In this study, the PreNAC (46-56) fibril segment of Alpha-Synuclein (AS) associated with Parkinson's disease was examined using the molecular dynamic simulation method. The first goal of the study was to determine the most suitable force field for future studies on PreNAC. In this regard, we covered seven force fields that were widely used in biomolecule simulations, and it was determined that it is appropriate to treat the AMBER99SB and AMBER99SB-ILDN force fields, mainly CHARMM27 and GROMOS53A6, for future studies. Another goal of the study was to illuminate the conformational properties of the PreNAC interface at the molecular level. One of the most important discoveries observed in this context was that His50 was the most unstable amino acid. In addition, it was observed that amino acid 53, which is known to contain more than one family mutation, sustained high conformational stability. In addition, intersheet electrostatic interactions were the dominant interaction type for the stability of PreNAC interface. As a result, the findings in this study are expected to shed light on future studies of PreNAC of AS and its similar fibril segments.