TY - JOUR
T1 - Dynamic properties of microtubules at steady state of polymerisation
AU - Martin, S.R.
AU - Schilstra, M.
AU - Bayley, P.M.
N1 - Original article can be found at: http://www.sciencedirect.com/science/journal/0006291X Copyright Elsevier Inc. [Full text of this article is not available in the UHRA]
PY - 1987
Y1 - 1987
N2 - Microtubules of tubulin dimer, polymerised in vitro to steady-state are shown to incorporate tubulin rapidly and extensively. The method involves adding [3H]-GTP to microtubules at steady state, and analysing for non-exchangeable [3H]-GDP in the presence of a GTP regenerating system. The rate and extent of this exchange process is dependent on the lenghth distribution of the microtubules, and is notably faster with sheared microtubules. We simulate all these features of the exchange kinetics, together with the length redistributions occurring at steady state of polymerisation, using a simple model based on a limited number of kinetic parameters deriving from the measurements of microtubule dynamics by Horio and Hotani [1]. The observed exchange kinetics thus provide a direct experimental criterion of ‘dynamic instability’ of microtubules at steady state of polymerisation.
AB - Microtubules of tubulin dimer, polymerised in vitro to steady-state are shown to incorporate tubulin rapidly and extensively. The method involves adding [3H]-GTP to microtubules at steady state, and analysing for non-exchangeable [3H]-GDP in the presence of a GTP regenerating system. The rate and extent of this exchange process is dependent on the lenghth distribution of the microtubules, and is notably faster with sheared microtubules. We simulate all these features of the exchange kinetics, together with the length redistributions occurring at steady state of polymerisation, using a simple model based on a limited number of kinetic parameters deriving from the measurements of microtubule dynamics by Horio and Hotani [1]. The observed exchange kinetics thus provide a direct experimental criterion of ‘dynamic instability’ of microtubules at steady state of polymerisation.
U2 - 10.1016/0006-291X(87)90390-1
DO - 10.1016/0006-291X(87)90390-1
M3 - Article
SN - 0006-291X
VL - 149
SP - 461
EP - 467
JO - Biochemical and Biophysical Research Communications
JF - Biochemical and Biophysical Research Communications
IS - 2
ER -