Crystal structures and kinetics of N-acetylneuraminate lyase from Fusobacterium nucleatumKumar, J.P., Rao, H., Nayak, V., Ramaswamy, S.
(2018) Acta Crystallogr F Struct Biol Commun 74: 725-732
- PubMed: 30387778
- DOI: 10.1107/S2053230X18012992
- Primary Citation of Related Structures:
- PubMed Abstract:
- Structural basis for substrate specificity and mechanism of N-acetyl-D-neuraminic acid lyase from Pasteurella multocida.
Huynh, N.,Aye, A.,Li, Y.,Yu, H.,Cao, H.,Tiwari, V.K.,Shin, D.W.,Chen, X.,Fisher, A.J.
(2013) Biochemistry 52: 8570
N-Acetyl-D-neuraminic acid lyase (NanA) catalyzes the breakdown of sialic acid (Neu5Ac) to N-acetyl-D-mannosamine (ManNAc) and pyruvate. NanA plays a key role in Neu5Ac catabolism in many pathogenic and bacterial commensals where sialic acid is avail ...
N-Acetyl-D-neuraminic acid lyase (NanA) catalyzes the breakdown of sialic acid (Neu5Ac) to N-acetyl-D-mannosamine (ManNAc) and pyruvate. NanA plays a key role in Neu5Ac catabolism in many pathogenic and bacterial commensals where sialic acid is available as a carbon and nitrogen source. Several pathogens or commensals decorate their surfaces with sialic acids as a strategy to escape host innate immunity. Catabolism of sialic acid is key to a range of host-pathogen interactions. In this study, atomic resolution structures of NanA from Fusobacterium nucleatum (FnNanA) in ligand-free and ligand-bound forms are reported at 2.32 and 1.76 Å resolution, respectively. F. nucleatum is a Gram-negative pathogen that causes gingival and periodontal diseases in human hosts. Like other bacterial N-acetylneuraminate lyases, FnNanA also shares the triosephosphate isomerase (TIM)-barrel fold. As observed in other homologous enzymes, FnNanA forms a tetramer. In order to characterize the structure-function relationship, the steady-state kinetic parameters of the enzyme are also reported.
Technologies for the Advancement of Science, Institute for Stem Cell Biology and Regenerative Medicine, NCBS, GKVK Campus, Bangalore, Karnataka 560 065, India.