Bioluminescence

Citation
T. Wilson et Jw. Hastings, Bioluminescence, ANN R C DEV, 14, 1998, pp. 197-230
Citations number
163
Language
INGLESE
art.tipo
Review
Categorie Soggetti
Cell & Developmental Biology
Journal title
ANNUAL REVIEW OF CELL AND DEVELOPMENTAL BIOLOGY
ISSN journal
1081-0706 → ACNP
Volume
14
Year of publication
1998
Pages
197 - 230
Database
ISI
SICI code
1081-0706(1998)14:<197:B>2.0.ZU;2-D
Abstract
Bioluminescence has evolved independently many times; thus the responsible genes are unrelated in bacteria, unicellular algae, coelenterates, beetles, fishes, and others. Chemically, all involve exergonic reactions of molecul ar oxygen with different substrates (luciferins) and enzymes (luciferases), resulting in photons of visible light (approximate to 50 kcal). In additio n to the structure of luciferan, several factors determine the color of the emissions, such as the amino acid sequence of the luciferase (as in beetle s, for example) or the presence of accessory proteins, notably GFP, discove red in coelenterates and now used as a reporter of gene expression and a ce llular marker. The mechanisms used to control the intensity and kinetics of luminescence, often emitted as flashes, also vary. Bioluminescence is cred ited with the discovery of how some bacteria, luminous or not, sense their density and regulate specific genes by chemical communication, as in the fa scinating example of symbiosis between luminous bacteria and squid.