5b5q | pdb_00005b5q
1.7 Angstroms structure of ChlaDub1 from Chlamydia Trachomatis
Structural highlights
FunctionCDUB1_CHLT2 Effector proteins function to alter host cell physiology and promote bacterial survival in host tissues. This protease possesses deubiquitinating and deneddylating activities (By similarity). Impairs ubiquitination and degradation of NF-kappa-B inhibitor alpha (NFKBIA), thereby preventing NF-kappa-B activation.[1] Publication Abstract from PubMedObligate intracellular Chlamydia trachomatis replicate in a membrane-bound vacuole called inclusion, which serves as a signaling interface with the host cell. Here, we show that the chlamydial deubiquitinating enzyme (Cdu) 1 localizes in the inclusion membrane and faces the cytosol with the active deubiquitinating enzyme domain. The structure of this domain revealed high similarity to mammalian deubiquitinases with a unique alpha-helix close to the substrate-binding pocket. We identified the apoptosis regulator Mcl-1 as a target that interacts with Cdu1 and is stabilized by deubiquitination at the chlamydial inclusion. A chlamydial transposon insertion mutant in the Cdu1-encoding gene exhibited increased Mcl-1 and inclusion ubiquitination and reduced Mcl-1 stabilization. Additionally, inactivation of Cdu1 led to increased sensitivity of C. trachomatis for IFNgamma and impaired infection in mice. Thus, the chlamydial inclusion serves as an enriched site for a deubiquitinating activity exerting a function in selective stabilization of host proteins and protection from host defense. Chlamydia trachomatis-containing vacuole serves as deubiquitination platform to stabilize Mcl-1 and to interfere with host defense.,Fischer A, Harrison KS, Ramirez Y, Auer D, Chowdhury SR, Prusty BK, Sauer F, Dimond Z, Kisker C, Scott Hefty P, Rudel T Elife. 2017 Mar 28;6. pii: e21465. doi: 10.7554/eLife.21465. PMID:28347402[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
| ||||||||||||||||||
