Download MendeleyStructural basis of interaction between dimeric cyclophilin 1 and Myb1 transcription factor in Trichomonas vaginalis
Martin, T., Lou, Y.C., Chou, C.C., Wei, S.Y., Sadotra, S., Cho, C.C., Lin, M.H., Tai, J.H., Hsu, C.H., Chen, C.(2018) Sci Rep 8: 5410-5410
- PubMed: 29615721
- DOI: https://doi.org/10.1038/s41598-018-23821-5
- Primary Citation of Related Structures:
5YB9, 5YBA - PubMed Abstract:
Cyclophilin 1 (TvCyP1), a cyclophilin type peptidyl-prolyl isomerase present in the human parasite Trichomonas vaginalis, interacts with Myb1 and assists in its nuclear translocation. Myb1 regulates the expression of ap65-1 gene that encodes for a disease causing cytoadherence enzyme. Here, we determined the crystal structures of TvCyP1 and its complex with the minimum TvCyP1-binding sequence of Myb1 (Myb1 104-111 ), where TvCyP1 formed a homodimer, unlike other single domain cyclophilins. In the complex structure, one Myb1 104-111 peptide was bound to each TvCyP1 protomer, with G106-P107 and Y105 fitting well into the active site and auxiliary S2 pocket, respectively. NMR data further showed that TvCyP1 can catalyze the cis/trans isomerization of P107 in Myb1 104-111 . Interestingly, in the well-folded Myb1 protein (Myb1 35-141 ), the minimum binding sequence adopted a different conformation from that of unstructured Myb1 104-111 peptide, that could make P107 binding to the active site of TvCyP1 difficult. However, NMR studies showed that similar to Myb1 104-111 peptide, Myb1 35-141 also interacted with the active site of TvCyP1 and the dynamics of the Myb1 35-141 residues near P107 was reduced upon interaction. Together, the structure of TvCyP1 and detailed structural insights on TvCyP1-Myb1 interaction provided here could pave the way for newer drugs to treat drug-resistant strains.
Organizational Affiliation:
Institute of Biomedical Sciences, Academia Sinica, Taipei, 115, Taiwan.
