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Molecule List for pathway Ras (Pathway Number 493) in Accession Ajay_bhalla_2007_ReacDiff1_1e-12 (Accession Number 81) | Default ordering is done according to Pathway Number. Table headers can be used for changing the default ordering.
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The entries are grouped according to Pathway Number and are alternately color coded using  and  color. |
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Name | Accession
Type | Initial
Conc.
(uM) | Volume
(fL) | Buffered | Sum Total Of | | 1 | CaM-GEF | Network | 0 | 0 | No | - | | | See Farnsworth et al Nature 376 524-527 1995 | | 2 | GAP | Network | 0.01 | 0 | No | - | | | GTPase-activating proteins. See Boguski and McCormick. Turn off Ras by helping to hydrolyze bound GTP. This one is probably NF1, ie., Neurofibromin as it is inhibited by AA and lipids, and expressed in neural cells. p120-GAP is also a possible candidate, but is less regulated. Both may exist at similar levels. See Eccleston et al JBC 268(36) pp27012-19 Level=.002 16 May 2003: Increased level to 0.0036, in line with other concentration raises at the synapse. | | 3 | GAP* | Network | 0 | 0 | No | - | | 4 | GDP-Ras | Network | 0.5 | 0 | No | - | | | GDP bound form. See Rosen et al Neuron 12 1207-1221 June 1994. the activation loop is based on Boguski and McCormick Nature 366 643-654 93 Assume Ras is present at about the same level as craf-1, 0.2 uM. Hallberg et al JBC 269:6 3913-3916 1994 estimate upto 5-10% of cellular Raf is assoc with Ras. Given that only 5-10% of Ras is GTP-bound, we need similar amounts of Ras as Raf. | | 5 | GEF* | Network | 0 | 0 | No | - | | | phosphorylated and thereby activated form of GEF. See, e.g. Orita et al JBC 268:34 25542-25546 1993, Gulbins et al. It is not clear whether there is major specificity for tyr or ser/thr. | | 6 | GTP-Ras | Network | 0 | 0 | No | - | | | Only a very small fraction (7% unstim, 15% stim) of ras is GTP-bound. Gibbs et al JBC 265(33) 20437 | | 7 | inact-GEF | Network | 0.1 | 0 | No | - | | | Assume that SoS is present only at 50 nM. Revised to 100 nM to get equil to experimentally known levels. |
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