Mucor javanicus

Lipase M (Mucor javanicus), pH 7, 37°, 70-88% yield. In this case, a- and )3-glycosidic peptide derivatives were deprotected. Acetates on the pyrano-sides were not affected. ... 

In our previous work [63], we studied the hydrolysis kinetics of lipase from Mucor javanicus in a modified Lewis cell (Fig. 4). Initial hydrolysis reaction rates (uri) were measured in the presence of lipase in the aqueous phase (borate buffer). Initial substrate (trilinolein) concentration (TLj) in the organic phase (octane) was between 0.05 and 8 mM. The presence of the interface with octane enhances hydrolysis [37]. Lineweaver-Burk plots of the kinetics curve (1/Uj.] = f( /TL)) gave straight lines, demonstrating that the hydrolysis reaction shows the expected kinetic behavior (Michaelis-Menten). Excess substrate results in reaction inhibition. Apparent parameters of the Michaelis equation were determined from the curve l/urj = f /TL) and substrate inhibition was determined from the curve 1/Uj.] =f(TL) ... 

Free lipase from Mucor javanicus Octane-borate buffer pH 9.6 (1/1) Trilinolein hydrolysis 25°C 9.8 /xM/min 192 pM Kss = 5300 /xM 63... 

Alcohol dehydrogenases (Coenzyme) Lactobacillus kefir (NADP) Mucor javanicus (NAD) yeast (NAD) not known... 

Mucor javanicus dihydroxyacetone reductase251 E3 Yeast alcohol dehydrogenase258... 

Balcao, V.M., Malcata, F.X. 1998b. Interesterification and acidolysis of butterfat with oleic acid by Mucor javanicus lipase changes in the pool of fatty acid residues. Enz. Microb. Technol. 22, 511-519. 

Fucose has been detected in many fungi. It is formed on hydrolysis of the cell walls of the yeast-like fungi Mucor adventitius, Mucor hiemalis, Mucor javanicus, Mucor plumbeus, Mucor racemosus, Mucor spinosus, and Mucor sylvaticus, and in Rhizopus oryzae, Rhizoptts tamari, Rhizopus tonkiniensis, and Zygorrhyncus vuillemmU. The acidic, exocellular polysaccharide of Mucor racemosus contains L-fucosyl residues. ... 

The full capacity of the lipase-mediated technique for C-terminal deprotection is demonstrated in the synthesis of complex C>-glycopeptides, which are sensitive to both acids and bases, The key starting material, serine glycoside heptyl ester 11, is selectively depro-tected at the C-terminus by lipase obtained from the fungus Mucor javanicus (Scheme 22). The free carboxylic acid derivative 12 is coupled with an N-terminally protected glyco-dipeptide 13 to generate the tripeptide 14. 

Scheme 23 Lability and Stability of the C-Terminal (2-Methoxyethoxy)ethyl Ester of Glycopeptides to Lipases from Mucor javanicus and Wheat Germl ...

In addition to these examples, the lipase from Mucor javanicus accepts various further glycosylated amino acids and peptides as substrates and selectively deprotects them at the C-terminus (Fig. 13). The enzyme tolerates varia-... 

Interesterification can also be catalysed by enzymes, many of which show useful specificities. The 1,3-specific lipases, such as those derived from Aspergillus niger, Mucor javanicus, M. miehei, Rhizopus arrhizus, R. delemar, and R. niveus, are particularly useful for interesterification. They are used to effect acyl exchange at the sn- and 3 positions while leaving acyl groups at the sn-2 position unchanged. 

With few exceptions, e.g., Mucor javanicus,5,37 their stereospecificities obey the Prelog rule.5 12 This has been exploited in several prostaglandin preparations.12 Considerable control can be exerted over the stereochemistry during oxidoreduction as is demonstrated by the formation of 8, 9, and 10 from (+) 7.3 For these and other enzymes sophisticated "diamond lattice" active site models are available for making stereochemical predic-... 

Table 11.1-11. Lipase-catalyzed enantiotopos-differentiating hydrolysis of prochiral cyclic diol dialkanoates in aqueous solution (CCL Candida cylindracea lipase, PFL Pseudomonas jiuorescens lipase, MML Mucor miehei lipase, CVL Chromobacterium viscosum lipase, PPL pig pancreas lipase, MJL Mucor javanicus lipase, RSL Rhizopus sp. lipase, PCL Pseudomonas cepacia lipase, CCL, Ceotricum candidum lipase, ANL Aspergillus niger lipase, FSPC Fusarium solani pisi cutinase, CRL Candida rugosa lipase, CAL-B Candida antarctica B lipase, LIP Pseudomonas sp. lipase-Toyobo, RDL Rhizopus delemar lipase, MSL Mucor sp. lipase, CAL Candida antarctica lipase, not specified).

El Pseudomonas sp. alcohol dehydrogenase 61 Lactobacillus kefir alcohol dehydrogenase171 E2 Geotrichum candidum glycerol dehydrogenase18-101 Mucor javanicus dihydroxyacetone reductase1 11 E3 Yeast alcohol dehydrogenase1121... 

Apart from acetone-dried G. candidum IFO 4597, intact whole cells of various strains of G. candidum have been found to be useful for asymmetric reduc-tions(75 78, 101, 120 167 171) For example, methyl 2-acetylbenzoate was reduced by G. candidum ATCC 34614, IFO 5767 or IFO 4597 as well as by other microorganisms such as Mucor javanicus, Mucor heimalis, Endomyces magnusii, Endomyces reessii and bakers yeast to afford phthalide derivatives (Fig. 15-26) which have various pharmacological profiles such as relaxant, antiproliferative or antiplatelet effects, etc.[171). 

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