X-ray crystal structures of diacetates of 6-s-<i>cis</i> and 6-s-<i>trans</i> astaxanthin and of 7,8-didehydroastaxanthin and 7,8,7',8'-tetradehydroastaxanthin: comparison with free and protein-bound astaxanthins
Bartalucci, Giuditta; Fisher, Stuart; Helliwell, John R.; Helliwell, Madeleine; Liaaen-Jensen, Synnøve; Warren, John E.; Wilkinson, James; Acta Crystallographica Section B 65 (2009) 238–247; doi:10.1107/S0108768109004649

data_2104332
_publ_section_title
;
 X-ray crystal structures of diacetates of 6-s-<i>cis</i> and
 6-s-<i>trans</i> astaxanthin and of 7,8-didehydroastaxanthin and
 7,8,7',8'-tetradehydroastaxanthin: comparison with free and
 protein-bound astaxanthins
;
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              238
_journal_page_last               247
_journal_paper_doi               10.1107/S0108768109004649
_journal_volume                  65
_journal_year                    2009
_chemical_formula_moiety         'C44 H56 O6'
_chemical_formula_sum            'C44 H56 O6'
_chemical_formula_weight         680.89
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 100.700(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.6598(10)
_cell_length_b                   10.1683(10)
_cell_length_c                   18.2940(18)
_cell_measurement_reflns_used    3456
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.17
_cell_measurement_theta_min      2.27
_cell_volume                     1948.4(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL; PLATON (Spek,2003)'
_computing_publication_material  'Bruker SHELXTL; PLATON (Spek,2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0718
_diffrn_reflns_av_sigmaI/netI    0.0523
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            9816
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         1.94
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.161
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.60
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.394
_refine_diff_density_min         -0.214
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.079
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     305
_refine_ls_number_reflns         3425
_refine_ls_number_restraints     73
_refine_ls_restrained_S_all      1.077
_refine_ls_R_factor_all          0.0839
_refine_ls_R_factor_gt           0.0653
_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^)+(0.0489P)^2^+1.5414P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1668
_refine_ls_wR_factor_ref         0.1749
_reflns_number_gt                2506
_reflns_number_total             3425
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ry5026.cif
_cod_data_source_block           s-trans-1
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_Hall     -P2ybc
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               2104332
_cod_database_fobs_code          2104332