5H43

Structural and mechanistical studies of the nuclear import by Importin-alpha


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural insights into the nuclear import of the histone acetyltransferase males-absent-on-the-first by importin alpha 1

Zheng, W.Wang, R.Liu, X.Tian, S.Yao, B.Chen, A.Jin, S.Li, Y.

(2018) Traffic 19: 19-28

  • DOI: https://doi.org/10.1111/tra.12534
  • Primary Citation of Related Structures:  
    5H43

  • PubMed Abstract: 

    The histone acetyltransferase males-absent-on-the-first (MOF) acetylates the histone H4, a modification important for many biological processes, including chromatin organization, transcriptional regulation, DNA replication, recombination and repair, as well as autophagy. Depletion of MOF induces serious consequences because of the reduction of histone acetylation, such as nuclear morphological defects and cancer. Despite the critical roles of MOF in the nucleus, the structural or functional mechanisms of the nucleocytoplasmic transport of MOF remain elusive. Here, we identified novel importin α1-specific nuclear localization signals (NLSs) in the N-terminal of human MOF. The crystal structure of MOF NLSs in complex with importin α1 further revealed a unique binding mode of MOF, with two independent NLSs binding to importin α1 major and minor sites, respectively. The second NLS of MOF displays an unexpected α-helical conformation in the C-terminus, with more extensive contacts with importin α1 not limited in the minor site. Mutations of the key residues on MOF and importin α1 lead to the reduction of their interaction as well as the nuclear import of MOF, revealing an essential role of NLS2 of MOF in interacting with importin α1 minor site. Taken together, we provide structural mechanisms underlying the nucleocytoplasmic transport of MOF, which will be of great importance in understanding the functional regulation of MOF in various biological processes.


  • Organizational Affiliation

    State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Signaling Network, School of Life Sciences, Xiamen University, Fujian, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Importin subunit alpha-1429Homo sapiensMutation(s): 0 
Gene Names: KPNA2RCH1SRP1
UniProt & NIH Common Fund Data Resources
Find proteins for P52292 (Homo sapiens)
Explore P52292 
Go to UniProtKB:  P52292
PHAROS:  P52292
GTEx:  ENSG00000182481 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP52292
Sequence Annotations
Expand
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone acetyltransferase KAT810Homo sapiensMutation(s): 0 
Gene Names: KAT8MOFMYST1
EC: 2.3.1.48
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H7Z6 (Homo sapiens)
Explore Q9H7Z6 
Go to UniProtKB:  Q9H7Z6
PHAROS:  Q9H7Z6
GTEx:  ENSG00000103510 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9H7Z6
Sequence Annotations
Expand
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Histone acetyltransferase KAT815Homo sapiensMutation(s): 0 
Gene Names: KAT8MOFMYST1
EC: 2.3.1.48
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H7Z6 (Homo sapiens)
Explore Q9H7Z6 
Go to UniProtKB:  Q9H7Z6
PHAROS:  Q9H7Z6
GTEx:  ENSG00000103510 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9H7Z6
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.222α = 90
b = 82.222β = 90
c = 169.034γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Natural Science Foundation of ChinaChina31470726

Revision History  (Full details and data files)

  • Version 1.0: 2017-10-25
    Type: Initial release
  • Version 1.1: 2017-12-13
    Changes: Database references
  • Version 1.2: 2018-01-03
    Changes: Database references
  • Version 1.3: 2023-11-08
    Changes: Data collection, Database references, Refinement description