2026-05-20 REL PDBe INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY INITIAL_RELEASE REPOSITORY COORDINATE_REPLACEMENT AUTHOR Model completeness
Sidechains without cry-EM density were deleted.
STRUCTURE_SUMMARY atom_site chem_comp_atom chem_comp_bond em_software pdbx_contact_author pdbx_nonpoly_scheme pdbx_struct_conn_angle pdbx_unobs_or_zero_occ_atoms pdbx_validate_close_contact pdbx_validate_torsion refine struct_asym struct_conn struct_sheet_range _pdbx_nonpoly_scheme.auth_mon_id _pdbx_nonpoly_scheme.auth_seq_num _pdbx_nonpoly_scheme.entity_id _pdbx_nonpoly_scheme.mon_id _pdbx_nonpoly_scheme.pdb_mon_id _pdbx_nonpoly_scheme.pdb_seq_num _pdbx_nonpoly_scheme.pdb_strand_id _pdbx_struct_conn_angle.ptnr2_auth_seq_id _pdbx_struct_conn_angle.value _pdbx_validate_torsion.phi _pdbx_validate_torsion.psi _struct_asym.entity_id _struct_conn.pdbx_dist_value _struct_conn.ptnr2_auth_seq_id _struct_sheet_range.beg_auth_comp_id _struct_sheet_range.beg_auth_seq_id _struct_sheet_range.beg_label_comp_id _struct_sheet_range.beg_label_seq_id STRUCTURE_SUMMARY citation citation_author em_admin pdbx_entry_details _citation.country _citation.journal_abbrev _citation.journal_id_CSD _citation.journal_id_ISSN _citation.journal_volume _citation.page_first _citation.page_last _citation.pdbx_database_id_DOI _citation.pdbx_database_id_PubMed _citation.title _citation.year _em_admin.last_update _pdbx_entry_details.has_protein_modification EXPERIMENTAL_SUMMARY citation citation_author em_admin _citation.country _citation.journal_abbrev _citation.journal_id_CSD _citation.journal_id_ISSN _citation.journal_volume _citation.page_first _citation.page_last _citation.pdbx_database_id_DOI _citation.pdbx_database_id_PubMed _citation.title _citation.year _em_admin.last_update PDBe PDBe 2022-04-28 2023-05-10 2023-05-10 2026-05-20 German Research Foundation (DFG) VO 1449_1-1 Germany German Research Foundation (DFG) HA 6322/4-1 Germany native KtrAB complex Vonck J Stautz J potassium transport, membrane protein, transporter Stautz J Griwatz D Kaltwasser S Mehdipour AR Ketter S Thiel C Wunnicke D Schrecker M Mills DJ Hummer G Vonck J Hanelt I A short intrinsically disordered region at KtrB's N-terminus facilitates allosteric regulation of K + channel KtrAB. Nat Commun UK 16 4252 4252 2025 40335548 doi:10.1038/s41467-025-59546-z 2041-1723 EMD-14851 other EM volume
KtrAB complex with a second KtrB dimer at the distal side of the KtrA ring, D2 symmetric
 7zpo FULLOVERLAP EMDB EMD-14851 other EM volume
KtrAB complex with a second KtrB dimer at the distal side of the KtrA ring, D2 symmetric
 EMDB EMD-14859 associated EM volume
native KtrAB complex
 PDB 7zp9 unspecified
model of the above
 native KtrAB complex native KtrAB complex 0 1 2 Vibrio alginolyticus 0.39 Ktr system potassium uptake protein A Vibrio alginolyticus 0.023836919999999998 8 Escherichia coli LEVO MKTGDKQFAVIGLGRFGLAVCKELQDSGSQVLAVDINEDRVKEAAGFVSQAIVANCTHEETVAELKLDDYDMVMIAIGAD VNASILATLIAKEAGVKSVWVKANDRFQARVLQKIGADHIIMPERDMGIRVARKMLDKRVLEFHPLGSGLAMTEFVVGSR LMGKTLSDLALCKVEGVQVLGYKRGPEIIKAPDMSTTLEIGDLIIVVGPQDKLANKLKSL O87952 Ktr system potassium uptake protein B Vibrio alginolyticus 0.04970771499999999 2 Escherichia coli LEVO MTQFHQRGVFYVPDGKRDKAKGGEPRIILLSFLGVLLPSAVLLTLPVFSVSGLSITDALFTATSAISVTGLGVVDTGQHF TLAGKILLMCLMQIGGLGQMTLSAVLLYMFGVRLSLRQQALAKEALGQERQVNLRRLVKKIVTFALVAEAIGFVFLSYRW VPEMGWQTGMFYALFHSISAFNNAGFALFSDSMMSFVNDPLVSFTLAGLFIFGGLGFTVIGDVWRHWRKGFHFLHIHTKI MLIATPLLLLVGTVLFWLLERHNPNTMGSLTTGGQWLAAFFQSASARTAGFNSVDLTQFTQPALLIMIVLMLIGAGSTST GGGIKVSTFAVAFMATWTFLRQKKHVVMFKRTVNWPTVTKSLAIIVVSGAILTTAMFLLMLTEKASFDKVMFETISAFAT VGLTAGLTAELSEPGKYIMIVVMIIGRIGPLTLAYMLARPEPTLIKYPEDTVLTG O87953 ADENOSINE-5'-DIPHOSPHATE 0.000427201 8 ADP MAGNESIUM ION 2.4305e-05 2 MG DODECYL-BETA-D-MALTOSIDE 0.000510615 4 LMT POTASSIUM ION 3.9098e-05 2 K singleParticle particle 8.0 ETHANE FEI VITROBOT MARK IV FEI TITAN KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 2.7 1.2 1.2 2.5 2.5 105000.0 60168.0 FEI TITAN KRIOS AUTOGRID HOLDER NITROGEN GATAN K3 BIOQUANTUM (6k x 4k) 2 3663 40.0 1 326803 PHASE FLIPPING AND AMPLITUDE CORRECTION EMD-3450 C2 3.24 FSC 0.143 CUT-OFF 211602 MAXIMUM LIKELIHOOD MAXIMUM LIKELIHOOD 3 29000.0 emd_14859.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 300 300 300 0 0 0 300 300 300 251.13 251.13 251.13 90.0 90.0 90.0 X Y Z -0.04505912 0.08604302 -0.0002632753 0.00358658 0.8371 0.8371 0.8371 0.015 AUTHOR KtrAB native complex of KtrB dimer with KtrA octamer ring OTHER
The model was refined by phenix.real-space-refine
REAL emd_14859_msk_1.map emd_14859_half_map_2.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 300 300 300 0 0 0 300 300 300 251.13 251.13 251.13 90.0 90.0 90.0 X Y Z -0.015569067 0.03447334 -0.0002640036 0.0022679646 0.8371 0.8371 0.8371 AUTHOR emd_14859_half_map_1.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 300 300 300 0 0 0 300 300 300 251.13 251.13 251.13 90.0 90.0 90.0 X Y Z -0.015438713 0.035777062 -0.00026254673 0.0022583727 0.8371 0.8371 0.8371 AUTHOR