Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 54.27 kDa 
• Atom Count: 3930 
• Residue Count: 484 
• Unique protein chains: 2

1YA5

Crystal structure of the titin domains z1z2 in complex with telethonin

• DOI: 10.2210/pdb1YA5/pdb

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


• Deposited: 2004-12-17 Released: 2005-12-20 
• Deposition Author(s): Pinotsis, N., Popov, A., Zou, P., Wilmanns, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.44 Å
• R-Value Free: 0.265 
• R-Value Work: 0.232 
• R-Value Observed: 0.233 

Literature

Palindromic assembly of the giant muscle protein titin in the sarcomeric Z-disk

Zou, P., Pinotsis, N., Lange, S., Song, Y.H., Popov, A., Mavridis, I., Mayans, O.M., Gautel, M., Wilmanns, M.

(2006) Nature 439: 229-233

• PubMed: 16407954 
• DOI: 10.1038/nature04343
• Primary Citation of Related Structures:  
  1YA5


• PubMed Abstract: 
  

The Z-disk of striated and cardiac muscle sarcomeres is one of the most densely packed cellular structures in eukaryotic cells. It provides the architectural framework for assembling and anchoring the largest known muscle filament systems by an extensive network of protein-protein interactions, requiring an extraordinary level of mechanical stability. Here we show, using X-ray crystallography, how the amino terminus of the longest filament component, the giant muscle protein titin, is assembled into an antiparallel (2:1) sandwich complex by the Z-disk ligand telethonin. The pseudosymmetric structure of telethonin mediates a unique palindromic arrangement of two titin filaments, a type of molecular assembly previously found only in protein-DNA complexes. We have confirmed its unique architecture in vivo by protein complementation assays, and in vitro by experiments using fluorescence resonance energy transfer. The model proposed may provide a molecular paradigm of how major sarcomeric filaments are crosslinked, anchored and aligned within complex cytoskeletal networks.

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Related Citations: 

• Crystal structure of the titin domains z1z2 in complex with telethonin
  Pinotsis, N.
  (2003) Thesis --: --

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Organizational Affiliation: 

EMBL-Hamburg c/o DESY, Notkeststrasse 85, D-22603 Hamburg, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
N2B-TITIN ISOFORM	A, B	201	Homo sapiens	Mutation(s): 0  Gene Names: TTN EC: 2.7.11.1
Find proteins for Q8WZ42 (Homo sapiens) Explore Q8WZ42  Go to UniProtKB:  Q8WZ42
NIH Common Fund Data Resources
PHAROS  Q8WZ42 GTEx  ENSG00000155657

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
TELETHONIN	T	90	Homo sapiens	Mutation(s): 4  Gene Names: TCAP
Find proteins for O15273 (Homo sapiens) Explore O15273  Go to UniProtKB:  O15273
NIH Common Fund Data Resources
PHAROS  O15273 GTEx  ENSG00000173991

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	A, B, T	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.44 Å
• R-Value Free: 0.265 
• R-Value Work: 0.232 
• R-Value Observed: 0.233 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.326	α = 90
b = 63.213	β = 90
c = 242.584	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MLPHARE	phasing
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-12-17 
• Released Date: 2005-12-20 
Deposition Author(s): Pinotsis, N., Popov, A., Zou, P., Wilmanns, M.

Revision History 

• Version 1.0: 2005-12-20
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Version format compliance