Macromolecule Content

• Total Structure Weight: 12996.74 
• Atom Count: 914 
• Residue Count: 118 
• Unique protein chains: 2

1CQG

HIGH RESOLUTION SOLUTION NMR STRUCTURE OF MIXED DISULFIDE INTERMEDIATE BETWEEN HUMAN THIOREDOXIN (C35A, C62A, C69A, C73A) MUTANT AND A 13 RESIDUE PEPTIDE COMPRISING ITS TARGET SITE IN HUMAN REF-1 (RESIDUES 59-71 OF THE P50 SUBUNIT OF NFKB), NMR, 31 STRUCTURES

• DOI: 10.2210/pdb1CQG/pdb

• Classification: COMPLEX (ELECTRON TRANSPORT/PEPTIDE)
• Organism(s): Homo sapiens
• Mutation(s): 4 


• Deposited: 1996-04-02 Released: 1996-08-01 
• Deposition Author(s): Clore, G.M., Qin, J., Gronenborn, A.M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 35 

Literature

The solution structure of human thioredoxin complexed with its target from Ref-1 reveals peptide chain reversal.

Qin, J., Clore, G.M., Kennedy, W.P., Kuszewski, J., Gronenborn, A.M.

(1996) Structure 4: 613-620

• PubMed: 8736558 
• Primary Citation of Related Structures:  
  1CQH


• PubMed Abstract: 
  

Human thioredoxin (hTRX) is a 12 kDa cellular redox protein that has been shown to play an important role in the activation of a number of transcriptional and translational regulators via a thiol-redox mechanism. This activity may be direct or indirect via another redox protein known as Ref-1. The structure of a complex of hTRX with a peptide comprising its target from the transcription factor NF kappa B has previously been solved. To further extend our knowledge of the recognition by and interaction of hTRX with its various targets, we have studied a complex between hTRX and a Ref-1 peptide. This complex represents a kinetically stable mixed disulfide intermediate along the reaction pathway.

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Related Citations: 

• The High-Resolution Three-Dimensional Solution Structures of the Oxidized and Reduced States of Human Thioredoxin
  Qin, J.,Clore, G.M.,Gronenborn, A.M.
  (1994) Structure 2: 503
• Solution Structure of Human Thioredoxin in a Mixed Disulfide Intermediate Complex with its Target Peptide from the Transcription Factor NF Kappa B
  Qin, J.,Clore, G.M.,Kennedy, W.M.,Huth, J.R.,Gronenborn, A.M.
  (1995) Structure 3: 289
• High-Resolution Three-Dimensional Structure of Reduced Recombinant Human Thioredoxin in Solution
  Forman-Kay, J.D.,Clore, G.M.,Wingfield, P.T.,Gronenborn, A.M.
  (1991) Biochemistry 30: 2685




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Organizational Affiliation: 

Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0520, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
THIOREDOXIN	A	105	Homo sapiens	Mutation(s): 4  Gene Names: TXN (TRDX, TRX, TRX1)
Find proteins for P10599 (Homo sapiens) Go to Gene View: TXN Go to UniProtKB:  P10599

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
REF-1 PEPTIDE	B	13	Homo sapiens	Mutation(s): 0  Gene Names: APEX1 (APE, APE1, APEX, APX, HAP1, REF1) EC: 3.1.-.-, 4.2.99.18
Find proteins for P27695 (Homo sapiens) Go to Gene View: APEX1 Go to UniProtKB:  P27695

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 35 
• Olderado: 1CQG Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-04-02 
• Released Date: 1996-08-01 
• Deposition Author(s): Clore, G.M., Qin, J., Gronenborn, A.M.

Revision History 

• Version 1.0: 1996-08-01
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance