7X1R | pdb_00007x1r

Cryo-EM structure of human thioredoxin reductase bound by Au

• PDB DOI: https://doi.org/10.2210/pdb7X1R/pdb
• EM Map EMD-32947: EMDB EMDataResource

• Classification: OXIDOREDUCTASE
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2022-02-24 Released: 2022-12-14 
• Deposition Author(s): He, Z.S., Cao, P., Cao, S.H., He, B., Jiang, H.D., Gong, Y., Gao, X.Y.
• Funding Organization(s): National Natural Science Foundation of China (NSFC), National Basic Research Program of China (973 Program)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.90 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Au4 cluster inhibits human thioredoxin reductase activity via specifically binding of Au to Cys189

Du, Z., He, Z., Fan, J., Huo, Y., He, B., Wang, Y., Sun, Q., Niu, W., Zhao, W., Zhao, L., Cao, P., Cao, K., Xia, D., Yuan, Q., Liang, X.J., Jiang, H., Gong, Y., Gao, X.

(2022) Nano Today 47: 101686

• DOI: https://doi.org/10.1016/j.nantod.2022.101686

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 114.2 kDa 
• Atom Count: 7,608 
• Modeled Residue Count: 970 
• Deposited Residue Count: 1,020 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Thioredoxin reductase 1, cytoplasmic	A, B	510	Homo sapiens	Mutation(s): 0  Gene Names: TXNRD1, GRIM12, KDRF EC: 1.8.1.9 (PDB Primary Data), 1.11.1.2 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q16881 (Homo sapiens) Explore Q16881  Go to UniProtKB:  Q16881
PHAROS:  Q16881 GTEx:  ENSG00000198431

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FAD	C [auth A], E [auth B]	FLAVIN-ADENINE DINUCLEOTIDE C27 H33 N9 O15 P2 VWWQXMAJTJZDQX-UYBVJOGSSA-N
AU	D [auth A], F [auth B]	GOLD ION Au ZBKIUFWVEIBQRT-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.90 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2022-12-14 
Deposition Author(s): He, Z.S., Cao, P., Cao, S.H., He, B., Jiang, H.D., Gong, Y., Gao, X.Y.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	21727817
National Natural Science Foundation of China (NSFC)	China	U2067214
National Basic Research Program of China (973 Program)	China	2021YFA1201004

Revision History  

• Version 1.0: 2022-12-14
  Type: Initial release
  
• Version 1.1: 2024-10-30
  Changes: Data collection, Structure summary
• Version 1.2: 2025-07-02
  Changes: Data collection