Download MendeleyThe crystal structure of the Escherichia coli autoinducer-2 processing protein LsrF.
Diaz, Z., Xavier, K.B., Miller, S.T.(2009) PLoS One 4: e6820-e6820
- PubMed: 19714241
- DOI: https://doi.org/10.1371/journal.pone.0006820
- Primary Citation of Related Structures:
3GKF, 3GLC, 3GND - PubMed Abstract:
Many bacteria produce and respond to the quorum sensing signal autoinducer-2 (AI-2). Escherichia coli and Salmonella typhimurium are among the species with the lsr operon, an operon containing AI-2 transport and processing genes that are up regulated in response to AI-2. One of the Lsr proteins, LsrF, has been implicated in processing the phosphorylated form of AI-2. Here, we present the structure of LsrF, unliganded and in complex with two phospho-AI-2 analogues, ribose-5-phosphate and ribulose-5-phosphate. The crystal structure shows that LsrF is a decamer of (alphabeta)(8)-barrels that exhibit a previously unseen N-terminal domain swap and have high structural homology with aldolases that process phosphorylated sugars. Ligand binding sites and key catalytic residues are structurally conserved, strongly implicating LsrF as a class I aldolase.
Organizational Affiliation:
Department of Chemistry and Biochemistry, Swarthmore College, Swarthmore, Pennsylvania, United States of America.
