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Title: Expression and purification of affinity-tagged variants of the photochemical reaction center from Heliobacterium modesticaldum

Journal Article · · Photosynthesis Research

The heliobacterial photochemical reaction center (HbRC) from the chlorophototrophic Firmicutes bacterium Heliobacterium modesticaldum is the only homodimeric type I RC whose structure is known. Using genetic techniques recently established in our lab, we have developed a rapid heterologous expression system for the HbRC core polypeptide PshA. Our system relies on rescue of the non-chlorophototrophic ΔpshA::cbp2p-aph3 strain of Hbt. modesticaldum by expression of a heterologous pshA gene from a replicating shuttle vector. Furthermore, we constructed two tagged variants of PshA, one with an N-terminal octahistidine tag and one with an internal hexahistidine tag, which facilitate rapid purification of pure, active HbRC cores in milligram quantities. We constructed a suite of shuttle vectors bearing untagged or tagged versions of pshA driven by various promoters. Surprisingly, we found that the eno and gapDH_2 promoters from Clostridium thermocellum drive better expression of pshA than fragments of DNA derived from the region upstream of the pshA locus on the Hbt. modesticaldum genome. This “pshA rescue” strategy additionally provided a useful window into how Hbt. modesticaldum regulates pigment synthesis and growth rate when chlorophototrophic output decreases.

Research Organization:
Arizona State Univ., Tempe, AZ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
Grant/Contract Number:
SC0010575
OSTI ID:
1631822
Journal Information:
Photosynthesis Research, Vol. 142, Issue 3; ISSN 0166-8595
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

References (38)

A heterogeneous tag-attachment to the homodimeric type 1 photosynthetic reaction center core protein in the green sulfur bacterium Chlorobaculum tepidum journal July 2011
Prokaryotic photosynthesis and phototrophy illuminated journal November 2006
Silver staining of proteins in polyacrylamide gels journal November 2006
Evolution of Oxygenic Photosynthesis journal June 2016
Complete nucleotide sequence and genetic organization of the bacteriocinogenic plasmid, pIP404, from Clostridium perfringens journal March 1988
Structure of a symmetric photosynthetic reaction center–photosystem journal July 2017
Rapid isolation of bacterial photosynthetic reaction centers with an engineered poly-histidine tag journal September 1996
Purification of His6-tagged Photosystem I from Chlamydomonas reinhardtii journal January 2008
A modular system for Clostridium shuttle plasmids journal July 2009
Heliobacterial photosynthesis journal April 2007
Resolution and Reconstitution of a Bound Fe−S Protein from the Photosynthetic Reaction Center of Heliobacterium modesticaldum journal July 2005
Identification and Characterization of PshB, the Dicluster Ferredoxin that Harbors the Terminal Electron Acceptors F A and F B in Heliobacterium modesticaldum , journal March 2007
Chlorophyll breakdown in higher plants journal August 2011
Light-driven quinone reduction in heliobacterial membranes journal March 2018
Heliobacterium modesticaldum, sp. nov., a thermophilic heliobacterium of hot springs and volcanic soils journal April 1995
Menaquinone as the Secondary Electron Acceptor in the Type I Homodimeric Photosynthetic Reaction Center of Heliobacterium modesticaldum journal June 2015
FastCloning: a highly simplified, purification-free, sequence- and ligation-independent PCR cloning method journal January 2011
ESR Signal of the Iron−Sulfur Center F X and Its Function in the Homodimeric Reaction Center of Heliobacterium modesticaldum , journal May 2006
An Electron Spin-Polarized Signal of the P800 + A 1 (Q) State in the Homodimeric Reaction Center Core Complex of Heliobacterium modesticaldum journal April 2008
Identifying promoters for gene expression in Clostridium thermocellum journal December 2015
Evolution of photosynthetic reaction centers: insights from the structure of the heliobacterial reaction center journal March 2018
Engineered biosynthesis of bacteriochlorophyll gF in Rhodobacter sphaeroides journal July 2018
Modulation of the fluorescence yield in heliobacterial cells by induction of charge recombination in the photosynthetic reaction center journal December 2013
Purification of the photosynthetic reaction center from Heliobacterium modesticaldum journal March 2012
Tricine–SDS-PAGE journal May 2006
Genome-wide Transcriptional Response during the Shift to N2-fixing Conditions in Heliobacterium modesticaldum journal January 2018
In-gel digestion for mass spectrometric characterization of proteins and proteomes journal December 2006
Arabidopsis STAY-GREEN , Mendel’s Green Cotyledon Gene, Encodes Magnesium-Dechelatase journal September 2016
High-performance liquid chromatography of chloroplast pigments journal January 1988
Construction of a sequencedClostridium perfringens-Escherichia coli shuttle plasmid journal May 1992
Highly Purified Thermo-Stable Oxygen-Evolving Photosystem II Core Complex from the Thermophilic Cyanobacterium Synechococcus elongatus Having His-Tagged CP43 journal January 1999
Carbon Flow of Heliobacteria Is Related More to Clostridia than to the Green Sulfur Bacteria journal August 2010
Isolation of a photoactive photosynthetic reaction center-core antenna complex from Heliobacillus mobilis journal December 1989
Purification and properties of an antenna-reaction center complex from heliobacteria journal February 1990
Identification of 81-hydroxychlorophyll a as a functional reaction center pigment in heliobacteria journal July 1991
Transient electron paramagnetic resonance spectroscopy on green-sulfur bacteria and heliobacteria at two microwave frequencies journal December 1998
Heliobacterium modesticaldum, sp. nov., a thermophilic heliobacterium of hot springs and volcanic soils journal April 1995
Chlorophyll breakdown in higher plants. text January 2011