Crystallization and preliminary X-ray diffraction results of trichorzianine A 1, A peptide with nineteen residues from Trichoderma harzianum

Trichorzianine A 1 is one of the main components of a mixture of related antibiotic peptides (trichorzianines) produced by the fungus Trichoderma harzianum . Good crystals were obtained and allowed X-ray diffraction up to 0·8 A resolution. The space group is orthorhombic, C 222 1 , Z = 8, a = 64·8 (1) A, b = 9·33 (3) A, c = 39·9 (1) A. The solvent content is only 12%, preventing a heavy ion diffusion. So, we are trying to obtain the structure by direct methods.