5H3N

Solution structure of human Gelsolin protein domain 1 at pH 7.3


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Basis for pH-mediated Regulation of F-actin Severing by Gelsolin Domain 1.

Fan, J.S.Goh, H.Ding, K.Xue, B.Robinson, R.C.Yang, D.

(2017) Sci Rep 7: 45230-45230

  • DOI: https://doi.org/10.1038/srep45230
  • Primary Citation of Related Structures:  
    5H3M, 5H3N

  • PubMed Abstract: 

    Six-domain gelsolin regulates actin structural dynamics through its abilities to sever, cap and uncap F-actin. These activities are modulated by various cellular parameters like Ca 2+ and pH. Until now, only the molecular activation mechanism of gelsolin by Ca 2+ has been understood relatively well. The fragment comprising the first domain and six residues from the linker region into the second domain has been shown to be similar to the full-length protein in F-actin severing activity in the absence of Ca 2+ at pH 5. To understand how this gelsolin fragment is activated for F-actin severing by lowering pH, we solved its NMR structures at both pH 7.3 and 5 in the absence of Ca 2+ and measured the pKa values of acidic amino acid residues and histidine residues. The overall structure and dynamics of the fragment are not affected significantly by pH. Nevertheless, local structural changes caused by protonation of His29 and Asp109 result in the activation on lowering the pH, and protonation of His151 directly effects filament binding since it resides in the gelsolin/actin interface. Mutagenesis studies support that His29, Asp109 and His151 play important roles in the pH-dependent severing activity of the gelsolin fragment.


  • Organizational Affiliation

    Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gelsolin133Homo sapiensMutation(s): 0 
Gene Names: GSN
UniProt & NIH Common Fund Data Resources
Find proteins for P06396 (Homo sapiens)
Explore P06396 
Go to UniProtKB:  P06396
PHAROS:  P06396
GTEx:  ENSG00000148180 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06396
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-11-01
    Type: Initial release
  • Version 1.1: 2019-05-15
    Changes: Data collection, Database references
  • Version 1.2: 2023-06-14
    Changes: Data collection, Database references, Other
  • Version 1.3: 2024-05-15
    Changes: Data collection, Database references