1XDX | pdb_00001xdx

Solution Structure of the Tctex1 Light Chain From Chlamydomonas Inner Dynein Arm I1

• PDB DOI: https://doi.org/10.2210/pdb1XDX/pdb
• BMRB: 4929

• Classification: CONTRACTILE PROTEIN
• Organism(s): Chlamydomonas reinhardtii
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-09-08 Released: 2005-03-01 
• Deposition Author(s): Wu, H., Maciejewski, M.W., Takebe, S., King, S.M.

---

Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 90 
• Conformers Submitted: 15 
• Selection Criteria: target function,structures with the least restraint violations 

Literature

Solution Structure of the Tctex1 Dimer Reveals a Mechanism for Dynein-Cargo Interactions

Wu, H., Maciejewski, M.W., Takebe, S., King, S.M.

(2005) Structure 13: 213-223

• PubMed: 15698565 
• DOI: https://doi.org/10.1016/j.str.2004.11.013
• Primary Citation Related Structures: 
  1XDX


• PubMed Abstract: 
  

  Tctex1 is a light chain found in both cytoplasmic and flagellar dyneins and is involved in many fundamental cellular activities, including rhodopsin transport within photoreceptors, and may function in the non-Mendelian transmission of t haplotypes in mice. Here, we present the NMR solution structure for the Tctex1 dimer from Chlamydomonas axonemal inner dynein arm I1. Structural comparisons reveal a strong similarity with the LC8 dynein light chain dimer, including formation of a strand-switched beta sheet interface. Analysis of the Tctex1 structure enables the dynein intermediate chain binding site to be identified and suggests a mechanism by which cargo proteins might be attached to this microtubule motor complex. Comparison with the alternate dynein light chain rp3 reveals how the specificity of dynein-cargo interactions mediated by these dynein components is achieved. In addition, this structure provides insight into the consequences of the mutations found in the t haplotype forms of this protein.

---

Organizational Affiliation: 
• Department of Molecular, Microbial, and Structural Biology, 263 Farmington Avenue, Farmington, Connecticut 06030, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 25.36 kDa 
• Atom Count: 1,768 
• Modeled Residue Count: 228 
• Deposited Residue Count: 228 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tctex1 Light Chain protein	A, B	114	Chlamydomonas reinhardtii	Mutation(s): 0  Gene Names: AF039437
UniProt
Find proteins for O64980 (Chlamydomonas reinhardtii) Explore O64980  Go to UniProtKB:  O64980

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 90 
• Conformers Submitted: 15 
• Selection Criteria: target function,structures with the least restraint violations 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-03-01 
Deposition Author(s): Wu, H., Maciejewski, M.W., Takebe, S., King, S.M.

Revision History  

• Version 1.0: 2005-03-01
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-02
  Changes: Database references, Derived calculations
• Version 1.4: 2024-05-22
  Changes: Data collection