The enzymic degradation of porphyran

Turvey, J. R.; Christison, J.

doi:10.1042/bj1050317

Cited by 27 publications

(7 citation statements)

References 6 publications

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“…The reason for this is not yet clear. It is possible that the Cytophaga enzyme that degrades porphyran is not identical with agarase, but evidence presented in the following paper (Turvey & Christison, 1967) suggests that this is not the case.…”

Section: Resultsmentioning

confidence: 86%

The hydrolysis of algal galactans by enzymes from a Cytophaga species

Turvey

Christison

1967

Biochemical Journal

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1. Two bacteria were isolated from sea water by the enrichment culture technique, both of which could utilize the galactan sulphate, porphyran, as sole source of carbon. 2. From the cells of one bacterium, classified as a Cytophaga sp., hydrolytic enzymes were isolated. 3. Partial purification of the enzymes is described and some of the properties of the principal enzymes have been studied. 4. The action of the enzymes on several galactan sulphates of red algae suggests that an agarase is present in the mixture.

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Section: Resultsmentioning

confidence: 86%

The hydrolysis of algal galactans by enzymes from a Cytophaga species

Turvey

Christison

1967

Biochemical Journal

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“…First used by Arai (1956, 1957) to confirm the structure of agarobiose (I), several agarases have been purified (Yaphe, 1957;Groleau & Yaphe, 1977;Usov & Miroshnikova, 1975;oung et al, 1978;Momce et al, 1983a;Aoki et al, 1990) and used in the investigation of agar structures from different origins (Turvey & Christison, 1967a, 1967bDuckworth & Turvey, 1969a, 1969bHong et al, 1969;Duckworth & Yaphe, 1971c;Usov & Lvanova, 1981;Morrice et al, 1983b;.…”

Section: Methods In the Chemical Analysis Of Agar And Agarosementioning

confidence: 99%

Chemical structure and physico-chemical properties of agar

Lahaye¹,

1991

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Advances in the chemistry and physico-chemical properties of agar since the review of Araki at the Fifth International Sqweed Symposium in 1965 are discussed. These advances are essentially the result of better separation techniques of the heterogeneous family of polysaccharides known as agar, the use of nuclear magnetic resonance spectroscopy, the use of agarases and, particularly, the use of combinations of the three approaches. Although physico-chemical methods have evolved, particularly molecular-weight determinations, X-ray diffraction data and molecular modelling of agar, correlations between chemical and functional properties of agar and agarose and their gelation mechanisms remain to be studied.

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“…They require a synergistic cleavage of several side group‐removing enzymes which deprotect the polysaccharide chain from functional groups and thereby enable further degradation by the porphyranases. As mentioned above, P450 monooxygenases catalyse demethylation of 6‐ O ‐methyl‐ d ‐galactose – a monosaccharide that replaces d ‐galactose in porphyran in a random manner [90,91,77] . Hence, these P450s are crucial for the complete decomposition of porphyran.…”

Section: Enzymatic Degradation Of Marine Polysaccharidesmentioning

confidence: 98%

Marine Polysaccharides: Occurrence, Enzymatic Degradation and Utilization

2021

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Macroalgae species are fast growing and their polysaccharides are already used as food ingredient due to their properties as hydrocolloids or they have potential high value bioactivity. The degradation of these valuable polysaccharides to access the sugar components has remained mostly unexplored so far. One reason is the high structural complexity of algal polysaccharides, but also the need for suitable enzyme cocktails to obtain oligo‐ and monosaccharides. Among them, there are several rare sugars with high value. Recently, considerable progress was made in the discovery of highly specific carbohydrate‐active enzymes able to decompose complex marine carbohydrates such as carrageenan, laminarin, agar, porphyran and ulvan. This minireview summarizes these achievements and highlights potential applications of the now accessible abundant renewable resource of marine polysaccharides.

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The enzymic degradation of porphyran

Cited by 27 publications

References 6 publications

The hydrolysis of algal galactans by enzymes from a Cytophaga species

The hydrolysis of algal galactans by enzymes from a Cytophaga species

Chemical structure and physico-chemical properties of agar

Marine Polysaccharides: Occurrence, Enzymatic Degradation and Utilization

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