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2016 ; 7
(ä): 10202
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English Wikipedia
Molecular sled is an eleven-amino acid vehicle facilitating biochemical
interactions via sliding components along DNA
#MMPMID26831565
Mangel WF
; McGrath WJ
; Xiong K
; Graziano V
; Blainey PC
Nat Commun
2016[Feb]; 7
(ä): 10202
PMID26831565
show ga
Recently, we showed the adenovirus proteinase interacts productively with its
protein substrates in vitro and in vivo in nascent virus particles via
one-dimensional diffusion along the viral DNA. The mechanism by which this occurs
has heretofore been unknown. We show sliding of these proteins along DNA occurs
on a new vehicle in molecular biology, a 'molecular sled' named pVIc. This
11-amino acid viral peptide binds to DNA independent of sequence. pVIc slides on
DNA, exhibiting the fastest one-dimensional diffusion constant, 26±1.8 × 10(6)
(bp)(2)?s(-1). pVIc is a 'molecular sled,' because it can slide heterologous
cargos along DNA, for example, a streptavidin tetramer. Similar peptides, for
example, from the C terminus of ?-actin or NLSIII of the p53 protein, slide along
DNA. Characteristics of the 'molecular sled' in its milieu (virion, nucleus) have
implications for how proteins in the nucleus of cells interact and imply a new
form of biochemistry, one-dimensional biochemistry.