evolution of biological regulatory networks j. demongeot agim, cnrs/ujf grenoble...
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EVOLUTION OF BIOLOGICAL REGULATORY NETWORKS
J. DemongeotAGIM, CNRS/UJF
Grenoble
26/11/2011
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IMMUNETWORKS: THE ROLE OF CIRCUITS
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Robustness- Role of circuits- Role of n-switches- Role of microRNAs- Role of viruses
- Don’t forget resilienceJD, E. GOLES, M. MORVAN, M. NOUAL & S. SENÉ Attraction Basins as Gauges of Environmental Robustness in Biological Complex Systems.PloS ONE, 5, e11793 (2010).
- Don’t forget resistanceJJD & S. SENÉThe singular power of the environment on nonlinear Hopfield networks.In : CMSB’11,ACM Proceedings, New York, 55-64 (2011).
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RAG control networkC. Georgescu et al. PNAS 2008
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V(D)J Recombination Mechanism
Germinal Configuration
Jm CVn
TCRα
V-J Réarrangement
V(D)J Recombinase RAG (Recombination Activating gene)
TREC T-cell-Receptor Excisional Circle gene
N. PASQUAL ET AL. J. Exp. Medicine, 196, 1163-1174 (2002)T.P. BAUM ET AL. BMC Bioinformatics, 7, 224-228 (2006)
F. THUDEROZ ET AL. PLoS Comp. Biol., 6, e1000682 (2010)
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Distal J Genes
Proximal J Genes
V and J gene use: Experimental quantifications in BalbC mouse
Proxi
mal
V Genes
Dista
l
V Gen
es
Diversity of the TCR α Combinatorial Repertoire
Peripheral
TRAV 21
TRAV 1TRAV14-1TRAV14-2TRAV14-3
TRAV14-D1TRAV14-D2TRAV14-D3
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Negative 6
Negative 2
Valp
ara
iso2
6/1
1/2
01
1
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JD et al. Journal of Theoretical Biology 280, 19-33 (2011)F. Thuderoz et al. PloS Comp. Biol. 6 (2010)T.P. Baum et al. Nucleic Acids Res. 32, 51-54 (2004).
Valp
ara
iso2
6/1
1/2
01
1
RAG-1
TCRa
Runx1
RRunx1
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Parallel iterations
Valp
ara
iso2
6/1
1/2
01
1Noual, JD, SenéDAM (accepted)
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l = 3 × r / 2
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Positive circuits
Negative circuits
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Frustration
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NOT CODING GENOME: THE ROLE OF MICRORNAS
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Overview of mRNA and miRNA Processing
mRNA/miRNA pairingRNA binding oligopeptide
Non coding DNACoding DNA
pre-miRNA hairpin
Drosha Enzyme
Exportine-5
miRNA
CATGGTAC
GUAC
tRNAs
mRNA
pri-miRNA
RISC
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H.I. Suzuki et al., J. Mol. Med. 2010
mitochondrion
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target tRNA
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MITOMIRS
5’ GAUUAGGGUGCUUAGCUGUUAA 3’ MIR 1977 (A. Henrion-Caude, Mirifix, PLoS ONE 2011, JD et al. ECAL, MIT Press 2011)
G
G
U
C
U
A
U
U
C
U
U
G
G
G GA
U
U
AA
G
Valp
ara
iso
A2
6/1
1/2
01
1
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NOT CODING MITOCHONDRIAL DNA
5’ AUCUGGUUCUUACUUCAGGGC mitomir 10 Central 116
RARYGGUACU RRYUUCRARYU tRNA Lewin
AUCUGGUUCU UACUUCAGGAC mitomir 12 CSB D 353
mitomir 10 E. Sbisa Gene 205 (1997)
mitomir 12 P. Cui BMC Genomics 8 (2007) Valp
ara
iso2
6/1
1/2
01
1
R = A or G; Y = U or C
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THE ROLE OF VIRUSES
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Anatomie virale
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10
+
+
Negative circuitof size 3
Valp
ara
iso2
6/1
1/2
01
1
GENERAL ARCHITECTURE
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miR miR G1
G2
G3
G1
G2
G3
miR G1
G2
G3
Persistence of rhythm in case of weak inhibition
miR inhibition with parallel updating
Negative 3-switch Positive circuits
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NEUROGENETWORKS
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ROBUSTNESS
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[27] M. Cosnard, E. Goles, Discrete states neural networks and energies, Neural Networks 10 (1997) 327-34
X
n
X
1X
2
X
i
-
1
-
1
. . .
+ -
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Engrailed network
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p27, Cdk2, pCyCE Cdk2, CyCE Cdk2, miRNA159, pCycA Cdk2, CycA Cdk2, Rbp-E2F, Rb-E2F, E2F, Rbp, Rb
Cell cycle control
miRNA 34
Coherentfeed-forwarddouble path
Doublepositive
loop
p53
Parallel Sequential
mitomiRs
L. He et al. Nature 447, 1130-1134 (2007)
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miRNA159=1 Parallel updating
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ConclusionRobustness- Role of circuits- Role of n-switches- Role of microRNAs- Role of viruses
- Don’t forget resilienceJD, E. GOLES, M. MORVAN, M. NOUAL & S. SENÉ Attraction Basins as Gauges of Environmental Robustness in Biological Complex Systems.PloS ONE, 5, e11793 (2010).
- Don’t forget resistanceJJD & S. SENÉThe singular power of the environment on nonlinear Hopfield networks.In : CMSB’11,ACM Proceedings, New York, 55-64 (2011).