HEADER MEMBRANE PROTEIN 08-NOV-01 1KCH TITLE ROLE OF CYSTEINE RESIDUES IN STRUCTURAL STABILITY AND TITLE 2 FUNCTION OF A TRANSMEMBRANE HELIX BUNDLE COMPND MOL_ID: 1; COMPND 2 MOLECULE: CARDIAC PHOSPHOLAMBAN; COMPND 3 CHAIN: A, B, C, D, E; COMPND 4 FRAGMENT: PUTATIVE MEMBRANE SPANNING DOMAIN RESIDUES 35-52; COMPND 5 SYNONYM: PLB; COMPND 6 MUTATION: YES SOURCE MOL_ID: 1; SOURCE 2 ORGANISM_SCIENTIFIC: HOMO SAPIENS; SOURCE 3 ORGANISM_COMMON: HUMAN; SOURCE 4 ORGAN: HEART; SOURCE 5 TISSUE: SARCOPLASMIC RETICULUM KEYWDS ATPASE REGULATOR, PHOSPHORYLATION, PENTAMERIC HELIX BUNDLE, KEYWDS 2 LEUCINE-ISOLEUCINE ZIPPER MODEL, ISOSTERIC CYS SUBSTITUTION, KEYWDS 3 ALPHA-AMINO ISOBUTYRIC ACID EXPDTA THEORETICAL MODEL AUTHOR M.G.PATERLINI,C.B.KARIM,D.D.THOMAS REVDAT 1 28-NOV-01 1KCH 0 JRNL AUTH C.B.KARIM,M.G.PATERLINI,L.G.REDDY,G.W.HUNTER, JRNL AUTH 2 G.BARANY,D.D.THOMAS JRNL TITL ROLE OF CYSTEINE RESIDUES IN STRUCTURAL STABILITY JRNL TITL 2 AND FUNCTION OF A TRANSMEMBRANE HELIX BUNDLE. JRNL REF J.BIOL.CHEM. V. 276 38814 2001 JRNL REFN ASTM JBCHA3 US ISSN 0021-9258 REMARK 1 REMARK 1 REFERENCE 1 REMARK 1 AUTH C.B.KARIM,J.D.STAMM,J.KARIM,L.R.JONES,D.D.THOMAS REMARK 1 TITL CYSTEINE REACTIVITY AND OLIGOMERIC STRUCTURES OF REMARK 1 TITL 2 PHOSPHOLAMBAN AND ITS MUTANTS REMARK 1 REF BIOCHEMISTRY V. 37 12074 1998 REMARK 1 REFN ASTM BICHAW US ISSN 0006-2960 REMARK 2 REMARK 2 RESOLUTION. NOT APPLICABLE. REMARK 3 REMARK 3 REFINEMENT. REMARK 3 PROGRAM : AMBER 5.0 REMARK 3 AUTHORS : PEARLMAN, CASE, CALDWELL, ROSS, CHEATHAM, REMARK 3 FERGUSON, SEIBEL, SINGH, WEINER, KOLLMAN REMARK 3 REMARK 3 OTHER REFINEMENT REMARKS: NULL REMARK 4 REMARK 4 1KCH COMPLIES WITH FORMAT V. 2.3, 09-JULY-1998 REMARK 100 REMARK 100 THIS ENTRY HAS BEEN PROCESSED BY RCSB ON 16-NOV-2001. REMARK 100 THE RCSB ID CODE IS RCSB014809. REMARK 220 REMARK 220 EXPERIMENTAL DETAILS REMARK 220 EXPERIMENT TYPE : THEORETICAL MODELLING REMARK 220 REMARK 220 REMARK: THE COORDINATES IN THIS ENTRY REPRESENT A THEORETICAL REMARK 220 MODEL STRUCTURE. THE SEQUENCE MODELLED IS THAT OF THE REMARK 220 PUTATIVE TRANSMEMBRANE REGION AND THEREFORE BEGINS AT REMARK 220 RESIDUE 35 AND ENDS AT RESIDUE 52. THE CYSTEINE RESIDUES REMARK 220 AT POSITIONS 36, 41 AND 47 HAVE BEEN REPLACED WITH ALPHA REMARK 220 -AMINO ISOBUTYRIC ACID (AA3). THE ATOMIC MODEL OF THE REMARK 220 PUTATIVE TRANSMEMBRANE REGION OF PHOSPHOLAMBAN (RESIDUES REMARK 220 35-52) WAS OBTAINED BY FIRST CONSIDERING THE PREVIOUS REMARK 220 THEORETICAL MODEL OF PHOSPHOLAMBAN (PDB ENTRY CODE 1K9N) REMARK 220 BUILT ACCORDING TO THE LEUCINE-ISOLEUCINE ZIPPER MODEL REMARK 220 OF SIMMERMAN ET AL.(H.K.SIMMERMAN, Y.M.KOBAYASHI, REMARK 220 J.M.AUTRY, L.R.JONES, J.BIOL.CHEM. 1996, V.271, 5941). REMARK 220 IN THIS MODEL LEU37, LEU44, LEU51 AND ILE40 ILE47 OCCUPY REMARK 220 THE A AND D POSITIONS, RESPECTIVELY OF THE HEPTADIC REMARK 220 HELICAL REPEAT. THE CYSTEINE SIDE CHAINS WERE THEN REMARK 220 REPLACED WITH THE ISOSTERIC GROUP ALPHA-AMINO ISOBUTYRIC REMARK 220 ACID (AA3). THE MODEL WAS THEN USED AS THE STARTING REMARK 220 POINT FOR SIMULATIONS CARRIED OUT USING AMBER5.0 SOFWARE REMARK 220 PACKAGE (UNIVERSITY OF CALIFORNIA, SAN FRANCISCO). REMARK 220 BEFORE ENERGY MINIMIZATION, SIDE CHAIN ROTAMERS WERE REMARK 220 GENERATED USING THE SOFTWARE PROGRAM SQWRL REMARK 220 (R.L.DUNBRACK, M.KARPLUS, NAT.STRUCT.BIOL. 1994, V.1, REMARK 220 334) TO RELIEVE UNFAVORABLE INTERACTIONS BETWEEN SIDE REMARK 220 CHAINS. THE TEMPLATE WAS ENERGY-MINIMIZED USING A 12- REMARK 220 ANGSTROM NON-BONDED CUTOFF, A DISTANCE-DEPENDENT REMARK 220 DIELECTRIC CONSTANT OF 4R, AND A CONVERGE CRITERION OF REMARK 220 5X10-5 KCAL/MOLE ANGSTROM-2 IN THE ROOT-MEAN SQUARE OF REMARK 220 THE CARTESIAN ELEMENTS OF THE ENERGY GRADIENT. REMARK 220 POSITIONAL CONSTRAINTS WERE IMPOSED ON THE BACKBONE REMARK 220 HEAVY ATOMS USING A HARMONIC POTENTIAL WITH A FORCE REMARK 220 CONSTANT OF 5 KCAL/MOLE ANGSTROM-2. REMARK 225 REMARK 225 THEORETICAL MODEL REMARK 225 THE COORDINATES IN THIS ENTRY REPRESENT A MODEL STRUCTURE. REMARK 225 PROTEIN DATA BANK CONVENTIONS REQUIRE THAT CRYST1 AND REMARK 225 SCALE RECORDS BE INCLUDED, BUT THE VALUES ON THESE REMARK 225 RECORDS ARE MEANINGLESS. REMARK 900 REMARK 900 RELATED ENTRIES REMARK 900 RELATED ID: 1K9N RELATED DB: PDB REMARK 900 MODEL OF THE PENTAMERIC TRANSMEMBRANE DOMAIN OF REMARK 900 PHOSPHOLAMBAN, A REGULATOR OF THE CALCIUM ATPASE SERCA2A DBREF 1KCH A 35 52 UNP P26678 PPLA_HUMAN 35 52 DBREF 1KCH B 35 52 UNP P26678 PPLA_HUMAN 35 52 DBREF 1KCH C 35 52 UNP P26678 PPLA_HUMAN 35 52 DBREF 1KCH D 35 52 UNP P26678 PPLA_HUMAN 35 52 DBREF 1KCH E 35 52 UNP P26678 PPLA_HUMAN 35 52 SEQADV 1KCH AA3 A 36 UNP P26678 CYS 36 ENGINEERED SEQADV 1KCH AA3 A 41 UNP P26678 CYS 41 ENGINEERED SEQADV 1KCH AA3 A 46 UNP P26678 CYS 46 ENGINEERED SEQADV 1KCH AA3 B 36 UNP P26678 CYS 36 ENGINEERED SEQADV 1KCH AA3 B 41 UNP P26678 CYS 41 ENGINEERED SEQADV 1KCH AA3 B 46 UNP P26678 CYS 46 ENGINEERED SEQADV 1KCH AA3 C 36 UNP P26678 CYS 36 ENGINEERED SEQADV 1KCH AA3 C 41 UNP P26678 CYS 41 ENGINEERED SEQADV 1KCH AA3 C 46 UNP P26678 CYS 46 ENGINEERED SEQADV 1KCH AA3 D 36 UNP P26678 CYS 36 ENGINEERED SEQADV 1KCH AA3 D 41 UNP P26678 CYS 41 ENGINEERED SEQADV 1KCH AA3 D 46 UNP P26678 CYS 46 ENGINEERED SEQADV 1KCH AA3 E 36 UNP P26678 CYS 36 ENGINEERED SEQADV 1KCH AA3 E 41 UNP P26678 CYS 41 ENGINEERED SEQADV 1KCH AA3 E 46 UNP P26678 CYS 46 ENGINEERED SEQRES 1 A 18 PHE ABA LEU ILE LEU ILE ABA LEU LEU LEU ILE ABA ILE SEQRES 2 A 18 ILE VAL MET LEU LEU SEQRES 1 B 18 PHE ABA LEU ILE LEU ILE ABA LEU LEU LEU ILE ABA ILE SEQRES 2 B 18 ILE VAL MET LEU LEU SEQRES 1 C 18 PHE ABA LEU ILE LEU ILE ABA LEU LEU LEU ILE ABA ILE SEQRES 2 C 18 ILE VAL MET LEU LEU SEQRES 1 D 18 PHE ABA LEU ILE LEU ILE ABA LEU LEU LEU ILE ABA ILE SEQRES 2 D 18 ILE VAL MET LEU LEU SEQRES 1 E 18 PHE ABA LEU ILE LEU ILE ABA LEU LEU LEU ILE ABA ILE SEQRES 2 E 18 ILE VAL MET LEU LEU MODRES 1KCH ABA A 36 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA A 41 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA A 46 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA B 36 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA B 41 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA B 46 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA C 36 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA C 41 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA C 46 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA D 36 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA D 41 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA D 46 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA E 36 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA E 41 ALA 2-AMINOBUTYRIC ACID MODRES 1KCH ABA E 46 ALA 2-AMINOBUTYRIC ACID HET ABA A 36 13 HET ABA A 41 13 HET ABA A 46 13 HET ABA B 36 13 HET ABA B 41 13 HET ABA B 46 13 HET ABA C 36 13 HET ABA C 41 13 HET ABA C 46 13 HET ABA D 36 13 HET ABA D 41 13 HET ABA D 46 13 HET ABA E 36 13 HET ABA E 41 13 HET ABA E 46 13 HETNAM ABA ALPHA-AMINOBUTYRIC ACID FORMUL 1 ABA 15(C4 H9 N O2) HELIX 1 1 PHE A 35 LEU A 52 1 18 HELIX 2 2 PHE B 35 LEU B 52 1 18 HELIX 3 3 PHE C 35 LEU C 52 1 18 HELIX 4 4 PHE D 35 LEU D 52 1 18 HELIX 5 5 PHE E 35 LEU E 52 1 18 CRYST1 1.000 1.000 1.000 90.00 90.00 90.00 P 1 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 MASTER 67 0 15 5 0 0 0 6 0 0 0 10 END