Abstract
Marine microorganisms represent virtually unlimited sources of novel biological compounds and can
survive extreme conditions. Cellulases, a group of enzymes that are able to degrade cellulosic materials, are in
high demand in various industrial and biotechnological applications, such as in the medical and pharmaceutical
industries, food, fuel, agriculture, and single-cell protein, and as probiotics in aquaculture. The cellulosic biopolymer
is a renewable resource and is a linearly arranged polysaccharide of glucose, with repeating units of
disaccharide connected via β-1,4-glycosidic bonds, which are broken down by cellulase. A great deal of biodiversity
resides in the ocean, and marine systems produce a wide range of distinct, new bioactive compounds
that remain available but dormant for many years. The marine environment is filled with biomass from known
and unknown vertebrates and invertebrate microorganisms, with much potential for use in medicine and biotechnology.
Hence, complex polysaccharides derived from marine sources are a rich resource of microorganisms
equipped with enzymes for polysaccharides degradation. Marine cellulases’ extracts from the isolates are
tested for their functional role in degrading seaweed and modifying wastes to low molecular fragments. They
purify and renew environments by eliminating possible feedstocks of pollution. This review aims to examine
the various types of marine cellulase producers and assess the ability of these microorganisms to produce these
enzymes and their subsequent biotechnological applications.
Keywords:
Cellulase activity, marine enzymes, complex polysaccharides, single-cell protein, polysaccharides degradation, biomass.
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