8h0w

RNA polymerase II transcribing a chromatosome (type II)

spinqualitylabelsall models 8h0w, resolution 4.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8h0w is a 11 chain structure with sequence from Homo sapiens, Komagataella phaffii and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 4.6Å Ligands: MG, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function C4QZQ7_KOMPG DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[RuleBase:RU363031] Publication Abstract from PubMed In chromatin, linker histone H1 binds to nucleosomes, forming chromatosomes, and changes the transcription status. However, the mechanism by which RNA polymerase II (RNAPII) transcribes the DNA in the chromatosome has remained enigmatic. Here we report the cryo-electron microscopy (cryo-EM) structures of transcribing RNAPII-chromatosome complexes (forms I and II), in which RNAPII is paused at the entry linker DNA region of the chromatosome due to H1 binding. In the form I complex, the H1 bound to the nucleosome restricts the linker DNA orientation, and the exit linker DNA is captured by the RNAPII DNA binding cleft. In the form II complex, the RNAPII progresses a few bases ahead by releasing the exit linker DNA from the RNAPII cleft, and directly clashes with the H1 bound to the nucleosome. The transcription elongation factor Spt4/5 masks the RNAPII DNA binding region, and drastically reduces the H1-mediated RNAPII pausing. Structural basis of RNA polymerase II transcription on the chromatosome containing linker histone H1.,Hirano R, Ehara H, Kujirai T, Uejima T, Takizawa Y, Sekine SI, Kurumizaka H Nat Commun. 2022 Nov 26;13(1):7287. doi: 10.1038/s41467-022-35003-z. PMID:36435862 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Histone 3D structures RNA polymerase 3D structures

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