Artículo
Polymer phosphorylases:clues to the emergence of non-replicative and replicative polymers
Fecha de publicación:
12/2011
Editorial:
Springer
Revista:
Theory In Biosciences
ISSN:
1431-7613
1611-7530
1611-7530
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Polymer formation is arguably one of the essential factors that allowed the emergence, stabilisation and spread of life on Earth. Consequently, studies concerning biopolymers could shed light on the origins of life itself. Of particular interest are RNA and polysaccharide polymers, the archetypes of the contrasting proposed evolutionary scenarios and their respective polymerases. Nucleic acid polymerases were hypothesised, before<b> </b>their discovery, to have a functional similarity with glycogen phosphorylase. Further identification and characterisation of nucleic acid polymerases; particularly of polynucleotide phosphorylase (PNPase), provided experimental evidence for the initial premise. Once discovered, frequent similarities were found between PNPase and glycogen phosphorylase, in terms of catalytic features and biochemical properties. As a result, PNPase was seen as a model of primitive polymerase and used in laboratory precellular systems. Paradoxically however, these similarities were not sufficient as an argument in favour of an ancestral common polymerisation mechanism prior to polysaccharides and polyribonucleotides. Here we present an overview of the common features shared by polymer phosphorylases, with new proposals for the emergence of polysaccharide and RNA polymers.
Palabras clave:
Degradosome
,
Enolase
,
Polyphosphate
,
Piridoxal Phosphate
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Articulos(IMBIV)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Citación
Freire, Miguel Angel; Polymer phosphorylases:clues to the emergence of non-replicative and replicative polymers; Springer; Theory In Biosciences; 130; 4; 12-2011; 279-287
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