5vo8 | pdb_00005vo8

X-ray crystal structure of a bacterial reiterative transcription complex of pyrG promoter

spinqualitylabelsall models 5vo8, resolution 3.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5vo8 is a 9 chain structure with sequence from Thet8 and Thermus thermophilus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: MG, POP, ZN NonStd Res: GTP Related: 5voi Activity: DNA-directed RNA polymerase, with EC number 2.7.7.6 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [RPOC_THET8] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. [RPOB_THET8] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. [RPOA_THET8] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. [RPOZ_THET8] Promotes RNA polymerase assembly. Latches the N- and C-terminal regions of the beta' subunit thereby facilitating its interaction with the beta and alpha subunits (By similarity). [Q5SKW1_THET8] Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released (By similarity).[RuleBase:RU000715] Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. This sigma factor is the primary sigma factor during exponential growth (By similarity).[HAMAP-Rule:MF_00963] Publication Abstract from PubMed Reiterative transcription is a noncanonical form of RNA synthesis in which a nucleotide specified by a single base in the DNA template is repetitively added to the nascent transcript. Here we determined the crystal structure of an RNA polymerase, the bacterial enzyme from Thermus thermophilus, engaged in reiterative transcription during transcription initiation at a promoter resembling the pyrG promoter of Bacillus subtilis The structure reveals that the reiterative transcript detours from the dedicated RNA exit channel and extends toward the main channel of the enzyme, thereby allowing RNA extension without displacement of the promoter recognition sigma-factor. Nascent transcripts containing reiteratively added G residues are eventually extended by nonreiterative transcription, revealing an atypical pathway for the formation of a transcription elongation complex. X-ray crystal structure of a reiterative transcription complex reveals an atypical RNA extension pathway.,Murakami KS, Shin Y, Turnbough CL Jr, Molodtsov V Proc Natl Acad Sci U S A. 2017 Aug 1;114(31):8211-8216. doi:, 10.1073/pnas.1702741114. Epub 2017 Jun 26. PMID:28652344 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also RNA polymerase Sigma factor

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