Crystallization and preliminary X-ray analysis of crustacean hyperglycaemic hormone from the kuruma prawn Marsupenaeus japonicus in its weakly active precursor form

Hirotaka Inoue, Naoaki Tsutsui, Chiaki Nagai, Koji Nagata, Masaru Tanokura, Hiromichi Nagasawa

Research output: Contribution to journalArticle

5 Citations (Scopus)


Crustacean hyperglycaemic hormone (CHH) plays a pivotal role in the regulation of glucose metabolism in crustaceans. Pej-SGP-I, one of the six known CHHs in the kuruma prawn Marsupenaeus japonicus, was heterolo-gously expressed in Escherichia coli as an N-terminally His-tagged and Nus-tagged protein in its weakly active precursor form, Pej-SGP-I-Gly, which has an extra glycine residue at the C-terminus. The recombinant peptide was subjected to affinity purification, tag removal, further purification and crystallization by the sitting-drop vapour-diffusion method using NaCl as the main precipitant. The crystals diffracted to 1.95 Å resolution and the space group was assigned as primitive orthorhombic P2 12 12 1, with unit-cell parameters a = 40.19, b = 53.65, c = 53.63 Å. The Matthews coefficient (V M = 1.73 Å 3 Da -1) indicated that the crystal contained two Pej-SGP-I-Gly molecules per asymmetric unit, with a solvent content of 29.0%.

Original languageEnglish
Pages (from-to)1586-1589
Number of pages4
JournalActa Crystallographica Section F: Structural Biology and Crystallization Communications
Issue number12
Publication statusPublished - Dec 2011
Externally publishedYes



  • crustacean hyperglycaemic hormone
  • Marsupenaeus japonicus

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Structural Biology
  • Genetics
  • Condensed Matter Physics

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