1IMU

Solution Structure of HI0257, a Ribosome Binding Protein


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 39 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of HI0257, a bacterial ribosome binding protein.

Parsons, L.Eisenstein, E.Orban, J.

(2001) Biochemistry 40: 10979-10986


  • PubMed Abstract: 
  • A novel bacterial ribosome binding protein, protein Y (also known as YfiA), was recently shown to reside at the 30S/50S subunit interface and to stabilize the ribosomal 70S complex against dissociation at low magnesium ion concentrations. We report h ...

    A novel bacterial ribosome binding protein, protein Y (also known as YfiA), was recently shown to reside at the 30S/50S subunit interface and to stabilize the ribosomal 70S complex against dissociation at low magnesium ion concentrations. We report here the three-dimensional NMR structure in solution of a homologue from Haemophilus influenzae, HI0257, that has 64% sequence identity to protein Y. The 107 residue protein has a beta-alpha-beta-beta-beta-alpha folding topology with two parallel alpha-helices packed against the same side of a four-stranded beta-sheet. The closest structural relatives are proteins with the double-stranded RNA-binding domain (dsRBD) motif although there is little (<10%) sequence homology. The most immediate differences between the dsRBD and HI0257 structures are that (1) HI0257 has a larger beta-sheet motif with an extra beta-strand at the N-terminus, (2) the helices are parallel in HI0257 but at an angle of about 30 degrees to each other in the dsRBD, and (3) HI0257 lacks the extended loop commonly seen between the first and second beta-strands of the dsRBD. Further, an analysis of the surface electrostatic potential in HI0257 and the dsRBD family reveals significant differences in the location of contiguous positively (and negatively) charged regions. The structural data, in combination with sequence analysis of HI0257 and its homologues, suggest that the most likely mode of RNA recognition for HI0257 may be distinct from that of the dsRBD family of proteins.


    Organizational Affiliation

    Center for Advanced Research in Biotechnology, University of Maryland Biotechnology Institute, 9600 Gudelsky Drive, Rockville Maryland 20850, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HYPOTHETICAL PROTEIN HI0257
A
107Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd)Gene Names: raiA
Find proteins for P71346 (Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd))
Go to UniProtKB:  P71346
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 39 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest energy 
  • Olderado: 1IMU Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-10-03
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance