Extracellular Pectinase from a Novel Bacterium<i>Chryseobacterium indologenes</i>Strain SD and Its Application in Fruit Juice Clarification

Roy, Karabi; Dey, Sujan; Uddin, Kamal; Barua, Rasel; Hossain, Mohammad Tomal

doi:10.1155/2018/3859752

Cited by 44 publications

(28 citation statements)

References 21 publications

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“…Samples were withdrawn from the fermentation medium every 12 h to explore the fermentation characteristics of high production TMP strain. Cell growth was measured by standard plate count method (Roy et al 2018). The appropriate dilution concentration was chosen, and each sample was run in parallel for three groups to detect the number of viable cells.…”

Section: Methodsmentioning

confidence: 99%

High tetramethylpyrazine production by the endophytic bacterial Bacillus subtilis isolated from the traditional medicinal plant Ligusticum chuanxiong Hort.

et al. 2018

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Tetramethylpyrazine (TMP) with significant protective effects on cardiovascular is the active ingredient of traditional Chinese medicine Rhizoma Chuanxiong (RC). However, many studies have reported the low content of TMP in RC. The endophytes of medicinal plants have the biosynthetic potential to produce the same or similar active metabolites as the host, while few reports were conducted to explore the endophytic bacteria of Ligusticum chuanxiong Hort. and its productive capacity for the important ingredient TMP. The present paper focuses on the isolation and identification of TMP producing endophytic bacteria from RC. In this study, the endophytic bacteria were isolated from the rhizome of Ligusticum chuanxiong Hort. (Umbelliferae). Yeast extract peptone glucose medium (YP) was used for fermentation medium (37 °C, 220 rpm agitation, 144 h). GC and GC/MS were performed to determine and verify the product, the fermentation characteristics were investigated. Morphological observation, physiological and biochemical indexes combining with 16S rRNA sequence analysis were carried out to identify the endophytic bacteria. As a result, five strains of endophytic Bacillus subtilis were firstly isolated and identified from RC, named as LB3, LB3-2-1, LB6-2, LB4, LB5 respectively. All five strains of endophytic B. subtilis produced TMP, while LB5 had the highest production of 10.69 g/L at the 144 h fermentation. This work demonstrates the fact that the endophytic B. subtilis of RC can produce a high level of TMP, indicating the endophytic B. subtilis might play a role in the accumulation of TMP during the growth period of RC.

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Section: Methodsmentioning

confidence: 99%

High tetramethylpyrazine production by the endophytic bacterial Bacillus subtilis isolated from the traditional medicinal plant Ligusticum chuanxiong Hort.

et al. 2018

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“…Presently, no previous biochemical characterization that includes the four enzyme families has been reported. Attention must be given to the high variability due to differences in the way samples are obtained, their preservation, type and concentration of substrates used to determine their activities, as well as the methodology used since these factors can influence the results [26,27]. In this work, we show novel data for the biochemical identification, enzyme activities and HPLC analysis for SVSP, PLA 2 , SVMP and SVH from the three snake Crotalus venoms using the same methodology in each case.…”

Section: Introductionmentioning

confidence: 99%

Snake Venom Hemotoxic Enzymes: Biochemical Comparison between Crotalus Species from Central Mexico

et al. 2019

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Snakebite envenoming is a serious medical problem in different areas of the world. In Latin America, the major prevalence is due to snakes of the family Viperidae, where rattlesnakes (Crotalus) are included. They produce hemotoxic venom which causes bleeding, tissue degradation and necrosis. Each venom has several enzymatic activities, producing different effects in the envenoming, doing its clinical effects difficult to study. Comparison between venom molecules is also difficult when different techniques are used, and therefore, their identification/characterization using the same methodology is necessary. In this work, a general biochemical characterization in snake venom of serine proteases (SVSP), phospholipases A2 (PLA2), metalloproteases (SVMP) and hyaluronidases (SVH) of Crotalus aquilus (Ca), Crotalus polystictus (Cp) and Crotalus molossus nigrescens (Cmn) was done. Differences in protein pattern, enzyme content and enzymatic activities were observed. All the venoms showed high PLA2 activity, high molecular weight SVSP, and a wide variety of SVMP and SVH forms. Ca and Cp showed the highest enzymatic activities of SVMP and SVSP trypsin-like and chymotrypsin-like, whereas Cmn showed the highest SVH and similar PLA2 activity with Ca. All the venoms showed peptides with similar molecular weight to crotamine-like myotoxins. No previous biochemical characterization of C. aquilus has been reported and there are no previous analyses that include these four protein families in these Crotalus venoms.

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“…The procedure of Roy and colleagues [22], with modi cation was employed for the pineapple and orange juice clari cations: 2.5 ml of the each of the juices were evenly dispensed into (0.5, 1.0, 1.5, 2.0, and 2.5ml) labeled test tubes and corresponding volumes of the crude pectinase were added using juice with no crude enzyme as control. The mixtures were swirled to mix, incubated at 50 o C for one hour as described in Barman [23].…”

Section: Application In Clari Cation Of the Juicementioning

confidence: 99%

Effect of Characterized Pectinase Produced From Aspergillus Niger on the Clarification of Orange and Pineapple Juices

Ametefe

Oluwadamilare

Ibidapo

et al. 2021

Preprint

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Background: Owing to the importance of enzyme in fruit processing, demand in quality pectinase has increased. As a result, understanding the properties of locally produced pectinase is very important to encourage promotion in its application in the industry. In this study, Aspergillus niger was isolated, screened for its ability to secrete pectinase. The screened Aspergillus niger was used to produce pectinase using solid state fermentation of orange peels. Results: The effect of temperature and its stability, pH and its stability, substrate concentration, metal ions (Na+, Ca2+, Mg2+, K+, Mn2+, Zn2+, Co2+, and Fe2) were also investigated. The characterized pectinase was applied in the clarification of both orange and pineapple juices. The findings revealed that the enzyme was most effective at 50oC and relatively stable at 20oC activity of about 0.50 mg/ml for both. The optimal pH of 5 at about 0.50 mg/ml, and stabilized pH of 4 with approximately similar activity was also obtained. Of the metals ions investigated, Na+ gave the highest activity of about 0.61 mg/ml compared to ethylenediamine tetraacetic acid (EDTA) which displayed an inhibitory effect. On further optimizing for the concentration of Na+, low concentration of the ion (10 mM) had higher activity of about 0.61 mg/ml. The (Km) and Vmax was about 0.36 mg/ml and 4.39 U/ml. Conclusion: The characterized pectinase clarified both orange and pineapple juices, with enhanced clarification in orange juice compared to pineapple juice. Therefore, the characterized crude pectinase was suitable for application in the clarification of juices.

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Extracellular Pectinase from a Novel BacteriumChryseobacterium indologenesStrain SD and Its Application in Fruit Juice Clarification

Cited by 44 publications

References 21 publications

High tetramethylpyrazine production by the endophytic bacterial Bacillus subtilis isolated from the traditional medicinal plant Ligusticum chuanxiong Hort.

High tetramethylpyrazine production by the endophytic bacterial Bacillus subtilis isolated from the traditional medicinal plant Ligusticum chuanxiong Hort.

Snake Venom Hemotoxic Enzymes: Biochemical Comparison between Crotalus Species from Central Mexico

Effect of Characterized Pectinase Produced From Aspergillus Niger on the Clarification of Orange and Pineapple Juices

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