HEADER MEMBRANE PROTEIN 03-DEC-21 7QEO TITLE HUMAN CONNEXIN 26 AT 55MM HG PCO2, PH7.4: TWO MASKED SUBUNITS, CLASS C COMPND MOL_ID: 1; COMPND 2 MOLECULE: GAP JUNCTION BETA-2 PROTEIN; COMPND 3 CHAIN: A, B; COMPND 4 SYNONYM: CONNEXIN-26,CX26; COMPND 5 ENGINEERED: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGANISM_TAXID: 9606; SOURCE 5 GENE: GJB2; SOURCE 6 EXPRESSION_SYSTEM: SPODOPTERA FRUGIPERDA; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 7108; SOURCE 8 EXPRESSION_SYSTEM_CELL_LINE: SF9; SOURCE 9 EXPRESSION_SYSTEM_PLASMID: PFASTBAC KEYWDS GAP JUNCTION, ION CHANNEL, CARBON DIOXIDE SENSITIVE, MEMBRANE PROTEIN EXPDTA ELECTRON MICROSCOPY AUTHOR D.H.BROTHERTON,A.D.CAMERON,C.G.SAVVA,T.J.RAGAN REVDAT 1 22-JUN-22 7QEO 0 JRNL AUTH D.H.BROTHERTON,C.G.SAVVA,T.J.RAGAN,N.DALE,A.D.CAMERON JRNL TITL CONFORMATIONAL CHANGES AND CO 2 -INDUCED CHANNEL GATING IN JRNL TITL 2 CONNEXIN26. JRNL REF STRUCTURE V. 30 697 2022 JRNL REFN ISSN 0969-2126 JRNL PMID 35276081 JRNL DOI 10.1016/J.STR.2022.02.010 REMARK 2 REMARK 2 RESOLUTION. 2.90 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 SOFTWARE PACKAGES : RELION, EPU, GCTF, COOT, PHENIX REMARK 3 RECONSTRUCTION SCHEMA : NULL REMARK 3 REMARK 3 EM MAP-MODEL FITTING AND REFINEMENT REMARK 3 PDB ENTRY : 2ZW3 REMARK 3 REFINEMENT SPACE : REAL REMARK 3 REFINEMENT PROTOCOL : NULL REMARK 3 REFINEMENT TARGET : NULL REMARK 3 OVERALL ANISOTROPIC B VALUE : NULL REMARK 3 REMARK 3 FITTING PROCEDURE : NULL REMARK 3 REMARK 3 EM IMAGE RECONSTRUCTION STATISTICS REMARK 3 NOMINAL PIXEL SIZE (ANGSTROMS) : NULL REMARK 3 ACTUAL PIXEL SIZE (ANGSTROMS) : NULL REMARK 3 EFFECTIVE RESOLUTION (ANGSTROMS) : 2.900 REMARK 3 NUMBER OF PARTICLES : 18750 REMARK 3 CTF CORRECTION METHOD : PHASE FLIPPING AND AMPLITUDE REMARK 3 CORRECTION REMARK 3 REMARK 3 EM RECONSTRUCTION MAGNIFICATION CALIBRATION: NULL REMARK 3 REMARK 3 OTHER DETAILS: NULL REMARK 4 REMARK 4 7QEO COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY PDBE ON 06-DEC-21. REMARK 100 THE DEPOSITION ID IS D_1292119534. REMARK 245 REMARK 245 EXPERIMENTAL DETAILS REMARK 245 RECONSTRUCTION METHOD : SINGLE PARTICLE REMARK 245 SPECIMEN TYPE : NULL REMARK 245 REMARK 245 ELECTRON MICROSCOPE SAMPLE REMARK 245 SAMPLE TYPE : PARTICLE REMARK 245 PARTICLE TYPE : POINT REMARK 245 NAME OF SAMPLE : TWO SUBUNITS MASKED FROM REMARK 245 DODECAMERIC ASSEMBLY OF HUMAN REMARK 245 CONNEXIN 26: CLASS C REMARK 245 SAMPLE CONCENTRATION (MG ML-1) : 3.50 REMARK 245 SAMPLE SUPPORT DETAILS : NULL REMARK 245 SAMPLE VITRIFICATION DETAILS : 3 MICROLITRES PROTEIN APPLIED REMARK 245 TO GRID, BLOT TIME 6 SECONDS, REMARK 245 IN 10% CO2/90%N2 ATMOSPHERE REMARK 245 SAMPLE BUFFER : NULL REMARK 245 PH : 7.40 REMARK 245 SAMPLE DETAILS : NULL REMARK 245 REMARK 245 DATA ACQUISITION REMARK 245 DATE OF EXPERIMENT : NULL REMARK 245 NUMBER OF MICROGRAPHS-IMAGES : 4003 REMARK 245 TEMPERATURE (KELVIN) : NULL REMARK 245 MICROSCOPE MODEL : FEI TITAN KRIOS REMARK 245 DETECTOR TYPE : GATAN K3 (6K X 4K) REMARK 245 MINIMUM DEFOCUS (NM) : 1000.00 REMARK 245 MAXIMUM DEFOCUS (NM) : 2000.00 REMARK 245 MINIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 MAXIMUM TILT ANGLE (DEGREES) : NULL REMARK 245 NOMINAL CS : 2.70 REMARK 245 IMAGING MODE : BRIGHT FIELD REMARK 245 ELECTRON DOSE (ELECTRONS NM**-2) : 4500.00 REMARK 245 ILLUMINATION MODE : FLOOD BEAM REMARK 245 NOMINAL MAGNIFICATION : 81000 REMARK 245 CALIBRATED MAGNIFICATION : NULL REMARK 245 SOURCE : FIELD EMISSION GUN REMARK 245 ACCELERATION VOLTAGE (KV) : 300 REMARK 245 IMAGING DETAILS : NULL REMARK 247 REMARK 247 ELECTRON MICROSCOPY REMARK 247 THE COORDINATES IN THIS ENTRY WERE GENERATED FROM ELECTRON REMARK 247 MICROSCOPY DATA. PROTEIN DATA BANK CONVENTIONS REQUIRE REMARK 247 THAT CRYST1 AND SCALE RECORDS BE INCLUDED, BUT THE VALUES REMARK 247 ON THESE RECORDS ARE MEANINGLESS EXCEPT FOR THE CALCULATION REMARK 247 OF THE STRUCTURE FACTORS. REMARK 300 REMARK 300 BIOMOLECULE: 1 REMARK 300 SEE REMARK 350 FOR THE AUTHOR PROVIDED AND/OR PROGRAM REMARK 300 GENERATED ASSEMBLY INFORMATION FOR THE STRUCTURE IN REMARK 300 THIS ENTRY. THE REMARK MAY ALSO PROVIDE INFORMATION ON REMARK 300 BURIED SURFACE AREA. REMARK 350 REMARK 350 COORDINATES FOR A COMPLETE MULTIMER REPRESENTING THE KNOWN REMARK 350 BIOLOGICALLY SIGNIFICANT OLIGOMERIZATION STATE OF THE REMARK 350 MOLECULE CAN BE GENERATED BY APPLYING BIOMT TRANSFORMATIONS REMARK 350 GIVEN BELOW. BOTH NON-CRYSTALLOGRAPHIC AND REMARK 350 CRYSTALLOGRAPHIC OPERATIONS ARE GIVEN. REMARK 350 REMARK 350 BIOMOLECULE: 1 REMARK 350 AUTHOR DETERMINED BIOLOGICAL UNIT: DIMERIC REMARK 350 APPLY THE FOLLOWING TO CHAINS: A, B REMARK 350 BIOMT1 1 1.000000 0.000000 0.000000 0.00000 REMARK 350 BIOMT2 1 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 1 0.000000 0.000000 1.000000 0.00000 REMARK 465 REMARK 465 MISSING RESIDUES REMARK 465 THE FOLLOWING RESIDUES WERE NOT LOCATED IN THE REMARK 465 EXPERIMENT. (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN REMARK 465 IDENTIFIER; SSSEQ=SEQUENCE NUMBER; I=INSERTION CODE.) REMARK 465 REMARK 465 M RES C SSSEQI REMARK 465 MET A 1 REMARK 465 ASP A 2 REMARK 465 TRP A 3 REMARK 465 GLY A 4 REMARK 465 LYS A 102 REMARK 465 LYS A 103 REMARK 465 ARG A 104 REMARK 465 LYS A 105 REMARK 465 PHE A 106 REMARK 465 ILE A 107 REMARK 465 LYS A 108 REMARK 465 GLY A 109 REMARK 465 GLU A 110 REMARK 465 ILE A 111 REMARK 465 LYS A 112 REMARK 465 SER A 113 REMARK 465 GLU A 114 REMARK 465 PHE A 115 REMARK 465 LYS A 116 REMARK 465 ASP A 117 REMARK 465 ILE A 118 REMARK 465 GLU A 119 REMARK 465 GLU A 120 REMARK 465 ILE A 121 REMARK 465 LYS A 122 REMARK 465 THR A 123 REMARK 465 GLN A 124 REMARK 465 LYS A 125 REMARK 465 VAL A 126 REMARK 465 ARG A 127 REMARK 465 ILE A 128 REMARK 465 CYS A 218 REMARK 465 SER A 219 REMARK 465 GLY A 220 REMARK 465 LYS A 221 REMARK 465 SER A 222 REMARK 465 LYS A 223 REMARK 465 LYS A 224 REMARK 465 PRO A 225 REMARK 465 VAL A 226 REMARK 465 LEU A 227 REMARK 465 VAL A 228 REMARK 465 PRO A 229 REMARK 465 ARG A 230 REMARK 465 MET B 1 REMARK 465 ASP B 2 REMARK 465 TRP B 3 REMARK 465 GLY B 4 REMARK 465 THR B 5 REMARK 465 LEU B 6 REMARK 465 GLN B 7 REMARK 465 GLU B 101 REMARK 465 LYS B 102 REMARK 465 LYS B 103 REMARK 465 ARG B 104 REMARK 465 LYS B 105 REMARK 465 PHE B 106 REMARK 465 ILE B 107 REMARK 465 LYS B 108 REMARK 465 GLY B 109 REMARK 465 GLU B 110 REMARK 465 ILE B 111 REMARK 465 LYS B 112 REMARK 465 SER B 113 REMARK 465 GLU B 114 REMARK 465 PHE B 115 REMARK 465 LYS B 116 REMARK 465 ASP B 117 REMARK 465 ILE B 118 REMARK 465 GLU B 119 REMARK 465 GLU B 120 REMARK 465 ILE B 121 REMARK 465 LYS B 122 REMARK 465 THR B 123 REMARK 465 GLN B 124 REMARK 465 LYS B 125 REMARK 465 VAL B 126 REMARK 465 ARG B 127 REMARK 465 ILE B 128 REMARK 465 CYS B 218 REMARK 465 SER B 219 REMARK 465 GLY B 220 REMARK 465 LYS B 221 REMARK 465 SER B 222 REMARK 465 LYS B 223 REMARK 465 LYS B 224 REMARK 465 PRO B 225 REMARK 465 VAL B 226 REMARK 465 LEU B 227 REMARK 465 VAL B 228 REMARK 465 PRO B 229 REMARK 465 ARG B 230 REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS IN SAME ASYMMETRIC UNIT REMARK 500 REMARK 500 THE FOLLOWING ATOMS ARE IN CLOSE CONTACT. REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI DISTANCE REMARK 500 O ILE B 71 OH TYR B 158 2.11 REMARK 500 OH TYR A 68 O LYS A 168 2.18 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: TORSION ANGLES REMARK 500 REMARK 500 TORSION ANGLES OUTSIDE THE EXPECTED RAMACHANDRAN REGIONS: REMARK 500 (M=MODEL NUMBER; RES=RESIDUE NAME; C=CHAIN IDENTIFIER; REMARK 500 SSEQ=SEQUENCE NUMBER; I=INSERTION CODE). REMARK 500 REMARK 500 STANDARD TABLE: REMARK 500 FORMAT:(10X,I3,1X,A3,1X,A1,I4,A1,4X,F7.2,3X,F7.2) REMARK 500 REMARK 500 EXPECTED VALUES: GJ KLEYWEGT AND TA JONES (1996). PHI/PSI- REMARK 500 CHOLOGY: RAMACHANDRAN REVISITED. STRUCTURE 4, 1395 - 1400 REMARK 500 REMARK 500 M RES CSSEQI PSI PHI REMARK 500 ILE A 23 -62.00 -103.06 REMARK 500 PRO A 175 -172.63 -67.53 REMARK 500 ILE B 23 -51.63 -126.15 REMARK 500 REMARK 500 REMARK: NULL REMARK 610 REMARK 610 MISSING HETEROATOM REMARK 610 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER; REMARK 610 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; REMARK 610 I=INSERTION CODE): REMARK 610 M RES C SSEQI REMARK 610 LMT A 301 REMARK 610 LMT A 302 REMARK 610 PTY A 303 REMARK 610 LMT B 301 REMARK 610 LMT B 302 REMARK 610 PTY B 303 REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: EMD-13935 RELATED DB: EMDB REMARK 900 HUMAN CONNEXIN 26 AT 55MM HG PCO2, PH7.4: TWO MASKED SUBUNITS, REMARK 900 CLASS C DBREF 7QEO A 1 226 UNP P29033 CXB2_HUMAN 1 226 DBREF 7QEO B 1 226 UNP P29033 CXB2_HUMAN 1 226 SEQADV 7QEO LEU A 227 UNP P29033 EXPRESSION TAG SEQADV 7QEO VAL A 228 UNP P29033 EXPRESSION TAG SEQADV 7QEO PRO A 229 UNP P29033 EXPRESSION TAG SEQADV 7QEO ARG A 230 UNP P29033 EXPRESSION TAG SEQADV 7QEO LEU B 227 UNP P29033 EXPRESSION TAG SEQADV 7QEO VAL B 228 UNP P29033 EXPRESSION TAG SEQADV 7QEO PRO B 229 UNP P29033 EXPRESSION TAG SEQADV 7QEO ARG B 230 UNP P29033 EXPRESSION TAG SEQRES 1 A 230 MET ASP TRP GLY THR LEU GLN THR ILE LEU GLY GLY VAL SEQRES 2 A 230 ASN LYS HIS SER THR SER ILE GLY LYS ILE TRP LEU THR SEQRES 3 A 230 VAL LEU PHE ILE PHE ARG ILE MET ILE LEU VAL VAL ALA SEQRES 4 A 230 ALA LYS GLU VAL TRP GLY ASP GLU GLN ALA ASP PHE VAL SEQRES 5 A 230 CYS ASN THR LEU GLN PRO GLY CYS LYS ASN VAL CYS TYR SEQRES 6 A 230 ASP HIS TYR PHE PRO ILE SER HIS ILE ARG LEU TRP ALA SEQRES 7 A 230 LEU GLN LEU ILE PHE VAL SER THR PRO ALA LEU LEU VAL SEQRES 8 A 230 ALA MET HIS VAL ALA TYR ARG ARG HIS GLU LYS LYS ARG SEQRES 9 A 230 LYS PHE ILE LYS GLY GLU ILE LYS SER GLU PHE LYS ASP SEQRES 10 A 230 ILE GLU GLU ILE LYS THR GLN LYS VAL ARG ILE GLU GLY SEQRES 11 A 230 SER LEU TRP TRP THR TYR THR SER SER ILE PHE PHE ARG SEQRES 12 A 230 VAL ILE PHE GLU ALA ALA PHE MET TYR VAL PHE TYR VAL SEQRES 13 A 230 MET TYR ASP GLY PHE SER MET GLN ARG LEU VAL LYS CYS SEQRES 14 A 230 ASN ALA TRP PRO CYS PRO ASN THR VAL ASP CYS PHE VAL SEQRES 15 A 230 SER ARG PRO THR GLU LYS THR VAL PHE THR VAL PHE MET SEQRES 16 A 230 ILE ALA VAL SER GLY ILE CYS ILE LEU LEU ASN VAL THR SEQRES 17 A 230 GLU LEU CYS TYR LEU LEU ILE ARG TYR CYS SER GLY LYS SEQRES 18 A 230 SER LYS LYS PRO VAL LEU VAL PRO ARG SEQRES 1 B 230 MET ASP TRP GLY THR LEU GLN THR ILE LEU GLY GLY VAL SEQRES 2 B 230 ASN LYS HIS SER THR SER ILE GLY LYS ILE TRP LEU THR SEQRES 3 B 230 VAL LEU PHE ILE PHE ARG ILE MET ILE LEU VAL VAL ALA SEQRES 4 B 230 ALA LYS GLU VAL TRP GLY ASP GLU GLN ALA ASP PHE VAL SEQRES 5 B 230 CYS ASN THR LEU GLN PRO GLY CYS LYS ASN VAL CYS TYR SEQRES 6 B 230 ASP HIS TYR PHE PRO ILE SER HIS ILE ARG LEU TRP ALA SEQRES 7 B 230 LEU GLN LEU ILE PHE VAL SER THR PRO ALA LEU LEU VAL SEQRES 8 B 230 ALA MET HIS VAL ALA TYR ARG ARG HIS GLU LYS LYS ARG SEQRES 9 B 230 LYS PHE ILE LYS GLY GLU ILE LYS SER GLU PHE LYS ASP SEQRES 10 B 230 ILE GLU GLU ILE LYS THR GLN LYS VAL ARG ILE GLU GLY SEQRES 11 B 230 SER LEU TRP TRP THR TYR THR SER SER ILE PHE PHE ARG SEQRES 12 B 230 VAL ILE PHE GLU ALA ALA PHE MET TYR VAL PHE TYR VAL SEQRES 13 B 230 MET TYR ASP GLY PHE SER MET GLN ARG LEU VAL LYS CYS SEQRES 14 B 230 ASN ALA TRP PRO CYS PRO ASN THR VAL ASP CYS PHE VAL SEQRES 15 B 230 SER ARG PRO THR GLU LYS THR VAL PHE THR VAL PHE MET SEQRES 16 B 230 ILE ALA VAL SER GLY ILE CYS ILE LEU LEU ASN VAL THR SEQRES 17 B 230 GLU LEU CYS TYR LEU LEU ILE ARG TYR CYS SER GLY LYS SEQRES 18 B 230 SER LYS LYS PRO VAL LEU VAL PRO ARG HET LMT A 301 9 HET LMT A 302 5 HET PTY A 303 16 HET LMT B 301 3 HET LMT B 302 9 HET PTY B 303 15 HETNAM LMT DODECYL-BETA-D-MALTOSIDE HETNAM PTY PHOSPHATIDYLETHANOLAMINE FORMUL 3 LMT 4(C24 H46 O11) FORMUL 5 PTY 2(C40 H80 N O8 P) FORMUL 9 HOH *4(H2 O) HELIX 1 AA1 THR A 5 ASN A 14 1 10 HELIX 2 AA2 THR A 18 ALA A 39 1 22 HELIX 3 AA3 ALA A 40 GLU A 47 5 8 HELIX 4 AA4 GLY A 59 PHE A 69 1 11 HELIX 5 AA5 SER A 72 HIS A 100 1 29 HELIX 6 AA6 GLY A 130 ASP A 159 1 30 HELIX 7 AA7 ARG A 184 TYR A 217 1 34 HELIX 8 AA8 ILE B 9 VAL B 13 1 5 HELIX 9 AA9 THR B 18 ALA B 39 1 22 HELIX 10 AB1 ALA B 39 TRP B 44 1 6 HELIX 11 AB2 GLY B 45 GLU B 47 5 3 HELIX 12 AB3 GLY B 59 PHE B 69 1 11 HELIX 13 AB4 SER B 72 HIS B 100 1 29 HELIX 14 AB5 GLY B 130 ASP B 159 1 30 HELIX 15 AB6 ARG B 184 TYR B 217 1 34 SHEET 1 AA1 3 VAL A 52 CYS A 53 0 SHEET 2 AA1 3 VAL A 178 PHE A 181 -1 O PHE A 181 N VAL A 52 SHEET 3 AA1 3 LEU A 166 CYS A 169 -1 N CYS A 169 O VAL A 178 SHEET 1 AA2 3 VAL B 52 CYS B 53 0 SHEET 2 AA2 3 VAL B 178 PHE B 181 -1 O PHE B 181 N VAL B 52 SHEET 3 AA2 3 LEU B 166 CYS B 169 -1 N CYS B 169 O VAL B 178 SSBOND 1 CYS A 53 CYS A 180 1555 1555 2.03 SSBOND 2 CYS A 60 CYS A 174 1555 1555 2.03 SSBOND 3 CYS A 64 CYS A 169 1555 1555 2.03 SSBOND 4 CYS B 53 CYS B 180 1555 1555 2.03 SSBOND 5 CYS B 60 CYS B 174 1555 1555 2.03 SSBOND 6 CYS B 64 CYS B 169 1555 1555 2.03 CISPEP 1 TRP A 172 PRO A 173 0 4.85 CISPEP 2 TRP B 172 PRO B 173 0 8.48 CRYST1 1.000 1.000 1.000 90.00 90.00 90.00 P 1 ORIGX1 1.000000 0.000000 0.000000 0.00000 ORIGX2 0.000000 1.000000 0.000000 0.00000 ORIGX3 0.000000 0.000000 1.000000 0.00000 SCALE1 1.000000 0.000000 0.000000 0.00000 SCALE2 0.000000 1.000000 0.000000 0.00000 SCALE3 0.000000 0.000000 1.000000 0.00000