6KJX

Galectin-13 variant C138S


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.53 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Galectin-13/placental protein 13: redox-active disulfides as switches for regulating structure, function and cellular distribution.

Yang, T.Yao, Y.Wang, X.Li, Y.Si, Y.Li, X.Ayala, G.J.Wang, Y.Mayo, K.H.Tai, G.Zhou, Y.Su, J.

(2020) Glycobiology 30: 120-129

  • DOI: 10.1093/glycob/cwz081
  • Primary Citation of Related Structures:  
    6KJX, 6KJW, 6KJY

  • PubMed Abstract: 
  • Galectin-13 (Gal-13) plays numerous roles in regulating the relationship between maternal and fetal tissues. Low expression levels or mutations of the lectin can result in pre-eclampsia. The previous crystal structure and gel filtration data show that Gal-13 dimerizes via formation of two disulfide bonds formed by Cys136 and Cys138 ...

    Galectin-13 (Gal-13) plays numerous roles in regulating the relationship between maternal and fetal tissues. Low expression levels or mutations of the lectin can result in pre-eclampsia. The previous crystal structure and gel filtration data show that Gal-13 dimerizes via formation of two disulfide bonds formed by Cys136 and Cys138. In the present study, we mutated them to serine (C136S, C138S and C136S/C138S), crystalized the variants and solved their crystal structures. All variants crystallized as monomers. In the C136S structure, Cys138 formed a disulfide bond with Cys19, indicating that Cys19 is important for regulation of reversible disulfide bond formation in this lectin. Hemagglutination assays demonstrated that all variants are inactive at inducing erythrocyte agglutination, even though gel filtration profiles indicate that C136S and C138S could still form dimers, suggesting that these dimers do not exhibit the same activity as wild-type (WT) Gal-13. In HeLa cells, the three variants were found to be distributed the same as with WT Gal-13. However, a Gal-13 variant (delT221) truncated at T221 could not be transported into the nucleus, possibly explaining why women having this variant get pre-eclampsia. Considering the normally high concentration of glutathione in cells, WT Gal-13 should exist mostly as a monomer in cytoplasm, consistent with the monomeric variant C136S/C138S, which has a similar ability to interact with HOXA1 as WT Gal-13.


    Organizational Affiliation

    Jilin Province Key Laboratory for Chemistry and Biology of Natural Drugs in Changbai Mountain, The School of Life Sciences, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Galactoside-binding soluble lectin 13 A142Homo sapiensMutation(s): 1 
Gene Names: LGALS13PLAC8
Find proteins for Q9UHV8 (Homo sapiens)
Explore Q9UHV8 
Go to UniProtKB:  Q9UHV8
NIH Common Fund Data Resources
PHAROS:  Q9UHV8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.53 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.617α = 90
b = 53.617β = 90
c = 113.81γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2019-07-23 
  • Released Date: 2019-10-16 
  • Deposition Author(s): Su, J.

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-16
    Type: Initial release
  • Version 1.1: 2020-02-19
    Changes: Database references