4kk7

Structure of EccB1 from the type VII (ESX-1) secretion system of Mycobacterium tuberculosis.

spinqualitylabelsall models 4kk7, resolution 1.68Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4kk7 is a 1 chain structure with sequence from Mycobacterium tuberculosis H37Rv. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.68Å Ligands: GOL, NI, TRS Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed BACKGROUND: The ESX-1 type VII secretion system is an important determinant of virulence in pathogenic mycobacteria, including Mycobacterium tuberculosis. This complicated molecular machine secretes folded proteins through the mycobacterial cell envelope to subvert the host immune response. Despite its important role in disease very little is known about the molecular architecture of the ESX-1 secretion system. RESULTS: This study characterizes the structures of the soluble domains of two conserved core ESX-1 components - EccB1 and EccD1. The periplasmic domain of EccB1 consists of 4 repeat domains and a central domain, which together form a quasi 2-fold symmetrical structure. The repeat domains of EccB1 are structurally similar to a known peptidoglycan binding protein suggesting a role in anchoring the ESX-1 system within the periplasmic space. The cytoplasmic domain of EccD1has a ubiquitin-like fold and forms a dimer with a negatively charged groove. CONCLUSIONS: These structures represent a major step towards resolving the molecular architecture of the entire ESX-1 assembly and may contribute to ESX-1 targeted tuberculosis intervention strategies. Structures of EccB1 and EccD1 from the core complex of the mycobacterial ESX-1 type VII secretion system.,Wagner JM, Chan S, Evans TJ, Kahng S, Kim J, Arbing MA, Eisenberg D, Korotkov KV BMC Struct Biol. 2016 Feb 27;16(1):5. doi: 10.1186/s12900-016-0056-6. PMID:26922638 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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