2NNT | pdb_00002nnt

General structural motifs of amyloid protofilaments

• PDB DOI: https://doi.org/10.2210/pdb2NNT/pdb

• Classification: PROTEIN FIBRIL
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2006-10-24 Released: 2006-11-14 
• Deposition Author(s): Ferguson, N., Becker, J., Tidow, H., Tremmel, S., Sharpe, T.D., Krause, G., Flinders, J., Petrovich, M., Berriman, J., Oschkinat, H., Fersht, A.R.

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Experimental Data Snapshot

• Method: SOLID-STATE NMR
• Conformers Calculated: 30 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Literature

General structural motifs of amyloid protofilaments.

Ferguson, N., Becker, J., Tidow, H., Tremmel, S., Sharpe, T.D., Krause, G., Flinders, J., Petrovich, M., Berriman, J., Oschkinat, H., Fersht, A.R.

(2006) Proc Natl Acad Sci U S A 103: 16248-16253

• PubMed: 17060612 
• DOI: https://doi.org/10.1073/pnas.0607815103
• Primary Citation Related Structures: 
  2NNT


• PubMed Abstract: 
  

  Human CA150, a transcriptional activator, binds to and is co-deposited with huntingtin during Huntington's disease. The second WW domain of CA150 is a three-stranded beta-sheet that folds in vitro in microseconds and forms amyloid fibers under physiological conditions. We found from exhaustive alanine scanning studies that fibrillation of this WW domain begins from its denatured conformations, and we identified a subset of residues critical for fibril formation. We used high-resolution magic-angle-spinning NMR studies on site-specific isotopically labeled fibrils to identify abundant long-range interactions between side chains. The distribution of critical residues identified by the alanine scanning and NMR spectroscopy, along with the electron microscopy data, revealed the protofilament repeat unit: a 26-residue non-native beta-hairpin. The structure we report has similarities to the hairpin formed by the A(beta)((1-40)) protofilament, yet also contains closely packed side-chains in a "steric zipper" arrangement found in the cross-beta spine formed from small peptides from the Sup35 prion protein. Fibrillation of unrelated amyloidogenic sequences shows the common feature of zippered repeat units that act as templates for fiber elongation.

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Organizational Affiliation: 
• Medical Research Council Centre for Protein Engineering, Hills Road, Cambridge CB2 2QH, United Kingdom. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 18.5 kDa 
• Atom Count: 1,020 
• Modeled Residue Count: 124 
• Deposited Residue Count: 160 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transcription elongation regulator 1	A, B, C, D	40	Homo sapiens	Mutation(s): 1  Gene Names: TCERG1, CA150, TAF2S
UniProt & NIH Common Fund Data Resources
Find proteins for O14776 (Homo sapiens) Explore O14776  Go to UniProtKB:  O14776
PHAROS:  O14776 GTEx:  ENSG00000113649

Experimental Data & Validation

Experimental Data

• Method: SOLID-STATE NMR
• Conformers Calculated: 30 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2006-11-14 
Deposition Author(s): Ferguson, N., Becker, J., Tidow, H., Tremmel, S., Sharpe, T.D., Krause, G., Flinders, J., Petrovich, M., Berriman, J., Oschkinat, H., Fersht, A.R.

Revision History  

• Version 1.0: 2006-11-14
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2021-10-20
  Changes: Data collection, Database references
• Version 1.4: 2023-12-27
  Changes: Data collection