Structural and functional insights of itaconyl-CoA hydratase from Pseudomonas aeruginosa highlight a novel N-terminal hotdog fold.
Pramanik, A., Datta, S.(2024) FEBS Lett 598: 1387-1401
- PubMed: 38575551 
- DOI: https://doi.org/10.1002/1873-3468.14867
- Primary Citation of Related Structures:  
8HUC - PubMed Abstract: 
Itaconyl-CoA hydratase in Pseudomonas aeruginosa (PaIch) converts itaconyl-CoA to (S)-citramalyl-CoA upon addition of a water molecule, a part of an itaconate catabolic pathway in virulent organisms required for their survival in humans host cells. Crystal structure analysis of PaIch showed that a unique N-terminal hotdog fold containing a 4-residue short helical segment α3-, named as an "eaten sausage", followed by a flexible loop region slipped away from the conserved β-sheet scaffold, whereas the C-terminal hotdog fold is similar to all MaoC. A conserved hydratase motif with catalytic residues provides mechanistic insights into catalysis, and existence of a longer substrate binding tunnel may suggest the binding of longer CoA derivatives.
Organizational Affiliation: 
Department of Structural Biology and Bio-informatics, CSIR-Indian Institute of Chemical Biology (CSIR-IICB), Kolkata, India.