An important and largely unanswered question in biology is how the cell integrates the large number of metabolic pathways that comprise its intermediary metabolism. The wealth of genomic information and new technologies developed in recent years make this exciting area of metabolism accessible to researchers. In the last four years, work in the PI's laboratory uncovered a pathway previously thought to be unique to eucaryotes for propionate catabolism in S. enterica and other procaryotes. Although substantial progress has been made toward a better understanding of the biochemistry of this pathway, gaps in our knowledge remain. Studies of regulation of expression of the genes encoding propionate-degrading enzymes identified an interaction between this pathway and the pathway for the degradation of 1,2-propanediol. The well-characterized genetic system of S. enterica offers a unique opportunity to dissect the molecular details of the metabolic integration of these two pathways. Interest in learning more about this example of metabolic pathway integration was increased by the involvement of a protein of S. enterica (CobB) for which there are orthologues in bacteria, archaea, and eucaryotes, including humans. In eucaryotes, CobB orthologues comprise the family of SIR2 regulatory proteins that are involved in the complex process of gene splicing. It has been demonstrated that the human SIR2 protein can compensate for the lack of the CobB protein during cell growth on propionate. The study of CobB function presents a worthwhile opportunity to learn about metabolic integration and other strategies that ensure proper cell function.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM062203-04
Application #
6693374
Study Section
Microbial Physiology and Genetics Subcommittee 2 (MBC)
Program Officer
Jones, Warren
Project Start
2001-01-01
Project End
2005-05-31
Budget Start
2004-01-01
Budget End
2005-05-31
Support Year
4
Fiscal Year
2004
Total Cost
$245,750
Indirect Cost
Name
University of Wisconsin Madison
Department
Microbiology/Immun/Virology
Type
Schools of Earth Sciences/Natur
DUNS #
161202122
City
Madison
State
WI
Country
United States
Zip Code
53715
VanDrisse, Chelsey M; Escalante-Semerena, Jorge C (2018) In Streptomyces lividans, acetyl-CoA synthetase activity is controlled by O-serine and N? -lysine acetylation. Mol Microbiol 107:577-594
VanDrisse, Chelsey M; Escalante-Semerena, Jorge C (2018) Small-Molecule Acetylation Controls the Degradation of Benzoate and Photosynthesis in Rhodopseudomonas palustris. MBio 9:
Burckhardt, Rachel M; Escalante-Semerena, Jorge C (2017) In Bacillus subtilis, the SatA (Formerly YyaR) Acetyltransferase Detoxifies Streptothricin via Lysine Acetylation. Appl Environ Microbiol 83:
VanDrisse, Chelsey M; Parks, Anastacia R; Escalante-Semerena, Jorge C (2017) A Toxin Involved in Salmonella Persistence Regulates Its Activity by Acetylating Its Cognate Antitoxin, a Modification Reversed by CobB Sirtuin Deacetylase. MBio 8:
Rocco, Christopher J; Wetterhorn, Karl M; Garvey, Graeme S et al. (2017) The PrpF protein of Shewanella oneidensis MR-1 catalyzes the isomerization of 2-methyl-cis-aconitate during the catabolism of propionate via the AcnD-dependent 2-methylcitric acid cycle. PLoS One 12:e0188130
VanDrisse, C M; Escalante-Semerena, J C (2016) New high-cloning-efficiency vectors for complementation studies and recombinant protein overproduction in Escherichia coli and Salmonella enterica. Plasmid 86:1-6
VanDrisse, Chelsey M; Hentchel, Kristy L; Escalante-Semerena, Jorge C (2016) Phosphinothricin Acetyltransferases Identified Using In Vivo, In Vitro, and Bioinformatic Analyses. Appl Environ Microbiol 82:7041-7051
Hentchel, Kristy L; Thao, Sandy; Intile, Peter J et al. (2015) Deciphering the Regulatory Circuitry That Controls Reversible Lysine Acetylation in Salmonella enterica. MBio 6:e00891
Stuecker, Tara N; Bramhacharya, Shanti; Hodge-Hanson, Kelsey M et al. (2015) Phylogenetic and amino acid conservation analyses of bacterial L-aspartate-?-decarboxylase and of its zymogen-maturation protein reveal a putative interaction domain. BMC Res Notes 8:354
Hentchel, Kristy L; Escalante-Semerena, Jorge C (2015) In Salmonella enterica, the Gcn5-related acetyltransferase MddA (formerly YncA) acetylates methionine sulfoximine and methionine sulfone, blocking their toxic effects. J Bacteriol 197:314-25

Showing the most recent 10 out of 59 publications