Received 12 March 2013
aInstitute of Radioisotope Research, St. Marianna University Graduate School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa 216-8511, Japan,bDepartment of Molecular and Behavioral Neuroscience, St. Marianna University Graduate School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa 216-8511, Japan, and cSchool of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
Correspondence e-mail: email@example.com
In the title compound, C10H19N3O4, the N- and C-termini are protonated and ionized, respectively, and the molecule forms a zwitterion. The main chain is in a folded form. In the crystal, the N-terminal -NH3+ group hydrogen bonds to three C-terminal -COO groups and one carbonyl O atom, forming a three-dimensional network. In addition, an N-HO hydrogen bond between the amide groups of the middle glycine residue and a C-HO interaction continue along the a-axis direction. The side chains of the leucyl residues form a hydrophobic region along the a axis.
Data collection: CrystalClear (Rigaku, 2006); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: Mercury (Macrae et al., 2006); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and Yadokari-XG 2009 (Kabuto et al., 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: IS5257 ).
This work was partially supported by the JSPS KAKENHI (grant Nos. 24659548 and 23540478) and MEXT KAKENHI (grant No. 23108003).
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