Article ; Online: Intra- and inter-molecular regulation by intrinsically-disordered regions governs PUF protein RNA binding.
2023 Volume 14, Issue 1, Page(s) 7323
Abstract: PUF proteins are characterized by globular RNA-binding domains. They also interact with partner proteins that modulate their RNA-binding activities. Caenorhabditis elegans PUF protein fem-3 binding factor-2 (FBF-2) partners with intrinsically disordered ... ...
Abstract | PUF proteins are characterized by globular RNA-binding domains. They also interact with partner proteins that modulate their RNA-binding activities. Caenorhabditis elegans PUF protein fem-3 binding factor-2 (FBF-2) partners with intrinsically disordered Lateral Signaling Target-1 (LST-1) to regulate target mRNAs in germline stem cells. Here, we report that an intrinsically disordered region (IDR) at the C-terminus of FBF-2 autoinhibits its RNA-binding affinity by increasing the off rate for RNA binding. Moreover, the FBF-2 C-terminal region interacts with its globular RNA-binding domain at the same site where LST-1 binds. This intramolecular interaction restrains an electronegative cluster of amino acid residues near the 5' end of the bound RNA to inhibit RNA binding. LST-1 binding in place of the FBF-2 C-terminus therefore releases autoinhibition and increases RNA-binding affinity. This regulatory mechanism, driven by IDRs, provides a biochemical and biophysical explanation for the interdependence of FBF-2 and LST-1 in germline stem cell self-renewal. |
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MeSH term(s) | Animals ; RNA/genetics ; RNA/metabolism ; Caenorhabditis elegans Proteins/metabolism ; Caenorhabditis elegans/genetics ; Caenorhabditis elegans/metabolism ; Protein Binding ; RNA, Messenger/genetics ; RNA, Messenger/metabolism |
Chemical Substances | RNA (63231-63-0) ; Caenorhabditis elegans Proteins ; RNA, Messenger ; LST-1 protein, C elegans |
Language | English |
Publishing date | 2023-11-13 |
Publishing country | England |
Document type | Journal Article ; Research Support, N.I.H., Intramural ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S. |
ZDB-ID | 2553671-0 |
ISSN | 2041-1723 ; 2041-1723 |
ISSN (online) | 2041-1723 |
ISSN | 2041-1723 |
DOI | 10.1038/s41467-023-43098-1 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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