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XPO1
from Wikipedia

XPO1
Available structures
PDBOrtholog search: C9JV99 PDBe C9JV99 RCSB
Identifiers
AliasesXPO1, CRM1, emb, exp1, exportin 1, CRM-1
External IDsOMIM: 602559; MGI: 2144013; HomoloGene: 2554; GeneCards: XPO1; OMA:XPO1 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_003400

NM_001035226
NM_134014

RefSeq (protein)

NP_003391

NP_001030303
NP_598775

Location (UCSC)Chr 2: 61.48 – 61.54 MbChr 11: 23.21 – 23.25 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

Exportin 1 (XPO1), also known as chromosomal region maintenance 1 (CRM1), is a eukaryotic protein that mediates the nuclear export of various proteins and RNAs.

History

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XPO1 (CRM1) originally was identified in the fission yeast Schizosaccharomyces pombe in a genetic screen, and investigators determined that it was involved in control of the chromosome structure.[5] It was later shown to be the nuclear transport receptor for cargos with leucine-rich nuclear export signals (NES).[6][7][8][9] The structural details of the interaction of XPO1 with its cargos were revealed two decades after the gene was identified.[10][11][12][13]

Function

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XPO1 mediates NES-dependent protein transport. It exports several hundreds of different proteins from the nucleus.[14][15] XPO1 is involved in the nuclear export of ribosomal subunits.[16][17][18] XPO1 plays a role in export of various RNAs including U snRNAs, rRNAs (as a part of ribosomal subunits), and some mRNAs.[19][20][21]

Medical relevance

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XPO1 is involved in various viral infections. For example, it is required for the nuclear export of HIV-1 RNA in complex with the viral protein Rev, an event that is a crucial part of the infection cycle.[22] XPO1 is affected in some cancer types [23] and is therefore viewed as a target for development of anti-cancer drugs.[24] Selinexor, a drug specifically targeting XPO1, was approved by the FDA for treatment of multiple myeloma.[25]

Interactions

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XPO1 has been shown to interact with:

See also

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References

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Further reading

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