• Food Science and Biotechnology
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• 제15권4호
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• pp.647-649
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• 2006

Mevinolin, a fungal metabolite, is a potent inhibitor of 3-hydroxy-methyl-3-glutaryl-coenzyme A (HMG-CoA) reductase, the rate-controlling enzyme in cholesterol biosynthesis. In this investigation, the optimum factors for mevinolin production by Monascus pilosus IFO 480 in soymeal fermentation were studied. The highest yield of mevinolin, 2.82 mg mevinolin per g dry weight, without citrinin (a toxic fungal secondary metabolite) was obtained after 21 days of fermentation at $30^{\circ}C$ at 65% moisture content, particle size 0.6-0.9 mm, and initial substrate pH of 6.0. Mevinolin was present in the fermentation substrate predominantly in the hydroxycarboxylate form (open lactone, 92.1-97.3%), which is currently being used as a hypocholesterolemic agent.

• Food Science and Biotechnology
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• 제16권3호
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• pp.451-456
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• 2007

The potential antioxidant activities of methanolic extracts from soybean and rice fermented with Monascus sp. were investigated. M. pilosus IFO 480 and M. anka IFO 478 were screened as a suitable strain to promote the antioxidant activities in soybean- and rice- fermentation. The methanol extracts from soybean and rice after fermenting for 20 days at $30^{\circ}C$ resulted in a significant increase in the antioxidant capacities expressed as radical (ABTS and DPPH) scavenging assay and peroxidation inhibition (%) by thiocyanate method and increased (p<0.01) by a 2.6 to 3.1-fold compared with those of the unfermented products. The average antioxidant potentials of Monascus-fermented soybean extracts (MFSE) were significantly (p<0.01) stronger than Monascus-fermented rice extracts (MFRE). A linear correlations between free radical scavenging activity of MFSE and the total phenolics content (r=0.84) and total flavonoids content (r=0.81) were observed. These results indicated that MFSE exhibited stronger (p<0.01) antioxidant activity and contained significantly higher levels (p<0.05) of phenolics than MFRE.

• Food Science and Biotechnology
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• 제15권5호
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• pp.814-816
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• 2006

Monacolin K (MK) was produced on soybean using Monascus ruber GM011 by a two-stage-fermentation process. The optimal temperature was identified as $28^{\circ}C$. Higher yield was obtained by multiple-level-temperature cultivation than by single-level-temperature cultivation. The highest yield of total MK, 4.810 mg/g dry soybean product, was attained after 30 days of solid-state fermentation. No citrinin could be detected in the fermented soybean.

• Journal of Microbiology and Biotechnology
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• 제29권6호
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• pp.897-904
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• 2019

Monascus purpureus recombinant mppC and mpp7 knockout strains were subjected to extractive fermentation in the context of azaphilone pigment production. Inclusion of Diaion HP-20 resin resulted in the selective production of unreduced azaphilone congeners, in addition to the early intermediate FK17-P2a, from ${\Delta}mppC$ and ${\Delta}mpp7$ strains that would otherwise mainly produce reduced congeners. Structural determination of two novel unreduced azaphilones from the ${\Delta}mpp7$ strain was accomplished. The unreduced azaphilone compound was converted into the cognate reduced congener in recombinant M. purpureus strains, demonstrating its intermediate role in azaphilone biosynthesis. This study demonstrates the possibility that extractive fermentation with Diaion HP-20 resin can be used to obtain cryptic azaphilone metabolites.

• 한국미생물·생명공학회지
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• 제30권3호
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• pp.253-257
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• 2002

쌀대신에 보리를 이용한 Monascus 고상배양의 기본적인 발효 특성을 연구함을 통하여, 대규모 고상배양 시스템을 통한 천연 적색색소의 생산 가능성을 검토하고자 하였다. 색소의 생산은 고상배양 3일후부터 6일까지 꾸준한 증가추세를 나타내었다. 종균의 접종량이 6∼8%사이일 경우에는 배양후 60시간만에 색소생산이 시작되었으며, 접종량이 5%이하일 경우에는 색소생산이 70시간 이후로 늦어지는 것으로 나타났다. 보리 배지를 30∼40분 동안 증자할 경우에는 색소 발현 시점이 45시간 내외로 단축되었으며, 증자시간이 20분 이하일 경우에는 배지의 불충분한 호화로 인하여 색소생산 시점이 길어졌다. 공기공급량이 0.6∼0.8 vvm사이에서 홍국균의 생장 및 색소의 생산이 활발히 일어났고, 고상배지의 초기 pH를 6으로 조절했을 때 균사성장과 색소발현 능력이 가장 우수하였다 한편 고상배양으로 7일동안 발효한 홍국보리를 사용하여 식중독미생물에 대한 항균여부를 확인한 결과, Escherichia coli, Salmonella 수Phimurium의 생장을 저해함을 확인하였다. 이상과 같이, 보리를 원료로 한 대규모 고상발효 시스템을 활용함으로써 Monascus sp. 유래의 천연색소 및 대사산물의 대량생산 가능성을 확인하였다.

• 한국식품과학회지
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• 제47권3호
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• pp.409-412
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• 2015

Monascus pilosus KCCM 60084를 백태와 서리태에 각각 접종시켜 $30^{\circ}C$에서 발효한 후, 홍국발효 콩에 함유된 미량의 생리활성물질에 대한 영향을 측정하였다. 천연 스타틴 성분인 mevinolin은 발효 전의 미 검출에서 홍국 발효 20일 후에 건조시료 g당(${\mu}g/g$ DW) 최대 $568.18{\mu}g$ 생산하였고, CoQ10의 함량은 발효전의 농도에 비해 발효 20일 후에 백태와 서리태 모두 2배 이상 증가하여 각각 $65.59{\pm}9.53$과 $54.92{\pm}5.27{\mu}g$으로 나타났다. 토코페롤 함량은 홍국발효에 의해 뚜렷한 변화가 관찰되지 않았다. 발효 전의 백태에 함유된 총 토코페롤 함량은 $312.87{\mu}g$으로 서리태의 $256.76{\mu}g$ 보다 약 22% 더 높았으며(p<0.05), 가장 많이 함유된 토코페롤 종류는 ${\gamma}$-토코페롤로 전체 농도의 약 55%을 차지 하였다. 따라서 홍국발효는 콩의 메비놀린과 CoQ10 성분의 농도를 발효과정을 통해 변화시키는 것으로 나타났다.

• 한국식품과학회지
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• 제32권5호
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• pp.1114-1121
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• 2000

된장제조 시 사용하는 황국의 10, 20, 30%를 홍국으로 대체하여 된장을 제조하고, 이를 숙성시키면서 특성의 변화를 비교하였다. 색도 중 L(lightness)값과 b(yellowness)값 및 C(Chroma,채도)값은 모두 숙성 초기에는 대조구된장이 홍국이 첨가된 된장에 비해 높았고, 홍국의 첨가량이 많을수록 낮은 값을 나타내었다. 그러나 이 중 L 값과 C 값은 숙성이 진행되면서 유의적인 차이가 없다가 숙성 말기에는 초기와는 달리 홍국의 첨가량이 많을수록 높게 나타났다. 또한 홍국의 색소로 인해 담금 초기부터 숙성말기 까지 계속 홍국의 첨가량이 많을수록 a(redness)값은 유의적으로 높았고 h(hue angle value, 색상)값은 유의적으로 낮았다. 아미노태 질소는 담금 후 숙성 전반기에 급격히 증가하였고, 담금 직후에는 대조구된장이 홍국된장에 비해 유의적으로 함량이 높았으나 숙성이 진행되면서 45일 이후에는 모든 된장에서 차이가 없어졌다. 환원당 함량과 유리 아미노산 및 peptide 함량 또한 초기에는 대조구된장이 홍국된장에 비해 유의적으로 높았으나, 숙성이 진행될수록 홍국된장의 함량이 증가하여 숙성 60일째에는 모든 군에서 유의적인 차이가 나타나지 않았다. Protease 활성은 숙성 전기간에 걸쳐 대조구된장이 홍국된장에 비해 높게 나타났으나 60일간 숙성시킨 된장의 관능검사 결과 모든 실험구에서 품질의 차이가 나타나지 않아 된장 제조 시 황국의 30%까지를 홍국으로 대체하는 것이 가능할 것으로 사료되었다.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2002년도 생물공학의 동향 (X)
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• pp.129-130
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• 2002

Monascus pigment was produced by Monascus species. During Monascus fermentation, citrinin, the mycotoxin was produced with pigments. Citrinin can become a problem for use of monascus pigment as a food colorant. We found adding of S. cerevisiae filtrate during Monascus cultivation could enhance production of red pigment whereas it could reduce citrinin level. When we added the filtrate at 24 hand 48 h, respectively, pigment production increased about 400% and citrinin concentration decreased to 30%. In a glucose medium, there was no special effect by addition of filtrate. On the other hand, the effect was striking in a sucrose medium.

• Journal of Microbiology and Biotechnology
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• 제30권2호
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• pp.178-186
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• 2020

Licorice (Glycyrrhiza uralensis) contains several compounds that have been reported to alleviate menopausal symptoms via interacting with estrogen receptors (ERs). The compounds exist mainly in the form of glycosides, which exhibit low bioavailability and function. To bioconvert liquiritin and isoliquiritin, the major estrogenic compounds, to the corresponding deglycosylated liquiritigenin and isoliquiritigenin, respectively, licorice was fermented with Monascus, which has been demonstrated to deglycosylate other substances. The contents of liquiritigenin and isoliquiritigenin in Monascus-fermented licorice increased by 10.46-fold (from 38.03 μM to 379.75 μM) and 12.50-fold (from 5.53 μM to 69.14 μM), respectively, compared with their contents in non-fermented licorice. Monascus-fermented licorice exhibited 82.5% of the ERβ binding activity of that observed in the positive control (17 β-estradiol), whereas the non-fermented licorice exhibited 54.1% of the binding activity in an in vivo ER binding assay. The increase in the ERβ binding activity was associated with increases in liquiritigenin and isoliquiritigenin contents. Liquiritigenin acts as a selective ligand for ERβ, which alleviates menopausal symptoms with fewer side effects, such as heart disease and hypertension, compared with a ligand for ERα. In addition, Monascus-fermented licorice contained 731 mg/kg of monacolin K, one of the metabolites produced by Monascus that reduces serum cholesterol. Therefore, Monascus-fermented licorice is a promising material for the prevention and treatment of menopausal syndrome with fewer side effects.

• 한국식품조리과학회:학술대회논문집
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• 한국식품조리과학회 1993년도 춘계 학술심포지움
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• pp.149-159
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• 1993

The concept of Solid-State Fermentation is briefly explained in comparison to other fermentation principles, and several types of fermenters are presented. A recently developed "Swing Reactor" for SSF is shown. When inoculated on rice, the mould Monascus purpureus forms red pigments, Which can be used as food colors (Ang-kak, Red Rice). By Response Surface Methodology, serveral factors have been optimized for maximal red colour formation. Showing that presoaking time of rice, pH of soaking water, age of preculture and inoculum size were not of importance within the observed limits. For a fermentation time of 7 days, start humidity is optimal at 34% and temperature is optimal at 28.8 C. These results of small scale fermentation could be transferred to the Swing Reactor.