From 2007.igem.org

Contents 1 Basic Model 1.1 Constitutively produced proteins 1.2 Learning system 1.3 Reporter system 2 System Equations 2.1 Constitutively produced proteins 2.2 Learning system 2.3 Reporter system 2.4 Allosteric regulation 2.5 Comments 3 Model Parameters 4 References 5 Variable Mapping

Basic Model

Constitutively produced proteins

Learning system

Reporter system

System Equations

Constitutively produced proteins

Learning system

Reporter system

Allosteric regulation

Comments

Note that the three constitutively produced proteins R, S and L exist in two different forms: as free proteins and in complexes they build with I_R, I_S and I_L, respectively. The total amount of protein is denoted with a subscript t (e.g. R_t) in the above formulas. The amount of protein existing as complex is denoted with a superscript * (e.g. R*). The difference is the amount of free protein (e.g. R_t - R*).

Model Parameters

Parameter	Value	Description	Comments
aR		basic production of lacI	obsolete
aS		basic production of tetR
aL		basic production of luxR
aQ1		basic production of cI
aQ2		basic production of p22cII
aYFP		basic production of YFP
aGFP		basic production of GFP
aRFP		basic production of RFP
aCFP		basic production of CFP
dR	0.06	degradation of lacI	Ref. [4] --please only add parameter values with proper dimensions, a number like this is useless (Uhrm 04:43, 13 September 2007 (EDT))--
dS		degradation of tetR
dL		degradation of luxR
dQ1		degradation of cI
dQ2		degradation of p22cII
dYFP		degradation of YFP
dGFP		degradation of GFP
dRFP		degradation of RFP
dCFP		degradation of CFP
cQ1,1		promoter strength (R/Q2 inhibited)	maybe Ref. [5] can be of help here (for inhibition of R)
cQ1,2		promoter strength (L activated/Q2 inhibited)
cQ2,1		promoter strength (S/Q1 inhibited)	maybe Ref. [5] can be of help here (for inhibition of Q1)
cQ2,2		promoter strength (L activated/Q1 inhibited)	maybe Ref. [5] can be of help here (for inhibition of Q1)
cYFP		promoter strength (S/Q1 inhibited)	see also cQ2,1
cGFP		promoter strength (R/Q2 inhibited)	see also cQ1,1
cRFP		promoter strength (S/Q2 inhibited)
cCFP		promoter strength (R/Q1 inhibited)
KR	1.3e-3 - 2e-3 [mM/h]	lacI repressor dissociation constant	lower value is from Ref. [2], higher value is from Ref. [5]
KIR	1.5e-10 [mM/h]	IPTG-lacI repressor dissociation constant	Ref. [5]
KS		tetR repressor dissociation constant
KIS		aTc-tetR repressor dissociation constant
KL		luxR activator dissociation constant
KIL		AHL-luxR activator dissociation constant
KQ1	2e-3 [mM/h]	cI repressor dissociation constant	Ref. [5]
KQ2		p22cII repressor dissociation constant
nR	1	lacI repressor Hill cooperativity	Ref. [5]
nIR	2	IPTG-lacI repressor Hill cooperativity	Ref. [5]
nS	3	tetR repressor Hill cooperativity	Ref. [3]
nIS		aTc-tetR repressor Hill cooperativity
nL	1	luxR activator Hill cooperativity	Ref. [3]
nIL	1	AHL-luxR activator Hill cooperativity	Ref. [3]
nQ1	1.9	cI repressor Hill cooperativity	Ref. [5]
nQ2		p22cII repressor Hill cooperativity

References

1. A synthetic time-delay circuit in mammalian cells and mice (http://www.pnas.org/cgi/content/abstract/104/8/2643)
2. Detailed map of a cis-regulatory input function (http://www.pnas.org/cgi/content/full/100/13/7702?ck=nck)
3. Parameter Estimation for two synthetic gene networks (http://ieeexplore.ieee.org/iel5/9711/30654/01416417.pdf)
4. Supplementary on-line information for "A Synthetic gene-metabolic oscillator" (no link)
5. Genetic network driven control of PHBV copolymer composition (http://doi:10.1016/j.jbiotec.2005.08.030)

Variable Mapping

Variable	Compound
R	lacI
IR	IPTG
S	tetR
IS	aTc
L	luxR
IL	AHL
Q1	cI
Q2	p22cII