HEADER PROTEIN BINDING 30-OCT-08 3F2U TITLE CRYSTAL STRUCTURE OF HUMAN CHROMOBOX HOMOLOG 1 (CBX1) COMPND MOL_ID: 1; COMPND 2 MOLECULE: CHROMOBOX PROTEIN HOMOLOG 1; COMPND 3 CHAIN: A; COMPND 4 SYNONYM: HETEROCHROMATIN PROTEIN 1 HOMOLOG BETA, HP1 BETA, MODIFIER 1 COMPND 5 PROTEIN, M31, HETEROCHROMATIN PROTEIN P25, HP1HSBETA, P25BETA; COMPND 6 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: CBX1, CBX; SOURCE 6 EXPRESSION_SYSTEM: ESCHERICHIA COLI; SOURCE 7 EXPRESSION_SYSTEM_TAXID: 562 KEYWDS HUMAN CHROMOBOX HOMOLOG 1, CBX1, STRUCTURAL GENOMICS, STRUCTURAL KEYWDS 2 GENOMICS CONSORTIUM, SGC, CENTROMERE, NUCLEUS, PHOSPHOPROTEIN, KEYWDS 3 PROTEIN BINDING EXPDTA X-RAY DIFFRACTION AUTHOR M.F.AMAYA,M.RAVICHANDRAN,W.TEMPEL,A.K.WERNIMONT,P.LOPPNAU, AUTHOR 2 I.KOZIERADZKI,A.M.EDWARDS,C.H.ARROWSMITH,J.WEIGELT,C.BOUNTRA, AUTHOR 3 A.BOTCHKAREV,J.MIN,H.OUYANG,STRUCTURAL GENOMICS CONSORTIUM (SGC) REVDAT 5 13-JUL-11 3F2U 1 VERSN REVDAT 4 25-AUG-09 3F2U 1 REMARK REVDAT 3 11-AUG-09 3F2U 1 TITLE REVDAT 2 24-FEB-09 3F2U 1 VERSN REVDAT 1 25-NOV-08 3F2U 0 JRNL AUTH M.RAVICHANDRAN,M.F.AMAYA,W.TEMPEL,A.K.WERNIMONT,P.LOPPNAU, JRNL AUTH 2 I.KOZIERADZKI,A.M.EDWARDS,C.H.ARROWSMITH,J.WEIGELT, JRNL AUTH 3 C.BOUNTRA,A.BOTCHKAREV,J.MIN,H.OUYANG JRNL TITL CRYSTAL STRUCTURE OF THE COMPLEX OF HUMAN CHROMOBOX HOMOLOG JRNL TITL 2 1 (CBX1) JRNL REF TO BE PUBLISHED JRNL REFN REMARK 2 REMARK 2 RESOLUTION. 1.80 ANGSTROMS. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : REFMAC 5.2.0019 REMARK 3 AUTHORS : MURSHUDOV,VAGIN,DODSON REMARK 3 REMARK 3 REFINEMENT TARGET : MAXIMUM LIKELIHOOD REMARK 3 REMARK 3 DATA USED IN REFINEMENT. REMARK 3 RESOLUTION RANGE HIGH (ANGSTROMS) : 1.80 REMARK 3 RESOLUTION RANGE LOW (ANGSTROMS) : 27.18 REMARK 3 DATA CUTOFF (SIGMA(F)) : 0.000 REMARK 3 COMPLETENESS FOR RANGE (%) : 96.7 REMARK 3 NUMBER OF REFLECTIONS : 4660 REMARK 3 REMARK 3 FIT TO DATA USED IN REFINEMENT. REMARK 3 CROSS-VALIDATION METHOD : THROUGHOUT REMARK 3 FREE R VALUE TEST SET SELECTION : RANDOM REMARK 3 R VALUE (WORKING + TEST SET) : 0.224 REMARK 3 R VALUE (WORKING SET) : 0.222 REMARK 3 FREE R VALUE : 0.274 REMARK 3 FREE R VALUE TEST SET SIZE (%) : 4.700 REMARK 3 FREE R VALUE TEST SET COUNT : 219 REMARK 3 REMARK 3 FIT IN THE HIGHEST RESOLUTION BIN. REMARK 3 TOTAL NUMBER OF BINS USED : 20 REMARK 3 BIN RESOLUTION RANGE HIGH (A) : 1.79 REMARK 3 BIN RESOLUTION RANGE LOW (A) : 1.84 REMARK 3 REFLECTION IN BIN (WORKING SET) : 286 REMARK 3 BIN COMPLETENESS (WORKING+TEST) (%) : 87.83 REMARK 3 BIN R VALUE (WORKING SET) : 0.1940 REMARK 3 BIN FREE R VALUE SET COUNT : 17 REMARK 3 BIN FREE R VALUE : 0.2250 REMARK 3 REMARK 3 NUMBER OF NON-HYDROGEN ATOMS USED IN REFINEMENT. REMARK 3 PROTEIN ATOMS : 393 REMARK 3 NUCLEIC ACID ATOMS : 0 REMARK 3 HETEROGEN ATOMS : 0 REMARK 3 SOLVENT ATOMS : 28 REMARK 3 REMARK 3 B VALUES. REMARK 3 B VALUE TYPE : LIKELY RESIDUAL REMARK 3 FROM WILSON PLOT (A**2) : NULL REMARK 3 MEAN B VALUE (OVERALL, A**2) : 11.54 REMARK 3 OVERALL ANISOTROPIC B VALUE. REMARK 3 B11 (A**2) : 0.97000 REMARK 3 B22 (A**2) : -1.20000 REMARK 3 B33 (A**2) : 2.82000 REMARK 3 B12 (A**2) : 0.00000 REMARK 3 B13 (A**2) : 1.78000 REMARK 3 B23 (A**2) : 0.00000 REMARK 3 REMARK 3 ESTIMATED OVERALL COORDINATE ERROR. REMARK 3 ESU BASED ON R VALUE (A): 0.160 REMARK 3 ESU BASED ON FREE R VALUE (A): 0.156 REMARK 3 ESU BASED ON MAXIMUM LIKELIHOOD (A): 0.119 REMARK 3 ESU FOR B VALUES BASED ON MAXIMUM LIKELIHOOD (A**2): 7.850 REMARK 3 REMARK 3 CORRELATION COEFFICIENTS. REMARK 3 CORRELATION COEFFICIENT FO-FC : 0.941 REMARK 3 CORRELATION COEFFICIENT FO-FC FREE : 0.922 REMARK 3 REMARK 3 RMS DEVIATIONS FROM IDEAL VALUES COUNT RMS WEIGHT REMARK 3 BOND LENGTHS REFINED ATOMS (A): 402 ; 0.019 ; 0.022 REMARK 3 BOND LENGTHS OTHERS (A): NULL ; NULL ; NULL REMARK 3 BOND ANGLES REFINED ATOMS (DEGREES): 547 ; 1.623 ; 1.958 REMARK 3 BOND ANGLES OTHERS (DEGREES): NULL ; NULL ; NULL REMARK 3 TORSION ANGLES, PERIOD 1 (DEGREES): 50 ; 6.397 ; 5.000 REMARK 3 TORSION ANGLES, PERIOD 2 (DEGREES): 17 ;28.944 ;24.118 REMARK 3 TORSION ANGLES, PERIOD 3 (DEGREES): 62 ;11.622 ;15.000 REMARK 3 TORSION ANGLES, PERIOD 4 (DEGREES): 2 ;13.996 ;15.000 REMARK 3 CHIRAL-CENTER RESTRAINTS (A**3): 61 ; 0.106 ; 0.200 REMARK 3 GENERAL PLANES REFINED ATOMS (A): 304 ; 0.009 ; 0.020 REMARK 3 GENERAL PLANES OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED CONTACTS REFINED ATOMS (A): 147 ; 0.223 ; 0.200 REMARK 3 NON-BONDED CONTACTS OTHERS (A): NULL ; NULL ; NULL REMARK 3 NON-BONDED TORSION REFINED ATOMS (A): 271 ; 0.311 ; 0.200 REMARK 3 NON-BONDED TORSION OTHERS (A): NULL ; NULL ; NULL REMARK 3 H-BOND (X...Y) REFINED ATOMS (A): 24 ; 0.230 ; 0.200 REMARK 3 H-BOND (X...Y) OTHERS (A): NULL ; NULL ; NULL REMARK 3 POTENTIAL METAL-ION REFINED ATOMS (A): NULL ; NULL ; NULL REMARK 3 POTENTIAL METAL-ION OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY VDW REFINED ATOMS (A): 23 ; 0.360 ; 0.200 REMARK 3 SYMMETRY VDW OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY H-BOND REFINED ATOMS (A): 8 ; 0.393 ; 0.200 REMARK 3 SYMMETRY H-BOND OTHERS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY METAL-ION REFINED ATOMS (A): NULL ; NULL ; NULL REMARK 3 SYMMETRY METAL-ION OTHERS (A): NULL ; NULL ; NULL REMARK 3 REMARK 3 ISOTROPIC THERMAL FACTOR RESTRAINTS. COUNT RMS WEIGHT REMARK 3 MAIN-CHAIN BOND REFINED ATOMS (A**2): 260 ; 0.962 ; 1.500 REMARK 3 MAIN-CHAIN BOND OTHER ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 MAIN-CHAIN ANGLE REFINED ATOMS (A**2): 400 ; 1.346 ; 2.000 REMARK 3 SIDE-CHAIN BOND REFINED ATOMS (A**2): 172 ; 2.314 ; 3.000 REMARK 3 SIDE-CHAIN ANGLE REFINED ATOMS (A**2): 147 ; 3.111 ; 4.500 REMARK 3 REMARK 3 ANISOTROPIC THERMAL FACTOR RESTRAINTS. COUNT RMS WEIGHT REMARK 3 RIGID-BOND RESTRAINTS (A**2): NULL ; NULL ; NULL REMARK 3 SPHERICITY; FREE ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 SPHERICITY; BONDED ATOMS (A**2): NULL ; NULL ; NULL REMARK 3 REMARK 3 NCS RESTRAINTS STATISTICS REMARK 3 NUMBER OF DIFFERENT NCS GROUPS : NULL REMARK 3 REMARK 3 TLS DETAILS REMARK 3 NUMBER OF TLS GROUPS : 3 REMARK 3 REMARK 3 TLS GROUP : 1 REMARK 3 NUMBER OF COMPONENTS GROUP : 1 REMARK 3 COMPONENTS C SSSEQI TO C SSSEQI REMARK 3 RESIDUE RANGE : A 1 A 10 REMARK 3 ORIGIN FOR THE GROUP (A): 11.1652 -5.6525 4.8411 REMARK 3 T TENSOR REMARK 3 T11: 0.0964 T22: 0.2011 REMARK 3 T33: 0.0426 T12: 0.0113 REMARK 3 T13: 0.0011 T23: -0.0448 REMARK 3 L TENSOR REMARK 3 L11: 2.7197 L22: 1.6890 REMARK 3 L33: 6.6537 L12: 0.3614 REMARK 3 L13: -1.0421 L23: 0.1937 REMARK 3 S TENSOR REMARK 3 S11: -0.1550 S12: -0.0407 S13: 0.0901 REMARK 3 S21: -0.1473 S22: -0.0452 S23: 0.0269 REMARK 3 S31: 0.0014 S32: -0.3579 S33: 0.2002 REMARK 3 REMARK 3 TLS GROUP : 2 REMARK 3 NUMBER OF COMPONENTS GROUP : 1 REMARK 3 COMPONENTS C SSSEQI TO C SSSEQI REMARK 3 RESIDUE RANGE : A 11 A 38 REMARK 3 ORIGIN FOR THE GROUP (A): 13.4858 2.3474 4.4623 REMARK 3 T TENSOR REMARK 3 T11: 0.1178 T22: 0.1787 REMARK 3 T33: 0.0478 T12: 0.0049 REMARK 3 T13: 0.0124 T23: -0.0461 REMARK 3 L TENSOR REMARK 3 L11: 6.9384 L22: 7.3218 REMARK 3 L33: 2.3102 L12: 6.3289 REMARK 3 L13: -0.1615 L23: -2.0374 REMARK 3 S TENSOR REMARK 3 S11: 0.0571 S12: -0.3646 S13: 0.3240 REMARK 3 S21: -0.1036 S22: -0.2350 S23: 0.2937 REMARK 3 S31: -0.0193 S32: -0.0135 S33: 0.1779 REMARK 3 REMARK 3 TLS GROUP : 3 REMARK 3 NUMBER OF COMPONENTS GROUP : 1 REMARK 3 COMPONENTS C SSSEQI TO C SSSEQI REMARK 3 RESIDUE RANGE : A 39 A 51 REMARK 3 ORIGIN FOR THE GROUP (A): 20.5575 -5.5746 0.9757 REMARK 3 T TENSOR REMARK 3 T11: 0.0578 T22: 0.2014 REMARK 3 T33: 0.2536 T12: -0.0186 REMARK 3 T13: 0.0797 T23: -0.0670 REMARK 3 L TENSOR REMARK 3 L11: 8.5278 L22: 6.0747 REMARK 3 L33: 20.6783 L12: 1.5456 REMARK 3 L13: -4.2866 L23: 1.9474 REMARK 3 S TENSOR REMARK 3 S11: -0.0059 S12: 0.2225 S13: -1.1400 REMARK 3 S21: -0.0032 S22: 0.2687 S23: -0.3010 REMARK 3 S31: -0.5508 S32: 0.5203 S33: -0.2628 REMARK 3 REMARK 3 BULK SOLVENT MODELLING. REMARK 3 METHOD USED : MASK REMARK 3 PARAMETERS FOR MASK CALCULATION REMARK 3 VDW PROBE RADIUS : 1.40 REMARK 3 ION PROBE RADIUS : 0.80 REMARK 3 SHRINKAGE RADIUS : 0.80 REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: HYDROGENS HAVE BEEN ADDED IN THE RIDING REMARK 3 POSITIONS REMARK 4 REMARK 4 3F2U COMPLIES WITH FORMAT V. 3.30, 13-JUL-11 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 10-NOV-08. REMARK 100 THE RCSB ID CODE IS RCSB050076. REMARK 200 REMARK 200 EXPERIMENTAL DETAILS REMARK 200 EXPERIMENT TYPE : X-RAY DIFFRACTION REMARK 200 DATE OF DATA COLLECTION : NULL REMARK 200 TEMPERATURE (KELVIN) : 100 REMARK 200 PH : 7.5 REMARK 200 NUMBER OF CRYSTALS USED : 1 REMARK 200 REMARK 200 SYNCHROTRON (Y/N) : Y REMARK 200 RADIATION SOURCE : APS REMARK 200 BEAMLINE : 23-ID-B REMARK 200 X-RAY GENERATOR MODEL : NULL REMARK 200 MONOCHROMATIC OR LAUE (M/L) : M REMARK 200 WAVELENGTH OR RANGE (A) : 0.97625 REMARK 200 MONOCHROMATOR : NULL REMARK 200 OPTICS : NULL REMARK 200 REMARK 200 DETECTOR TYPE : CCD REMARK 200 DETECTOR MANUFACTURER : MARMOSAIC 300 MM CCD REMARK 200 INTENSITY-INTEGRATION SOFTWARE : NULL REMARK 200 DATA SCALING SOFTWARE : NULL REMARK 200 REMARK 200 NUMBER OF UNIQUE REFLECTIONS : 4818 REMARK 200 RESOLUTION RANGE HIGH (A) : 1.800 REMARK 200 RESOLUTION RANGE LOW (A) : 40.000 REMARK 200 REJECTION CRITERIA (SIGMA(I)) : NULL REMARK 200 REMARK 200 OVERALL. REMARK 200 COMPLETENESS FOR RANGE (%) : NULL REMARK 200 DATA REDUNDANCY : NULL REMARK 200 R MERGE (I) : NULL REMARK 200 R SYM (I) : NULL REMARK 200 FOR THE DATA SET : NULL REMARK 200 REMARK 200 IN THE HIGHEST RESOLUTION SHELL. REMARK 200 HIGHEST RESOLUTION SHELL, RANGE HIGH (A) : NULL REMARK 200 HIGHEST RESOLUTION SHELL, RANGE LOW (A) : NULL REMARK 200 COMPLETENESS FOR SHELL (%) : NULL REMARK 200 DATA REDUNDANCY IN SHELL : NULL REMARK 200 R MERGE FOR SHELL (I) : NULL REMARK 200 R SYM FOR SHELL (I) : NULL REMARK 200 FOR SHELL : NULL REMARK 200 REMARK 200 DIFFRACTION PROTOCOL: SINGLE WAVELENGTH REMARK 200 METHOD USED TO DETERMINE THE STRUCTURE: MOLECULAR REPLACEMENT REMARK 200 SOFTWARE USED: NULL REMARK 200 STARTING MODEL: 3DM1 REMARK 200 REMARK 200 REMARK: NULL REMARK 280 REMARK 280 CRYSTAL REMARK 280 SOLVENT CONTENT, VS (%): 37.86 REMARK 280 MATTHEWS COEFFICIENT, VM (ANGSTROMS**3/DA): 1.98 REMARK 280 REMARK 280 CRYSTALLIZATION CONDITIONS: 30% PEG 400, 0.2M CACL2 0.1M NA HEPES REMARK 280 7.5, VAPOR DIFFUSION, HANGING DROP, TEMPERATURE 298K REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY REMARK 290 SYMMETRY OPERATORS FOR SPACE GROUP: C 1 2 1 REMARK 290 REMARK 290 SYMOP SYMMETRY REMARK 290 NNNMMM OPERATOR REMARK 290 1555 X,Y,Z REMARK 290 2555 -X,Y,-Z REMARK 290 3555 X+1/2,Y+1/2,Z REMARK 290 4555 -X+1/2,Y+1/2,-Z REMARK 290 REMARK 290 WHERE NNN -> OPERATOR NUMBER REMARK 290 MMM -> TRANSLATION VECTOR REMARK 290 REMARK 290 CRYSTALLOGRAPHIC SYMMETRY TRANSFORMATIONS REMARK 290 THE FOLLOWING TRANSFORMATIONS OPERATE ON THE ATOM/HETATM REMARK 290 RECORDS IN THIS ENTRY TO PRODUCE CRYSTALLOGRAPHICALLY REMARK 290 RELATED MOLECULES. REMARK 290 SMTRY1 1 1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 1 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 1 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 2 -1.000000 0.000000 0.000000 0.00000 REMARK 290 SMTRY2 2 0.000000 1.000000 0.000000 0.00000 REMARK 290 SMTRY3 2 0.000000 0.000000 -1.000000 0.00000 REMARK 290 SMTRY1 3 1.000000 0.000000 0.000000 25.52850 REMARK 290 SMTRY2 3 0.000000 1.000000 0.000000 19.53400 REMARK 290 SMTRY3 3 0.000000 0.000000 1.000000 0.00000 REMARK 290 SMTRY1 4 -1.000000 0.000000 0.000000 25.52850 REMARK 290 SMTRY2 4 0.000000 1.000000 0.000000 19.53400 REMARK 290 SMTRY3 4 0.000000 0.000000 -1.000000 0.00000 REMARK 290 REMARK 290 REMARK: NULL 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 SOFTWARE DETERMINED QUATERNARY STRUCTURE: DIMERIC REMARK 350 SOFTWARE USED: PISA REMARK 350 TOTAL BURIED SURFACE AREA: 850 ANGSTROM**2 REMARK 350 SURFACE AREA OF THE COMPLEX: 6520 ANGSTROM**2 REMARK 350 CHANGE IN SOLVENT FREE ENERGY: -7.0 KCAL/MOL REMARK 350 APPLY THE FOLLOWING TO CHAINS: A 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 350 BIOMT1 2 -1.000000 0.000000 0.000000 23.37492 REMARK 350 BIOMT2 2 0.000000 1.000000 0.000000 0.00000 REMARK 350 BIOMT3 2 0.000000 0.000000 -1.000000 25.78687 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 SER A 52 REMARK 465 GLN A 53 REMARK 465 LYS A 54 REMARK 465 THR A 55 REMARK 470 REMARK 470 MISSING ATOM REMARK 470 THE FOLLOWING RESIDUES HAVE MISSING ATOMS (M=MODEL NUMBER; REMARK 470 RES=RESIDUE NAME; C=CHAIN IDENTIFIER; SSEQ=SEQUENCE NUMBER; REMARK 470 I=INSERTION CODE): REMARK 470 M RES CSSEQI ATOMS REMARK 470 GLU A 2 CG CD OE1 OE2 REMARK 470 LYS A 17 CG CD CE NZ REMARK 470 GLU A 30 CG CD OE1 OE2 REMARK 470 GLU A 38 CG CD OE1 OE2 REMARK 470 LEU A 40 CG CD1 CD2 REMARK 470 ASP A 41 CG OD1 OD2 REMARK 470 ASP A 44 CG OD1 OD2 REMARK 470 GLU A 48 CG CD OE1 OE2 REMARK 470 GLN A 51 CG CD OE1 NE2 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 HOH A 57 O HOH A 128 1.90 REMARK 500 REMARK 500 REMARK: NULL REMARK 500 REMARK 500 GEOMETRY AND STEREOCHEMISTRY REMARK 500 SUBTOPIC: CLOSE CONTACTS REMARK 500 REMARK 500 THE FOLLOWING ATOMS THAT ARE RELATED BY CRYSTALLOGRAPHIC REMARK 500 SYMMETRY ARE IN CLOSE CONTACT. AN ATOM LOCATED WITHIN 0.15 REMARK 500 ANGSTROMS OF A SYMMETRY RELATED ATOM IS ASSUMED TO BE ON A REMARK 500 SPECIAL POSITION AND IS, THEREFORE, LISTED IN REMARK 375 REMARK 500 INSTEAD OF REMARK 500. ATOMS WITH NON-BLANK ALTERNATE REMARK 500 LOCATION INDICATORS ARE NOT INCLUDED IN THE CALCULATIONS. REMARK 500 REMARK 500 DISTANCE CUTOFF: REMARK 500 2.2 ANGSTROMS FOR CONTACTS NOT INVOLVING HYDROGEN ATOMS REMARK 500 1.6 ANGSTROMS FOR CONTACTS INVOLVING HYDROGEN ATOMS REMARK 500 REMARK 500 ATM1 RES C SSEQI ATM2 RES C SSEQI SSYMOP DISTANCE REMARK 500 O HOH A 61 O HOH A 61 2656 2.04 REMARK 500 REMARK 500 REMARK: NULL DBREF 3F2U A 2 55 UNP P83916 CBX1_HUMAN 20 73 SEQADV 3F2U GLY A 1 UNP P83916 EXPRESSION TAG SEQRES 1 A 55 GLY GLU TYR VAL VAL GLU LYS VAL LEU ASP ARG ARG VAL SEQRES 2 A 55 VAL LYS GLY LYS VAL GLU TYR LEU LEU LYS TRP LYS GLY SEQRES 3 A 55 PHE SER ASP GLU ASP ASN THR TRP GLU PRO GLU GLU ASN SEQRES 4 A 55 LEU ASP CYS PRO ASP LEU ILE ALA GLU PHE LEU GLN SER SEQRES 5 A 55 GLN LYS THR FORMUL 2 HOH *28(H2 O) HELIX 1 1 SER A 28 ASN A 32 5 5 HELIX 2 2 GLU A 38 LEU A 40 5 3 HELIX 3 3 CYS A 42 GLN A 51 1 10 SHEET 1 A 3 VAL A 5 VAL A 14 0 SHEET 2 A 3 LYS A 17 TRP A 24 -1 O LYS A 23 N GLU A 6 SHEET 3 A 3 THR A 33 PRO A 36 -1 O GLU A 35 N TYR A 20 CRYST1 51.057 39.068 37.832 90.00 137.03 90.00 C 1 2 1 4 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 0.019586 0.000000 0.021025 0.00000 SCALE2 0.000000 0.025596 0.000000 0.00000 SCALE3 0.000000 0.000000 0.038779 0.00000