*>> All-hydrogen topology for small model compounds used in the << *>> development of the CHARMM22 protein all-hydrogen parameters << *>>>>>>>>>>>>>>>>>>>>>>> July 1997 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< *>>>>>>>> Direct comments to Alexander D. MacKerell Jr. <<<<<<<<<< *>>>>>>>> 410-706-7442 or email: alex,mmiris.ab.umd.edu <<<<<<<<<< * ! references ! !PROTEINS ! !MacKerell, Jr., A. D.; Bashford, D.; Bellott, M.; Dunbrack Jr., R.L.; !Evanseck, J.D.; Field, M.J.; Fischer, S.; Gao, J.; Guo, H.; Ha, S.; !Joseph-McCarthy, D.; Kuchnir, L.; Kuczera, K.; Lau, F.T.K.; Mattos, !C.; Michnick, S.; Ngo, T.; Nguyen, D.T.; Prodhom, B.; Reiher, III, !W.E.; Roux, B.; Schlenkrich, M.; Smith, J.C.; Stote, R.; Straub, J.; !Watanabe, M.; Wiorkiewicz-Kuczera, J.; Yin, D.; Karplus, M. All-atom !empirical potential for molecular modeling and dynamics Studies of !proteins. Journal of Physical Chemistry B, 1998, 102, 3586-3616. 22 1 MASS 1 H 1.00800 H ! polar H MASS 2 HC 1.00800 H ! N-ter H MASS 3 HA 1.00800 H ! nonpolar H MASS 4 HT 1.00800 H ! TIPS3P WATER HYDROGEN MASS 5 HP 1.00800 H ! aromatic H MASS 6 HB 1.00800 H ! backbone H MASS 7 HR1 1.00800 H ! his he1, (+) his HG,HD2 MASS 8 HR2 1.00800 H ! (+) his HE1 MASS 9 HR3 1.00800 H ! neutral his HG, HD2 MASS 10 HS 1.00800 H ! thiol hydrogen MASS 11 HA1 1.00800 H ! for alkene; RHC=CR MASS 12 HA2 1.00800 H ! for alkene; H2C=CR MASS 20 C 12.01100 C ! polar C MASS 21 CA 12.01100 C ! aromatic C MASS 22 CT1 12.01100 C ! aliphatic sp3 C for CH MASS 23 CT2 12.01100 C ! aliphatic sp3 C for CH2 MASS 24 CT3 12.01100 C ! aliphatic sp3 C for CH3 MASS 25 CPH1 12.01100 C ! his CG and CD2 carbons MASS 26 CPH2 12.01100 C ! his CE1 carbon MASS 27 CPT 12.01100 C ! trp C between rings MASS 28 CY 12.01100 C ! TRP C in pyrrole ring MASS 29 CP1 12.01100 C ! tetrahedral C (proline CA) MASS 30 CP2 12.01100 C ! tetrahedral C (proline CB/CG) MASS 31 CP3 12.01100 C ! tetrahedral C (proline CD) MASS 32 CC 12.01100 C ! carbonyl C for sidechains asn,asp,gln,glu MASS 33 CD 12.01100 C ! carbonyl C for none amides, asp,glu,cter MASS 34 CPA 12.01100 C ! heme alpha-C MASS 35 CPB 12.01100 C ! heme beta-C MASS 36 CPM 12.01100 C ! heme meso-C MASS 37 CM 12.01100 C ! heme CO carbon MASS 38 CS 12.01100 C ! thiolate carbon MASS 39 CE1 12.01100 C ! for alkene; RHC=CR MASS 40 CE2 12.01100 C ! for alkene; H2C=CR MASS 50 N 14.00700 N ! proline N MASS 51 NR1 14.00700 N ! neutral his protonated ring nitrogen MASS 52 NR2 14.00700 N ! neutral his unprotonated ring nitrogen MASS 53 NR3 14.00700 N ! charged his ring nitrogen MASS 54 NH1 14.00700 N ! peptide nitrogen MASS 55 NH2 14.00700 N ! amide nitrogen MASS 56 NH3 14.00700 N ! ammonium nitrogen MASS 57 NC2 14.00700 N ! guanidinium nitroogen MASS 58 NY 14.00700 N ! TRP N in pyrrole ring MASS 59 NP 14.00700 N ! Proline ring NH2+ (N-terminal) MASS 60 NPH 14.00700 N ! heme pyrrole N MASS 70 O 15.99900 O ! carbonyl oxygen MASS 71 OB 15.99900 O ! carbonyl oxygen in acetic acid MASS 72 OC 15.99900 O ! carboxylate oxygen MASS 73 OH1 15.99900 O ! hydroxyl oxygen MASS 74 OS 15.99940 O ! ester oxygen MASS 75 OT 15.99940 O ! TIPS3P WATER OXYGEN MASS 76 OM 15.99900 O ! heme CO/O2 oxygen MASS 81 S 32.06000 S ! sulphur MASS 82 SM 32.06000 S ! sulfur C-S-S-C type MASS 83 SS 32.06000 S ! thiolate sulfur MASS 85 HE 4.00260 HE ! helium MASS 86 NE 20.17970 NE ! neon MASS 90 CAL 40.08000 CA ! calcium 2+ MASS 91 ZN 65.37000 ZN ! zinc (II) cation MASS 92 FE 55.84700 FE ! heme iron 56 MASS 99 DUM 0.00000 H ! dummy atom DEFA FIRS NONE LAST NONE AUTO ANGLES DIHE RESI METH 0.00 ! methane GROUP ! order of atoms to match that used in ab initio ATOM CB CT3 -0.56 ! HB1 ATOM HB1 HA 0.14 ! \ ATOM HB2 HA 0.14 ! CB--HB4 ATOM HB3 HA 0.14 ! /| ATOM HB4 HA 0.14 ! HB2 HB3 BOND CB HB1 BOND CB HB2 BOND CB HB3 BOND CB HB4 patc firs none last none RESI TIP3 0.00 ! TIPS3P WATER MODEL, adm jr. GROUP ! Generate noangle nodihedral ATOM OH2 OT -0.834 ATOM H1 HT 0.417 ATOM H2 HT 0.417 BOND OH2 H1 OH2 H2 H1 H2 ! THE LAST BOND IS NEEDED FOR SHAKE ANGLE H1 OH2 H2 END