Padanamides A and B, highly modified linear tetrapeptides produced in culture by a Streptomyces sp. isolated from a marine sediment.
Williams, David E.; Dalisay, Doralyn S.; Patrick, Brian O.; Matainaho, Teatulohi; Andrusiak, Kerry; Deshpande, Raamesh; Myers, Chad L.; Piotrowski, Jeff S.; Boone, Charles; Yoshida, Minoru; Andersen, Raymond J.; Organic letters 13 (2011) 3936–3939; doi:10.1021/ol2014494

data_1502301
_publ_section_title
;
 Padanamides A and B, highly modified linear tetrapeptides produced in
 culture by a Streptomyces sp. isolated from a marine sediment.
;
_journal_issue                   15
_journal_name_full               'Organic letters'
_journal_page_first              3936
_journal_page_last               3939
_journal_paper_doi               10.1021/ol2014494
_journal_volume                  13
_journal_year                    2011
_chemical_absolute_configuration ad
_chemical_formula_sum            'C13 H17 N3 O7'
_chemical_formula_weight         327.30
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.8458(2)
_cell_length_b                   8.1555(3)
_cell_length_c                   27.3235(9)
_cell_measurement_reflns_used    9885
_cell_measurement_temperature    90.0(1)
_cell_measurement_theta_max      65.3
_cell_measurement_theta_min      3.24
_cell_volume                     1525.50(9)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      90.0(1)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'Bruker APEX DUO'
_diffrn_measurement_method       'area detector'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0263
_diffrn_reflns_av_sigmaI/netI    0.0104
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            27362
_diffrn_reflns_theta_full        65.99
_diffrn_reflns_theta_max         65.99
_diffrn_reflns_theta_min         3.23
_exptl_absorpt_coefficient_mu    1.003
_exptl_absorpt_correction_T_max  0.794
_exptl_absorpt_correction_T_min  0.707
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.425
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             688
_exptl_crystal_size_max          0.55
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.145
_refine_diff_density_min         -0.168
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.02(2)
_refine_ls_extinction_coef       0.0051(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.075
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     220
_refine_ls_number_reflns         2602
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.075
_refine_ls_R_factor_all          0.0233
_refine_ls_R_factor_gt           0.0232
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0397P)^2^+0.2758P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0626
_refine_ls_wR_factor_ref         0.0627
_reflns_number_gt                2598
_reflns_number_total             2602
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ol2014494_si_005.cif
_cod_data_source_block           ra049
_cod_original_sg_symbol_H-M      'P 212121'
_cod_database_code               1502301