–850) from Rhodospirillum molischianum journal May 1996
The peripheral light-harvesting complexes from purple sulfur bacteria have different ‘ring’ sizes journal October 2008
Fluorescence of native and carotenoid-depleted LH2 from Chromatium minutissimum , originating from simultaneous two-photon absorption in the spectral range of the presumed (optically ‘dark’) S 1 state of carotenoids journal September 2002
Reconstitution of Carotenoids into the Light-Harvesting Complex B800–850 of Chromatium minutissimum journal January 2003
Reconstitution of Okenone into Light Harvesting Complexes from Allochromatium minutissimum journal November 2005
Formation of Bacteriochlorophyll Form B820 in Light Harvesting 2 Complexes from Purple Sulfur Bacteria Treated with Dioxane journal October 2005
Heterogeneity of carotenoid content and composition in LH2 of the purple sulphur bacterium Allochromatium minutissimum grown under carotenoid-biosynthesis inhibition journal October 2008
Femtosecond Spectroscopy of Native and Carotenoidless Purple-Bacterial LH2 Clarifies Functions of Carotenoids journal June 2008
Two-Photon Excitation Spectroscopy of Carotenoid-Containing and Carotenoid-Depleted LH2 Complexes from Purple Bacteria journal August 2009
Light-harvesting complexes from purple sulfur bacteria Allochromatium minutissimum assembled without carotenoids journal March 2012
A modified method for the cultivation of phototrophic bacteria journal December 1983
Gene sequencing and characterization of the light-harvesting complex 2 from thermophilic purple sulfur bacterium Thermochromatium tepidum journal May 2011
Spectroscopic Determination of Tryptophan and Tyrosine in Proteins * journal July 1967
The light-harvesting complexes of a thermophilic purple sulfur photosynthetic bacterium Chromatium tepidum journal July 1986
Deletion of a B800−850 Light-Harvesting Complex in Rhodospirillum molischianum DSM119 Leads to “Revertants” Expressing a B800−820 Complex:  Insights into Pigment Binding journal January 1996
Absorption and CD Spectroscopy and Modeling of Various LH2 Complexes from Purple Bacteria journal April 2002
Red Shift of the Zero Crossing in the CD Spectra of the LH2 Antenna Complex of Rhodopseudomonas acidophila :  A Structure-Based Study journal September 1997
Spectroscopy and structure of bacteriochlorophyll dimers. I. Structural consequences of nonconservative circular dichroism spectra journal April 1997
Light-induced blue shift of the carotenoid spectrum in chromatophores of Chromatium vinosum strain D journal July 1980
Picosecond time-resolved resonance Raman scattering and absorbance changes from carotenoids in light-harvesting systems of photosynthetic bacterium Chromatium vinosum journal June 1990
Isolation and characterization of a subunit form of the light-harvesting complex of Rhodospirillum rubrum journal August 1987
The primary structure of the antenna polypeptides of Ectothiorhodospira halochloris and Ectothiorhodospira halophila. Four core-type antenna polypeptides in E. halochtoris and E. halophila journal May 1992
Methionine oxidation and its effect on the stability of a reconstituted subunit of the light-harvesting complex from Rhodospirillum rubrum : Methionine oxidation and its effect on LH1 subunit journal June 2001
Purification and Characterization of the Polypeptides of Core Light-Harvesting Complexes from Purple Sulfur Bacteria journal January 2003
Structural and spectral characterisation of the antenna complexes of Rhodocyclus gelatinosus. Indications of a hairpin-like-arranged antenna apoprotein with an unusually high alanine content journal June 1994
Two-dimensional structure of the native light-harvesting complex LH2 from Rubrivivax gelatinosus and of a truncated form journal July 2001
The Structure and Thermal Motion of the B800–850 LH2 Complex from Rps.acidophila at 2.0Å Resolution and 100K: New Structural Features and Functionally Relevant Motions journal March 2003
Role of the PufB and PufA C-Terminal Extensions in the Assembly of Rhodospirillum rubrum Light-Harvesting Antenna journal November 2009
Energy Transfer and Exciton Coupling in Isolated B800−850 Complexes of the Photosynthetic Purple Sulfur Bacterium Chromatium tepidum . The Effect of Structural Symmetry on Bacteriochlorophyll Excited States journal January 1996
Ultrafast time-resolved spectroscopy of the light-harvesting complex 2 (LH2) from the photosynthetic bacterium Thermochromatium tepidum journal October 2011
Tracking energy transfer between light harvesting complex 2 and 1 in photosynthetic membranes grown under high and low illumination journal January 2012

Similar Records

On Light-Induced Photoconversion of B800 Bacteriochlorophylls in the LH2 Antenna of the Purple Sulfur Bacterium Allochromatium vinosum
Journal Article · Tue Oct 10 00:00:00 EDT 2017 · Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry · OSTI ID:1150020

High Efficiency Light Harvesting by Carotenoids in the LH2 Complex from Photosynthetic Bacteria: Unique Adaptation to Growth under Low-Light Conditions
Journal Article · Fri Aug 29 00:00:00 EDT 2014 · Journal of Physical Chemistry. B · OSTI ID:1150020

Conformational Complexity in the LH2 Antenna of the Purple Sulfur Bacterium Allochromatium vinosum Revealed by Hole-Burning Spectroscopy
Journal Article · Fri Jun 02 00:00:00 EDT 2017 · Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory · OSTI ID:1150020

Related Subjects