9hrm | pdb_00009hrm

Crystal Structure of GH19 domain of D29-LysA (Form III)

spinqualitylabelsall models 9hrm, resolution 2.04Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9hrm is a 2 chain structure with sequence from Mycobacterium phage D29. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.04Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Mycobacterial infections, including tuberculosis, remain a major global health challenge, causing millions of deaths annually. Their treatment is increasingly hindered by limited therapeutic options and rising antimicrobial resistance, highlighting the urgent need for alternative strategies. Mycobacteriophage LysA endolysins are complex multi-domain peptidoglycan hydrolases emerging as potential tools to treat mycobacterial infections. However, despite the therapeutic prospects of LysAs, our understanding of their mechanism of action remains limited. This study provides a comprehensive structural-functional analysis of the catalytic domains of D29LysA and DS6ALysA endolysins (D29N4/D29GH19 and DS6AGH19/DS6AAmi2B), characterised alone and in complex with PG analogues, using protein engineering, X-ray crystallography, small-angle X-ray scattering, and in silico tools. Our results reveal precise details of the substrate-binding site and the catalytic platforms at each domain, including information about substrate-binding mode and conformational changes associated with peptidoglycan recognition and hydrolysis. Moreover, these findings also suggest a coordinated mechanism of action of both catalytic domains in DS6ALysA lysin. These insights represent a significant advance in understanding the structural basis of mycobacterial cell-wall degradation by mycobacteriophage endolysins. Information that may aid in further exploring these endolysins as therapeutic antimicrobial tools in the future. Dissecting the molecular basis underlying mycobacterial cell-wall hydrolysis by the catalytic domains of D29LysA and DS6ALysA phage endolysins.,Ceballos-Zuniga F, Galvez-Larrosa L, Munoz IG, Infantes L, Fernandez-Carrillo J, Perez-Dorado I Int J Biol Macromol. 2025 Dec;334(Pt 1):148896. doi: , 10.1016/j.ijbiomac.2025.148896. Epub 2025 Nov 7. PMID:41207583 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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