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On the Effects of Leukemogenic Nucleoporin Fusion Proteins on Nucleocytoplasmic Transport and Gene Expression

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Nuclear-Cytoplasmic Transport

Part of the book series: Nucleic Acids and Molecular Biology ((NUCLEIC,volume 33))

Abstract

Chromosomal translocations involving NUP98 and NUP214 genes are recurrently reported in hematologic neoplasms of aggressive nature. Such genomic aberrations encode fusion proteins that conserve the phenylalanine-glycine (FG) domain of the respective nucleoporin fused to a wide range of partners. A common feature of most leukemia patients expressing Nup98 or Nup214 fusion proteins is the upregulation of HOX clustered genes. Consequently, cells expressing Nup98 or Nup214 fusion proteins exhibit perturbed cellular functions that translate in increased self-renewal capacity and impaired cellular differentiation. Given the high affinity of both nucleoporins to several nuclear transport receptors (NTRs) and particularly to the protein export receptor CRM1, both Nup98 and Nup214 are key players in the process of nucleocytoplasmic transport of macromolecules across the nuclear pore complex. Besides their role in nuclear transport, Nup98 and Nup214 participate in a myriad of cellular processes, such as epigenetic memory, mitotic regulation, and gene expression. In this chapter, we summarize the current findings on the effects of Nup98 and Nup214 fusions on cell behavior and their role in the etiology of leukemia.

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Abbreviations

AML:

Acute myeloid leukemia

APC/C:

Anaphase-promoting complex/cyclosome

AUL:

Acute undifferentiated leukemia

circRNA:

Circular RNA

f-circRNA:

Fused circular RNA

FG:

Phenylalanine-glycine

GLEBS:

Gle2-binding sequence

GLFG:

Glycine-leucine-phenylalanine-glycine

HAT:

Histone acetyltransferase

HD:

Homeodomain

HOX:

Homeobox gene

HPCs:

Hematopoietic progenitor cells

INHAT:

Inhibitor of acetyltransferases complex

LMB:

Leptomycin B

mRNPs:

Messenger ribonucleoproteins

NE:

Nuclear envelope

NES:

Nuclear export signal

NPC:

Nuclear pore complex

NTR:

Nuclear transport receptor

PEST:

Proline-glutamic acid-serine-threonine

PHD:

Plant homeodomain

PML:

Promyelocytic leukemia

SET:

Suppressor of variegation enhancer of zeste-trithorax

T-ALL:

T-cell acute lymphoblastic leukemia

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Acknowledgments

This work was supported by grants from the Fonds National de la Recherche Scientifique (FNRS; grant numbers T.0082.14, J.0136.16, and FRIA 16752) and by the Université Libre de Bruxelles.

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Correspondence to Birthe Fahrenkrog .

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Martins, N., Mendes, A., Fahrenkrog, B. (2018). On the Effects of Leukemogenic Nucleoporin Fusion Proteins on Nucleocytoplasmic Transport and Gene Expression. In: Yang, W. (eds) Nuclear-Cytoplasmic Transport. Nucleic Acids and Molecular Biology, vol 33. Springer, Cham. https://doi.org/10.1007/978-3-319-77309-4_10

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