Macromolecule Content

• Total Structure Weight: 12.02 kDa 
• Atom Count: 842 
• Modelled Residue Count: 103 
• Deposited Residue Count: 103 
• Unique protein chains: 1

1S7A

NMR structure of the La motif of human La protein

• DOI: 10.2210/pdb1S7A/pdb
• BMRB: 6044

• Classification: RNA BINDING PROTEIN, TRANSLATION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-01-29 Released: 2004-04-06 
• Deposition Author(s): Alfano, C., Sanfelice, D., Babon, J., Kelly, G., Jacks, A., Curry, S., Conte, M.R.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Structural analysis of cooperative RNA binding by the La motif and central RRM domain of human La protein.

Alfano, C., Sanfelice, D., Babon, J., Kelly, G., Jacks, A., Curry, S., Conte, M.R.

(2004) Nat Struct Mol Biol 11: 323-329

• PubMed: 15004549 
• DOI: 10.1038/nsmb747
• Primary Citation of Related Structures:  
  1S79, 1S7A


• PubMed Abstract: 
  

The La protein is a conserved component of eukaryotic ribonucleoprotein complexes that binds the 3' poly(U)-rich elements of nascent RNA polymerase III (pol III) transcripts to assist folding and maturation. This specific recognition is mediated by the N-terminal domain (NTD) of La, which comprises a La motif and an RNA recognition motif (RRM). We have determined the solution structures of both domains and show that the La motif adopts an alpha/beta fold that comprises a winged-helix motif elaborated by the insertion of three helices. Chemical shift mapping experiments show that these insertions are involved in RNA interactions. They further delineate a distinct surface patch on each domain-containing both basic and aromatic residues-that interacts with RNA and accounts for the cooperative binding of short oligonucleotides exhibited by the La NTD.

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Related Citations: 

• Resonance assignment and secondary structure of the La motif
  Sanfelice, D., Babon, J., Kelly, G., Curry, S., Conte, M.R.
  () J Biomol NMR 27: 93

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Organizational Affiliation: 

Biophysics Laboratories, Institute of Biomedical and Biomolecular Sciences, University of Portsmouth, St. Michael's Building, Portsmouth PO1 2DT, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Lupus La protein	A	103	Homo sapiens	Mutation(s): 0  Gene Names: SSB
UniProt & NIH Common Fund Data Resources
Find proteins for P05455 (Homo sapiens) Explore P05455  Go to UniProtKB:  P05455
PHAROS:  P05455 GTEx:  ENSG00000138385

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1S7A Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-01-29 
• Released Date: 2004-04-06 
Deposition Author(s): Alfano, C., Sanfelice, D., Babon, J., Kelly, G., Jacks, A., Curry, S., Conte, M.R.

Revision History  

• Version 1.0: 2004-04-06
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance