Elucidating the pivotal role of TSPO in porphyrin-related cellular processes, in Bacillus cereus
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
View abstract on PubMed
Summary
This summary is machine-generated.The study reveals that Bacillus cereus TSPO (BcTSPO) is crucial for aerobic metabolism and impacts growth, energy, and motility. This research also uncovers BcTSPO's novel role in regulating tryptophan metabolism.
Area Of Science
- Microbiology
- Molecular Biology
- Biochemistry
Background
- A structural homolog of mammalian Translocator Protein (TSPO) was identified in Bacillus cereus (BcTSPO).
- Recombinant BcTSPO was previously shown to bind and degrade porphyrins.
- The function of BcTSPO in B. cereus physiology remained largely uncharacterized.
Purpose Of The Study
- To investigate the physiological and proteomic impact of BcTSPO absence in B. cereus.
- To elucidate the role of BcTSPO in B. cereus aerobic metabolism and heme biosynthesis.
- To explore the potential involvement of BcTSPO in tryptophan metabolism and virulence.
Main Methods
- Generation of a ΔtspO mutant strain in B. cereus ATCC 14579.
- Comprehensive proteomic analysis of the wild-type and ΔtspO mutant strains.
- Assessment of cellular physiological characteristics, including growth, oxygen consumption, ATP levels, motility, and biofilm formation.
Main Results
- The absence of BcTSPO correlated with growth defects, increased oxygen consumption, and ATP deficiency.
- ΔtspO mutant exhibited heightened tryptophan catabolism, reduced motility, and impaired biofilm formation.
- BcTSPO regulates intracellular metabolites in the coproporphyrin-dependent heme biosynthesis pathway, impacting B. cereus aerobic metabolism.
- TSPO was identified for the first time as a regulator of tryptophan metabolism.
Conclusions
- BcTSPO plays a critical role in B. cereus aerobic metabolism, influencing energy homeostasis and metabolite regulation.
- The study highlights a novel involvement of TSPO in tryptophan metabolism, suggesting broader implications.
- BcTSPO's multifaceted functions may extend to virulence mechanisms in B. cereus.
These videos have been matched automatically. Contact us if they are not relevant.
These videos have been matched automatically. Contact us if they are not relevant.
Related Concept Videos
Mitochondria, chloroplasts, and gram-negative bacteria have transmembrane, beta-barrel proteins called porins to mediate the free diffusion of ions and metabolites across the membrane. Mitochondrial porin precursors contain conserved amino acid sequences called beta signals at their C-terminal. Beta signals have a motif of PoXGXXHyXHy (Po-Polar, X-Any amino acid, G-Glycine, Hy-LargeHydrophobic), which are crucial for precursor recognition to initiate precursor assembly. Beta-barrel...
Cells contain membrane-bound organelles called peroxisomes that oxidize organic molecules by transferring hydrogen atoms to oxygen, producing hydrogen peroxide. Peroxisomes enzymatically convert the released hydrogen peroxide into water and oxygen.
Peroxisomal Protein Import:
Peroxisomes lack the genetic machinery required to code for their own proteins. Hence, most peroxisomal membrane, lumenal and transmembrane proteins are synthesized in the cytoplasm or ER and transported to the peroxisome...
Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...