Structural basis of HutP-mediated anti-termination and roles of the Mg2+ ion and L-histidine ligand.Kumarevel, T., Mizuno, H., Kumar, P.K.
(2005) Nature 434: 183-191
- PubMed: 15758992
- DOI: 10.1038/nature03355
- Primary Citation of Related Structures:
- Also Cited By: 3BOY, 2GZT, 1WRQ, 1WRO, 1WRN
- PubMed Abstract:
- Crystal Structure of Activated HutP; An RNA Binding Protein that Regulates Transcription of the hut Operon in Bacillus subtilis
Kumarevel, T.S.,Fujimoto, Z.,Karthe, P.,Oda, M.,Mizuno, H.,Kumar, P.K.R.
(2004) Structure 12: 1269
- Identification of important chemical groups of the hut mRNA for HutP interactions that regulate the hut operon in Bacillus subtilis
Kumarevel, T.S.,Gopinath, S.C.,Nishikawa, S.,Mizuno, H.,Kumar, P.K.R.
(2004) Nucleic Acids Res. 32: 3904
HutP regulates the expression of the hut structural genes of Bacillus subtilis by an anti-termination mechanism and requires two components, Mg2+ ions and L-histidine. HutP recognizes three UAG triplet units, separated by four non-conserved nucleotid ...
HutP regulates the expression of the hut structural genes of Bacillus subtilis by an anti-termination mechanism and requires two components, Mg2+ ions and L-histidine. HutP recognizes three UAG triplet units, separated by four non-conserved nucleotides on the terminator region. Here we report the 1.60-A resolution crystal structure of the quaternary complex (HutP-L-histidine-Mg2+-21-base single-stranded RNA). In the complex, the RNA adopts a novel triangular fold on the hexameric surface of HutP, without any base-pairing, and binds to the protein mostly by specific protein-base interactions. The structure explains how the HutP and RNA interactions are regulated critically by the l-histidine and Mg2+ ion through the structural rearrangement. To gain insights into these structural rearrangements, we solved two additional crystal structures (uncomplexed HutP and HutP-L-histidine-Mg2+) that revealed the intermediate structures of HutP (before forming an active structure) and the importance of the Mg2+ ion interactions in the complexes.
Functional Nucleic Acids Group, Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.