Title : Leptomycin B inactivates CRM1/exportin 1 by covalent modification at a cysteine residue in the central conserved region.

Pub. Date : 1999 Aug 3

PMID : 10430904






4 Functional Relationships(s)
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Sentence
Compound Name
Protein Name
Organism
1 Leptomycin B inactivates CRM1/exportin 1 by covalent modification at a cysteine residue in the central conserved region. Cysteine exportin 1 Homo sapiens
2 Inhibition by N-ethylmaleimide (NEM), an alkylating agent, of CRM1-mediated nuclear export probably was caused by covalent binding of the electrophilic structure in NEM to the sulfhydryl group of Cys-529, because the crm1-K1 mutant showed the normal rate for the export of Rev nuclear export signal-bearing proteins in the presence of not only LMB but also NEM. Cysteine exportin 1 Homo sapiens
3 Inhibition by N-ethylmaleimide (NEM), an alkylating agent, of CRM1-mediated nuclear export probably was caused by covalent binding of the electrophilic structure in NEM to the sulfhydryl group of Cys-529, because the crm1-K1 mutant showed the normal rate for the export of Rev nuclear export signal-bearing proteins in the presence of not only LMB but also NEM. Cysteine exportin 1 Homo sapiens
4 These results show that the single cysteine residue determines LMB sensitivity and is selectively alkylated by LMB, leading to CRM1 inactivation. Cysteine exportin 1 Homo sapiens