Crystal structure of chromatin protein alba from hyperthermophilic archaeon pyrococcus horikoshii

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.230 

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Crystal structure and functional analysis of an archaeal chromatin protein Alba from the hyperthermophilic archaeon Pyrococcus horikoshii OT3.

Hada, K.Nakashima, T.Osawa, T.Shimada, H.Kakuta, Y.Kimura, M.

(2008) Biosci Biotechnol Biochem 72: 749-758

  • DOI: https://doi.org/10.1271/bbb.70639
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The crystal structure of the Alba protein (PhoAlba) from a hyperthermophilic archaeon, Pyrococcus horikoshii OT3, was determined at a resolution of 2.8 A. PhoAlba structurally belongs to the alpha/beta proteins and is similar not only to archaeal homologues but also to RNA-binding proteins, including the C-terminal half of initiation factor 3 (IF3-C) from Bacillus stearothermophilus, an Esherichia coli protein implicated in cell division (Yhhp), and an Arabidopsis protein of unknown function. We found by gel shift assay that PhoAlba interacts with both ribonuclease P (RNase P) RNA (PhopRNA) and precursor-tRNA(Tyr) (pre-tRNA(Tyr)) in P. horikoshii. However, the addition of PhoAlba to reconstituted particles composed of PhopRNA and four or five protein subunits had little influence on either the pre-tRNA processing activity or the optimum temperature for the processing activity. These results suggest that PhoAlba contributes little to the catalytic activity of P. horikoshii RNase P.

  • Organizational Affiliation

    Laboratory of Structural Biology, Graduate School of Systems Life Sciences, Kyushu University, 6-10-1 Hakozaki, Fukuoka 812-8581, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA/RNA-binding protein Alba
A, B, C, D
93Pyrococcus horikoshiiMutation(s): 0 
Gene Names: PHS053
Find proteins for O74101 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3))
Explore O74101 
Go to UniProtKB:  O74101
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO74101
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.230 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.262α = 90
b = 51.974β = 90
c = 173.004γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-08-05
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2019-05-22
    Changes: Data collection
  • Version 1.3: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Refinement description