Multiple cellular proteins interact with LEDGF/p75 through a conserved unstructured consensus motif
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Lens epithelium-derived growth factor (LEDGF/p75) is an epigenetic reader and attractive therapeutic target involved in HIV integration and the development of mixed lineage leukaemia (MLL1) fusion-driven leukaemia. Besides HIV integrase and the MLL1-menin complex, LEDGF/p75 interacts with various cellular proteins via its integrase binding domain (IBD). Here we present structural characterization of IBD interactions with transcriptional repressor JPO2 and domesticated transposase PogZ, and show that the PogZ interaction is nearly identical to the interaction of LEDGF/p75 with MLL1. The interaction with the IBD is maintained by an intrinsically disordered IBD-binding motif (IBM) common to all known cellular partners of LEDGF/p75. In addition, based on IBM conservation, we identify and validate IWS1 as a novel LEDGF/p75 interaction partner. Our results also reveal how HIV integrase efficiently displaces cellular binding partners from LEDGF/p75. Finally, the similar binding modes of LEDGF/p75 interaction partners represent a new challenge for the development of selective interaction inhibitors. LEDGF/p75, a protein involved in HIV integration and leukaemia, interacts with various cellular proteins via its integrase binding domain (IBD). Here, the authors show that the interaction is mediated by an intrinsically disordered IBD-binding motif (IBM) on all known cellular partners of LEDGF/p75.
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LEDGF/p75 tethers cellular proteins such as MLL1 and MML2 methyltransferases to chromatin through IBD interactions with a linear IBM sequence.
“LEDGF/p75 similarly tethers several cellular proteins to chromatin, including MLL1 and MML2 methyltransferases, via IBD interactions with a linear IBM (for IBD-binding motif) amino acid sequence113.”
From Structure and function of retroviral integrase (2022) · cites this paper as [113]
The Discussion (page not provided) says LEDGF/p75 can tether its binding partners to chromatin through an IBD interface that recognizes the IBM, and identifies MLL1 and MLL2 as partners. It establishes this interaction for MLL1 but says MLL2 most likely uses the same interface; the citing sentence presents MLL2’s mechanism as established. The source spells the protein name MLL2, not MML2. (LLM, conf=0.83)
Experimental — accuracy not yet measuredLentiviruses evolved a functional mimic of the cellular IBM by juxtaposing independent integrase NTDs and CCDs.
“Thus, lentiviruses have leveraged the juxtaposition of independent IN NTDs and CCDs to evolve a functional mimic of the cellular IBM.”
From Structure and function of retroviral integrase (2022) · cites this paper as [113]
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- Authors
- Tesina, P., Čermáková, K., Hořejší, M., Procházková, K., Fábry, M., Sharma, S., Christ, F., Demeulemeester, J., Debyser, Z., Rijck, J. D., Veverka, V., & Řezáčová, P.
- Affiliations
- KU Leuven (BE)
- Czech Academy of Sciences, Institute of Organic Chemistry and Biochemistry (CZ)
- Czech Academy of Sciences, Institute of Molecular Genetics (CZ)
- Corresponding author
- Rijck, Jan De
- Veverka, Václav
- Řezáčová, Pavlína
- ORCID
- Venue
- Nature Communications
- Published
- 2015-08-06
- Volume
- 6
- Issue
- 1
- Pages
- 7968-7968
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W1863439705
- Cited by
- 74
- References
- 69
- Citations by year
- 2026: 6 · 2025: 5 · 2024: 7 · 2023: 12 · 2022: 2 · 2021: 9 · 2020: 7 · 2019: 8 · 2018: 5 · 2017: 8 · 2016: 3 · 2015: 2
- FWCI
- 2.61
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Nature Communications (publishedVersion)
- PubMed (publishedVersion)
- ASEP (publishedVersion)
- Lirias (submittedVersion, other-oa)
- RePEc: Research Papers in Economics (submittedVersion)
- Funders
- Univerzita Karlova v Praze (SVV-2015-260209, RVO 61388963, 68378050)
- Grantová Agentura, Univerzita Karlova
- European Commission (LO1304, 61388963)
- Fonds Wetenschappelijk Onderzoek (KAN2012 1.5.108.12, G.0595.13)
- KU Leuven
- Akademie Věd České Republiky (61388963, RVO 61388963, 68378050)
- Vlaamse regering
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
- Life Sciences › Immunology and Microbiology › Virology › HIV Research and Treatment
- Keywords
- LEDGF/p75, intrinsically disordered proteins, protein-protein interaction, POGZ, MLL1, HIV integrase, HIV integration, epigenetic reader protein
- MeSH terms
- Amino Acid Sequence, DNA-Binding Proteins, Escherichia coli, Humans, Molecular Sequence Data, Histone-Lysine N-Methyltransferase, Proteins, Repressor Proteins, Transcription Factors, Lentivirus, Consensus Sequence, RNA-Binding Proteins, Protein Structure, Tertiary, Cell Cycle Proteins, Dimerization, HIV Integrase, Transposases, Intercellular Signaling Peptides and Proteins, Myeloid-Lymphoid Leukemia Protein
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