6JIE

YaeO bound to Magnesium from Vibrio cholerae O395

Summary for 6JIE

• Entry DOI: 10.2210/pdb6jie/pdb
• Descriptor: YaeO, MAGNESIUM ION (3 entities in total)
• Functional Keywords: rho specific inhibitor of transcription termination, rna binding, transcription
• Biological source: Vibrio cholerae serotype O1 (strain ATCC 39541 / Classical Ogawa 395 / O395)
• Total number of polymer chains: 2
• Total formula weight: 18722.27

Authors

Pal, K.,Yadav, M.,Sen, U. (deposition date: 2019-02-20, release date: 2019-12-11, Last modification date: 2023-11-22)

Primary citation

Pal, K.,Yadav, M.,Jain, S.,Ghosh, B.,Sen, R.,Sen, U.
Vibrio cholerae YaeO is a Structural Homologue of RNA Chaperone Hfq that Inhibits Rho-dependent Transcription Termination by Dissociating its Hexameric State.
J.Mol.Biol., 431:4749-4766, 2019

PubMed Abstract: Rho-dependent transcription termination is a well-conserved process in bacteria. The Psu and YaeO proteins are the two established inhibitors of the ATP-dependent RNA helicase Rho protein of Escherichia coli. Here, we show a detailed sequence and phylogenetic analysis demonstrating that Vibrio cholerae YaeO (VcYaeO) is significantly distinct from its E. coli counterpart. VcYaeO induces significant growth defect on in vivo expression and inhibits in vitro functions of the V. cholerae Rho on directly binding to the latter. Through various biophysical techniques, we showed that interaction of VcYaeO disrupts the oligomeric state of the VcRho. Structure of VcYaeO solved at 1.75 Å resolution, the first crystal structure of a YaeO protein, demonstrates a beta-sandwich fold distinct from the NMR structure of the EcYaeO. Interestingly, VcYaeO structurally resembles the Hfq protein, and like the latter, it exhibits ssDNA/RNA-binding properties. Docking studies demonstrate probable interactions of VcYaeO with VcRho and mode of inhibition of RNA binding to Rho. We propose that VcYaeO inhibits the function of the Rho protein via disruption of the latter's hexameric assembly and also likely by sequestering the RNA from the Rho primarybinding sites.

PubMed: 31628950
DOI: 10.1016/j.jmb.2019.09.019

Experimental method

X-RAY DIFFRACTION (1.75 Å)