1GH2

Crystal structure of the catalytic domain of a new human thioredoxin-like protein

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.22 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.221 

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This is version 1.2 of the entry. See complete history. 


Literature

Crystal structure of the catalytic domain of a human thioredoxin-like protein.

Jin, J., Chen, X., Zhou, Y., Bartlam, M., Guo, Q., Liu, Y., Sun, Y., Gao, Y., Ye, S., Li, G., Rao, Z., Qiang, B., Yuan, J.

(2002) Eur J Biochem 269: 2060-2068

  • DOI: 10.1046/j.1432-1033.2002.02844.x
  • Primary Citation of Related Structures:  
    1GH2

  • PubMed Abstract: 

    • Thioredoxin is a ubiquitous dithiol oxidoreductase found in many organisms and involved in numerous biochemical processes. Human thioredoxin-like protein (hTRXL) is differentially expressed at different development stages of human fetal cerebrum and belongs to an expanding family of thioredoxins ...

    Thioredoxin is a ubiquitous dithiol oxidoreductase found in many organisms and involved in numerous biochemical processes. Human thioredoxin-like protein (hTRXL) is differentially expressed at different development stages of human fetal cerebrum and belongs to an expanding family of thioredoxins. We have solved the crystal structure of the recombinant N-terminal catalytic domain (hTRXL-N) of hTRXL in its oxidized form at 2.2-A resolution. Although this domain shares a similar three-dimensional structure with human thioredoxin (hTRX), a unique feature of hTRXL-N is the large number of positively charged residues distributed around the active site, which has been implicated in substrate specificity. Furthermore, the hTRXL-N crystal structure is monomeric while hTRX is dimeric in its four crystal structures (reduced, oxidized, C73S and C32S/C35S mutants) reported to date. As dimerization is the key regulatory factor in hTRX, the positive charge and lack of dimer formation of hTRXL-N suggest that it could interact with the acidic amino-acid rich C-terminal region, thereby suggesting a novel regulation mechanism.

    Organizational Affiliation: 

    Laboratory of Structural Biology and the MOE Laboratory of Protein Science, School of Life Science & Engineering, Tsinghua University, Beijing, China.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
THIOREDOXIN-LIKE PROTEINA107Homo sapiensMutation(s): 0 
Gene Names: TXNL1, TRP32, TXL, TXNL
UniProt & NIH Common Fund Data Resources
Find proteins for O43396 (Homo sapiens)
Explore O43396 
Go to UniProtKB:  O43396
PHAROS:  O43396
GTEx:  ENSG00000091164
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.22 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.221 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.5α = 90
b = 48.5β = 99.59
c = 29.8γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-05-01
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance