Molecular dynamics simulations of mouse ferrochelatase variants: what distorts and orientates the porphyrin?

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Borys Szefczyk (Author) Other; Natalia N D S Cordeiro (Author) FCUP; Ricardo Franco (Author) Other; Jose A N F Gomes (Author) FCUP

Journal

Title: Journal of Biological Inorganic Chemistry

Vol. 14

Pages: 1119-1128

ISSN: 0949-8257

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 4 Citations

Scopus - 4 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-003-G7A

DOI: 10.1007/s00775-009-0556-y

Abstract (EN): Molecular dynamics simulations of the wild-type and variant forms of the mouse ferrochelatase in complex with the product (haem) have been performed using the GROMOS96 force field, in the NpT ensemble. Ferrochelatase, the last enzyme in the catalytic pathway of the haem biosynthesis, catalyses the reaction of insertion of a ferrous ion into protoporphyrin IX by distorting the planar geometry of the latter reactant. The simulations presented aim at understanding the role of active-site residues in this catalytic process. Analysis of the simulation trajectories explains the consequences of the mutations introduced and sheds more light on the role of the His209 residue in porphyrin macrocycle distortion. The function of residues coordinating propionate groups of the haem molecule is discussed in terms of stability of the substrate and product complexes.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10