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The Journal of Biochemistry
Year: 2009  |  Volume: 146  |  Issue: 4  |  Page No.: 535 - 540

Crystal Structure of Hypothetical Protein HP0062 (O24902_HELPY) from Helicobacter pylori at 1.65 A Resolution

S. B Jang, A. R Kwon, W. S Son, S. J Park and B. J. Lee    

Abstract:

The HP0062 gene encodes a small acidic protein of 86 amino acids with a theoretical pI of 4.6. The crystal structure of hypothetical protein HP0062 from Helicobacter pylori has been determined at 1.65 Å by molecular-replacement method. The crystallographic asymmetric unit contains dimer, in which HP0062 monomer folds into a helix–hairpin–helix structure. The two protomers are primarily held together by extensive hydrophobic interactions in an antiparallel arrangement, forming a four helix bundle. Aromatic residues located at a or g position in the heptad leucine zipper are not major contributor required for HP0062 dimerization but important for the thermostability of this protein.

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