7wjp

Structure of PadR-like protein from Listeria monocytogenes

spinqualitylabelsall models 7wjp, resolution 2.25Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7wjp is a 1 chain structure with sequence from Listeria monocytogenes. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.25Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A1D2INR9_LISMN Publication Abstract from PubMed Listeria monocytogenes is a psychrotrophic food-borne pathogenic bacterium that causes listeriosis. Due to its unusual adaptation, an ability to grow at extended temperatures ranging from 4 to 45 degrees C, L. monocytogenes is notoriously hard to control in food-manufacturing processes. In addition, the growing number of antibiotic-resistant L. monocytogenes strains have made listeriosis steadily refractory to clinical treatments and can lead to serious life-threatening diseases, such as sepsis and meningitis, in immunocompromised persons and neonates. Transcription factors that belong to the PadR family play a key role in bacterial survival against unfavorable environmental stresses. The LltR protein from L. monocytogenes was identified as a PadR-type transcription factor and was shown to be required for bacterial growth adaptation at low temperatures. Despite the functional significance of LltR in listeria survival and pathogenesis, our molecular understanding of the LltR-mediated transcriptional regulation is highly limited. Here, we report the crystal structure of LltR and reveal the operator DNA recognition mechanism used by LltR. LltR dimerizes into an isosceles triangle-like shape and requires a winged helix-turn-helix motif for dsDNA recognition. Indeed, LltR and putative operator dsDNA binding was observed and suggests a transcriptional repression of the llfR-lmo0600-lmo0601 operon by direct interaction between the LltR transcription factor and its promoter region. Structure-based comparative and mutational analyses showed that LltR interacts with dsDNA via a unique strategy that combines both LltR-specific and PadR family-common mechanisms. Structure-based molecular characterization of the LltR transcription factor from Listeria monocytogenes.,Kim J, Park J, Choi Z, Hong M Biochem Biophys Res Commun. 2022 Apr 16;600:142-149. doi:, 10.1016/j.bbrc.2022.02.067. Epub 2022 Feb 20. PMID:35219103 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Proteopedia Page Contributors and Editors (what is this?)

OCA