Inhibition of Fibril Formation by Tyrosine Modification of Diphenylalanine: Crystallographic Insights
Bera, Santu; Jana, Poulami; Maity, Suman K.; Haldar, Debasish; Crystal Growth & Design 14 (2014) 1032–; doi:10.1021/cg4015042

data_4510159
_publ_section_title
;
 Inhibition of Fibril Formation by Tyrosine Modification of
 Diphenylalanine: Crystallographic Insights
;
_journal_issue                   3
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1032
_journal_paper_doi               10.1021/cg4015042
_journal_volume                  14
_journal_year                    2014
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C24 H30 N2 O5'
_chemical_formula_sum            'C24 H30 N2 O5'
_chemical_formula_weight         426.50
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_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                   6.329(5)
_cell_length_b                   17.445(15)
_cell_length_c                   21.917(18)
_cell_measurement_reflns_used    1098
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      19.27
_cell_measurement_theta_min      2.33
_cell_volume                     2420(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0978
_diffrn_reflns_av_sigmaI/netI    0.1540
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            12335
_diffrn_reflns_theta_full        25.54
_diffrn_reflns_theta_max         25.54
_diffrn_reflns_theta_min         1.49
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.985
_exptl_absorpt_correction_T_min  0.981
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.171
_exptl_crystal_density_meas      1.171
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             912
_exptl_crystal_size_max          0.465
_exptl_crystal_size_mid          0.198
_exptl_crystal_size_min          0.184
_refine_diff_density_max         0.291
_refine_diff_density_min         -0.298
_refine_diff_density_rms         0.078
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.002(1)
_refine_ls_extinction_coef       0.034(4)
_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   1.007
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     285
_refine_ls_number_reflns         4490
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.007
_refine_ls_R_factor_all          0.1790
_refine_ls_R_factor_gt           0.0814
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0978P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1844
_refine_ls_wR_factor_ref         0.2291
_reflns_number_gt                2168
_reflns_number_total             4490
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg4015042_si_001.cif
_cod_data_source_block           as
_cod_depositor_comments
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The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      'P2(1)2(1)2(1) '
_cod_database_code               4510159