Structural highlights
Function
LOX_AERVM Catalyzes the oxidation of (S)-lactate (L-lactate) to pyruvate, with a reduction of O2 to H2O2 (Ref.1, PubMed:27302031, PubMed:25423902, PubMed:2818595, PubMed:8589073, PubMed:26260739). Cannot oxidize D-lactate, glycolate, and D,L-2-hydroxybutanoate (PubMed:2818595). May be involved in the utilization of L-lactate as an energy source for growth (By similarity).[UniProtKB:O33655][1] [2] [3] [4] [5] [UniProtKB:O33655]
Publication Abstract from PubMed
The crystal structure of l-lactate oxidase in complex with l-lactate was solved at a 1.33 A resolution. The electron density of the bound l-lactate was clearly shown and comparisons of the free form and substrate bound complexes demonstrated that l-lactate was bound to the FMN and an additional active site within the enzyme complex. l-lactate interacted with the related side chains, which play an important role in enzymatic catalysis and especially the coupled movement of H265 and D174, which may be essential to activity. These observations not only reveal the enzymatic mechanism for l-lactate binding but also demonstrate the dynamic motion of these enzyme structures in response to substrate binding and enzymatic reaction progression.
Dynamic interactions in the l-lactate oxidase active site facilitate substrate binding at pH4.5.,Furubayashi N, Inaka K, Kamo M, Umena Y, Matsuoka T, Morimoto Y Biochem Biophys Res Commun. 2021 Sep 3;568:131-135. doi:, 10.1016/j.bbrc.2021.06.078. Epub 2021 Jun 30. PMID:34214876[6]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Stoisser T, Rainer D, Leitgeb S, Wilson DK, Nidetzky B. The Ala -to-Gly substitution in Aerococcus viridans L-lactate oxidase revisited: structural consequences at the catalytic site and effect on reactivity with O and other electron acceptors. FEBS J. 2014 Nov 25. doi: 10.1111/febs.13162. PMID:25423902 doi:https://dx.doi.org/10.1111/febs.13162
- ↑ Stoisser T, Klimacek M, Wilson DK, Nidetzky B. Speeding up the product release: a second-sphere contribution from Tyr191 to the reactivity of L-lactate oxidase revealed in crystallographic and kinetic studies of site-directed variants. FEBS J. 2015 Aug 11. doi: 10.1111/febs.13409. PMID:26260739 doi:https://dx.doi.org/10.1111/febs.13409
- ↑ Stoisser T, Brunsteiner M, Wilson DK, Nidetzky B. Conformational flexibility related to enzyme activity: evidence for a dynamic active-site gatekeeper function of Tyr(215) in Aerococcus viridans lactate oxidase. Sci Rep. 2016 Jun 15;6:27892. doi: 10.1038/srep27892. PMID:27302031 doi:https://dx.doi.org/10.1038/srep27892
- ↑ Duncan JD, Wallis JO, Azari MR. Purification and properties of Aerococcus viridans lactate oxidase. Biochem Biophys Res Commun. 1989 Oct 31;164(2):919-26. PMID:2818595 doi:10.1016/0006-291x(89)91546-5
- ↑ Maeda-Yorita K, Aki K, Sagai H, Misaki H, Massey V. L-lactate oxidase and L-lactate monooxygenase: mechanistic variations on a common structural theme. Biochimie. 1995;77(7-8):631-42. PMID:8589073 doi:10.1016/0300-9084(96)88178-8
- ↑ Furubayashi N, Inaka K, Kamo M, Umena Y, Matsuoka T, Morimoto Y. Dynamic interactions in the l-lactate oxidase active site facilitate substrate binding at pH4.5. Biochem Biophys Res Commun. 2021 Sep 3;568:131-135. PMID:34214876 doi:10.1016/j.bbrc.2021.06.078
