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Cited by 206

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Poly(A) Tail Length Is Controlled by the Nuclear Poly(A)-binding Protein Regulating the Interaction between Poly(A) Polymerase and the Cleavage and Polyadenylation Specificity Factor

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Kühn, Uwe, Gündel, Miriam, Knoth, Anne, Kerwitz, Yvonne, Rüdel, Sabine, Wahle, Elmar·2009·Journal of Biological Chemistry

Abstract

Poly(A) tails of mRNAs are synthesized in the cell nucleus with a defined length, approximately 250 nucleotides in mammalian cells. The same type of length control is seen in an in vitro polyadenylation system reconstituted from three proteins: poly(A) polymerase, cleavage and polyadenylation specificity factor (CPSF), and the nuclear poly(A)-binding protein (PABPN1). CPSF, binding the polyadenylation signal AAUAAA, and PABPN1, binding the growing poly(A) tail, cooperatively stimulate poly(A) polymerase such that a complete poly(A) tail is synthesized in one processive event, which terminates at a length of approximately 250 nucleotides. We report that PABPN1 is required to restrict CPSF binding to the AAUAAA sequence and to permit the stimulation of poly(A) polymerase by AAUAAA-bound CPSF to be maintained throughout the elongation reaction. The stimulation by CPSF is disrupted when the poly(A) tail has reached a length of approximately 250 nucleotides, and this terminates processive elongation. PABPN1 measures the length of the tail and is responsible for disrupting the CPSF-poly(A) polymerase interaction.

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Metadata

Authors
Kühn, U., Gündel, M., Knoth, A., Kerwitz, Y., Rüdel, S., & Wahle, E.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2009-08
Volume
284
Issue
34
Pages
22803-22814
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2004070918
Cited by
206
References
1
FWCI
5.16
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Poly(A) Tail Length Is Controlled by the Nuclear Poly(A)-binding Protein Regulating the Interaction between Poly(A) Polymerase and the Cleavage and Polyadenylation Specificity Factor. https://app.cochat.ai/papers/10.1074/jbc.m109.018226
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Kühn, U., Gündel, M., Knoth, A., Kerwitz, Y., Rüdel, S., & Wahle, E. (2009). Poly(A) Tail Length Is Controlled by the Nuclear Poly(A)-binding Protein Regulating the Interaction between Poly(A) Polymerase and the Cleavage and Polyadenylation Specificity Factor. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m109.018226

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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