Molecular insights into the hydrolysis and transglycosylation of a deep-sea Planctomycetota-derived GH16 family laminarinase
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View abstract on PubMed
Summary
This summary is machine-generated.Researchers characterized PtLam, an exo-laminarinase from deep-sea Planctomycetota. This enzyme efficiently breaks down laminarin and synthesizes new compounds, offering insights into marine carbon cycling and enzyme applications.
Area Of Science
- Biochemistry
- Enzymology
- Marine Microbiology
Background
- Planctomycetota are ubiquitous marine bacteria influencing global nutrient cycles.
- Research on glycoside hydrolases from Planctomycetota is limited.
- Understanding polysaccharide degradation by these microbes is crucial.
Purpose Of The Study
- To elucidate the biochemical and structural properties of PtLam, a laminarinase from deep-sea Planctomycetota.
- To understand the molecular mechanisms of substrate recognition and catalysis.
- To explore the enzyme's potential in synthesizing novel oligosaccharides.
Main Methods
- Biochemical assays to determine enzymatic activity (hydrolysis and transglycosylation).
- Structural analysis of apo-PtLam and its complex with laminarin oligosaccharides using X-ray crystallography.
- Site-directed mutagenesis to identify key residues involved in catalysis and substrate binding.
Main Results
- PtLam functions as an exo-laminarinase, sequentially cleaving glucose units from laminarin.
- The enzyme exhibits significant transglycosylation activity with various sugar alcohols, notably lyxose.
- Structural studies revealed conformational changes upon substrate binding, and identified key residues modulating enzyme activity.
Conclusions
- The study enhances understanding of laminarin cycling by marine Planctomycetota.
- PtLam provides valuable enzymatic tools for synthesizing laminarin hetero-oligosaccharides.
- Findings pave the way for exploring novel polysaccharide hydrolases with practical applications.
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