Database of articles cited by EMDB/PDB/SASBDB data

Keywords
Structure methods	All X-ray diffraction NMR electron microscopy small angle scattering neutron diffraction fiber diffraction powder diffraction infrared spectroscopy EPR fluorescence transfer theoretical model Hybrid
Author
Journal
IF	>30 >20 >10 >5 all

Title	Structure of the cell-binding component of the binary toxin reveals a di-heptamer macromolecular assembly.
Journal, issue, pages	Proc Natl Acad Sci U S A, Vol. 117, Issue 2, Page 1049-1058, Year 2020
Publish date	Jan 14, 2020
Authors	Xingjian Xu / Raquel Godoy-Ruiz / Kaylin A Adipietro / Christopher Peralta / Danya Ben-Hail / Kristen M Varney / Mary E Cook / Braden M Roth / Paul T Wilder / Thomas Cleveland / Alexander Grishaev / Heather M Neu / Sarah L J Michel / Wenbo Yu / Dorothy Beckett / Richard R Rustandi / Catherine Lancaster / John W Loughney / Adam Kristopeit / Sianny Christanti / Jessica W Olson / Alexander D MacKerell / Amedee des Georges / Edwin Pozharski / David J Weber /
PubMed Abstract	Targeting infection is challenging because treatment options are limited, and high recurrence rates are common. One reason for this is that hypervirulent strains often have a binary toxin termed ...Targeting infection is challenging because treatment options are limited, and high recurrence rates are common. One reason for this is that hypervirulent strains often have a binary toxin termed the toxin, in addition to the enterotoxins TsdA and TsdB. The toxin has an enzymatic component, termed CDTa, and a pore-forming or delivery subunit termed CDTb. CDTb was characterized here using a combination of single-particle cryoelectron microscopy, X-ray crystallography, NMR, and other biophysical methods. In the absence of CDTa, 2 di-heptamer structures for activated CDTb (1.0 MDa) were solved at atomic resolution, including a symmetric (CDTb; 3.14 Å) and an asymmetric form (CDTb; 2.84 Å). Roles played by 2 receptor-binding domains of activated CDTb were of particular interest since the receptor-binding domain 1 lacks sequence homology to any other known toxin, and the receptor-binding domain 2 is completely absent in other well-studied heptameric toxins (i.e., anthrax). For CDTb, a Ca binding site was discovered in the first receptor-binding domain that is important for its stability, and the second receptor-binding domain was found to be critical for host cell toxicity and the di-heptamer fold for both forms of activated CDTb. Together, these studies represent a starting point for developing structure-based drug-design strategies to target the most severe strains of .
External links	Proc Natl Acad Sci U S A / PubMed:31896582 / PubMed Central
Methods	EM (single particle) / X-ray diffraction
Resolution	2.3 - 3.7 Å
Structure data	20926 6uwr EMDB-20926, PDB-6uwr: Clostridium difficile binary toxin translocase CDTb in asymmetric tetradecamer conformation Method: EM (single particle) / Resolution: 2.8 Å 20927 6uwt EMDB-20927, PDB-6uwt: Clostridium difficile binary toxin translocase CDTb tetradecamer in symmetric conformation Method: EM (single particle) / Resolution: 3.1 Å PDB-6uwi: Crystal structure of the Clostridium difficile translocase CDTb Method: X-RAY DIFFRACTION / Resolution: 3.7 Å PDB-6uwo: Crystal structure of receptor binding domain 2 from Clostridium difficile translocase CDTb Method: X-RAY DIFFRACTION / Resolution: 2.3 Å
Chemicals	ChemComp-CA: Unknown entry ChemComp-HOH: WATER / Water
Source	clostridioides difficile (bacteria)
Keywords	TOXIN / Translocase / RBD2 / CDTb / binary toxin / tetradecamer