6z2b

Toprim domain of RNase M5 bound with two Mg2+ ionsToprim domain of RNase M5 bound with two Mg2+ ions

Structural highlights 6z2b is a 4 chain structure with sequence from Geobacillus stearothermophilus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.138Å Ligands: Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A087LGV4_GEOSE Required for correct processing of both the 5' and 3' ends of 5S rRNA precursor. Cleaves both sides of a double-stranded region yielding mature 5S rRNA in one step.[HAMAP-Rule:MF_01469] Publication Abstract from PubMed All species transcribe ribosomal RNA in an immature form that requires several enzymes for processing into mature rRNA. The number and types of enzymes utilized for these processes vary greatly between different species. In low G + C Gram-positive bacteria including Bacillus subtilis and Geobacillus stearothermophilus, the endoribonuclease (RNase) M5 performs the final step in 5S rRNA maturation, by removing the 3'- and 5'-extensions from precursor (pre) 5S rRNA. This cleavage activity requires initial complex formation between the pre-rRNA and a ribosomal protein, uL18, making the full M5 substrate a ribonucleoprotein particle (RNP). M5 contains a catalytic N-terminal Toprim domain and an RNA-binding C-terminal domain, respectively, shown to assist in processing and binding of the RNP. Here, we present structural data that show how two Mg(2+) ions are accommodated in the active site pocket of the catalytic Toprim domain and investigate the importance of these ions for catalysis. We further perform solution studies that support the previously proposed 3'-before-5' order of removal of the pre-5S rRNA extensions and map the corresponding M5 structural rearrangements during catalysis. Structural studies of RNase M5 reveal two-metal-ion supported two-step dsRNA cleavage for 5S rRNA maturation.,Oerum S, Catala M, Bourguet M, Gilet L, Barraud P, Cianferani S, Condon C, Tisne C RNA Biol. 2021 Feb 23:1-11. doi: 10.1080/15476286.2021.1885896. PMID:33541205 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ribonuclease 3D structures

spinqualitylabelsall models 6z2b, resolution 2.14Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image