PMID- 15048777 OWN - NLM STAT- MEDLINE DCOM- 20040521 LR - 20131121 IS - 0006-3525 (Print) IS - 0006-3525 (Linking) VI - 73 IP - 5 DP - 2004 Apr 5 TI - Brownian dynamics of interactions between glyceraldehyde-3-phosphate dehydrogenase (GAPDH) mutants and F-actin. PG - 533-41 AB - Brownian dynamics simulations of computer models of GAPDH mutants interacting with F-actin emphasized the electrostatic nature of such interactions, and confirmed the importance of four previously identified lysine residues on the GAPDH structure in these interactions. Mutants were GAPDH models in which one or more of the previously identified lysines had been replaced with alanine. Simulations showed reduced binding of these mutants to F-actin compared to wild-type GAPDH. Binding was significantly reduced by mutating the four lysines; the specific electrostatic interaction energy of the quadruple mutant was -7.3 +/- 1.0 compared to -11.4 +/- 0.5 kcal/mol for the wild enzyme. The BD simulations also reaffirmed the importance of quaternary structure for GAPDH binding F-actin. CI - 2004 Wiley Periodicals, Inc. FAU - Waingeh, Victor F AU - Waingeh VF AD - Department of Chemistry, University of North Dakota, Grand Forks, ND 58202, USA. FAU - Lowe, Stephen L AU - Lowe SL FAU - Thomasson, Kathryn A AU - Thomasson KA LA - eng GR - 2R15 GM 55929-02/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Biopolymers JT - Biopolymers JID - 0372525 RN - 0 (Actins) RN - EC 1.2.1.9 (Glyceraldehyde 3-Phosphate Dehydrogenase (NADP+)) RN - K3Z4F929H6 (Lysine) SB - IM MH - Actins/*chemistry MH - Animals MH - Computer Simulation MH - Diffusion MH - Glyceraldehyde 3-Phosphate Dehydrogenase (NADP+)/*chemistry/genetics MH - Lysine MH - Models, Molecular MH - *Mutation MH - Protein Binding/genetics MH - Protein Structure, Quaternary MH - Rabbits MH - Static Electricity EDAT- 2004/03/30 05:00 MHDA- 2004/05/22 05:00 CRDT- 2004/03/30 05:00 PHST- 2004/03/30 05:00 [pubmed] PHST- 2004/05/22 05:00 [medline] PHST- 2004/03/30 05:00 [entrez] AID - 10.1002/bip.10560 [doi] PST - ppublish SO - Biopolymers. 2004 Apr 5;73(5):533-41. doi: 10.1002/bip.10560.