title: Crystallization and preliminary X-ray crystallographic analysis of extracellular giant hemoglobin from pogonophoran Oligobrachia mashikoi.
abstract: An extracellular giant hemoglobin of Oligobrachia mashikoi, composed of 24 globins with the molecular mass of approximately 400 kDa was crystallized in its intact form. Two crystal forms were obtained by the vapor-diffusion method. Form I crystals obtained using sodium acetate as a precipitant belong to the space group P6(1)22 or P6(5)22, with unit-cell parameters a=112.41, c=621.25 A, and diffracted X-rays beyond 3.0 A resolution. Form II crystals obtained using PEG 10000 as a precipitant belong to the space group R32, with unit-cell parameters a=111.50, c=276.84 A, and diffracted X-rays beyond 2.9 A resolution. The crystals are suitable for X-ray crystallography to determine the supramacromolecular assembly of this giant hemoglobin.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan; RIKEN Harima Institute/SPring-8, Koto 1-1-1, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan.
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Numoto
authors.forename: Taro
authors.initials: T
authors.lastname: Nakagawa
authors.forename: Akiko
authors.initials: A
authors.lastname: Kita
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Sasayama
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Fukumori
authors.forename: Kunio
authors.initials: K
authors.lastname: Miki
mesh_terms: D000818:Animals; D000845:Annelida / Q000737:chemistry*; D003460:Crystallization; D018360:Crystallography, X-Ray / Q000379:methods*; D006454:Hemoglobins / Q000737:chemistry*; D008970:Molecular Weight
chemical_list: D006454:Hemoglobins