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Titolo:
DE-REGULATED ASSIMILATION AND OVER-PRODUCTION OF AMINO-ACIDS IN ANALOG-RESISTANT MUTANTS OF A CYANOBACTERIUM, PHORMIDIUM-UNCINATUM
Autore:
RAO NS; SHAKILA TM; BAGCHI SN;
Indirizzi:
MDS UNIV,DEPT MICROBIOL AMJER 305001 RAJASTHAN INDIA RANI DURGAVATI UNIV,DEPT BIOL SCI JABALPUR 482001 MADHYA PRADESH INDIA
Titolo Testata:
World journal of microbiology & biotechnology
fascicolo: 6, volume: 11, anno: 1995,
pagine: 665 - 668
SICI:
0959-3993(1995)11:6<665:DAAOOA>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPIRULINA-PLATENSIS; ANACYSTIS-NIDULANS; BIOSYNTHESIS; PATHWAY; STRAINS;
Keywords:
AMINO-ACID ASSIMILATION; AMINO-ACID OVER-PRODUCTION; CYANOBACTERIA; ENZYME DE-REGULATION; MICROBIAL CELL PROTEIN; PHORMIDIUM UNCINATUM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
N.S. Rao et al., "DE-REGULATED ASSIMILATION AND OVER-PRODUCTION OF AMINO-ACIDS IN ANALOG-RESISTANT MUTANTS OF A CYANOBACTERIUM, PHORMIDIUM-UNCINATUM", World journal of microbiology & biotechnology, 11(6), 1995, pp. 665-668

Abstract

Mutant strains of Phormidium uncinatum resistant to fluoro-phenylalanine, azatryptophan, fluorotyrosine and azaleucine accumulated a wide range of amino acids, notably glutamic acid, lysine, tyrosine and phenylalanine, and exhibited de-regulated valine and phenylalanine transport. While acetohydroxy acid synthase in azaleucine-resistant mutants lost valine- and leucine-sensitivity, 3-deoxy-D-arabinoheplulosonate-7-phosphate (DAHP) synthase and prephenate dehydratase in aromatic analogue-resistant strains became phenylalanine-insensitive and shikimate and prephenate dehydrogenases were activated by tyrosine. In addition, activities of nitrate-assimilating enzymes were higher in the mutants, which also exhibited increased nitrogen, protein and phycocyanin contents, The proteins in the mutants were better digested upon enzymatic-treatments and feeding trials than those of the wild type, indicating that they are usable as single-cell protein.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 06:55:02