TY - JOUR
T1 - Modelled microgravity cultivation modulates N-acylhomoserine lactone production in Rhodospirillum rubrum S1H independently of cell density
AU - Mastroleo, Felice
AU - Van Houdt, Rob
AU - Atkison, Steve
AU - Mergeay, Max
AU - Hendrickx, Larissa
AU - Wattiez, Ruddy
AU - Leys, Natalie
A2 - Condori Catachura, Sandra
N1 - Score = 10
PY - 2013/9/11
Y1 - 2013/9/11
N2 - The photosynthetic alphaproteobacterium Rhodospirillum rubrum S1H is part of the Micro-Ecological Life Support System Alternative (MELiSSA) project that is aiming to develop a closed life support system for oxygen, water and food production to support human life in space in forthcoming long-term space exploration missions. In the present study, Rs. rubrum S1H was cultured in a rotating wall vessel (RWV), simulating partial microgravity conditions on Earth. The bacterium showed a significant response to cultivation in simulated microgravity at the transcriptomic, proteomic and metabolic levels. In simulated microgravity conditions three N-acyl-L-homoserine lactones (C10-HSL, C12-HSL and 3-OH-C14-HSL) were detected in concentrations that were twice those detected under normal gravity, while no differences in cell density was detected. In addition, Rs. rubrum cultivated in modelled microgravity showed higher pigmentation than the normal gravity control, without change in culture oxygenation. When compared to randomized microgravity cultivation using a random positioning machine (RPM), significant overlap for the top differentially expressed genes and proteins was observed. Cultivation in this new artificial environment of simulated microgravity showed new properties of this well-known bacterium including its first complete quorum-sensing-related N-acylhomoserine lactones profile.
AB - The photosynthetic alphaproteobacterium Rhodospirillum rubrum S1H is part of the Micro-Ecological Life Support System Alternative (MELiSSA) project that is aiming to develop a closed life support system for oxygen, water and food production to support human life in space in forthcoming long-term space exploration missions. In the present study, Rs. rubrum S1H was cultured in a rotating wall vessel (RWV), simulating partial microgravity conditions on Earth. The bacterium showed a significant response to cultivation in simulated microgravity at the transcriptomic, proteomic and metabolic levels. In simulated microgravity conditions three N-acyl-L-homoserine lactones (C10-HSL, C12-HSL and 3-OH-C14-HSL) were detected in concentrations that were twice those detected under normal gravity, while no differences in cell density was detected. In addition, Rs. rubrum cultivated in modelled microgravity showed higher pigmentation than the normal gravity control, without change in culture oxygenation. When compared to randomized microgravity cultivation using a random positioning machine (RPM), significant overlap for the top differentially expressed genes and proteins was observed. Cultivation in this new artificial environment of simulated microgravity showed new properties of this well-known bacterium including its first complete quorum-sensing-related N-acylhomoserine lactones profile.
KW - Rhodospirillum rubrum
KW - MELiSSA
KW - Quorum sensing
KW - rotating wall vessel
KW - RWV
KW - simulated microgravity
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_131636
UR - http://knowledgecentre.sckcen.be/so2/bibref/10656
U2 - 10.1099/mic.0.066415-0
DO - 10.1099/mic.0.066415-0
M3 - Article
SN - 1350-0872
VL - 159
SP - 2456
EP - 2466
JO - Microbiology
JF - Microbiology
IS - 10
ER -