5ZUH

Solution structure of RRM domian of La protein from Trypanosoma brucei


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A telomerase subunit homolog La protein from Trypanosoma brucei plays an essential role in ribosomal biogenesis.

Shan, F.Mei, S.Zhang, J.Zhang, X.Xu, C.Liao, S.Tu, X.

(2019) Febs J. 286: 3129-3147

  • DOI: 10.1111/febs.14853

  • PubMed Abstract: 
  • The autoantigen La protein is an important component of telomerase and a predominantly nuclear phosphoprotein. As a telomerase subunit, La protein associates with the telomerase ribonucleoprotein and influences telomere length. In the reverse transcr ...

    The autoantigen La protein is an important component of telomerase and a predominantly nuclear phosphoprotein. As a telomerase subunit, La protein associates with the telomerase ribonucleoprotein and influences telomere length. In the reverse transcription, La protein stimulates enzymatic activity and increases repeated addition processivity of telomerase. As nuclear phosphoprotein, La protein binds the 3' poly(U)-rich elements of nascent RNA polymerase III transcripts to facilitate its correct folding and maturation. In this work, we identified a La protein homolog (TbLa) from Trypanosoma brucei (T. brucei). We revealed that TbLa interacts with ribosome-associated protein P34/P37, 40S ribosomal protein SA, and 60S ribosomal subunit L5 in T. brucei. In the interactions between TbLa protein and (P34/P37)/L5/SA, RNA recognition motif (RRM) domain of TbLa was indicated to make the major contribution to the processes. We determined the solution structure of TbLa RRM domain. NMR chemical shift perturbations revealed that the positively charged RNA-binding pocket of TbLa RRM domain is responsible for its interaction with ribosomal and ribosome-associated proteins P37/L5/SA. Furthermore, depletion of TbLa affected the maturation process of 5S rRNA and ribosomal assembly, suggesting TbLa protein might play a significant role in the ribosomal biogenesis pathway in T. brucei. Taken together, our results provide a novel insight and structural basis for better understanding the roles of TbLa and RRM domain in ribosomal biogenesis in T. brucei. DATABASE: Structural data are available in the PDB under the accession number 5ZUH.


    Organizational Affiliation

    Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming, China.,Hefei National Laboratory for Physical Science at Microscale, School of Life Science, University of Science and Technology of China, Hefei, China.,School of Life Science, Anhui University, Hefei, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RNA binding protein La-like protein
A
99Trypanosoma bruceiMutation(s): 0 
Find proteins for Q9NIH4 (Trypanosoma brucei)
Go to UniProtKB:  Q9NIH4
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2018-05-07 
  • Released Date: 2019-05-15 
  • Deposition Author(s): Shan, F.Z.
  • This entry supersedes: 5ZOM

Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31270780

Revision History 

  • Version 1.0: 2019-05-15
    Type: Initial release
  • Version 1.1: 2019-09-04
    Type: Data collection, Database references