1
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Affiliation(s)
- D. A. Denison
- Department of Biology, Southwest Texas State University, San Marcos, Texas 78666
| | - R. D. Koehn
- Department of Biology, Southwest Texas State University, San Marcos, Texas 78666
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2
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Lamed R, Bayer EA. The Cellulosome of Clostridium thermocellum. ADVANCES IN APPLIED MICROBIOLOGY 1988. [DOI: 10.1016/s0065-2164(08)70203-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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3
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Garg SK, Neelakantan S. Studies on the properties of cellulase enzyme fromAspergillus terreus GN1. Biotechnol Bioeng 1982; 24:737-42. [DOI: 10.1002/bit.260240316] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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4
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Rapp P, Grote E, Wagner F. Formation and Location of 1,4-β-Glucanases and 1,4-β-Glucosidases from
Penicillium janthinellum. Appl Environ Microbiol 1981; 41:857-66. [PMID: 16345751 PMCID: PMC243824 DOI: 10.1128/aem.41.4.857-866.1981] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Formation and location of 1,4-β-glucanases and 1,4-β-glucosidases were studied in cultures of
Penicillium janthinellum
grown on Avicel, sodium carboxymethyl cellulose, cellobiose, glucose, mannose, and maltose. Endo-1,4-β-glucanases were found to be cell free, and their formation was induced by cellobiose. 1,4-β-Glucosidases, on the other hand, were formed constitutively and were primarily cell free, but with a small amount strongly associated with the cell wall. Low 1,4-β-glucosidase activities of periplasmic or intracellular origin were also found. A rotational viscosimetric method was developed to measure the total endo-1,4-β-glucanase activity of the culture (broth and solids). By this method, it was possible to determine the endo-1,4-β-glucanase activity not only in the supernatant of the culture but also on the surface of the mycelium or absorbed on residual Avicel. During a 70-liter batch cultivation of
P. janthinellum
, the adsorption of endo-1,4-β-glucanases by residual and newly added 10% Avicel was measured. The adsorption of soluble protein and endo-1,4-β-glucanases by Avicel was found to be largely independent of the pH value but dependent on temperature.
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Affiliation(s)
- P Rapp
- Gesellschaft für Biotechnologische Forschung mbH, 3300 Braunschweig-Stöckheim, Federal Republic of Germany
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5
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Montenecourt BS, Eveleigh DE. Semiquantitative Plate Assay for Determination of Cellulase Production by
Trichoderma viride. Appl Environ Microbiol 1977; 33:178-83. [PMID: 16345184 PMCID: PMC170619 DOI: 10.1128/aem.33.1.178-183.1977] [Citation(s) in RCA: 88] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A plate clearing assay was devised to screen for high-producing cellulase mutants of
Trichoderma viride
. The method employs (i) the use of either rose bengal or oxgall to limit colony size and (ii) Phosfon D (tributyl-2, 4-dichloroben-zylphosphonium chloride) to enhance cellulase detection, in combination with acid-swollen cellulose on agar plates. The method was used to isolate constitutive cellulase mutants of
T. viride
and should prove useful for isolating high-producing mutants from a range of organisms. This technique has been also used to determine the concentration at which glucose and glycerol inhibit cellulase synthesis by catabolite repression in the wild-type strains.
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Affiliation(s)
- B S Montenecourt
- Department of Biochemistry and Microbiology, Cook College, Rutgers - The State University of New Jersey, New Brunswick, New Jersey 08903
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