5JOE | pdb_00005joe

Crystal structure of I81 from titin

• PDB DOI: https://doi.org/10.2210/pdb5JOE/pdb

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


• Deposited: 2016-05-02 Released: 2016-08-17 
• Deposition Author(s): Fleming, J., Zhou, T., Bogomolovas, J., Labeit, S., Mayans, O.
• Funding Organization(s): Leducq Foundation

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 
  0.218 (Depositor), 0.221 (DCC) 
• R-Value Work: 
  0.177 (Depositor), 0.181 (DCC) 
• R-Value Observed: 
  0.179 (Depositor) 

Starting Model: experimental

Literature

CARP interacts with titin at a unique helical N2A sequence and at the domain Ig81 to form a structured complex.

Zhou, T., Fleming, J.R., Franke, B., Bogomolovas, J., Barsukov, I., Rigden, D.J., Labeit, S., Mayans, O.

(2016) FEBS Lett 590: 3098-3110

• PubMed: 27531639 
• DOI: https://doi.org/10.1002/1873-3468.12362
• Primary Citation Related Structures: 
  5JOE


• PubMed Abstract: 
  

  The cardiac ankyrin repeat protein (CARP) is up-regulated in the myocardium during cardiovascular disease and in response to mechanical or toxic stress. Stress-induced CARP interacts with the N2A spring region of the titin filament to modulate muscle compliance. We characterize the interaction between CARP and titin-N2A and show that the binding site in titin spans the dual domain UN2A-Ig81. We find that the unique sequence UN2A is not structurally disordered, but that it has a stable, elongated α-helical fold that possibly acts as a constant force spring. Our findings portray CARP/titin-N2A as a structured node and help to rationalize the molecular basis of CARP mechanosensing in the sarcomeric I-band.

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Organizational Affiliation: 
• Department of Biology, University of Konstanz, Germany.
Institute of Integrative Biology, University of Liverpool, UK.
Department of Integrative Pathophysiology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.
Department of Biology, University of Konstanz, Germany. [e-mail].
Institute of Integrative Biology, University of Liverpool, UK. [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content 

• Total Structure Weight: 10.64 kDa 
• Atom Count: 952 
• Modeled Residue Count: 92 
• Deposited Residue Count: 92 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Titin	A	92	Homo sapiens	Mutation(s): 0  Gene Names: TTN EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for Q8WZ42 (Homo sapiens) Explore Q8WZ42  Go to UniProtKB:  Q8WZ42
PHAROS:  Q8WZ42 GTEx:  ENSG00000155657

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	C [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
IPA	B [auth A]	ISOPROPYL ALCOHOL C3 H8 O KFZMGEQAYNKOFK-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free:  0.218 (Depositor), 0.221 (DCC) 
• R-Value Work:  0.177 (Depositor), 0.181 (DCC) 
• R-Value Observed: 0.179 (Depositor) 

Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 115.31	α = 90
b = 115.31	β = 90
c = 52.23	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2016-08-17 
Deposition Author(s): Fleming, J., Zhou, T., Bogomolovas, J., Labeit, S., Mayans, O.

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Funding Organization	Location	Grant Number
Leducq Foundation		--

Revision History  

• Version 1.0: 2016-08-17
  Type: Initial release
  
• Version 1.1: 2016-08-31
  Changes: Database references
• Version 1.2: 2016-10-05
  Changes: Database references
• Version 1.3: 2024-01-10
  Changes: Data collection, Database references, Refinement description