Nonantibiotic properties of tetracyclines: structural basis for inhibition of secretory phospholipase A2.

Daniela Dalm 1 Gottfried J. Palm 1 Alexey Aleksandrov 2 Thomas Simonson 2 Winfried Hinrichs 1
1 Institute for Biochemistry
2 BIOC - Laboratoire de Biochimie de l'Ecole polytechnique
Abstract : Secretory phospholipase A(2) is involved in inflammatory processes and was previously shown to be inhibited by lipophilic tetracyclines such as minocycline (minoTc) and doxycycline. Lipophilic tetracyclines might be a new lead compound for the design of specific inhibitors of secretory phospholipase A(2), which play a crucial role in inflammatory processes. Our X-ray crystal structure analysis at 1.65 A resolution of the minoTc complex of phospholipase A(2) (PLA(2)) of the Indian cobra (Naja naja naja) is the first example of nonantibiotic tetracycline interactions with a protein. MinoTc interferes with the conformation of the active-site Ca(2+)-binding loop, preventing Ca(2)(+) binding, and shields the active site from substrate entrance, resulting in inhibition of the enzyme. MinoTc binding to PLA(2) is dominated by hydrophobic interactions quite different from antibiotic recognition of tetracyclines by proteins or the ribosome. The affinity of minoTc for PLA(2) was determined by surface plasmon resonance, resulting in a dissociation constant K(d)=1.8 x 10(-)(4) M.
Document type :
Journal articles
Complete list of metadatas
https://hal-polytechnique.archives-ouvertes.fr/hal-00488178
Contributor : Thomas Simonson <>
Submitted on : Tuesday, June 1, 2010 - 1:42:18 PM
Last modification on : Tuesday, August 27, 2019 - 11:40:06 AM

Identifiers

Collections

CNRS | X | X-BIOCH | PARISTECH | X-DEP-BIO

Citation

Daniela Dalm, Gottfried J. Palm, Alexey Aleksandrov, Thomas Simonson, Winfried Hinrichs. Nonantibiotic properties of tetracyclines: structural basis for inhibition of secretory phospholipase A2.. Journal of Molecular Biology, Elsevier, 2010, 398 (1), pp.83-96. ⟨10.1016/j.jmb.2010.02.049⟩. ⟨hal-00488178⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

178

Contact

Informations

CCSD