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  • 1
    Electronic Resource
    Electronic Resource
    Applied microbiology and biotechnology 54 (2000), S. 467-475 
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Clavulanic acid is a secondary metabolite produced by Streptomyces clavuligerus. It possesses a clavam structure and a characteristic 3R,5R stereochemistry essential for action as a β-lactamase inhibitory molecule. It is produced from glyceraldehyde-3-phosphate and arginine in an eight step biosynthetic pathway. The pathway is carried out by unusual enzymes, such as (1) the enzyme condensing both precursors, N 2-(2-carboxyethyl)-arginine (CEA) synthetase, (2) the β-lactam synthetase cyclizing CEA and (3) the clavaminate synthetase, a well-characterized multifunctional enzyme. Genes for biosynthesis of clavulanic acid and other clavams have been cloned and characterized. They offer new possibilities for modification of the pathway and for obtaining new molecules with a clavam structure. The state of the regulatory proteins controlling clavulanic acid biosynthesis, as well as the relationship between the biosynthetic pathway of clavulanic acid and other clavams, is discussed.
    Type of Medium: Electronic Resource
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  • 2
    German Medical Science GMS Publishing House; Düsseldorf
    In:  GMS Ophthalmology Cases; VOL: 13; DOC04 /20230130/
    Publication Date: 2023-01-31
    Description: Objective: Surgically induced scleral necrosis (SISN) is a potentially blinding sequela that may occur after any ocular procedure. SISN in the context of active tuberculosis is seldom seen. We report a case of a patient with asymptomatic tuberculosis who developed SISN after pterygium surgery.Methods: A 76-year-old Mexican-mestizo woman from Veracruz, Mexico, was referred to our clinic because of severe disabling pain and scleral thinning in her right eye.Results: Tubercular-related SISN was finally diagnosed and managed successfully with antitubercular therapy, topical and systemic corticosteroidsConclusion: Tuberculosis must be considered as a differential diagnosis of high-risk patients in the context of refractory SISN in endemic countries.
    Subject(s): antitubercular therapy ; infectious scleritis ; necrotizing scleritis ; ocular tuberculosis ; pterygium surgery ; scleral inflammation ; surgically induced scleral necrosis ; ddc: 610
    Language: English
    Type: article
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  • 3
    Publication Date: 2021-06-29
    Description: Service-Learning is an educational methodology that allows student learning while addressing community needs. A program in microbiology and infectious diseases was implemented in Universidad Complutense de Madrid, Spain. University lecturers, clinical microbiologists, doctorate students, and undergraduates from several Bachelor Degrees and courses worked in an interdisciplinary team along with social institutions that attend disadvantaged persons. Using commercial movies that deal with infectious diseases, the students learn clinical microbiology, prepare divulgation materials, visit social centers to accompany, and help others to know about illnesses and prevention. The program was developed through two academic years and involved 58 voluntary students, 13 teachers and tutors, and 4 social entities as community partners. Postsurvey evaluation of the program revealed a highly satisfactory achievement of goals: acquiring scientific and personal competencies by university students, including critical analysis and science diffusion, solving problems or collaborative team working, and contributing, together with the tutors, to the social responsibility of the university.
    Electronic ISSN: 1664-302X
    Topics: Biology
    Published by Frontiers Media
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