Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 11.63 kDa 
• Atom Count: 860 
• Residue Count: 107 
• Unique protein chains: 1

1GH2

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

• DOI: 10.2210/pdb1GH2/pdb

• Classification: ELECTRON TRANSPORT
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2000-11-01 Released: 2001-05-01 
• Deposition Author(s): Jin, J., Chen, X., Guo, Q., Yuan, J., Qiang, B., Rao, Z.

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Experimental Data Snapshot

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

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

• PubMed: 11985582 
• 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. 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
THIOREDOXIN-LIKE PROTEIN	A	107	Homo sapiens	Mutation(s): 0  Gene Names: TXNL1, TRP32, TXL, TXNL
Find proteins for O43396 (Homo sapiens) Explore O43396  Go to UniProtKB:  O43396
NIH Common Fund Data Resources
PHAROS  O43396 GTEx  ENSG00000091164

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 = 87.5	α = 90
b = 48.5	β = 99.59
c = 29.8	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-11-01 
• Released Date: 2001-05-01 
Deposition Author(s): Jin, J., Chen, X., Guo, Q., Yuan, J., Qiang, B., Rao, Z.

Revision History 

• 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