Structural Basis of Transcription: RNA Polymerase II at 2.8 Angstrom Resolution (Record no. 40944)

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control field MX-MdCICY
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control field 20250625124646.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-6604
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Title Structural Basis of Transcription: RNA Polymerase II at 2.8 Angstrom Resolution
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Volume/sequential designation Science, 292(5523), p.1863-1876 , 2001
520 3# - SUMMARY, ETC.
Summary, etc. Structures of a 10-subunit yeast RNA polymerase II have been derived from two crystal forms at 2.8 and 3.1 angstrom resolution. Comparison of the structures reveals a division of the polymerase into four mobile modules, including a clamp, shown previously to swing over the active center. In the 2.8 angstrom structure, the clamp is in an open state, allowing entry of straight promoter DNA for the initiation of transcription. Three loops extending from the clamp may play roles in RNA unwinding and DNA rewinding during transcription. A 2.8 angstrom difference Fourier map reveals two metal ions at the active site, one persistently bound and the other possibly exchangeable during RNA synthesis. The results also provide evidence for RNA exit in the vicinity of the carboxyl-terminal repeat domain, coupling synthesis to RNA processing by enzymes bound to this domain.
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Personal name Cramer, P.
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Personal name Bushnell, D. A.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Kornberg, R. D.
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-6604 25.06.2025 25.06.2025 Documentos solicitados