7c7a | pdb_00007c7a

Cryo-EM structure of yeast Ribonuclease MRP with substrate ITS1

spinqualitylabelsall models 7c7a, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7c7a is a 13 chain structure with sequence from Baker's yeast and Saccharomyces cerevisiae (strain atcc 204508 / s288c). Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: MG, ZN Related: 7c79 Activity: Ribonuclease P, with EC number 3.1.26.5 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [POP6_YEAST] Component of ribonuclease P, a protein complex that generates mature tRNA molecules by cleaving their 5'-ends. Also a component of RNase MRP, which cleaves pre-rRNA sequences. [RMP1_YEAST] Functions as part of ribonuclease MRP (RNase MRP), which is involved in rRNA processing in mitochondria. [POP3_YEAST] Required for processing of 5.8S rRNA (short form) at site A3 and for 5'- and 3'-processing of pre-tRNA. [POP7_YEAST] Component of ribonuclease P, a protein complex that generates mature tRNA molecules by cleaving their 5'-ends. Also a component of RNase MRP, which cleaves pre-rRNA sequences. [RPP1_YEAST] Component of ribonuclease P, a protein complex that generates mature tRNA molecules by cleaving their 5'-ends. Also a component of RNase MRP, which cleaves pre-rRNA sequences. [POP1_YEAST] Required for processing of 5.8S rRNA (short form) at site A3 and for 5' and 3' processing of pre-tRNA. [POP8_YEAST] Component of ribonuclease P, a protein complex that generates mature tRNA molecules by cleaving their 5'-ends. Also a component of RNase MRP, which cleaves pre-rRNA sequences. [POP4_YEAST] Required for 5.8S rRNA and tRNA processing; associated with RNase MRP and RNase P. [RMRP_YEAST] Essential component of the MRP ribonucleoprotein endoribonuclease that cleaves mitochondrial primer RNA sequences. [POP5_YEAST] Component of ribonuclease P, a protein complex that generates mature tRNA molecules by cleaving their 5'-ends. Also a component of RNase MRP, which cleaves pre-rRNA sequences. Publication Abstract from PubMed Ribonuclease (RNase) MRP is a conserved eukaryotic ribonucleoprotein complex that plays essential roles in pre-ribosomal RNA (pre-rRNA) processing and cell cycle regulation. In contrast to RNase P, which selectively cleaves tRNA-like substrates, it has remained a mystery how RNase MRP recognizes its diverse substrates. To address this question, we determined cryo-EM structures of Saccharomyces cerevisiae RNase MRP alone and in complex with a fragment of pre-rRNA. These structures combined with biochemical studies reveal that co-evolution of both protein and RNA subunits has transformed RNase MRP into a distinct ribonuclease that processes single-stranded RNAs by recognizing a short, loosely-defined consensus sequence. This broad substrate specificity suggests that RNase MRP may have myriad yet unrecognized substrates that could play important roles in various cellular contexts. Structural insight into precursor ribosomal RNA processing by ribonuclease MRP.,Lan P, Zhou B, Tan M, Li S, Cao M, Wu J, Lei M Science. 2020 Jun 25. pii: science.abc0149. doi: 10.1126/science.abc0149. PMID:32586950 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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