integração de modelos biológicos€¦ · 1 integração de modelos biológicos doutorando...
TRANSCRIPT
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1
Integração de Modelos
Biológicos
Doutorando Fernando Medeiros
Apresentação baseada em: Toward whole-cell models for science and engineering por Jonathan Karr
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Produtos
Químicos e Combustíveis
Otimize o rendimentoMinimize o
custo
Alimento
Otimizar o
rendimento
Resistir à seca
Evitar a infecção
Medicina
Prever prognósticos
Otimizar a terapia
Maximizar a qualidadede vida
Desafio central: prever o fenótipo do genótipo
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Exemplo: biossíntese de drogas
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Exemplo: biossíntese de drogas
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Exemplo: biossíntese de drogas
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Example: drug biosynthesis
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Exemplo: biossíntese de drogas
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Exemplo: biossíntese de drogas
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Exemplo: biossíntese de drogas
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A previsão do fenótipo a partir do genótipo requer modelos “célula inteira”
Exemplo: biossíntese de drogas
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Integrated
Comprehensive Dynamic
Gene-complete
Whole-cell modeling principles
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“A modelagem de células inteiras pode permitir
bioengenharia racional e medicina de precisão.”
“Propomos vários princípios-chave da modelagem de
células inteiras.”
“Descrevemos como construir um modelo de célula inteira, destacando as ferramentas
disponíveis.”
“Descrevemos os principais desafios de modelagem
computacional e experimental de células inteiras em código
aberto”
“Alcançar modelos completos de células inteiras requer uma
forte comunidade interdisciplinar.”
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Disponibilidade dos Dados
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?
Data Knowledge
Objetivos do Whole-cell model
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Whole-cell modeling
A grand challenge of the 21st century
– Masaru Tomita
A biologia precisa urgentemente de uma base teórica para unificá-la
– SydneyBrenner
O teste final de entender uma célula simples, mais do que
ser capaz de construir uma, seria construir um modelocomputacional da célula.
– Clyde Hutchison
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Single-cell variationMicroscopy
TranscriptionRNA-seq
Protein expressionMass-spec, Western blot
Desafio de modelagem de dados
heterogêneos
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MetabolicSignaling
Transcriptional regulatory
Modelling challenge
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Lengt
h
Growth
Replication
Transcription
Metabolism
Time
Modeling challenge
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Predictive modeling methodologies
Scope
BooleanBolouri, 2000’s
FBAPalsson, 1990’s
ODEShuler, 1970’s
PDEGillespie
Luthey-Schulten, 2011
Detail
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Predictive modeling methodologies
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UptakeFBA
Composition
MetabolismFBA
Composition
Transcription Stochastic binding Gene expression
Translation Stochastic binding Gene expression
Replication Chemical kinetics DNA sequence
Solution: integrated models
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0
25
50
75
100
1970's
Coarse-grained
ODEs
1990's
FBA
2000's
Boolean
models
2008
iFBA
2012
Whole-cell
model
% a
nnota
ted
genes
Whole-cell modelingprogress
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Model Validate
Engineer
Whole-cell modeling
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Validate
Engineer
Model
Whole-cell modeling
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Model construction
1. Definir sistema
2.Definir escopo
3.Curar dados
4.Escolha a representação
5.Identifique parâmetros
6. Testar previsões
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Comparative genomicsFraiser et. al, 1995
Genome-wide essentialityGlass et. al, 1999
M. genitalium is well-characterized
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Genomic-scale dataKühner et. al, 2009
M. genitalium is well-characterized
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Genomic transplantationLartigue et. al, 2009
Genomic synthesisGibson et. al, 2009
M. genitalium has unique engineering tools
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2. Escolher o escopo do modelo
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2. Escolher o escopo do modelo
• Representamexplicitamentecadametabólito, gene, RNA e proteína;
• Modelamexplicitamentea funçãode cadaprodutogênicocaracterizado;
• Explicao custometabólicode todosos produtosgênicosnãocaracterizados
• Representamoléculas importantese bemcaracterizadas individualmente
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3. Fazer curadoria dos dados
Karr et al., 2013
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Uptake
FBAComposition
MetabolismFBA
Composition
Transcription Stochastic events Gene expression
Translation Stochastic events Gene expression
Replication
Chemical kineticsDNA sequence
Sub-modelsStates
4. Selecionar a representação matemática mais adequada
Mass, shape
Metabolite, RNA, protein counts
Mammalian host
Transcript, polypeptide sequences
DNA polymerization, proteins, modifications
FtsZ ring
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1 s
Simular o algoritmo
Uptake
Metabolism
Replication
Cell
sta
tes
Cell
sta
tes
Uptake
Metabolism
Transcription Transcription
Translation Translation
Replication
Cell
sta
tes
Uptake
Metabolism
Transcription
Translation
Replication
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Muitos recursos são compartilhados
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1 s
Uptake
Metabolism
Cell
sta
tes
Cell
sta
tes
Uptake
Metabolism
Transcription Transcription
Translation Translation
Replication Replication
Cell
sta
tes
Uptake
Metabolism
Transcription
Translation
Replication
Div
ide
sta
te
Div
ide
sta
te
Div
ide
sta
te
Simular o algoritmo
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O modelo da Mycoplasma contém 28sub-models
Karr et al., 2012
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Karr et al., 2012
Example sub-model: Transcription
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Example sub-model: Transcription
Karr et al., 2012
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Free
Bound
Promoter
BoundActive
3. Bind RNA polymerase
1. Update RNA polymerase states 2. Calculate promoter affinities
AUGAUCCGUCUCUAAUGUCUAC
UTCAACGUGAGGUAAUAAAGUC
UCCACGAUGCUACUGUAUC
GCCUCAUACUGCGGAU
UUACGUAUCAGUGAUCAGUACU
4. Elongate and terminatetranscripts
Sequence
Tra
nscript
HcrAFur GntR LuxR Spx
glpF dnaJ dnaK gntR trxB polC
Example sub-model: Transcrição
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A redução do modelo permite a identificação de parâmetros
3. Manually tune parameters
using full model
Time
1. Reduce model
Experiment Model
Mole
cule
Mole
cule
2. Identify reduced model
parameters using
traditional methods
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Software: wholecell.org
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• ODE models
• COPASI: copasi.org
• V-Cell: nrcam.uchc.edu
• Systems biology toolbox
• Boolean models
• CellNOpt
• Flux-balance analysis
• openCOBRA: opencobra.sourceforge.net
• RAVEN
• Integrative models
• E-Cell: e-cell.org
• Whole-cell: wholecell.org
• Standards
• SBML: sbml.org
• CellML: cellml.org
Software
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Metabolite concentrations
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RNA synthesis rates
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Karr et al., 2012
DNA binding
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Translation
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Model
Engineer
Whole-cell modeling
Validate
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Matches training dataCell mass,volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Gene essentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
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Matches training dataCell mass,volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Gene essentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 51: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/51.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Gene essentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 52: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/52.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Gene essentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 53: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/53.jpg)
Model reproduces observed metabolomics
Karr et al., 2012
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Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Gene essentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 55: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/55.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Gene essentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 56: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/56.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Geneessentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 57: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/57.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Geneessentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 58: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/58.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Geneessentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 59: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/59.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Geneessentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 60: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/60.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Geneessentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 61: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/61.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Geneessentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 62: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/62.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Geneessentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errorsPlot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 63: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/63.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Geneessentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errors Plot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 64: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/64.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Geneessentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errors Plot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 65: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/65.jpg)
Matches training data Cell mass, volume
Biomass composition
RNA, protein expression, half-lives
Superhelicity
Matches published dataMetabolite concentrations
DNA-bound protein density
Geneessentiality
Matches newdataWild-type growth rate
Disruption strain growth rates
Matches theoryMass conservation
Central dogma
Cell theory
Evolution
No obvious errors Plot model predictions
Manually inspect data
Compare to known biology
Software stableSimulation code is stable
Tests passing
Validate model against experiments and theory
![Page 66: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/66.jpg)
• Como podemos modelar fisiologia mais complexa?
• Como podemos modelar organismos mais complexos?
• Larger bacteria
• Eukaryotes
• Multicellularity
• Humans
• Como podemos usar modelos para direcionar a engenharia?
Desafios
![Page 67: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/67.jpg)
• Karr JR et al. (2012) A Whole-Cell Computational Model Predicts Phenotype fromGenotype. Cell, 150, 389-401.
• Macklin DN, Ruggero NA, Covert MW (2014) The future of whole-cell modeling. Curr Opin Biotechnol, 28C, 111-115.
• Shuler ML, Foley P, Atlas J (2012). Modeling a minimal cell. Methods Mol Biol, 881, 573-610.
• Joyce AR, Palsson BØ (2007). Toward whole cell modeling and simulation:
comprehensive functional genomics through the constraint-based approach. Prog
Drug Res 64, 267-309.
• Tomita M (2001). Whole-cell simulation: a grand challenge of the 21st century.Trends Biotechnol 6, 205-10.
• Surovtsev IV et al. (2009) Mathematical modeling of a minimal protocell with coordinated growth and division. J Theor Biol, 260, 422-9.
Leituras recomendadas
![Page 68: Integração de Modelos Biológicos€¦ · 1 Integração de Modelos Biológicos Doutorando Fernando Medeiros Apresentação baseada em: Toward whole-cell models for science and](https://reader033.vdocuments.site/reader033/viewer/2022060720/6080d30d5d49fb16bc16609b/html5/thumbnails/68.jpg)
• Thiele I et al. (2009). Genome-scale reconstruction of Escherichia coli's
transcriptional and translational machinery: a knowledge base, its mathematical
formulation, and its functional characterization. PLoS Comput Biol. 5, e1000312.
• Orth JD, Thiele I, Palsson BØ (2010). What is flux balance analysis? Nat Biotechnol, 28, 245-8.
• Covert MW et al (2008). Integrated Flux Balance Analysis Model of Escherichia coli.Bioinformatics 24, 2044–50.
• Covert MW et al (2004). Integrating high-throughput and computational dataelucidates bacterial networks. Nature, 429, 92-6.
Leituras recomendadas: FBA