Ion Channel-like Crystallographic Signatures in Modified Guanine‒Potassium/Sodium Interactions
Nagapradeep, N.; Sharma, Suneeta; Verma, Sandeep; Crystal Growth & Design 13 (2013) 455–; doi:10.1021/cg3016518

data_4507378
_publ_section_title
;
 Ion Channel-like Crystallographic Signatures in Modified
 Guanine--Potassium/Sodium Interactions
;
_journal_issue                   2
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              455
_journal_paper_doi               10.1021/cg3016518
_journal_volume                  13
_journal_year                    2013
_chemical_formula_moiety         'C7 H12 K N5 O6'
_chemical_formula_sum            'C7 H12 K N5 O6'
_chemical_formula_weight         301.32
_chemical_name_common            N7-(carboxymethylguanine)+K
_chemical_name_systematic
;
 ?
;
_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                 100.516(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.239(5)
_cell_length_b                   9.884(4)
_cell_length_c                   7.574(3)
_cell_measurement_reflns_used    2936
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.4
_cell_measurement_theta_min      2.4
_cell_volume                     1195.3(8)
_computing_cell_refinement       'SMART 5.628 (Bruker, 2003)'
_computing_data_collection       'SMART 5.628 (Bruker, 2003)'
_computing_data_reduction        'SAINT+ 6.45  (Bruker, 2003)'
_computing_molecular_graphics    'diamond 3.1d'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    Sir92
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 0.978
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0381
_diffrn_reflns_av_sigmaI/netI    0.0466
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            7615
_diffrn_reflns_theta_full        28.40
_diffrn_reflns_theta_max         28.40
_diffrn_reflns_theta_min         2.42
_exptl_absorpt_coefficient_mu    0.479
_exptl_absorpt_correction_T_max  0.9360
_exptl_absorpt_correction_T_min  0.9103
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North et al., 1968)'
_exptl_crystal_density_diffrn    1.674
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             624
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.660
_refine_diff_density_min         -0.798
_refine_diff_density_rms         0.150
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.208
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     196
_refine_ls_number_reflns         2936
_refine_ls_number_restraints     9
_refine_ls_restrained_S_all      1.206
_refine_ls_R_factor_all          0.0796
_refine_ls_R_factor_gt           0.0539
_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^)+(0.0913P)^2^+2.6638P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1347
_refine_ls_wR_factor_ref         0.2098
_reflns_number_gt                2294
_reflns_number_total             2936
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg3016518_si_002.cif
_cod_data_source_block           G7K
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'PSI-SCAN' changed to
'psi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4507378