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Title: Nuclear export receptor CRM1 recognizes diverse conformations in nuclear export signals

Abstract

Nuclear export receptor CRM1 binds highly variable nuclear export signals (NESs) in hundreds of different cargoes. Previously we have shown that CRM1 binds NESs in both polypeptide orientations. Here, we show crystal structures of CRM1 bound to eight additional NESs which reveal diverse conformations that range from loop-like to all-helix, which occupy different extents of the invariant NES-binding groove. Analysis of all NES structures show 5-6 distinct backbone conformations where the only conserved secondary structural element is one turn of helix that binds the central portion of the CRM1 groove. All NESs also participate in main chain hydrogen bonding with human CRM1 Lys568 side chain, which acts as a specificity filter that prevents binding of non-NES peptides. The large conformational range of NES backbones explains the lack of a fixed pattern for its 3-5 hydrophobic anchor residues, which in turn explains the large array of peptide sequences that can function as NESs.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Univ. of Texas Southwestern Medical Center, Dallas, TX (United States). Dept. of Pharmacology
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER); Cancer Prevention Research Institute of Texas (CPRIT); Welch Foundation; Leukemia and Lymphoma Society Scholar Award; University of Texas Southwestern Endowed Scholars Program; Croucher Foundation Scholarship
OSTI Identifier:
1510248
Grant/Contract Number:  
AC02-06CH11357; RP120352; RP150053; R01 GM069909; I-1532
Resource Type:
Accepted Manuscript
Journal Name:
eLife
Additional Journal Information:
Journal Volume: 6; Journal Issue: 03, 2017; Journal ID: ISSN 2050-084X
Publisher:
eLife Sciences Publications, Ltd.
Country of Publication:
United States
Language:
ENGLISH
Subject:
59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Fung, Ho Yee Joyce, Fu, Szu-Chin, and Chook, Yuh Min. Nuclear export receptor CRM1 recognizes diverse conformations in nuclear export signals. United States: N. p., 2017. Web. doi:10.7554/eLife.23961.
Fung, Ho Yee Joyce, Fu, Szu-Chin, & Chook, Yuh Min. Nuclear export receptor CRM1 recognizes diverse conformations in nuclear export signals. United States. https://doi.org/10.7554/eLife.23961
Fung, Ho Yee Joyce, Fu, Szu-Chin, and Chook, Yuh Min. Fri . "Nuclear export receptor CRM1 recognizes diverse conformations in nuclear export signals". United States. https://doi.org/10.7554/eLife.23961. https://www.osti.gov/servlets/purl/1510248.
@article{osti_1510248,
title = {Nuclear export receptor CRM1 recognizes diverse conformations in nuclear export signals},
author = {Fung, Ho Yee Joyce and Fu, Szu-Chin and Chook, Yuh Min},
abstractNote = {Nuclear export receptor CRM1 binds highly variable nuclear export signals (NESs) in hundreds of different cargoes. Previously we have shown that CRM1 binds NESs in both polypeptide orientations. Here, we show crystal structures of CRM1 bound to eight additional NESs which reveal diverse conformations that range from loop-like to all-helix, which occupy different extents of the invariant NES-binding groove. Analysis of all NES structures show 5-6 distinct backbone conformations where the only conserved secondary structural element is one turn of helix that binds the central portion of the CRM1 groove. All NESs also participate in main chain hydrogen bonding with human CRM1 Lys568 side chain, which acts as a specificity filter that prevents binding of non-NES peptides. The large conformational range of NES backbones explains the lack of a fixed pattern for its 3-5 hydrophobic anchor residues, which in turn explains the large array of peptide sequences that can function as NESs.},
doi = {10.7554/eLife.23961},
journal = {eLife},
number = 03, 2017,
volume = 6,
place = {United States},
year = {Fri Mar 10 00:00:00 EST 2017},
month = {Fri Mar 10 00:00:00 EST 2017}
}

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Cited by: 49 works
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