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: 25.94 kDa 
• Atom Count: 1818 
• Residue Count: 239 
• Unique protein chains: 1

3B8K

Structure of the Truncated Human Dihydrolipoyl Acetyltransferase (E2)

• DOI: 10.2210/pdb3B8K/pdb
• EMDataResource: EMD-1448

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2007-11-01 Released: 2008-01-22 
• Deposition Author(s): Yu, X., Hiromasa, Y., Tsen, H., Stoops, J.K., Roche, T.E., Zhou, Z.H.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 8.80 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structures of the human pyruvate dehydrogenase complex cores: a highly conserved catalytic center with flexible N-terminal domains

Yu, X., Hiromasa, Y., Tsen, H., Stoops, J.K., Roche, T.E., Zhou, Z.H.

(2008) Structure 16: 104-114

• PubMed: 18184588 
• DOI: 10.1016/j.str.2007.10.024
• Primary Citation of Related Structures:  
  3B8K


• PubMed Abstract: 
  

Dihydrolipoyl acetyltransferase (E2) is the central component of pyruvate dehydrogenase complex (PDC), which converts pyruvate to acetyl-CoA. Structural comparison by cryo-electron microscopy (cryo-EM) of the human full-length and truncated E2 (tE2) cores revealed flexible linkers emanating from the edges of trimers of the internal catalytic domains. Using the secondary structure constraints revealed in our 8 A cryo-EM reconstruction and the prokaryotic tE2 atomic structure as a template, we derived a pseudo atomic model of human tE2. The active sites are conserved between prokaryotic tE2 and human tE2. However, marked structural differences are apparent in the hairpin domain and in the N-terminal helix connected to the flexible linker. These permutations away from the catalytic center likely impart structures needed to integrate a second component into the inner core and provide a sturdy base for the linker that holds the pyruvate dehydrogenase for access by the E2-bound regulatory kinase/phosphatase components in humans.

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Organizational Affiliation: 

Department of Pathology and Laboratory Medicine, The University of Texas Medical School at Houston, Houston, TX 77030, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Dihydrolipoyllysine-residue acetyltransferase	A	239	Homo sapiens	Mutation(s): 0  Gene Names: DLAT, DLTA EC: 2.3.1.12
Find proteins for P10515 (Homo sapiens) Explore P10515  Go to UniProtKB:  P10515
NIH Common Fund Data Resources
PHAROS:  P10515 GTEx:  ENSG00000150768

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 8.80 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-11-01 
• Released Date: 2008-01-22 
Deposition Author(s): Yu, X., Hiromasa, Y., Tsen, H., Stoops, J.K., Roche, T.E., Zhou, Z.H.

Revision History 

• Version 1.0: 2008-01-22
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2018-07-18
  Changes: Data collection